{"id":3760,"date":"2025-04-23T10:30:01","date_gmt":"2025-04-23T01:30:01","guid":{"rendered":"https:\/\/dexall.co.jp\/articles\/?p=3760"},"modified":"2025-04-23T10:30:03","modified_gmt":"2025-04-23T01:30:03","slug":"%e3%80%90%e5%ae%8c%e5%85%a8%e3%82%ac%e3%82%a4%e3%83%89%e3%80%91php-error_log%e3%81%ae%e4%bd%bf%e3%81%84%e6%96%b913%e9%81%b8-%e3%80%9c%e5%9f%ba%e6%9c%ac%e3%81%8b%e3%82%89%e5%ae%9f%e8%b7%b5%e3%83%86","status":"publish","type":"post","link":"https:\/\/dexall.co.jp\/articles\/?p=3760","title":{"rendered":"\u3010\u5b8c\u5168\u30ac\u30a4\u30c9\u3011PHP error_log\u306e\u4f7f\u3044\u65b913\u9078 \u301c\u57fa\u672c\u304b\u3089\u5b9f\u8df5\u30c6\u30af\u30cb\u30c3\u30af\u307e\u3067"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">PHP\u3067\u306e\u958b\u767a\u4e2d\u306b\u5947\u5999\u306a\u52d5\u4f5c\u304c\u767a\u751f\u3057\u305f\u308a\u3001\u672c\u756a\u74b0\u5883\u3067\u4e88\u671f\u305b\u306c\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3057\u305f\u308a\u3057\u305f\u7d4c\u9a13\u306f\u3042\u308a\u307e\u305b\u3093\u304b\uff1f\u305d\u3093\u306a\u3068\u304d\u3001\u591a\u304f\u306e\u958b\u767a\u8005\u306f\u30d6\u30e9\u30a6\u30b6\u306b\u8868\u793a\u3055\u308c\u308b\u30a8\u30e9\u30fc\u30e1\u30c3\u30bb\u30fc\u30b8\u306b\u983c\u308a\u304c\u3061\u3067\u3059\u304c\u3001\u305d\u308c\u3060\u3051\u3067\u306f\u6839\u672c\u7684\u306a\u554f\u984c\u89e3\u6c7a\u306b\u306f\u306a\u308a\u307e\u305b\u3093\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5b9f\u306f\u3001PHP\u306b\u306f\u5f37\u529b\u306a\u30c7\u30d0\u30c3\u30b0\u30c4\u30fc\u30eb\u300cerror_log\u300d\u304c\u6a19\u6e96\u642d\u8f09\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u3057\u304b\u3057\u3001\u305d\u306e\u672c\u5f53\u306e\u4fa1\u5024\u306b\u6c17\u3065\u3044\u3066\u3044\u308b\u958b\u767a\u8005\u306f\u610f\u5916\u3068\u5c11\u306a\u3044\u306e\u304c\u73fe\u72b6\u3067\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u672c\u8a18\u4e8b\u3067\u306f\u3001PHP error_log\u306e\u57fa\u672c\u7684\u306a\u4f7f\u3044\u65b9\u304b\u3089\u5b9f\u8df5\u7684\u306a\u6d3b\u7528\u30c6\u30af\u30cb\u30c3\u30af\u3001\u3055\u3089\u306b\u306f\u958b\u767a\u73fe\u5834\u3067\u5373\u5b9f\u8df5\u3067\u304d\u308b\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u307e\u3067\u3092\u5fb9\u5e95\u89e3\u8aac\u3057\u307e\u3059\u3002\u3053\u306e\u8a18\u4e8b\u3092\u8aad\u3080\u3053\u3068\u3067\u3001\u4ee5\u4e0b\u306e\u3053\u3068\u304c\u5b66\u3079\u307e\u3059\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>PHP\u30a8\u30e9\u30fc\u30ed\u30b0\u306e\u57fa\u672c\u8a2d\u5b9a\u3068\u6d3b\u7528\u65b9\u6cd5<\/li>\n\n\n\n<li>\u958b\u767a\u52b9\u7387\u3092\u98db\u8e8d\u7684\u306b\u5411\u4e0a\u3055\u305b\u308b\u30ed\u30b0\u6d3b\u7528\u30c6\u30af\u30cb\u30c3\u30af<\/li>\n\n\n\n<li>\u74b0\u5883\u5225\uff08\u958b\u767a\u30fb\u672c\u756a\uff09\u306e\u6700\u9069\u306a\u30a8\u30e9\u30fc\u30ed\u30b0\u8a2d\u5b9a<\/li>\n\n\n\n<li>\u30c1\u30fc\u30e0\u958b\u767a\u306b\u304a\u3051\u308b\u30a8\u30e9\u30fc\u30ed\u30b0\u7ba1\u7406\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u308c\u304b\u3089\u304a\u4f1d\u3048\u3059\u308b13\u306e\u5b9f\u8df5\u30c6\u30af\u30cb\u30c3\u30af\u3092\u6d3b\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u30c7\u30d0\u30c3\u30b0\u4f5c\u696d\u306e\u52b9\u7387\u304c\u5287\u7684\u306b\u5411\u4e0a\u3057\u3001\u3088\u308a\u5b89\u5b9a\u3057\u305fPHP\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u958b\u767a\u304c\u53ef\u80fd\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u305d\u308c\u3067\u306f\u3001PHP\u306e\u30a8\u30e9\u30fc\u30ed\u30b0\u7ba1\u7406\u306b\u3064\u3044\u3066\u6df1\u304f\u6398\u308a\u4e0b\u3052\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<div class=\"toc\"><br \/>\n<b>Warning<\/b>:  Undefined array key \"is_admin\" in <b>\/home\/xs392991\/dexall.co.jp\/public_html\/articles\/wp-content\/themes\/sango-theme\/library\/gutenberg\/dist\/classes\/Toc.php<\/b> on line <b>116<\/b><br \/>\n<br \/>\n<b>Warning<\/b>:  Undefined array key \"is_category_top\" in <b>\/home\/xs392991\/dexall.co.jp\/public_html\/articles\/wp-content\/themes\/sango-theme\/library\/gutenberg\/dist\/classes\/Toc.php<\/b> on line <b>121<\/b><br \/>\n<br \/>\n<b>Warning<\/b>:  Undefined array key \"is_top\" in <b>\/home\/xs392991\/dexall.co.jp\/public_html\/articles\/wp-content\/themes\/sango-theme\/library\/gutenberg\/dist\/classes\/Toc.php<\/b> on line <b>128<\/b><br \/>\n    <div id=\"toc_container\" class=\"sgb-toc--bullets js-smooth-scroll\" data-dialog-title=\"\u76ee\u6b21\">\n      <p class=\"toc_title\">\u76ee\u6b21 <\/p>\n      <ul class=\"toc_list\">  <li class=\"first\">    <a href=\"#i-0\">PHP\u306e\u30a8\u30e9\u30fc\u30ed\u30b0\u7ba1\u7406\u306f\u958b\u767a\u52b9\u7387\u306e\u8981 \u2013 error_log\u306e\u91cd\u8981\u6027<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-1\">\u30a8\u30e9\u30fc\u30ed\u30b0\u304c\u958b\u767a\u73fe\u5834\u306b\u3082\u305f\u3089\u30593\u3064\u306e\u4fa1\u5024<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-5\">\u306a\u305c\u591a\u304f\u306e\u958b\u767a\u8005\u304cerror_log\u3092\u898b\u9003\u3057\u3066\u3044\u308b\u306e\u304b<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-9\">PHP error_log\u95a2\u6570\u306e\u57fa\u672c\u3092\u7406\u89e3\u3059\u308b<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-10\">error_log\u95a2\u6570\u306e\u69cb\u6587\u3068\u5f15\u6570\u306e\u8a73\u7d30\u89e3\u8aac<\/a>      <\/li>      <li>        <a href=\"#i-11\">PHP\u30a8\u30e9\u30fc\u30ec\u30d9\u30eb\u3068error_log\u306e\u95a2\u4fc2\u6027<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-12\">php.ini\u3067\u306e\u30a8\u30e9\u30fc\u30ed\u30b0\u8a2d\u5b9a\u306e\u91cd\u8981\u6027<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-13\">\u4eca\u3059\u3050\u4f7f\u3048\u308b\uff01PHP error_log\u306e\u57fa\u672c\u7684\u306a\u4f7f\u3044\u65b9<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">      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<a href=\"#i-24\">\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u8a08\u6e2c\u306berror_log\u3092\u6d3b\u7528\u3059\u308b\u65b9\u6cd5<\/a>      <\/li>      <li>        <a href=\"#i-27\">\u30a8\u30e9\u30fc\u306e\u91cd\u8981\u5ea6\u306b\u5fdc\u3058\u305f\u30ed\u30b0\u51fa\u529b\u306e\u4f7f\u3044\u5206\u3051<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-29\">\u30d0\u30c3\u30af\u30c8\u30ec\u30fc\u30b9\u60c5\u5831\u3092\u542b\u3081\u305f\u8a73\u7d30\u306a\u30a8\u30e9\u30fc\u30ed\u30b0\u306e\u53d6\u5f97\u65b9\u6cd5<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-30\">\u74b0\u5883\u5225\uff01\u6700\u9069\u306aPHP error_log\u8a2d\u5b9a\u30ac\u30a4\u30c9<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-31\">\u958b\u767a\u74b0\u5883\u3067\u306e\u30c7\u30d0\u30c3\u30b0\u306b\u6700\u9069\u306a\u30a8\u30e9\u30fc\u30ed\u30b0\u8a2d\u5b9a<\/a>      <\/li>      <li>        <a href=\"#i-32\">\u672c\u756a\u74b0\u5883\u3067\u306e\u5b89\u5168\u306a\u30a8\u30e9\u30fc\u30ed\u30b0\u8a2d\u5b9a\u3068\u76e3\u8996\u65b9\u6cd5<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-33\">\u5404\u7a2e\u30d5\u30ec\u30fc\u30e0\u30ef\u30fc\u30af\uff08Laravel, WordPress\u7b49\uff09\u3067\u306eerror_log\u6d3b\u7528\u6cd5<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-36\">PHP error_log\u3067\u3088\u304f\u3042\u308b\u30c8\u30e9\u30d6\u30eb\u3068\u89e3\u6c7a\u7b56<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-37\">\u30ed\u30b0\u304c\u51fa\u529b\u3055\u308c\u306a\u3044\uff01\u8003\u3048\u3089\u308c\u308b\u539f\u56e0\u3068\u5bfe\u51e6\u6cd5<\/a>      <\/li>      <li>        <a href=\"#i-42\">\u30ed\u30b0\u30d5\u30a1\u30a4\u30eb\u306e\u30a2\u30af\u30bb\u30b9\u6a29\u9650\u3068\u30ed\u30fc\u30c6\u30fc\u30b7\u30e7\u30f3\u8a2d\u5b9a<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-45\">\u30de\u30eb\u30c1\u30b5\u30fc\u30d0\u30fc\u74b0\u5883\u3067\u306e\u30a8\u30e9\u30fc\u30ed\u30b0\u7ba1\u7406\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-49\">\u30d7\u30ed\u304c\u5b9f\u8df5\u3059\u308b\uff01PHP error_log\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-50\">\u30a8\u30e9\u30fc\u30ed\u30b0\u306e\u6a19\u6e96\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u3092\u5b9a\u3081\u3066\u30c1\u30fc\u30e0\u958b\u767a\u3092\u52b9\u7387\u5316<\/a>      <\/li>      <li>        <a href=\"#i-52\">\u30ed\u30b0\u30ed\u30fc\u30c6\u30fc\u30b7\u30e7\u30f3\u3068\u4fdd\u5b58\u671f\u9593\u306e\u6700\u9069\u306a\u8a2d\u5b9a\u65b9\u6cd5<\/a>      <\/li>      <li>        <a href=\"#i-54\">\u30ed\u30b0\u5206\u6790\u30c4\u30fc\u30eb\u3068\u9023\u643a\u3057\u3066\u30a8\u30e9\u30fc\u691c\u77e5\u3092\u81ea\u52d5\u5316\u3059\u308b<\/a>   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data-open-dialog=\"true\"><i class=\"fa fa-list\"><\/i><span class=\"sgb-toc-button__text\">\u76ee\u6b21\u3078<\/span><\/a>\n    <\/div><\/div><h2 class=\"wp-block-heading\" id=\"i-0\">PHP\u306e\u30a8\u30e9\u30fc\u30ed\u30b0\u7ba1\u7406\u306f\u958b\u767a\u52b9\u7387\u306e\u8981 \u2013 error_log\u306e\u91cd\u8981\u6027<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u300c\u306a\u305c\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u304c\u672c\u756a\u74b0\u5883\u3067\u52d5\u304b\u306a\u3044\u306e\u3060\u308d\u3046\uff1f\u300d\u300c\u3053\u306e\u30d0\u30b0\u306e\u539f\u56e0\u306f\u4e00\u4f53\u3069\u3053\u306b\u3042\u308b\u306e\u3060\u308d\u3046\uff1f\u300d<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u3093\u306a\u7591\u554f\u3067\u982d\u3092\u62b1\u3048\u305f\u7d4c\u9a13\u304c\u3042\u308b\u958b\u767a\u8005\u306f\u5c11\u306a\u304f\u306a\u3044\u3067\u3057\u3087\u3046\u3002PHP\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u958b\u767a\u306b\u304a\u3044\u3066\u3001\u30a8\u30e9\u30fc\u306e\u7279\u5b9a\u3068\u89e3\u6c7a\u306f\u6700\u3082\u6642\u9593\u3092\u6d88\u8cbb\u3059\u308b\u4f5c\u696d\u306e\u4e00\u3064\u3067\u3059\u3002\u3053\u306e\u8ab2\u984c\u3092\u52b9\u7387\u7684\u306b\u89e3\u6c7a\u3059\u308b\u9375\u3068\u306a\u308b\u306e\u304c\u3001\u9069\u5207\u306b\u8a2d\u5b9a\u30fb\u6d3b\u7528\u3055\u308c\u305f\u30a8\u30e9\u30fc\u30ed\u30b0\u3067\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">PHP\u306eerror_log\u6a5f\u80fd\u306f\u5358\u306a\u308b\u30a8\u30e9\u30fc\u30e1\u30c3\u30bb\u30fc\u30b8\u306e\u8a18\u9332\u30c4\u30fc\u30eb\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002\u305d\u308c\u306f\u6d17\u7df4\u3055\u308c\u305f\u8a3a\u65ad\u30b7\u30b9\u30c6\u30e0\u3067\u3042\u308a\u3001\u8efd\u5fae\u306a\u901a\u77e5\u304b\u3089\u81f4\u547d\u7684\u306a\u30a8\u30e9\u30fc\u307e\u3067\u3001\u3055\u307e\u3056\u307e\u306a\u554f\u984c\u3092\u968e\u5c64\u7684\u306b\u6349\u3048\u3001\u5404\u554f\u984c\u306b\u95a2\u3059\u308b\u91cd\u8981\u306a\u30e1\u30bf\u30c7\u30fc\u30bf\u3092\u63d0\u4f9b\u3057\u307e\u3059\u3002\u3064\u307e\u308a\u3001\u9069\u5207\u306b\u69cb\u6210\u3055\u308c\u305f\u30a8\u30e9\u30fc\u30ed\u30b0\u306f\u3001\u554f\u984c\u304c\u767a\u751f\u3057\u305f\u77ac\u9593\u306e\u72b6\u6cc1\u3092\u518d\u73fe\u3059\u308b\u305f\u3081\u306e\u8cb4\u91cd\u306a\u624b\u304c\u304b\u308a\u3068\u306a\u308b\u306e\u3067\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-1\">\u30a8\u30e9\u30fc\u30ed\u30b0\u304c\u958b\u767a\u73fe\u5834\u306b\u3082\u305f\u3089\u30593\u3064\u306e\u4fa1\u5024<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">PHP\u306eerror_log\u6a5f\u80fd\u3092\u9069\u5207\u306b\u6d3b\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u958b\u767a\u30c1\u30fc\u30e0\u306f\u4ee5\u4e0b\u306e3\u3064\u306e\u91cd\u8981\u306a\u4fa1\u5024\u3092\u5f97\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-2\">1. \u30c7\u30d0\u30c3\u30b0\u6642\u9593\u306e\u5927\u5e45\u306a\u77ed\u7e2e<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">PHP\u30a8\u30e9\u30fc\u30ed\u30b0\u3092\u7406\u89e3\u3057\u3066\u3044\u308b\u304b\u3069\u3046\u304b\u304c\u3001\u554f\u984c\u306b\u82e6\u6226\u3059\u308b\u304b\u52b9\u7387\u7684\u306b\u89e3\u6c7a\u3067\u304d\u308b\u304b\u306e\u9055\u3044\u3092\u751f\u307f\u51fa\u3057\u307e\u3059\u3002\u9069\u5207\u306b\u8a2d\u5b9a\u3055\u308c\u305f\u30a8\u30e9\u30fc\u30ed\u30b0\u3092\u6d3b\u7528\u3059\u308c\u3070\u3001\u554f\u984c\u306e\u767a\u751f\u5834\u6240\u3068\u539f\u56e0\u3092\u8fc5\u901f\u306b\u7279\u5b9a\u3067\u304d\u308b\u305f\u3081\u3001\u300c\u5f53\u3066\u63a8\u91cf\u300d\u306b\u3088\u308b\u30c7\u30d0\u30c3\u30b0\u304b\u3089\u89e3\u653e\u3055\u308c\u3001\u30c7\u30d0\u30c3\u30b0\u6642\u9593\u3092\u6700\u592780%\u524a\u6e1b\u3067\u304d\u308b\u30b1\u30fc\u30b9\u3082\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4f8b\u3048\u3070\u3001\u3042\u308be\u30b3\u30de\u30fc\u30b9\u30b5\u30a4\u30c8\u3067\u306f\u3001\u6ce8\u6587\u51e6\u7406\u6642\u306b\u65ad\u7d9a\u7684\u306b\u767a\u751f\u3057\u3066\u3044\u305f\u30a8\u30e9\u30fc\u306e\u539f\u56e0\u3092\u3001\u30a8\u30e9\u30fc\u30ed\u30b0\u306e\u8a73\u7d30\u306a\u5206\u6790\u306b\u3088\u3063\u3066\u7279\u5b9a\u3057\u30012\u9031\u9593\u304b\u304b\u3063\u3066\u3044\u305f\u554f\u984c\u89e3\u6c7a\u3092\u534a\u65e5\u3067\u5b8c\u4e86\u3055\u305b\u305f\u4e8b\u4f8b\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-3\">2. \u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u54c1\u8cea\u3068\u5b89\u5b9a\u6027\u306e\u5411\u4e0a<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">\u30a8\u30e9\u30fc\u30ed\u30b0\u306f\u30d0\u30b0\u306e\u4e8b\u5f8c\u5bfe\u5fdc\u3060\u3051\u3067\u306a\u304f\u3001\u6f5c\u5728\u7684\u306a\u554f\u984c\u306e\u65e9\u671f\u767a\u898b\u306b\u3082\u5f79\u7acb\u3061\u307e\u3059\u3002\u8b66\u544a\uff08Warning\uff09\u30ec\u30d9\u30eb\u306e\u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u7d99\u7d9a\u7684\u306b\u76e3\u8996\u3059\u308b\u3053\u3068\u3067\u3001\u81f4\u547d\u7684\u306a\u30a8\u30e9\u30fc\u306b\u767a\u5c55\u3059\u308b\u524d\u306b\u554f\u984c\u3092\u691c\u51fa\u3057\u5bfe\u51e6\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u307e\u305f\u3001API\u30b3\u30fc\u30eb\u3084\u30d5\u30a1\u30f3\u30af\u30b7\u30e7\u30f3\u30b3\u30fc\u30eb\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u8ffd\u8de1\u3057\u305f\u308a\u3001\u30ed\u30b0\u30a4\u30f3\u3001\u30b5\u30a4\u30f3\u30a2\u30c3\u30d7\u3001\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u306a\u3069\u306e\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3067\u306e\u91cd\u8981\u306a\u30a4\u30d9\u30f3\u30c8\u306e\u767a\u751f\u3092\u30ab\u30a6\u30f3\u30c8\u3057\u305f\u308a\u3059\u308b\u3053\u3068\u3067\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u5b9f\u884c\u72b6\u6cc1\u3092\u30ea\u30a2\u30eb\u30bf\u30a4\u30e0\u3067\u628a\u63e1\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-4\">3. \u30c1\u30fc\u30e0\u958b\u767a\u306b\u304a\u3051\u308b\u30b3\u30df\u30e5\u30cb\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u5186\u6ed1\u5316<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">\u6a19\u6e96\u5316\u3055\u308c\u305f\u30a8\u30e9\u30fc\u30ed\u30b0\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u3092\u63a1\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u958b\u767a\u30c1\u30fc\u30e0\u5185\u306e\u30b3\u30df\u30e5\u30cb\u30b1\u30fc\u30b7\u30e7\u30f3\u304c\u98db\u8e8d\u7684\u306b\u5411\u4e0a\u3057\u307e\u3059\u3002\u30a8\u30e9\u30fc\u5831\u544a\u6642\u306b\u300c\u3053\u306e\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3057\u307e\u3057\u305f\u300d\u3068\u5177\u4f53\u7684\u306a\u30ed\u30b0\u60c5\u5831\u3092\u5171\u6709\u3067\u304d\u308c\u3070\u3001\u72b6\u6cc1\u306e\u8aac\u660e\u306b\u8cbb\u3084\u3059\u6642\u9593\u3092\u524a\u6e1b\u3057\u3001\u89e3\u6c7a\u7b56\u306e\u691c\u8a0e\u306b\u3088\u308a\u591a\u304f\u306e\u6642\u9593\u3092\u5272\u304f\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-5\">\u306a\u305c\u591a\u304f\u306e\u958b\u767a\u8005\u304cerror_log\u3092\u898b\u9003\u3057\u3066\u3044\u308b\u306e\u304b<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u308c\u307b\u3069\u6709\u7528\u306a\u30c4\u30fc\u30eb\u3067\u3042\u308b\u306b\u3082\u304b\u304b\u308f\u3089\u305a\u3001\u591a\u304f\u306ePHP\u958b\u767a\u8005\u304cerror_log\u6a5f\u80fd\u3092\u5341\u5206\u306b\u6d3b\u7528\u3067\u304d\u3066\u3044\u307e\u305b\u3093\u3002\u305d\u306e\u4e3b\u306a\u7406\u7531\u306f\u4ee5\u4e0b\u306e3\u3064\u3067\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-6\">1. \u30c7\u30d5\u30a9\u30eb\u30c8\u8a2d\u5b9a\u306e\u554f\u984c<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">PHP\u306e\u30a8\u30e9\u30fc\u30ed\u30b0\u306f\u3001\u30c7\u30d5\u30a9\u30eb\u30c8\u3067\u306f\u7121\u52b9\u306b\u306a\u3063\u3066\u3044\u307e\u3059\u3002\u305d\u306e\u305f\u3081\u3001\u610f\u8b58\u7684\u306b\u8a2d\u5b9a\u3092\u5909\u66f4\u3057\u306a\u3044\u9650\u308a\u3001\u8cb4\u91cd\u306a\u30a8\u30e9\u30fc\u60c5\u5831\u304c\u5931\u308f\u308c\u3066\u3057\u307e\u3044\u307e\u3059\u3002\u307e\u305f\u3001php.ini\u306e\u8a2d\u5b9a\u304c\u9069\u5207\u3067\u306a\u3044\u3068\u3001\u30ed\u30b0\u304c\u671f\u5f85\u901a\u308a\u306b\u51fa\u529b\u3055\u308c\u306a\u3044\u30b1\u30fc\u30b9\u3082\u5c11\u306a\u304f\u3042\u308a\u307e\u305b\u3093\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-7\">2. \u8a2d\u5b9a\u306e\u8907\u96d1\u3055<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">\u958b\u767a\u8005\u304c\u30a8\u30e9\u30fc\u30ed\u30b0\u3092\u5341\u5206\u306b\u6d3b\u7528\u3067\u304d\u306a\u3044\u7406\u7531\u306e\u4e00\u3064\u306b\u3001\u305d\u306e\u898b\u304b\u3051\u306e\u8907\u96d1\u3055\u304c\u3042\u308a\u307e\u3059\u3002error_reporting\u30c7\u30a3\u30ec\u30af\u30c6\u30a3\u30d6\u306e\u30d3\u30c3\u30c8\u6f14\u7b97\u5b50\u3092\u4f7f\u3063\u305f\u8a2d\u5b9a\u3084\u3001\u74b0\u5883\u3054\u3068\u306b\u7570\u306a\u308b\u6700\u9069\u306a\u8a2d\u5b9a\u65b9\u6cd5\u306a\u3069\u3001\u521d\u5fc3\u8005\u306b\u306f\u53d6\u3063\u3064\u304d\u306b\u304f\u3044\u5074\u9762\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-8\">3. \u5373\u6642\u30d5\u30a3\u30fc\u30c9\u30d0\u30c3\u30af\u3078\u306e\u4f9d\u5b58<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">\u591a\u304f\u306e\u958b\u767a\u8005\u306fPHP\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3067\u306e\u30a8\u30e9\u30fc\u8868\u793a\u306b\u56f0\u96e3\u3092\u62b1\u3048\u3066\u304a\u308a\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u304c\u30b5\u30a4\u30ec\u30f3\u30c8\u306b\u5931\u6557\u3059\u308b\u72b6\u6cc1\u306b\u76f4\u9762\u3057\u3066\u3044\u307e\u3059\u3002\u30d6\u30e9\u30a6\u30b6\u306b\u76f4\u63a5\u8868\u793a\u3055\u308c\u308b\u30a8\u30e9\u30fc\u30e1\u30c3\u30bb\u30fc\u30b8\u306b\u4f9d\u5b58\u3059\u308b\u7fd2\u6163\u304c\u3042\u308a\u3001\u3088\u308a\u5305\u62ec\u7684\u3067\u8a73\u7d30\u306a\u30a8\u30e9\u30fc\u30ed\u30b0\u306e\u78ba\u8a8d\u3068\u3044\u3046\u7fd2\u6163\u304c\u8eab\u306b\u3064\u3044\u3066\u3044\u306a\u3044\u3053\u3068\u3082\u4e00\u56e0\u3067\u3059\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\">\n\n\n\n<p class=\"wp-block-paragraph\">PHP\u306eerror_log\u6a5f\u80fd\u306f\u3001\u9069\u5207\u306b\u8a2d\u5b9a\u30fb\u6d3b\u7528\u3059\u308c\u3070\u3001\u958b\u767a\u52b9\u7387\u3092\u5287\u7684\u306b\u5411\u4e0a\u3055\u305b\u308b\u5f37\u529b\u306a\u30c4\u30fc\u30eb\u3068\u306a\u308a\u307e\u3059\u3002\u6b21\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001error_log\u95a2\u6570\u306e\u57fa\u672c\u7684\u306a\u4ed5\u7d44\u307f\u3068\u8a2d\u5b9a\u65b9\u6cd5\u306b\u3064\u3044\u3066\u8a73\u3057\u304f\u89e3\u8aac\u3057\u307e\u3059\u3002\u9069\u5207\u306a\u30a8\u30e9\u30fc\u30ed\u30b0\u7ba1\u7406\u306e\u7b2c\u4e00\u6b69\u3092\u8e0f\u307f\u51fa\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-9\">PHP error_log\u95a2\u6570\u306e\u57fa\u672c\u3092\u7406\u89e3\u3059\u308b<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">PHP\u306eerror_log\u6a5f\u80fd\u3092\u52b9\u679c\u7684\u306b\u6d3b\u7528\u3059\u308b\u305f\u3081\u306b\u306f\u3001\u307e\u305a\u305d\u306e\u57fa\u672c\u7684\u306a\u4ed5\u7d44\u307f\u3068\u8a2d\u5b9a\u65b9\u6cd5\u3092\u7406\u89e3\u3059\u308b\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002\u3053\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001error_log\u95a2\u6570\u306e\u69cb\u6587\u304b\u3089\u5b9f\u969b\u306e\u8a2d\u5b9a\u65b9\u6cd5\u307e\u3067\u3001\u57fa\u790e\u7684\u306a\u77e5\u8b58\u3092\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-10\">error_log\u95a2\u6570\u306e\u69cb\u6587\u3068\u5f15\u6570\u306e\u8a73\u7d30\u89e3\u8aac<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">PHP\u6a19\u6e96\u306eerror_log\u95a2\u6570\u306f\u3001\u6307\u5b9a\u3057\u305f\u5834\u6240\u306b\u30a8\u30e9\u30fc\u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u8a18\u9332\u3059\u308b\u305f\u3081\u306e\u3082\u306e\u3067\u3059\u3002\u3053\u306e\u95a2\u6570\u3092\u4f7f\u3046\u3053\u3068\u3067\u3001\u958b\u767a\u8005\u306f\u72ec\u81ea\u306e\u30a8\u30e9\u30fc\u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u30ed\u30b0\u306b\u8a18\u9332\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u57fa\u672c\u7684\u306a\u69cb\u6587\u306f\u4ee5\u4e0b\u306e\u901a\u308a\u3067\u3059\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">bool error_log(\n    string $message,\n    int $message_type = 0,\n    ?string $destination = null,\n    ?string $additional_headers = null\n)\n<\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u5404\u5f15\u6570\u306e\u8a73\u7d30\u306f\u4ee5\u4e0b\u306e\u3068\u304a\u308a\u3067\u3059\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>$message<\/strong>\uff08\u5fc5\u9808\uff09\uff1a\u30ed\u30b0\u306b\u8a18\u9332\u3059\u308b\u30e1\u30c3\u30bb\u30fc\u30b8\u6587\u5b57\u5217<\/li>\n\n\n\n<li><strong>$message_type<\/strong>\uff08\u7701\u7565\u53ef\u80fd\uff09\uff1a\u30e1\u30c3\u30bb\u30fc\u30b8\u306e\u9001\u4fe1\u5148\u3092\u6307\u5b9a\u3059\u308b\u6574\u6570\u5024\n<ul class=\"wp-block-list\">\n<li>0\uff1aphp.ini\u306eerror_log\u8a2d\u5b9a\u306b\u5f93\u3046\uff08\u30c7\u30d5\u30a9\u30eb\u30c8\uff09<\/li>\n\n\n\n<li>1\uff1a\u30e1\u30fc\u30eb\u3067\u9001\u4fe1\u3059\u308b\uff08$destination\u306b\u30e1\u30fc\u30eb\u30a2\u30c9\u30ec\u30b9\u304c\u5fc5\u8981\uff09<\/li>\n\n\n\n<li>3\uff1a$destination\u3067\u6307\u5b9a\u3057\u305f\u30d5\u30a1\u30a4\u30eb\u306b\u8ffd\u52a0\u3059\u308b<\/li>\n\n\n\n<li>4\uff1aSAPI\u306e\u30a8\u30e9\u30fc\u30ed\u30b0\u30b7\u30b9\u30c6\u30e0\u306b\u9001\u4fe1\u3059\u308b<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>$destination<\/strong>\uff08\u7701\u7565\u53ef\u80fd\uff09\uff1a$message_type\u304c1\u307e\u305f\u306f3\u306e\u5834\u5408\u306b\u4f7f\u7528\u3059\u308b\u5b9b\u5148<\/li>\n\n\n\n<li><strong>$additional_headers<\/strong>\uff08\u7701\u7565\u53ef\u80fd\uff09\uff1a$message_type\u304c1\u306e\u5834\u5408\u306b\u4f7f\u7528\u3059\u308b\u8ffd\u52a0\u306e\u30e1\u30fc\u30eb\u30d8\u30c3\u30c0\u30fc<\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">\u4f7f\u7528\u4f8b\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u57fa\u672c\u7684\u306a\u4f7f\u7528\u65b9\u6cd5\uff1aphp.ini\u3067\u8a2d\u5b9a\u3055\u308c\u305f\u30ed\u30b0\u30d5\u30a1\u30a4\u30eb\u306b\u8a18\u9332\nerror_log(\"\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u63a5\u7d9a\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3057\u307e\u3057\u305f\");\n\n\/\/ \u7279\u5b9a\u306e\u30d5\u30a1\u30a4\u30eb\u306b\u30ed\u30b0\u3092\u8a18\u9332\nerror_log(\"\u91cd\u8981\u306a\u64cd\u4f5c\uff1a\u30e6\u30fc\u30b6\u30fcID 123\u304c\u30ed\u30b0\u30a4\u30f3\", 3, \"\/var\/log\/my_app_log.log\");\n\n\/\/ \u7ba1\u7406\u8005\u306b\u30e1\u30fc\u30eb\u3067\u30a8\u30e9\u30fc\u3092\u901a\u77e5\nerror_log(\"\u7dca\u6025\uff1a\u30b5\u30fc\u30d0\u30fc\u8ca0\u8377\u304c90%\u3092\u8d85\u3048\u307e\u3057\u305f\", 1, \"admin@example.com\");\n<\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">error_log\u95a2\u6570\u306f\u6210\u529f\u3057\u305f\u5834\u5408\u306btrue\u3092\u3001\u5931\u6557\u3057\u305f\u5834\u5408\u306bfalse\u3092\u8fd4\u3057\u307e\u3059\u3002\u3053\u308c\u3092\u5229\u7528\u3057\u3066\u3001\u30ed\u30b0\u306e\u8a18\u9332\u304c\u6b63\u5e38\u306b\u884c\u308f\u308c\u305f\u304b\u3092\u78ba\u8a8d\u3059\u308b\u3053\u3068\u3082\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-11\">PHP\u30a8\u30e9\u30fc\u30ec\u30d9\u30eb\u3068error_log\u306e\u95a2\u4fc2\u6027<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">PHP\u306b\u306f\u69d8\u3005\u306a\u30a8\u30e9\u30fc\u30ec\u30d9\u30eb\u304c\u3042\u308a\u3001\u305d\u308c\u305e\u308c\u91cd\u8981\u5ea6\u3084\u6027\u8cea\u304c\u7570\u306a\u308a\u307e\u3059\u3002\u3053\u308c\u3089\u306e\u30a8\u30e9\u30fc\u30ec\u30d9\u30eb\u306ferror_reporting\u95a2\u6570\u3084php.ini\u306e\u8a2d\u5b9a\u3092\u901a\u3058\u3066\u3001\u3069\u306e\u30ec\u30d9\u30eb\u306e\u30a8\u30e9\u30fc\u3092\u30ed\u30b0\u306b\u8a18\u9332\u3059\u308b\u304b\u3092\u5236\u5fa1\u3059\u308b\u305f\u3081\u306b\u4f7f\u7528\u3055\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e3b\u306a\u30a8\u30e9\u30fc\u30ec\u30d9\u30eb\u306f\u4ee5\u4e0b\u306e\u901a\u308a\u3067\u3059\uff1a<\/p>\n\n\n<div id=\"id-605ddefa-4b17-44d9-8aee-8aa6ce46ec85\">\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u30a8\u30e9\u30fc\u30ec\u30d9\u30eb<\/th><th>\u5b9a\u6570<\/th><th>\u8aac\u660e<\/th><\/tr><\/thead><tbody><tr><td>1<\/td><td>E_ERROR<\/td><td>\u81f4\u547d\u7684\u306a\u5b9f\u884c\u6642\u30a8\u30e9\u30fc\u3002\u30b9\u30af\u30ea\u30d7\u30c8\u306e\u5b9f\u884c\u304c\u505c\u6b62\u3059\u308b<\/td><\/tr><tr><td>2<\/td><td>E_WARNING<\/td><td>\u5b9f\u884c\u6642\u306e\u8b66\u544a\u3002\u30b9\u30af\u30ea\u30d7\u30c8\u306e\u5b9f\u884c\u306f\u7d99\u7d9a\u3059\u308b<\/td><\/tr><tr><td>4<\/td><td>E_PARSE<\/td><td>\u30b3\u30f3\u30d1\u30a4\u30eb\u6642\u306e\u30d1\u30fc\u30b9\u30a8\u30e9\u30fc\u3002\u69cb\u6587\u30a8\u30e9\u30fc\u306a\u3069<\/td><\/tr><tr><td>8<\/td><td>E_NOTICE<\/td><td>\u5b9f\u884c\u6642\u306e\u901a\u77e5\u3002\u6f5c\u5728\u7684\u306a\u554f\u984c\u3092\u793a\u5506\u3059\u308b\u30e1\u30c3\u30bb\u30fc\u30b8<\/td><\/tr><tr><td>256<\/td><td>E_USER_ERROR<\/td><td>\u30e6\u30fc\u30b6\u30fc\u5b9a\u7fa9\u306e\u81f4\u547d\u7684\u30a8\u30e9\u30fc<\/td><\/tr><tr><td>512<\/td><td>E_USER_WARNING<\/td><td>\u30e6\u30fc\u30b6\u30fc\u5b9a\u7fa9\u306e\u8b66\u544a<\/td><\/tr><tr><td>1024<\/td><td>E_USER_NOTICE<\/td><td>\u30e6\u30fc\u30b6\u30fc\u5b9a\u7fa9\u306e\u901a\u77e5<\/td><\/tr><tr><td>32767<\/td><td>E_ALL<\/td><td>\u30b5\u30dd\u30fc\u30c8\u3055\u308c\u3066\u3044\u308b\u3059\u3079\u3066\u306e\u30a8\u30e9\u30fc\u3068\u8b66\u544a<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div>\n\n\n<p class=\"wp-block-paragraph\">\u3053\u308c\u3089\u306e\u30a8\u30e9\u30fc\u30ec\u30d9\u30eb\u306f\u3001\u30d3\u30c3\u30c8\u6f14\u7b97\u5b50\u3092\u4f7f\u3063\u3066\u7d44\u307f\u5408\u308f\u305b\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u4f8b\u3048\u3070\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u5168\u3066\u306e\u30a8\u30e9\u30fc\u3092\u5831\u544a\u3059\u308b\uff08E_STRICT\u4ee5\u5916\uff09\nerror_reporting(E_ALL);\n\n\/\/ \u5168\u3066\u306e\u30a8\u30e9\u30fc\u3092\u5831\u544a\u3059\u308b\u304c\u3001\u901a\u77e5\u306f\u9664\u5916\nerror_reporting(E_ALL &amp; ~E_NOTICE);\n\n\/\/ \u81f4\u547d\u7684\u306a\u30a8\u30e9\u30fc\u3068\u8b66\u544a\u306e\u307f\u3092\u5831\u544a\nerror_reporting(E_ERROR | E_WARNING);\n<\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">PHP\u30a8\u30f3\u30b8\u30f3\u306f\u81ea\u52d5\u7684\u306b\u30a8\u30e9\u30fc\u3092\u691c\u51fa\u3057\u3066\u30ed\u30b0\u306b\u8a18\u9332\u3057\u307e\u3059\u304c\u3001\u958b\u767a\u8005\u306f\u72ec\u81ea\u306berror_log\u95a2\u6570\u3092\u4f7f\u7528\u3057\u3066\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u56fa\u6709\u306e\u30a8\u30e9\u30fc\u3084\u72b6\u614b\u3092\u8a18\u9332\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-12\">php.ini\u3067\u306e\u30a8\u30e9\u30fc\u30ed\u30b0\u8a2d\u5b9a\u306e\u91cd\u8981\u6027<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u30a8\u30e9\u30fc\u30ed\u30b0\u306e\u52d5\u4f5c\u306fphp.ini\u30d5\u30a1\u30a4\u30eb\u3067\u8a2d\u5b9a\u3055\u308c\u3001\u4ee5\u4e0b\u306e\u4e3b\u8981\u306a\u30c7\u30a3\u30ec\u30af\u30c6\u30a3\u30d6\u304c\u95a2\u4fc2\u3057\u307e\u3059\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>error_reporting<\/strong>\uff1a\u8a18\u9332\u3059\u308b\u30a8\u30e9\u30fc\u306e\u30ec\u30d9\u30eb\u3092\u6307\u5b9a<br><code>error_reporting = E_ALL<\/code><\/li>\n\n\n\n<li><strong>log_errors<\/strong>\uff1a\u30a8\u30e9\u30fc\u3092\u30ed\u30b0\u306b\u8a18\u9332\u3059\u308b\u304b\u3069\u3046\u304b\u3092\u6307\u5b9a<br><code>log_errors = On<\/code><\/li>\n\n\n\n<li><strong>error_log<\/strong>\uff1a\u30a8\u30e9\u30fc\u30ed\u30b0\u30d5\u30a1\u30a4\u30eb\u306e\u30d1\u30b9\u3092\u6307\u5b9a<br><code>error_log = \/var\/log\/php_errors.log<\/code><\/li>\n\n\n\n<li><strong>display_errors<\/strong>\uff1a\u30a8\u30e9\u30fc\u3092\u753b\u9762\u306b\u8868\u793a\u3059\u308b\u304b\u3069\u3046\u304b\u3092\u6307\u5b9a<br><code>display_errors = Off # \u672c\u756a\u74b0\u5883\u3067\u306f\u30aa\u30d5\u306b\u3059\u308b\u3079\u304d<\/code><\/li>\n\n\n\n<li><strong>display_startup_errors<\/strong>\uff1a\u8d77\u52d5\u6642\u306e\u30a8\u30e9\u30fc\u3092\u8868\u793a\u3059\u308b\u304b\u3069\u3046\u304b\u3092\u6307\u5b9a<br><code>display_startup_errors = Off<\/code><\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u308c\u3089\u306e\u8a2d\u5b9a\u306f\u3001\u958b\u767a\u74b0\u5883\u3068\u672c\u756a\u74b0\u5883\u3067\u7570\u306a\u308b\u69cb\u6210\u306b\u3059\u308b\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002\u4e00\u822c\u7684\u306b\u306f\u3001\u958b\u767a\u74b0\u5883\u3067\u306f\u30a8\u30e9\u30fc\u3092\u753b\u9762\u306b\u8868\u793a\u3057\uff08display_errors = On\uff09\u3001\u672c\u756a\u74b0\u5883\u3067\u306f\u753b\u9762\u8868\u793a\u3092\u30aa\u30d5\u306b\u3057\u3066\u30ed\u30b0\u30d5\u30a1\u30a4\u30eb\u306b\u306e\u307f\u8a18\u9332\u3059\u308b\uff08display_errors = Off, log_errors = On\uff09\u3068\u3044\u3046\u69cb\u6210\u304c\u63a8\u5968\u3055\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">PHP\u306e\u8a2d\u5b9a\u30d5\u30a1\u30a4\u30eb\u306e\u5834\u6240\u306f\u30b7\u30b9\u30c6\u30e0\u306b\u3088\u3063\u3066\u7570\u306a\u308a\u307e\u3059\u304c\u3001\u4e3b\u306a\u5834\u6240\u306f\u4ee5\u4e0b\u306e\u901a\u308a\u3067\u3059\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Linux (Debian\/Ubuntu): <code>\/etc\/php\/7.4\/apache2\/php.ini<\/code>\uff08Apache\u306e\u5834\u5408\uff09<\/li>\n\n\n\n<li>Linux (CentOS\/RHEL): <code>\/etc\/php.ini<\/code><\/li>\n\n\n\n<li>Windows: <code>C:\\php\\php.ini<\/code><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">php.ini\u8a2d\u5b9a\u3092\u5909\u66f4\u3057\u305f\u5834\u5408\u306f\u3001Web\u30b5\u30fc\u30d0\u30fc\uff08Apache, Nginx\u306a\u3069\uff09\u306e\u518d\u8d77\u52d5\u304c\u5fc5\u8981\u3067\u3059\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\">\n\n\n\n<p class=\"wp-block-paragraph\">\u30a8\u30e9\u30fc\u30ed\u30b0\u6a5f\u80fd\u306e\u57fa\u672c\u3092\u7406\u89e3\u3057\u305f\u3068\u3053\u308d\u3067\u3001\u6b21\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u5b9f\u969b\u306berror_log\u95a2\u6570\u3092\u4f7f\u3063\u305f\u57fa\u672c\u7684\u306a\u5b9f\u88c5\u4f8b\u3092\u898b\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002\u3055\u307e\u3056\u307e\u306a\u30b7\u30ca\u30ea\u30aa\u3067\u306eerror_log\u6d3b\u7528\u6cd5\u3092\u7fd2\u5f97\u3059\u308b\u3053\u3068\u3067\u3001PHP\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u958b\u767a\u306e\u52b9\u7387\u3068\u54c1\u8cea\u3092\u9ad8\u3081\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-13\">\u4eca\u3059\u3050\u4f7f\u3048\u308b\uff01PHP error_log\u306e\u57fa\u672c\u7684\u306a\u4f7f\u3044\u65b9<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u3053\u304b\u3089\u306f\u3001\u5b9f\u969b\u306bPHP error_log\u95a2\u6570\u3092\u4f7f\u3063\u305f\u5177\u4f53\u7684\u306a\u5b9f\u88c5\u4f8b\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002\u57fa\u672c\u7684\u306a\u4f7f\u3044\u65b9\u3092\u30de\u30b9\u30bf\u30fc\u3059\u308b\u3053\u3068\u3067\u3001\u65e5\u3005\u306e\u958b\u767a\u4f5c\u696d\u306b\u304a\u3051\u308b\u554f\u984c\u89e3\u6c7a\u304c\u683c\u6bb5\u306b\u52b9\u7387\u5316\u3055\u308c\u308b\u3067\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-14\">\u30b7\u30f3\u30d7\u30eb\u306a\u30a8\u30e9\u30fc\u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u30ed\u30b0\u306b\u8a18\u9332\u3059\u308b\u65b9\u6cd5<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u307e\u305a\u306f\u3001\u6700\u3082\u57fa\u672c\u7684\u306aerror_log\u95a2\u6570\u306e\u4f7f\u3044\u65b9\u304b\u3089\u898b\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002\u30b7\u30f3\u30d7\u30eb\u306a\u30c6\u30ad\u30b9\u30c8\u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u30ed\u30b0\u306b\u8a18\u9332\u3059\u308b\u65b9\u6cd5\u3067\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">&lt;?php\n\/\/ \u57fa\u672c\u7684\u306a\u30a8\u30e9\u30fc\u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u30ed\u30b0\u306b\u8a18\u9332\nerror_log(\"\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u63a5\u7d9a\u306b\u5931\u6557\u3057\u307e\u3057\u305f\");\n\n\/\/ \u30bf\u30a4\u30e0\u30b9\u30bf\u30f3\u30d7\u3092\u542b\u3081\u305f\u30e1\u30c3\u30bb\u30fc\u30b8\nerror_log(date('Y-m-d H:i:s') . \": \u30e6\u30fc\u30b6\u30fc\u8a8d\u8a3c\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3057\u307e\u3057\u305f\");\n\n\/\/ \u30a8\u30e9\u30fc\u60c5\u5831\u3092\u542b\u3081\u305f\u30e1\u30c3\u30bb\u30fc\u30b8\n$errno = 1045;\n$error = \"Access denied for user 'username'@'localhost'\";\nerror_log(\"MySQL\u30a8\u30e9\u30fc[$errno]: $error\");\n<\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u308c\u3089\u306e\u30b3\u30fc\u30c9\u3092\u5b9f\u884c\u3059\u308b\u3068\u3001php.ini\u3067\u8a2d\u5b9a\u3055\u308c\u305f\u30ed\u30b0\u30d5\u30a1\u30a4\u30eb\uff08\u901a\u5e38\u306f <code>\/var\/log\/php_errors.log<\/code> \u3084 <code>\/var\/log\/apache2\/error.log<\/code> \u306a\u3069\uff09\u306b\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u30ed\u30b0\u304c\u8a18\u9332\u3055\u308c\u307e\u3059\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">[23-Apr-2025 10:15:30 Asia\/Tokyo] \u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u63a5\u7d9a\u306b\u5931\u6557\u3057\u307e\u3057\u305f\n[23-Apr-2025 10:15:30 Asia\/Tokyo] 2025-04-23 10:15:30: \u30e6\u30fc\u30b6\u30fc\u8a8d\u8a3c\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3057\u307e\u3057\u305f\n[23-Apr-2025 10:15:30 Asia\/Tokyo] MySQL\u30a8\u30e9\u30fc[1045]: Access denied for user 'username'@'localhost'\n<\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u7279\u5b9a\u306e\u30d5\u30a1\u30a4\u30eb\u306b\u30ed\u30b0\u3092\u51fa\u529b\u3057\u305f\u3044\u5834\u5408\u306f\u3001\u7b2c2\u5f15\u6570\u306b <code>3<\/code>\u3001\u7b2c3\u5f15\u6570\u306b\u30d5\u30a1\u30a4\u30eb\u30d1\u30b9\u3092\u6307\u5b9a\u3057\u307e\u3059\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">&lt;?php\n\/\/ \u7279\u5b9a\u306e\u30d5\u30a1\u30a4\u30eb\u306b\u30ed\u30b0\u3092\u8a18\u9332\nerror_log(\"\u91cd\u8981\u306a\u30b7\u30b9\u30c6\u30e0\u64cd\u4f5c\u304c\u5b9f\u884c\u3055\u308c\u307e\u3057\u305f\", 3, \"\/var\/log\/my_app\/system.log\");\n\n\/\/ \u30ed\u30b0\u30d5\u30a1\u30a4\u30eb\u304c\u5b58\u5728\u3057\u306a\u3044\u5834\u5408\u306f\u81ea\u52d5\u7684\u306b\u4f5c\u6210\u3055\u308c\u308b\uff08\u66f8\u304d\u8fbc\u307f\u6a29\u9650\u304c\u3042\u308c\u3070\uff09\nerror_log(\"\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u8d77\u52d5\", 3, __DIR__ . \"\/app.log\");\n<\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u307e\u305f\u3001\u7dca\u6025\u6642\u306b\u306f\u30e1\u30fc\u30eb\u3067\u30a8\u30e9\u30fc\u3092\u901a\u77e5\u3059\u308b\u3053\u3068\u3082\u3067\u304d\u307e\u3059\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">&lt;?php\n\/\/ \u30e1\u30fc\u30eb\u3067\u30a8\u30e9\u30fc\u3092\u901a\u77e5\nerror_log(\"\u30af\u30ea\u30c6\u30a3\u30ab\u30eb\u30a8\u30e9\u30fc: \u652f\u6255\u3044\u51e6\u7406\u304c\u5931\u6557\u3057\u307e\u3057\u305f\", 1, \"admin@example.com\");\n\n\/\/ \u8ffd\u52a0\u306e\u30d8\u30c3\u30c0\u30fc\u3092\u6307\u5b9a\u3057\u3066\u30e1\u30fc\u30eb\u3092\u9001\u4fe1\nerror_log(\"\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u8b66\u544a: \u8907\u6570\u56de\u306e\u4e0d\u6b63\u30ed\u30b0\u30a4\u30f3\u8a66\u884c\u3092\u691c\u51fa\", 1, \n          \"security@example.com\", \"From: system@example.com\\r\\nCc: dev@example.com\");\n<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-15\">\u5909\u6570\u306e\u5185\u5bb9\u3068\u30c7\u30fc\u30bf\u578b\u3092\u52b9\u679c\u7684\u306b\u30ed\u30b0\u51fa\u529b\u3059\u308b\u30c6\u30af\u30cb\u30c3\u30af<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u30c7\u30d0\u30c3\u30b0\u3067\u306f\u3001\u5358\u7d14\u306a\u30e1\u30c3\u30bb\u30fc\u30b8\u3060\u3051\u3067\u306a\u304f\u5909\u6570\u306e\u5185\u5bb9\u3084\u578b\u3092\u78ba\u8a8d\u3059\u308b\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002\u4ee5\u4e0b\u306b\u3001\u5909\u6570\u306e\u5185\u5bb9\u3092\u52b9\u679c\u7684\u306b\u30ed\u30b0\u51fa\u529b\u3059\u308b\u30c6\u30af\u30cb\u30c3\u30af\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">&lt;?php\n\/\/ \u5909\u6570\u306e\u5024\u3092\u30ed\u30b0\u306b\u8a18\u9332\n$username = \"yamada_taro\";\n$user_id = 12345;\nerror_log(\"\u30e6\u30fc\u30b6\u30fc\u60c5\u5831: ID=$user_id, \u540d\u524d=$username\");\n\n\/\/ \u5909\u6570\u306e\u578b\u3082\u542b\u3081\u3066\u30ed\u30b0\u51fa\u529b\n$data = 42;\nerror_log(\"\u30c7\u30fc\u30bf\u5024: \" . $data . \" (\u578b: \" . gettype($data) . \")\");\n\n\/\/ var_export \u3092\u4f7f\u3063\u305f\u8a73\u7d30\u306a\u5909\u6570\u60c5\u5831\u306e\u30ed\u30b0\u51fa\u529b\n$config = [\n    'db_host' =&gt; 'localhost',\n    'db_user' =&gt; 'app_user',\n    'debug_mode' =&gt; true\n];\nerror_log(\"\u8a2d\u5b9a\u60c5\u5831: \" . var_export($config, true));\n<\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e0a\u8a18\u306e\u30b3\u30fc\u30c9\u3092\u5b9f\u884c\u3059\u308b\u3068\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u30ed\u30b0\u304c\u8a18\u9332\u3055\u308c\u307e\u3059\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">[23-Apr-2025 10:20:45 Asia\/Tokyo] \u30e6\u30fc\u30b6\u30fc\u60c5\u5831: ID=12345, \u540d\u524d=yamada_taro\n[23-Apr-2025 10:20:45 Asia\/Tokyo] \u30c7\u30fc\u30bf\u5024: 42 (\u578b: integer)\n[23-Apr-2025 10:20:45 Asia\/Tokyo] \u8a2d\u5b9a\u60c5\u5831: array (\n  'db_host' =&gt; 'localhost',\n  'db_user' =&gt; 'app_user',\n  'debug_mode' =&gt; true,\n)\n<\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u5909\u6570\u306e\u51fa\u529b\u306b\u306f\u3001\u4e3b\u306b\u4ee5\u4e0b\u306e3\u3064\u306e\u95a2\u6570\u304c\u4f7f\u308f\u308c\u307e\u3059\uff1a<\/p>\n\n\n<div id=\"id-b7784dfe-bbf0-4896-bacd-8ea6e8aac52f\">\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u95a2\u6570<\/th><th>\u7279\u5fb4<\/th><th>\u4f7f\u7528\u4f8b<\/th><\/tr><\/thead><tbody><tr><td><code>var_export()<\/code><\/td><td>PHP\u69cb\u6587\u3067\u8a55\u4fa1\u53ef\u80fd\u306a\u5f62\u5f0f\u3067\u51fa\u529b<\/td><td><code>error_log(var_export($var, true));<\/code><\/td><\/tr><tr><td><code>print_r()<\/code><\/td><td>\u8aad\u307f\u3084\u3059\u3044\u5f62\u5f0f\u3067\u51fa\u529b\u3059\u308b\u304c\u3001\u5168\u3066\u306e\u578b\u60c5\u5831\u306f\u542b\u307e\u306a\u3044<\/td><td><code>error_log(print_r($var, true));<\/code><\/td><\/tr><tr><td><code>var_dump()<\/code><\/td><td>\u578b\u60c5\u5831\u3068\u8a73\u7d30\u306a\u5185\u5bb9\u3092\u51fa\u529b\u3059\u308b\u304c\u3001\u76f4\u63a5\u30ad\u30e3\u30d7\u30c1\u30e3\u3067\u304d\u306a\u3044<\/td><td><code>ob_start(); var_dump($var); error_log(ob_get_clean());<\/code><\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div>\n\n\n<p class=\"wp-block-paragraph\">\u5b9f\u52d9\u3067\u306f\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u30d8\u30eb\u30d1\u30fc\u95a2\u6570\u3092\u4f5c\u6210\u3057\u3066\u304a\u304f\u3068\u4fbf\u5229\u3067\u3059\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">&lt;?php\n\/**\n * \u5909\u6570\u306e\u5185\u5bb9\u3092\u8a73\u7d30\u306b\u30ed\u30b0\u51fa\u529b\u3059\u308b\u30d8\u30eb\u30d1\u30fc\u95a2\u6570\n * @param mixed $var \u30ed\u30b0\u51fa\u529b\u3059\u308b\u5909\u6570\n * @param string $label \u5909\u6570\u306e\u30e9\u30d9\u30eb\uff08\u30aa\u30d7\u30b7\u30e7\u30f3\uff09\n * @return void\n *\/\nfunction log_debug($var, $label = null) {\n    $output = ($label !== null ? \"$label: \" : \"\") . var_export($var, true);\n    error_log($output);\n}\n\n\/\/ \u4f7f\u7528\u4f8b\n$user = ['id' =&gt; 1, 'name' =&gt; '\u5c71\u7530\u592a\u90ce', 'active' =&gt; true];\nlog_debug($user, '\u30e6\u30fc\u30b6\u30fc\u30c7\u30fc\u30bf');\n<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-16\">\u8907\u96d1\u306a\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3084\u914d\u5217\u3092\u30ed\u30b0\u306b\u8a18\u9332\u3059\u308b\u969b\u306e\u6ce8\u610f\u70b9<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u8907\u96d1\u306a\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3084\u914d\u5217\u3092\u30ed\u30b0\u306b\u8a18\u9332\u3059\u308b\u5834\u5408\u3001\u3044\u304f\u3064\u304b\u306e\u6ce8\u610f\u70b9\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-17\">1. JSON\u5f62\u5f0f\u3067\u306e\u51fa\u529b<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">\u5927\u304d\u306a\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3084\u914d\u5217\u306f\u3001JSON\u5f62\u5f0f\u3067\u51fa\u529b\u3059\u308b\u3068\u8aad\u307f\u3084\u3059\u304f\u3001\u5f8c\u304b\u3089\u89e3\u6790\u3057\u3084\u3059\u304f\u306a\u308a\u307e\u3059\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">&lt;?php\n$complex_data = [\n    'user' =&gt; [\n        'id' =&gt; 1001,\n        'name' =&gt; '\u4f50\u85e4\u82b1\u5b50',\n        'roles' =&gt; ['admin', 'editor'],\n        'settings' =&gt; [\n            'theme' =&gt; 'dark',\n            'notifications' =&gt; true\n        ]\n    ],\n    'session' =&gt; [\n        'id' =&gt; 'sess_12345abc',\n        'expires' =&gt; '2025-04-24 10:30:00'\n    ]\n];\n\n\/\/ JSON\u5f62\u5f0f\u3067\u30ed\u30b0\u51fa\u529b\nerror_log(\"\u30bb\u30c3\u30b7\u30e7\u30f3\u30c7\u30fc\u30bf: \" . json_encode($complex_data, JSON_PRETTY_PRINT | JSON_UNESCAPED_UNICODE));\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-18\">2. \u5faa\u74b0\u53c2\u7167\u306e\u51e6\u7406<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u9593\u306b\u5faa\u74b0\u53c2\u7167\u304c\u3042\u308b\u5834\u5408\u3001\u5358\u7d14\u306bvar_export\u3084json_encode\u3092\u4f7f\u3046\u3068\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3057\u307e\u3059\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">&lt;?php\n$a = new stdClass();\n$b = new stdClass();\n$a-&gt;child = $b;\n$b-&gt;parent = $a;  \/\/ \u5faa\u74b0\u53c2\u7167\n\n\/\/ \u30a8\u30e9\u30fc\u304c\u767a\u751f\u3059\u308b\n\/\/ error_log(var_export($a, true));  \/\/ Fatal error: Nesting level too deep\n\n\/\/ \u5bfe\u7b561: JSON_PARTIAL_OUTPUT_ON_ERROR \u30d5\u30e9\u30b0\u3092\u4f7f\u7528\nerror_log(\"\u5faa\u74b0\u53c2\u7167\u30aa\u30d6\u30b8\u30a7\u30af\u30c8: \" . json_encode($a, JSON_PARTIAL_OUTPUT_ON_ERROR));\n\n\/\/ \u5bfe\u7b562: \u518d\u5e30\u7684\u306b\u51e6\u7406\u3059\u308b\u72ec\u81ea\u95a2\u6570\u3092\u4f5c\u6210\nfunction safe_log_object($obj, $max_depth = 3, $depth = 0) {\n    if ($depth &gt;= $max_depth) {\n        return \"[\u6700\u5927\u6df1\u5ea6\u306b\u9054\u3057\u307e\u3057\u305f]\";\n    }\n    \n    if (is_array($obj) || is_object($obj)) {\n        $result = [];\n        foreach ((array)$obj as $key =&gt; $value) {\n            $result[$key] = is_array($value) || is_object($value) \n                ? safe_log_object($value, $max_depth, $depth + 1)\n                : $value;\n        }\n        return $result;\n    }\n    \n    return $obj;\n}\n\n$safe_data = safe_log_object($a);\nerror_log(\"\u5b89\u5168\u306a\u51fa\u529b: \" . json_encode($safe_data));\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-19\">3. \u5927\u304d\u306a\u30c7\u30fc\u30bf\u306e\u5206\u5272<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">\u30ed\u30b0\u30d5\u30a1\u30a4\u30eb\u306e\u53ef\u8aad\u6027\u3092\u9ad8\u3081\u308b\u305f\u3081\u306b\u3001\u975e\u5e38\u306b\u5927\u304d\u306a\u30c7\u30fc\u30bf\u69cb\u9020\u306f\u5206\u5272\u3057\u3066\u30ed\u30b0\u51fa\u529b\u3059\u308b\u3053\u3068\u3092\u691c\u8a0e\u3057\u307e\u3057\u3087\u3046\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">&lt;?php\n$large_data = [\/* \u5927\u91cf\u306e\u30c7\u30fc\u30bf *\/];\n\n\/\/ \u30ad\u30fc\u3054\u3068\u306b\u5206\u5272\u3057\u3066\u30ed\u30b0\u51fa\u529b\nforeach ($large_data as $key =&gt; $value) {\n    error_log(\"\u5927\u304d\u306a\u30c7\u30fc\u30bf\u306e\u90e8\u5206 [{$key}]: \" . json_encode($value));\n}\n<\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u4ee5\u4e0a\u306e\u30c6\u30af\u30cb\u30c3\u30af\u3092\u6d3b\u7528\u3059\u308b\u3053\u3068\u3067\u3001PHP\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u30c7\u30d0\u30c3\u30b0\u52b9\u7387\u304c\u5927\u5e45\u306b\u5411\u4e0a\u3057\u307e\u3059\u3002\u6b21\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001\u3055\u3089\u306b\u9ad8\u5ea6\u306aerror_log\u6d3b\u7528\u30c6\u30af\u30cb\u30c3\u30af\u3092\u7d39\u4ecb\u3057\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-20\">\u958b\u767a\u52b9\u7387\u3092\u4e0a\u3052\u308bPHP error_log\u6d3b\u7528\u30c6\u30af\u30cb\u30c3\u30af<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u57fa\u672c\u7684\u306a\u4f7f\u3044\u65b9\u3092\u7406\u89e3\u3057\u305f\u3068\u3053\u308d\u3067\u3001\u3055\u3089\u306b\u958b\u767a\u52b9\u7387\u3092\u9ad8\u3081\u308b\u305f\u3081\u306eerror_log\u6d3b\u7528\u30c6\u30af\u30cb\u30c3\u30af\u3092\u898b\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002\u3053\u308c\u3089\u306e\u30c6\u30af\u30cb\u30c3\u30af\u3092\u7fd2\u5f97\u3059\u308b\u3053\u3068\u3067\u3001\u30c7\u30d0\u30c3\u30b0\u4f5c\u696d\u306e\u8cea\u304c\u5411\u4e0a\u3057\u3001\u554f\u984c\u89e3\u6c7a\u306e\u30b9\u30d4\u30fc\u30c9\u304c\u683c\u6bb5\u306b\u4e0a\u304c\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-21\">\u30c7\u30d0\u30c3\u30b0\u60c5\u5831\u3092\u69cb\u9020\u5316\u3057\u3066\u8a18\u9332\u3059\u308b\u305f\u3081\u306e\u5de5\u592b<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u52b9\u7387\u7684\u306a\u30c7\u30d0\u30c3\u30b0\u306e\u305f\u3081\u306b\u306f\u3001\u30ed\u30b0\u60c5\u5831\u3092\u69cb\u9020\u5316\u3057\u3066\u8a18\u9332\u3059\u308b\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002\u4ee5\u4e0b\u306b\u3001\u5b9f\u52d9\u3067\u5f79\u7acb\u3064\u30c6\u30af\u30cb\u30c3\u30af\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-22\">JSON\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u3067\u306e\u30ed\u30b0\u51fa\u529b<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">JSON\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u3067\u30ed\u30b0\u3092\u51fa\u529b\u3059\u308b\u3068\u3001\u6a5f\u68b0\u7684\u306a\u89e3\u6790\u304c\u5bb9\u6613\u306b\u306a\u308a\u3001\u30ed\u30b0\u5206\u6790\u30c4\u30fc\u30eb\u3068\u306e\u9023\u643a\u3082\u30b9\u30e0\u30fc\u30ba\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">&lt;?php\n\/**\n * \u69cb\u9020\u5316\u3055\u308c\u305fJSON\u30ed\u30b0\u3092\u51fa\u529b\u3059\u308b\u95a2\u6570\n *\/\nfunction log_structured($message, $level = 'INFO', $context = []) {\n    $log_data = [\n        'timestamp' =&gt; date('Y-m-d H:i:s'),\n        'level' =&gt; $level,\n        'message' =&gt; $message,\n        'context' =&gt; $context\n    ];\n    \n    error_log(json_encode($log_data, JSON_UNESCAPED_UNICODE));\n}\n\n\/\/ \u4f7f\u7528\u4f8b\nlog_structured(\n    \"\u30e6\u30fc\u30b6\u30fc\u304c\u30ed\u30b0\u30a4\u30f3\u306b\u5931\u6557\u3057\u307e\u3057\u305f\", \n    \"WARNING\", \n    [\n        'user_id' =&gt; 12345,\n        'ip_address' =&gt; '192.168.1.100',\n        'attempt_count' =&gt; 3\n    ]\n);\n<\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u51fa\u529b\u4f8b\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">[23-Apr-2025 10:45:30 Asia\/Tokyo] {\"timestamp\":\"2025-04-23 10:45:30\",\"level\":\"WARNING\",\"message\":\"\u30e6\u30fc\u30b6\u30fc\u304c\u30ed\u30b0\u30a4\u30f3\u306b\u5931\u6557\u3057\u307e\u3057\u305f\",\"context\":{\"user_id\":12345,\"ip_address\":\"192.168.1.100\",\"attempt_count\":3}}\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-23\">\u30ea\u30af\u30a8\u30b9\u30c8\u60c5\u5831\u306e\u81ea\u52d5\u4ed8\u52a0<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">\u30c7\u30d0\u30c3\u30b0\u3092\u52b9\u7387\u5316\u3059\u308b\u306b\u306f\u3001\u5404\u30ed\u30b0\u30a8\u30f3\u30c8\u30ea\u306b\u30ea\u30af\u30a8\u30b9\u30c8\u60c5\u5831\u3092\u81ea\u52d5\u7684\u306b\u4ed8\u52a0\u3059\u308b\u3068\u4fbf\u5229\u3067\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">&lt;?php\n\/**\n * \u30ea\u30af\u30a8\u30b9\u30c8\u60c5\u5831\u3092\u81ea\u52d5\u4ed8\u52a0\u3059\u308b\u30ed\u30b0\u95a2\u6570\n *\/\nfunction log_with_request_info($message, $level = 'INFO') {\n    $request_info = [\n        'url' =&gt; $_SERVER['REQUEST_URI'] ?? 'CLI',\n        'method' =&gt; $_SERVER['REQUEST_METHOD'] ?? 'N\/A',\n        'ip' =&gt; $_SERVER['REMOTE_ADDR'] ?? '127.0.0.1',\n        'user_agent' =&gt; $_SERVER['HTTP_USER_AGENT'] ?? 'N\/A',\n        'session_id' =&gt; session_id() ?: 'No session',\n        'request_id' =&gt; uniqid()\n    ];\n    \n    $log_entry = [\n        'timestamp' =&gt; date('Y-m-d H:i:s'),\n        'level' =&gt; $level,\n        'message' =&gt; $message,\n        'request' =&gt; $request_info\n    ];\n    \n    error_log(json_encode($log_entry, JSON_UNESCAPED_UNICODE));\n    return $log_entry['request']['request_id']; \/\/ \u30ea\u30af\u30a8\u30b9\u30c8ID\u3092\u8fd4\u3059\uff08\u969c\u5bb3\u8ffd\u8de1\u7528\uff09\n}\n\n\/\/ \u4f7f\u7528\u4f8b\n$request_id = log_with_request_info(\"\u30da\u30fc\u30b8\u30a2\u30af\u30bb\u30b9\u958b\u59cb\");\n\/\/ ... \u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u30ed\u30b8\u30c3\u30af ...\nlog_with_request_info(\"\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u30af\u30a8\u30ea\u5b9f\u884c: SELECT * FROM users\");\n<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-24\">\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u8a08\u6e2c\u306berror_log\u3092\u6d3b\u7528\u3059\u308b\u65b9\u6cd5<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u76e3\u8996\u30fb\u6539\u5584\u3059\u308b\u305f\u3081\u306b\u3001error_log\u3092\u6d3b\u7528\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-25\">\u51e6\u7406\u6642\u9593\u306e\u8a08\u6e2c<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">\u91cd\u8981\u306a\u51e6\u7406\u306e\u5b9f\u884c\u6642\u9593\u3092\u8a08\u6e2c\u3057\u3066\u30ed\u30b0\u306b\u8a18\u9332\u3059\u308b\u3053\u3068\u3067\u3001\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306e\u30dc\u30c8\u30eb\u30cd\u30c3\u30af\u3092\u7279\u5b9a\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">&lt;?php\n\/**\n * \u51e6\u7406\u6642\u9593\u3092\u8a08\u6e2c\u3057\u3066\u30ed\u30b0\u306b\u8a18\u9332\u3059\u308b\u95a2\u6570\n *\/\nfunction log_execution_time($callback, $label = 'Process') {\n    $start_time = microtime(true);\n    $result = $callback();\n    $execution_time = microtime(true) - $start_time;\n    \n    error_log(sprintf(\n        \"%s completed in %.4f seconds\", \n        $label, \n        $execution_time\n    ));\n    \n    return $result;\n}\n\n\/\/ \u4f7f\u7528\u4f8b\n$users = log_execution_time(function() {\n    \/\/ \u91cd\u3044\u51e6\u7406\uff08\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u30af\u30a8\u30ea\u306a\u3069\uff09\n    $result = [];\n    for ($i = 0; $i &lt; 1000; $i++) {\n        $result[] = ['id' =&gt; $i, 'name' =&gt; \"\u30e6\u30fc\u30b6\u30fc$i\"];\n    }\n    sleep(1); \/\/ \u51e6\u7406\u306b\u6642\u9593\u304c\u304b\u304b\u308b\u3068\u4eee\u5b9a\n    return $result;\n}, '\u30e6\u30fc\u30b6\u30fc\u30c7\u30fc\u30bf\u53d6\u5f97');\n\n\/\/ \u307e\u305f\u306f\u3001\u65e2\u5b58\u306e\u30b3\u30fc\u30c9\u3092\u8a08\u6e2c\u3059\u308b\u5834\u5408\n$start = microtime(true);\nexpensive_function();\nerror_log(sprintf(\"expensive_function\u306e\u5b9f\u884c\u6642\u9593: %.4f\u79d2\", microtime(true) - $start));\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-26\">\u30e1\u30e2\u30ea\u4f7f\u7528\u91cf\u306e\u76e3\u8996<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">\u30e1\u30e2\u30ea\u3092\u5927\u91cf\u306b\u4f7f\u7528\u3059\u308b\u51e6\u7406\u3092\u7279\u5b9a\u3059\u308b\u305f\u3081\u306b\u3001\u30e1\u30e2\u30ea\u4f7f\u7528\u91cf\u3092\u30ed\u30b0\u306b\u8a18\u9332\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">&lt;?php\n\/**\n * \u30e1\u30e2\u30ea\u4f7f\u7528\u91cf\u3092\u30ed\u30b0\u306b\u8a18\u9332\u3059\u308b\u95a2\u6570\n *\/\nfunction log_memory_usage($marker = '') {\n    $memory_usage = memory_get_usage(true) \/ 1024 \/ 1024; \/\/ MB\u5358\u4f4d\n    $peak_usage = memory_get_peak_usage(true) \/ 1024 \/ 1024; \/\/ MB\u5358\u4f4d\n    \n    error_log(sprintf(\n        \"\u30e1\u30e2\u30ea\u4f7f\u7528\u91cf %s: \u73fe\u5728=%.2f MB, \u30d4\u30fc\u30af=%.2f MB\",\n        $marker ? \"($marker)\" : \"\",\n        $memory_usage,\n        $peak_usage\n    ));\n}\n\n\/\/ \u4f7f\u7528\u4f8b\nlog_memory_usage(\"\u51e6\u7406\u958b\u59cb\u524d\");\n$large_array = [];\nfor ($i = 0; $i &lt; 100000; $i++) {\n    $large_array[] = \"\u30c7\u30fc\u30bf\" . $i;\n}\nlog_memory_usage(\"\u5927\u304d\u306a\u914d\u5217\u4f5c\u6210\u5f8c\");\nunset($large_array);\nlog_memory_usage(\"\u914d\u5217\u89e3\u653e\u5f8c\");\n<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-27\">\u30a8\u30e9\u30fc\u306e\u91cd\u8981\u5ea6\u306b\u5fdc\u3058\u305f\u30ed\u30b0\u51fa\u529b\u306e\u4f7f\u3044\u5206\u3051<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u52b9\u7387\u7684\u306a\u30c7\u30d0\u30c3\u30b0\u306e\u305f\u3081\u306b\u3001\u30a8\u30e9\u30fc\u306e\u91cd\u8981\u5ea6\u306b\u5fdc\u3058\u3066\u30ed\u30b0\u306e\u8a73\u7d30\u5ea6\u3092\u8abf\u6574\u3059\u308b\u65b9\u6cd5\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-28\">\u30ab\u30b9\u30bf\u30e0\u30ed\u30b0\u30ec\u30d9\u30eb\u306e\u5b9f\u88c5<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">PSR-3\u4e92\u63db\u306e\u30ed\u30b0\u30ec\u30d9\u30eb\u3092\u5b9f\u88c5\u3059\u308b\u3053\u3068\u3067\u3001\u6a19\u6e96\u7684\u306a\u30ed\u30b0\u30ec\u30d9\u30eb\u306b\u57fa\u3065\u3044\u305f\u30ed\u30b0\u51fa\u529b\u304c\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">&lt;?php\n\/**\n * PSR-3\u4e92\u63db\u306e\u30ed\u30b0\u30ec\u30d9\u30eb\u3092\u6301\u3064\u30b7\u30f3\u30d7\u30eb\u306a\u30ed\u30ac\u30fc\u30af\u30e9\u30b9\n *\/\nclass SimpleLogger {\n    const EMERGENCY = 'EMERGENCY';\n    const ALERT     = 'ALERT';\n    const CRITICAL  = 'CRITICAL';\n    const ERROR     = 'ERROR';\n    const WARNING   = 'WARNING';\n    const NOTICE    = 'NOTICE';\n    const INFO      = 'INFO';\n    const DEBUG     = 'DEBUG';\n    \n    private $min_level;\n    private $levels = [\n        self::EMERGENCY =&gt; 0,\n        self::ALERT     =&gt; 1,\n        self::CRITICAL  =&gt; 2,\n        self::ERROR     =&gt; 3,\n        self::WARNING   =&gt; 4,\n        self::NOTICE    =&gt; 5,\n        self::INFO      =&gt; 6,\n        self::DEBUG     =&gt; 7,\n    ];\n    \n    public function __construct($min_level = self::INFO) {\n        $this-&gt;min_level = $min_level;\n    }\n    \n    public function log($level, $message, array $context = []) {\n        \/\/ \u8a2d\u5b9a\u3055\u308c\u305f\u30ec\u30d9\u30eb\u4ee5\u4e0a\u306e\u91cd\u8981\u5ea6\u306e\u3082\u306e\u3060\u3051\u3092\u8a18\u9332\n        if ($this-&gt;levels[$level] &lt;= $this-&gt;levels[$this-&gt;min_level]) {\n            $context_str = !empty($context) ? ' ' . json_encode($context, JSON_UNESCAPED_UNICODE) : '';\n            error_log(\"[$level] $message$context_str\");\n        }\n    }\n    \n    \/\/ PSR-3\u4e92\u63db\u306e\u30e1\u30bd\u30c3\u30c9\n    public function emergency($message, array $context = []) { $this-&gt;log(self::EMERGENCY, $message, $context); }\n    public function alert($message, array $context = []) { $this-&gt;log(self::ALERT, $message, $context); }\n    public function critical($message, array $context = []) { $this-&gt;log(self::CRITICAL, $message, $context); }\n    public function error($message, array $context = []) { $this-&gt;log(self::ERROR, $message, $context); }\n    public function warning($message, array $context = []) { $this-&gt;log(self::WARNING, $message, $context); }\n    public function notice($message, array $context = []) { $this-&gt;log(self::NOTICE, $message, $context); }\n    public function info($message, array $context = []) { $this-&gt;log(self::INFO, $message, $context); }\n    public function debug($message, array $context = []) { $this-&gt;log(self::DEBUG, $message, $context); }\n}\n\n\/\/ \u4f7f\u7528\u4f8b\n$logger = new SimpleLogger(SimpleLogger::WARNING); \/\/ WARNING\u4ee5\u4e0a\u306e\u30ec\u30d9\u30eb\u306e\u307f\u8a18\u9332\n\n$logger-&gt;emergency(\"\u30b7\u30b9\u30c6\u30e0\u304c\u30af\u30e9\u30c3\u30b7\u30e5\u3057\u307e\u3057\u305f\");   \/\/ \u8a18\u9332\u3055\u308c\u308b\n$logger-&gt;error(\"\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u63a5\u7d9a\u30a8\u30e9\u30fc\");           \/\/ \u8a18\u9332\u3055\u308c\u308b\n$logger-&gt;warning(\"\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u304c\u4f4e\u4e0b\u3057\u3066\u3044\u307e\u3059\");   \/\/ \u8a18\u9332\u3055\u308c\u308b\n$logger-&gt;info(\"\u30e6\u30fc\u30b6\u30fc\u304c\u30ed\u30b0\u30a4\u30f3\u3057\u307e\u3057\u305f\");        \/\/ \u8a18\u9332\u3055\u308c\u306a\u3044\uff08INFO\u306fWARNING\u3088\u308a\u4f4e\u3044\u30ec\u30d9\u30eb\uff09\n$logger-&gt;debug(\"\u5909\u6570\u306e\u5024: \" . var_export($data, true)); \/\/ \u8a18\u9332\u3055\u308c\u306a\u3044\n<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-29\">\u30d0\u30c3\u30af\u30c8\u30ec\u30fc\u30b9\u60c5\u5831\u3092\u542b\u3081\u305f\u8a73\u7d30\u306a\u30a8\u30e9\u30fc\u30ed\u30b0\u306e\u53d6\u5f97\u65b9\u6cd5<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3057\u305f\u6b63\u78ba\u306a\u5834\u6240\u3092\u7279\u5b9a\u3059\u308b\u305f\u3081\u306b\u3001\u30d0\u30c3\u30af\u30c8\u30ec\u30fc\u30b9\u60c5\u5831\u3092\u30ed\u30b0\u306b\u542b\u3081\u308b\u3053\u3068\u304c\u975e\u5e38\u306b\u5f79\u7acb\u3061\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">&lt;?php\n\/**\n * \u30d0\u30c3\u30af\u30c8\u30ec\u30fc\u30b9\u60c5\u5831\u3092\u542b\u3081\u305f\u30a8\u30e9\u30fc\u30ed\u30b0\u3092\u51fa\u529b\u3059\u308b\u95a2\u6570\n *\/\nfunction log_with_backtrace($message, $level = 'ERROR') {\n    $backtrace = debug_backtrace(DEBUG_BACKTRACE_IGNORE_ARGS);\n    \n    \/\/ \u30d0\u30c3\u30af\u30c8\u30ec\u30fc\u30b9\u304b\u3089\u91cd\u8981\u306a\u60c5\u5831\u3060\u3051\u3092\u62bd\u51fa\n    $trace_info = [];\n    foreach ($backtrace as $i =&gt; $trace) {\n        $trace_info[] = sprintf(\n            \"#%d %s%s%s(%s) at %s:%d\",\n            $i,\n            isset($trace['class']) ? $trace['class'] : '',\n            isset($trace['type']) ? $trace['type'] : '',\n            $trace['function'],\n            '',  \/\/ \u5f15\u6570\u306f\u9664\u5916\uff08\u9577\u304f\u306a\u308a\u3059\u304e\u308b\u305f\u3081\uff09\n            $trace['file'] ?? '?',\n            $trace['line'] ?? '?'\n        );\n    }\n    \n    $log_entry = [\n        'timestamp' =&gt; date('Y-m-d H:i:s'),\n        'level' =&gt; $level,\n        'message' =&gt; $message,\n        'backtrace' =&gt; $trace_info\n    ];\n    \n    error_log(json_encode($log_entry, JSON_UNESCAPED_UNICODE));\n}\n\n\/\/ \u4f7f\u7528\u4f8b\nfunction process_data($data) {\n    if (empty($data)) {\n        log_with_backtrace(\"\u7a7a\u306e\u30c7\u30fc\u30bf\u304c\u6e21\u3055\u308c\u307e\u3057\u305f\");\n        return false;\n    }\n    return true;\n}\n\nfunction user_action() {\n    $result = process_data([]);\n    return $result;\n}\n\nuser_action();\n<\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e0a\u8a18\u306e\u30b3\u30fc\u30c9\u3092\u5b9f\u884c\u3059\u308b\u3068\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u30d0\u30c3\u30af\u30c8\u30ec\u30fc\u30b9\u60c5\u5831\u3092\u542b\u3093\u3060\u30ed\u30b0\u304c\u51fa\u529b\u3055\u308c\u307e\u3059\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">[23-Apr-2025 11:15:30 Asia\/Tokyo] {\"timestamp\":\"2025-04-23 11:15:30\",\"level\":\"ERROR\",\"message\":\"\u7a7a\u306e\u30c7\u30fc\u30bf\u304c\u6e21\u3055\u308c\u307e\u3057\u305f\",\"backtrace\":[\"#0 log_with_backtrace() at \/var\/www\/html\/example.php:110\",\"#1 process_data() at \/var\/www\/html\/example.php:121\",\"#2 user_action() at \/var\/www\/html\/example.php:126\",\"#3 {main}() at \/var\/www\/html\/example.php:128\"]}\n<\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u306e\u3088\u3046\u306a\u30d0\u30c3\u30af\u30c8\u30ec\u30fc\u30b9\u60c5\u5831\u3092\u542b\u3080\u30ed\u30b0\u3092\u51fa\u529b\u3059\u308b\u3053\u3068\u3067\u3001\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3057\u305f\u6b63\u78ba\u306a\u5834\u6240\u3068\u547c\u3073\u51fa\u3057\u5c65\u6b74\u3092\u628a\u63e1\u3067\u304d\u3001\u30c7\u30d0\u30c3\u30b0\u304c\u683c\u6bb5\u306b\u52b9\u7387\u5316\u3055\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4ee5\u4e0a\u306e\u30c6\u30af\u30cb\u30c3\u30af\u3092\u7d44\u307f\u5408\u308f\u305b\u308b\u3053\u3068\u3067\u3001PHP\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u958b\u767a\u52b9\u7387\u3068\u54c1\u8cea\u3092\u5927\u304d\u304f\u5411\u4e0a\u3055\u305b\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u6b21\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001\u74b0\u5883\u5225\u306e\u6700\u9069\u306aerror_log\u8a2d\u5b9a\u65b9\u6cd5\u306b\u3064\u3044\u3066\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-30\">\u74b0\u5883\u5225\uff01\u6700\u9069\u306aPHP error_log\u8a2d\u5b9a\u30ac\u30a4\u30c9<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">PHP \u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3092\u958b\u767a\u3059\u308b\u969b\u3001\u958b\u767a\u74b0\u5883\u3068\u672c\u756a\u74b0\u5883\u3067\u306f\u30a8\u30e9\u30fc\u30ed\u30b0\u306e\u8a2d\u5b9a\u3092\u9069\u5207\u306b\u4f7f\u3044\u5206\u3051\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001\u74b0\u5883\u3054\u3068\u306e\u6700\u9069\u306a\u30a8\u30e9\u30fc\u30ed\u30b0\u8a2d\u5b9a\u3068\u3001\u4e3b\u8981\u306a\u30d5\u30ec\u30fc\u30e0\u30ef\u30fc\u30af\u3067\u306e\u6d3b\u7528\u6cd5\u306b\u3064\u3044\u3066\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-31\">\u958b\u767a\u74b0\u5883\u3067\u306e\u30c7\u30d0\u30c3\u30b0\u306b\u6700\u9069\u306a\u30a8\u30e9\u30fc\u30ed\u30b0\u8a2d\u5b9a<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u958b\u767a\u74b0\u5883\u3067\u306f\u3001\u554f\u984c\u3092\u3059\u3050\u306b\u767a\u898b\u3057\u3066\u4fee\u6b63\u3067\u304d\u308b\u3088\u3046\u3001\u8a73\u7d30\u306a\u30a8\u30e9\u30fc\u60c5\u5831\u304c\u5fc5\u8981\u3067\u3059\u3002\u4ee5\u4e0b\u306f\u958b\u767a\u74b0\u5883\u306b\u6700\u9069\u306a php.ini \u306e\u8a2d\u5b9a\u4f8b\u3067\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">; \u958b\u767a\u74b0\u5883\u5411\u3051\u306e php.ini \u8a2d\u5b9a\n\n; \u3059\u3079\u3066\u306e\u30a8\u30e9\u30fc\u3092\u8868\u793a\u30fb\u8a18\u9332\u3059\u308b\nerror_reporting = E_ALL\n\n; \u30a8\u30e9\u30fc\u3092\u30d6\u30e9\u30a6\u30b6\u306b\u8868\u793a\u3059\u308b\uff08\u30c7\u30d0\u30c3\u30b0\u7528\uff09\ndisplay_errors = On\ndisplay_startup_errors = On\n\n; \u30a8\u30e9\u30fc\u3092\u30ed\u30b0\u30d5\u30a1\u30a4\u30eb\u306b\u8a18\u9332\u3059\u308b\nlog_errors = On\n\n; \u30ed\u30b0\u30d5\u30a1\u30a4\u30eb\u306e\u5834\u6240\u3092\u6307\u5b9a\nerror_log = \/path\/to\/development\/php_errors.log\n\n; \u30ed\u30b0\u306bHTML\u30bf\u30b0\u3092\u542b\u3081\u306a\u3044\nhtml_errors = Off\n\n; \u5404\u30a8\u30e9\u30fc\u304c\u30b9\u30af\u30ea\u30d7\u30c8\u5185\u306e\u3069\u3053\u3067\u767a\u751f\u3057\u305f\u304b\u3092\u8868\u793a\nerror_prepend_string = \"&lt;span style='color: #ff0000'&gt;\"\nerror_append_string = \"&lt;\/span&gt;\"\n\n; \u30a8\u30e9\u30fc\u30e1\u30c3\u30bb\u30fc\u30b8\u306e\u6700\u5927\u9577\uff08\u30d0\u30a4\u30c8\u5358\u4f4d\uff09\nlog_errors_max_len = 1024\n\n; \u5909\u6570\u30c0\u30f3\u30d7\u306eHTML\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u3092\u6709\u52b9\u306b\u3059\u308b\nhtml_errors = On\n\n; \u91cd\u8907\u30a8\u30e9\u30fc\u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u8a18\u9332\u3057\u306a\u3044\nignore_repeated_errors = Off\n\n; \u540c\u3058\u30d5\u30a1\u30a4\u30eb\u5185\u3067\u306e\u91cd\u8907\u30a8\u30e9\u30fc\u3092\u7121\u8996\u3059\u308b\nignore_repeated_source = Off\n\n; \u30b9\u30af\u30ea\u30d7\u30c8\u306e\u30a8\u30e9\u30fc\u5831\u544a\u30ec\u30d9\u30eb\u3092\u30e9\u30f3\u30bf\u30a4\u30e0\u3067\u5909\u66f4\u3067\u304d\u308b\nxmlrpc_errors = 0\n<\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u3055\u3089\u306b\u3001\u958b\u767a\u74b0\u5883\u3067\u306f\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u30c7\u30d0\u30c3\u30b0\u7528\u306e\u95a2\u6570\u3092 <code>.htaccess<\/code> \u30d5\u30a1\u30a4\u30eb\u307e\u305f\u306f PHP \u30b3\u30fc\u30c9\u5185\u3067\u4f7f\u7528\u3059\u308b\u3053\u3068\u3082\u52b9\u679c\u7684\u3067\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">&lt;?php\n\/\/ \u958b\u767a\u74b0\u5883\u7528\u306e\u30a8\u30e9\u30fc\u8a2d\u5b9a\nif ($_SERVER['SERVER_NAME'] === 'dev.example.com' || \n    $_SERVER['REMOTE_ADDR'] === '127.0.0.1') {\n    \n    \/\/ \u3059\u3079\u3066\u306e\u30a8\u30e9\u30fc\u3092\u5831\u544a\n    ini_set('error_reporting', E_ALL);\n    \n    \/\/ \u30a8\u30e9\u30fc\u3092\u753b\u9762\u306b\u8868\u793a\n    ini_set('display_errors', 1);\n    \n    \/\/ \u30a8\u30e9\u30fc\u3092\u30ed\u30b0\u306b\u8a18\u9332\n    ini_set('log_errors', 1);\n    \n    \/\/ \u30a8\u30e9\u30fc\u30ed\u30b0\u306e\u5834\u6240\u3092\u6307\u5b9a\n    ini_set('error_log', __DIR__ . '\/dev_errors.log');\n    \n    \/\/ \u30e1\u30e2\u30ea\u4f7f\u7528\u91cf\u306e\u4e0a\u9650\u3092\u5897\u3084\u3059\uff08\u5927\u304d\u306a\u30c7\u30d0\u30c3\u30b0\u51fa\u529b\u7528\uff09\n    ini_set('memory_limit', '256M');\n}\n<\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u306e\u3088\u3046\u306a\u8a2d\u5b9a\u306b\u3088\u308a\u3001\u958b\u767a\u4e2d\u306b\u30a8\u30e9\u30fc\u3092\u3059\u3050\u306b\u767a\u898b\u3057\u3001\u4fee\u6b63\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u307e\u305f\u3001\u30a8\u30e9\u30fc\u30ed\u30b0\u30d5\u30a1\u30a4\u30eb\u3092\u5b9a\u671f\u7684\u306b\u78ba\u8a8d\u3059\u308b\u3053\u3068\u3067\u3001\u6f5c\u5728\u7684\u306a\u554f\u984c\u3082\u65e9\u671f\u306b\u7279\u5b9a\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-32\">\u672c\u756a\u74b0\u5883\u3067\u306e\u5b89\u5168\u306a\u30a8\u30e9\u30fc\u30ed\u30b0\u8a2d\u5b9a\u3068\u76e3\u8996\u65b9\u6cd5<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u672c\u756a\u74b0\u5883\u3067\u306f\u3001\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u3068\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u8003\u616e\u3057\u305f\u30a8\u30e9\u30fc\u30ed\u30b0\u8a2d\u5b9a\u304c\u91cd\u8981\u3067\u3059\u3002\u30a8\u30f3\u30c9\u30e6\u30fc\u30b6\u30fc\u306b\u30a8\u30e9\u30fc\u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u8868\u793a\u3057\u306a\u3044\u3088\u3046\u6ce8\u610f\u3057\u3064\u3064\u3001\u91cd\u8981\u306a\u60c5\u5831\u306f\u78ba\u5b9f\u306b\u8a18\u9332\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">; \u672c\u756a\u74b0\u5883\u5411\u3051\u306e php.ini \u8a2d\u5b9a\n\n; \u91cd\u8981\u306a\u30a8\u30e9\u30fc\u306e\u307f\u3092\u8a18\u9332\u3059\u308b\uff08\u901a\u77e5\u30ec\u30d9\u30eb\u306f\u9664\u5916\uff09\nerror_reporting = E_ALL &amp; ~E_DEPRECATED &amp; ~E_STRICT &amp; ~E_NOTICE\n\n; \u30a8\u30e9\u30fc\u3092\u30d6\u30e9\u30a6\u30b6\u306b\u8868\u793a\u3057\u306a\u3044\uff08\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u306e\u305f\u3081\uff09\ndisplay_errors = Off\ndisplay_startup_errors = Off\n\n; \u30a8\u30e9\u30fc\u3092\u30ed\u30b0\u30d5\u30a1\u30a4\u30eb\u306b\u8a18\u9332\u3059\u308b\nlog_errors = On\n\n; \u30ed\u30b0\u30d5\u30a1\u30a4\u30eb\u306e\u5834\u6240\u3092\u6307\u5b9a\nerror_log = \/path\/to\/production\/php_errors.log\n\n; \u30ed\u30b0\u306bHTML\u30bf\u30b0\u3092\u542b\u3081\u306a\u3044\nhtml_errors = Off\n\n; \u30a8\u30e9\u30fc\u30e1\u30c3\u30bb\u30fc\u30b8\u306e\u6700\u5927\u9577\uff08\u30d0\u30a4\u30c8\u5358\u4f4d\uff09\nlog_errors_max_len = 1024\n\n; \u91cd\u8907\u30a8\u30e9\u30fc\u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u8a18\u9332\u3057\u306a\u3044\uff08\u30ed\u30b0\u30b5\u30a4\u30ba\u524a\u6e1b\u306e\u305f\u3081\uff09\nignore_repeated_errors = On\n\n; \u540c\u3058\u30d5\u30a1\u30a4\u30eb\u5185\u3067\u306e\u91cd\u8907\u30a8\u30e9\u30fc\u3092\u7121\u8996\u3059\u308b\nignore_repeated_source = On\n<\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u672c\u756a\u74b0\u5883\u3067\u306e\u30a8\u30e9\u30fc\u30ed\u30b0\u76e3\u8996\u306b\u306f\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u65b9\u6cd5\u304c\u52b9\u679c\u7684\u3067\u3059\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u30ed\u30b0\u30ed\u30fc\u30c6\u30fc\u30b7\u30e7\u30f3\u8a2d\u5b9a<\/strong>\uff1alogrotate \u306a\u3069\u306e\u30c4\u30fc\u30eb\u3092\u4f7f\u7528\u3057\u3066\u3001\u30ed\u30b0\u30d5\u30a1\u30a4\u30eb\u304c\u80a5\u5927\u5316\u3057\u306a\u3044\u3088\u3046\u306b\u3059\u308b<\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\"># \/etc\/logrotate.d\/php-errors \u306e\u8a2d\u5b9a\u4f8b\n\/path\/to\/production\/php_errors.log {\n    daily\n    missingok\n    rotate 14\n    compress\n    delaycompress\n    notifempty\n    create 0640 www-data www-data\n    sharedscripts\n    postrotate\n        \/etc\/init.d\/apache2 reload &gt; \/dev\/null 2&gt;\/dev\/null || true\n    endscript\n}\n<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li><strong>\u76e3\u8996\u30c4\u30fc\u30eb\u3068\u306e\u9023\u643a<\/strong>\uff1aDatadog\u3001New Relic\u3001ELK Stack \u306a\u3069\u306e\u30e2\u30cb\u30bf\u30ea\u30f3\u30b0\u30c4\u30fc\u30eb\u3068\u9023\u643a\u3057\u3001\u30a8\u30e9\u30fc\u306e\u767a\u751f\u3092\u76e3\u8996\u3059\u308b<\/li>\n\n\n\n<li><strong>\u30a2\u30e9\u30fc\u30c8\u8a2d\u5b9a<\/strong>\uff1a\u91cd\u5927\u306a\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3057\u305f\u5834\u5408\u306b\u3001\u30e1\u30fc\u30eb\u3084 Slack \u306a\u3069\u3067\u901a\u77e5\u3092\u53d7\u3051\u53d6\u308b\u4ed5\u7d44\u307f\u3092\u69cb\u7bc9\u3059\u308b<\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">&lt;?php\n\/\/ \u91cd\u5927\u306a\u30a8\u30e9\u30fc\u3092\u691c\u77e5\u3057\u3066\u30a2\u30e9\u30fc\u30c8\u901a\u77e5\u3059\u308b\u30ab\u30b9\u30bf\u30e0\u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30e9\nfunction critical_error_handler($errno, $errstr, $errfile, $errline) {\n    if ($errno == E_ERROR || $errno == E_CORE_ERROR || $errno == E_COMPILE_ERROR || $errno == E_USER_ERROR) {\n        \/\/ \u30a8\u30e9\u30fc\u30ed\u30b0\u306b\u8a18\u9332\n        error_log(\"\u81f4\u547d\u7684\u30a8\u30e9\u30fc [$errno]: $errstr in $errfile on line $errline\");\n        \n        \/\/ \u30a2\u30e9\u30fc\u30c8\u901a\u77e5\uff08\u30e1\u30fc\u30eb\u3001Slack \u306a\u3069\uff09\n        mail('admin@example.com', '\u30b5\u30a4\u30c8\u969c\u5bb3\u30a2\u30e9\u30fc\u30c8', \n             \"\u81f4\u547d\u7684\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3057\u307e\u3057\u305f:\\n\\nType: $errno\\nMessage: $errstr\\nFile: $errfile\\nLine: $errline\");\n        \n        \/\/ Slack \u901a\u77e5\u306e\u4f8b\n        $slack_webhook = 'https:\/\/hooks.slack.com\/services\/XXXX\/YYYY\/ZZZZ';\n        $payload = json_encode([\n            'text' =&gt; \"\ud83d\udea8 *\u81f4\u547d\u7684\u30a8\u30e9\u30fc* \ud83d\udea8\\nType: $errno\\nMessage: $errstr\\nFile: $errfile\\nLine: $errline\"\n        ]);\n        \n        $ch = curl_init($slack_webhook);\n        curl_setopt($ch, CURLOPT_CUSTOMREQUEST, \"POST\");\n        curl_setopt($ch, CURLOPT_POSTFIELDS, ['payload' =&gt; $payload]);\n        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);\n        curl_exec($ch);\n        curl_close($ch);\n    }\n    \n    \/\/ PHP \u306e\u6a19\u6e96\u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30e9\u306b\u51e6\u7406\u3092\u4efb\u305b\u308b\n    return false;\n}\n\n\/\/ \u30ab\u30b9\u30bf\u30e0\u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30e9\u3092\u767b\u9332\nset_error_handler('critical_error_handler', E_ERROR | E_CORE_ERROR | E_COMPILE_ERROR | E_USER_ERROR);\n<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-33\">\u5404\u7a2e\u30d5\u30ec\u30fc\u30e0\u30ef\u30fc\u30af\uff08Laravel, WordPress\u7b49\uff09\u3067\u306eerror_log\u6d3b\u7528\u6cd5<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e3b\u8981\u306a PHP \u30d5\u30ec\u30fc\u30e0\u30ef\u30fc\u30af\u3084\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306b\u306f\u3001\u305d\u308c\u305e\u308c\u72ec\u81ea\u306e\u30ed\u30ae\u30f3\u30b0\u6a5f\u69cb\u304c\u5b9f\u88c5\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u3053\u3053\u3067\u306f\u3001\u4eba\u6c17\u306e\u30d5\u30ec\u30fc\u30e0\u30ef\u30fc\u30af\u3067\u306e error_log \u6d3b\u7528\u6cd5\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-34\">Laravel \u3067\u306e\u30a8\u30e9\u30fc\u30ed\u30b0\u8a2d\u5b9a<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">Laravel \u3067\u306f\u3001<code>.env<\/code> \u30d5\u30a1\u30a4\u30eb\u3068 <code>config\/logging.php<\/code> \u3067\u30ed\u30b0\u8a2d\u5b9a\u3092\u884c\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\"># .env \u30d5\u30a1\u30a4\u30eb\u306e\u8a2d\u5b9a\u4f8b\nAPP_ENV=production\nAPP_DEBUG=false\nLOG_CHANNEL=stack\nLOG_LEVEL=error\n<\/pre>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ config\/logging.php \u306e\u8a2d\u5b9a\u4f8b\n'channels' =&gt; [\n    'stack' =&gt; [\n        'driver' =&gt; 'stack',\n        'channels' =&gt; ['daily', 'slack'],\n        'ignore_exceptions' =&gt; false,\n    ],\n    'daily' =&gt; [\n        'driver' =&gt; 'daily',\n        'path' =&gt; storage_path('logs\/laravel.log'),\n        'level' =&gt; env('LOG_LEVEL', 'error'),\n        'days' =&gt; 14,\n    ],\n    'slack' =&gt; [\n        'driver' =&gt; 'slack',\n        'url' =&gt; env('LOG_SLACK_WEBHOOK_URL'),\n        'username' =&gt; 'Laravel Log',\n        'emoji' =&gt; ':boom:',\n        'level' =&gt; 'critical',\n    ],\n],\n<\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Laravel \u3067\u306f\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306b Log \u30d5\u30a1\u30b5\u30fc\u30c9\u3092\u4f7f\u7528\u3057\u3066\u30ed\u30b0\u3092\u8a18\u9332\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">&lt;?php\nuse Illuminate\\Support\\Facades\\Log;\n\n\/\/ \u57fa\u672c\u7684\u306a\u4f7f\u7528\u6cd5\nLog::error('\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u63a5\u7d9a\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3057\u307e\u3057\u305f');\n\n\/\/ \u30b3\u30f3\u30c6\u30ad\u30b9\u30c8\u60c5\u5831\u3092\u542b\u3081\u308b\nLog::warning('\u30e6\u30fc\u30b6\u30fc\u8a8d\u8a3c\u5931\u6557', ['user_id' =&gt; $id, 'ip' =&gt; $request-&gt;ip()]);\n\n\/\/ \u4f8b\u5916\u3092\u30ed\u30b0\u306b\u8a18\u9332\ntry {\n    \/\/ \u4f55\u3089\u304b\u306e\u51e6\u7406\n} catch (\\Exception $e) {\n    Log::error('\u51e6\u7406\u4e2d\u306b\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3057\u307e\u3057\u305f: ' . $e-&gt;getMessage(), [\n        'exception' =&gt; $e,\n        'file' =&gt; $e-&gt;getFile(),\n        'line' =&gt; $e-&gt;getLine(),\n        'trace' =&gt; $e-&gt;getTraceAsString()\n    ]);\n}\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-35\">WordPress \u3067\u306e\u30a8\u30e9\u30fc\u30ed\u30b0\u6d3b\u7528<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">WordPress \u3067\u306f\u3001<code>wp-config.php<\/code> \u30d5\u30a1\u30a4\u30eb\u3067\u30c7\u30d0\u30c3\u30b0\u8a2d\u5b9a\u3092\u884c\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ wp-config.php \u306e\u8a2d\u5b9a\u4f8b\n\n\/\/ \u30c7\u30d0\u30c3\u30b0\u30e2\u30fc\u30c9\u3092\u6709\u52b9\u306b\u3059\u308b\uff08\u958b\u767a\u74b0\u5883\u306e\u307f\uff09\ndefine('WP_DEBUG', true);\n\n\/\/ \u30a8\u30e9\u30fc\u3092\u30ed\u30b0\u30d5\u30a1\u30a4\u30eb\u306b\u8a18\u9332\u3059\u308b\ndefine('WP_DEBUG_LOG', true);\n\n\/\/ \u30a8\u30e9\u30fc\u3092\u753b\u9762\u306b\u8868\u793a\u3057\u306a\u3044\uff08\u672c\u756a\u74b0\u5883\u3067\u63a8\u5968\uff09\ndefine('WP_DEBUG_DISPLAY', false);\n\n\/\/ \u3059\u3079\u3066\u306e PHP \u30a8\u30e9\u30fc\u3092\u8868\u793a\n@ini_set('display_errors', 0);\n\n\/\/ \u30ab\u30b9\u30bf\u30e0\u30a8\u30e9\u30fc\u30ed\u30b0\u306e\u5834\u6240\u3092\u6307\u5b9a\uff08\u30aa\u30d7\u30b7\u30e7\u30f3\uff09\ndefine('WP_DEBUG_LOG', '\/path\/to\/custom\/debug.log');\n<\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">WordPress \u3067\u306e\u30ab\u30b9\u30bf\u30e0\u30ed\u30b0\u8a18\u9332\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">&lt;?php\n\/\/ WordPress \u95a2\u6570\u3092\u4f7f\u7528\u3057\u305f\u30ed\u30b0\u8a18\u9332\nif (function_exists('write_log')) {\n    function write_log($log) {\n        if (is_array($log) || is_object($log)) {\n            error_log(print_r($log, true));\n        } else {\n            error_log($log);\n        }\n    }\n}\n\n\/\/ \u4f7f\u7528\u4f8b\nwrite_log('\u91cd\u8981\u306a\u51e6\u7406\u3092\u5b9f\u884c\u3057\u307e\u3059');\nwrite_log($complex_object);\n\n\/\/ \u307e\u305f\u306f\u76f4\u63a5 error_log \u3092\u4f7f\u7528\nerror_log('WordPress \u30d7\u30e9\u30b0\u30a4\u30f3\u304b\u3089\u306e\u30a8\u30e9\u30fc\u30e1\u30c3\u30bb\u30fc\u30b8');\n<\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u9069\u5207\u306a\u30a8\u30e9\u30fc\u30ed\u30b0\u8a2d\u5b9a\u306b\u3088\u308a\u3001\u5404\u74b0\u5883\u306b\u6700\u9069\u5316\u3055\u308c\u305f\u30c7\u30d0\u30c3\u30b0\u3068\u76e3\u8996\u304c\u53ef\u80fd\u306b\u306a\u308a\u307e\u3059\u3002\u6b21\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001PHP error_log \u3092\u4f7f\u7528\u3059\u308b\u969b\u306b\u3088\u304f\u906d\u9047\u3059\u308b\u30c8\u30e9\u30d6\u30eb\u3068\u305d\u306e\u89e3\u6c7a\u7b56\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-36\">PHP error_log\u3067\u3088\u304f\u3042\u308b\u30c8\u30e9\u30d6\u30eb\u3068\u89e3\u6c7a\u7b56<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u30a8\u30e9\u30fc\u30ed\u30b0\u6a5f\u80fd\u306f\u975e\u5e38\u306b\u4fbf\u5229\u3067\u3059\u304c\u3001\u8a2d\u5b9a\u3084\u4f7f\u7528\u65b9\u6cd5\u306b\u3088\u3063\u3066\u306f\u554f\u984c\u304c\u767a\u751f\u3059\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001PHP error_log \u3092\u4f7f\u7528\u3059\u308b\u969b\u306b\u3088\u304f\u906d\u9047\u3059\u308b\u30c8\u30e9\u30d6\u30eb\u3068\u305d\u306e\u89e3\u6c7a\u7b56\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-37\">\u30ed\u30b0\u304c\u51fa\u529b\u3055\u308c\u306a\u3044\uff01\u8003\u3048\u3089\u308c\u308b\u539f\u56e0\u3068\u5bfe\u51e6\u6cd5<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u30ed\u30b0\u304c\u6b63\u3057\u304f\u51fa\u529b\u3055\u308c\u306a\u3044\u306e\u306f\u3001PHP\u958b\u767a\u8005\u304c\u3088\u304f\u906d\u9047\u3059\u308b\u554f\u984c\u306e\u4e00\u3064\u3067\u3059\u3002\u4ee5\u4e0b\u306e\u539f\u56e0\u3068\u89e3\u6c7a\u7b56\u3092\u9806\u756a\u306b\u78ba\u8a8d\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-38\">1. php.ini \u306e\u8a2d\u5b9a\u304c\u6709\u52b9\u306b\u306a\u3063\u3066\u3044\u306a\u3044<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u75c7\u72b6<\/strong>: error_log \u95a2\u6570\u3092\u4f7f\u7528\u3057\u3066\u3082\u30ed\u30b0\u30d5\u30a1\u30a4\u30eb\u306b\u30a8\u30f3\u30c8\u30ea\u304c\u8ffd\u52a0\u3055\u308c\u306a\u3044<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u89e3\u6c7a\u7b56<\/strong>:<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u307e\u305a\u3001\u73fe\u5728\u306e PHP \u8a2d\u5b9a\u3092\u78ba\u8a8d\u3057\u307e\u3059\uff1a<\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">&lt;?php\n\/\/ \u73fe\u5728\u306e\u8a2d\u5b9a\u3092\u78ba\u8a8d\u3059\u308b\u30b9\u30af\u30ea\u30d7\u30c8\necho \"log_errors = \" . ini_get('log_errors') . \"&lt;br&gt;\";\necho \"error_log = \" . ini_get('error_log') . \"&lt;br&gt;\";\nphpinfo();\n<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li>php.ini \u30d5\u30a1\u30a4\u30eb\u3067\u4ee5\u4e0b\u306e\u8a2d\u5b9a\u304c\u6b63\u3057\u304f\u884c\u308f\u308c\u3066\u3044\u308b\u304b\u78ba\u8a8d\u3057\u307e\u3059\uff1a<\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">log_errors = On\nerror_log = \/path\/to\/your\/php_errors.log\n<\/pre>\n\n\n\n<ol start=\"3\" class=\"wp-block-list\">\n<li>\u8a2d\u5b9a\u5f8c\u3001Web\u30b5\u30fc\u30d0\u30fc\uff08Apache\/Nginx\uff09\u3092\u518d\u8d77\u52d5\u3057\u307e\u3059\uff1a<\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\"># Apache \u306e\u5834\u5408\nsudo systemctl restart apache2\n\n# Nginx \u3068 PHP-FPM \u306e\u5834\u5408\nsudo systemctl restart nginx\nsudo systemctl restart php-fpm\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-39\">2. \u30d5\u30a1\u30a4\u30eb\u306e\u30d1\u30fc\u30df\u30c3\u30b7\u30e7\u30f3\u554f\u984c<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u75c7\u72b6<\/strong>: \u8a2d\u5b9a\u306f\u6b63\u3057\u3044\u304c\u30ed\u30b0\u30d5\u30a1\u30a4\u30eb\u306b\u66f8\u304d\u8fbc\u3081\u306a\u3044<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u89e3\u6c7a\u7b56<\/strong>:<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u30ed\u30b0\u30d5\u30a1\u30a4\u30eb\u3068\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u306e\u6240\u6709\u8005\u3092\u78ba\u8a8d\u3057\u307e\u3059\uff1a<\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">ls -la \/path\/to\/your\/php_errors.log\n<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li>\u30ed\u30b0\u30d5\u30a1\u30a4\u30eb\u306e\u6240\u6709\u8005\u3092Web\u30b5\u30fc\u30d0\u30fc\u30e6\u30fc\u30b6\u30fc\uff08www-data, apache, nginx \u306a\u3069\uff09\u306b\u5909\u66f4\u3057\u307e\u3059\uff1a<\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\"># \u30ed\u30b0\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u3092\u4f5c\u6210\nsudo mkdir -p \/var\/log\/php\n\n# \u6240\u6709\u6a29\u3092\u5909\u66f4\nsudo chown www-data:www-data \/var\/log\/php\n\n# \u30d1\u30fc\u30df\u30c3\u30b7\u30e7\u30f3\u3092\u8a2d\u5b9a\nsudo chmod 755 \/var\/log\/php\nsudo touch \/var\/log\/php\/errors.log\nsudo chown www-data:www-data \/var\/log\/php\/errors.log\nsudo chmod 644 \/var\/log\/php\/errors.log\n<\/pre>\n\n\n\n<ol start=\"3\" class=\"wp-block-list\">\n<li>SELinux \u304c\u6709\u52b9\u306a\u5834\u5408\u306f\u3001\u30b3\u30f3\u30c6\u30ad\u30b9\u30c8\u3082\u8a2d\u5b9a\u3057\u307e\u3059\uff1a<\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">sudo semanage fcontext -a -t httpd_log_t \"\/var\/log\/php(\/.*)?\"\nsudo restorecon -Rv \/var\/log\/php\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-40\">3. \u51fa\u529b\u5148\u304c\u9593\u9055\u3063\u3066\u3044\u308b<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u75c7\u72b6<\/strong>: \u30ed\u30b0\u30d5\u30a1\u30a4\u30eb\u306e\u5834\u6240\u3092\u63a2\u3057\u3066\u3082\u898b\u3064\u304b\u3089\u306a\u3044<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u89e3\u6c7a\u7b56<\/strong>:<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u30c7\u30d5\u30a9\u30eb\u30c8\u306e\u30ed\u30b0\u5834\u6240\u3092\u78ba\u8a8d\u3057\u307e\u3059\uff08\u30b7\u30b9\u30c6\u30e0\u306b\u3088\u3063\u3066\u7570\u306a\u308a\u307e\u3059\uff09\uff1a\n<ul class=\"wp-block-list\">\n<li>Apache: <code>\/var\/log\/apache2\/error.log<\/code> \u307e\u305f\u306f <code>\/var\/log\/httpd\/error_log<\/code><\/li>\n\n\n\n<li>Nginx: <code>\/var\/log\/nginx\/error.log<\/code><\/li>\n\n\n\n<li>PHP-FPM: <code>\/var\/log\/php-fpm\/error.log<\/code><\/li>\n\n\n\n<li>\u30b7\u30b9\u30c6\u30e0\u30ed\u30b0: <code>\/var\/log\/syslog<\/code> \u307e\u305f\u306f <code>\/var\/log\/messages<\/code><\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>PHP \u30b9\u30af\u30ea\u30d7\u30c8\u304b\u3089\u73fe\u5728\u306e\u30ed\u30b0\u8a2d\u5b9a\u3092\u51fa\u529b\u3057\u3066\u78ba\u8a8d\u3057\u307e\u3059\uff1a<\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">&lt;?php\necho \"\u73fe\u5728\u306e\u30a8\u30e9\u30fc\u30ed\u30b0\u30d1\u30b9: \" . ini_get('error_log');\n<\/pre>\n\n\n\n<ol start=\"3\" class=\"wp-block-list\">\n<li>\u7279\u5b9a\u306e\u30d5\u30a1\u30a4\u30eb\u306b\u30ed\u30b0\u3092\u5f37\u5236\u7684\u306b\u51fa\u529b\u3059\u308b\u3088\u3046\u6307\u5b9a\u3057\u307e\u3059\uff1a<\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">&lt;?php\nerror_log(\"\u30c6\u30b9\u30c8\u30e1\u30c3\u30bb\u30fc\u30b8\", 3, __DIR__ . '\/my_custom_error.log');\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-41\">4. \u30a8\u30e9\u30fc\u30ec\u30d9\u30eb\u306e\u8a2d\u5b9a\u304c\u4e0d\u9069\u5207<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u75c7\u72b6<\/strong>: \u7279\u5b9a\u306e\u30bf\u30a4\u30d7\u306e\u30a8\u30e9\u30fc\u3084\u30e1\u30c3\u30bb\u30fc\u30b8\u304c\u8a18\u9332\u3055\u308c\u306a\u3044<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u89e3\u6c7a\u7b56<\/strong>:<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">&lt;?php\n\/\/ \u3059\u3079\u3066\u306e\u30a8\u30e9\u30fc\u30ec\u30d9\u30eb\u3092\u6709\u52b9\u306b\u3059\u308b\nerror_reporting(E_ALL);\nini_set('display_errors', 1);\nini_set('log_errors', 1);\n\n\/\/ \u30a8\u30e9\u30fc\u3092\u5f37\u5236\u7684\u306b\u767a\u751f\u3055\u305b\u3066\u30c6\u30b9\u30c8\u3059\u308b\n$undefined_variable;  \/\/ E_NOTICE \u3092\u767a\u751f\u3055\u305b\u308b\n<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-42\">\u30ed\u30b0\u30d5\u30a1\u30a4\u30eb\u306e\u30a2\u30af\u30bb\u30b9\u6a29\u9650\u3068\u30ed\u30fc\u30c6\u30fc\u30b7\u30e7\u30f3\u8a2d\u5b9a<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u30ed\u30b0\u30d5\u30a1\u30a4\u30eb\u304c\u6b63\u3057\u304f\u4f5c\u6210\u3055\u308c\u3066\u3082\u3001\u6642\u9593\u306e\u7d4c\u904e\u3068\u3068\u3082\u306b\u80a5\u5927\u5316\u3057\u3001\u30c7\u30a3\u30b9\u30af\u5bb9\u91cf\u3092\u5727\u8feb\u3059\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002\u9069\u5207\u306a\u30ed\u30b0\u30ed\u30fc\u30c6\u30fc\u30b7\u30e7\u30f3\u8a2d\u5b9a\u304c\u91cd\u8981\u3067\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-43\">\u9069\u5207\u306a\u30ed\u30b0\u30ed\u30fc\u30c6\u30fc\u30b7\u30e7\u30f3\u306e\u8a2d\u5b9a<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Linux\uff08logrotate \u3092\u4f7f\u7528\uff09<\/strong>:<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><code>\/etc\/logrotate.d\/<\/code> \u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u306b\u8a2d\u5b9a\u30d5\u30a1\u30a4\u30eb\u3092\u4f5c\u6210\u3057\u307e\u3059\uff1a<\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">sudo nano \/etc\/logrotate.d\/php-error-logs\n<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li>\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u8a2d\u5b9a\u3092\u8ffd\u52a0\u3057\u307e\u3059\uff1a<\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/var\/log\/php\/*.log {\n    daily\n    missingok\n    rotate 14\n    compress\n    delaycompress\n    notifempty\n    create 0644 www-data www-data\n    sharedscripts\n    postrotate\n        \/usr\/lib\/php\/php-log-rotate\n    endscript\n}\n<\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u306e\u8a2d\u5b9a\u306b\u3088\u308a\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30ed\u30b0\u30d5\u30a1\u30a4\u30eb\u306f\u6bce\u65e5\u30ed\u30fc\u30c6\u30fc\u30b7\u30e7\u30f3\u3055\u308c\u307e\u3059<\/li>\n\n\n\n<li>14\u65e5\u5206\u306e\u30ed\u30b0\u304c\u4fdd\u6301\u3055\u308c\u307e\u3059<\/li>\n\n\n\n<li>\u53e4\u3044\u30ed\u30b0\u306f\u5727\u7e2e\u3055\u308c\u307e\u3059<\/li>\n\n\n\n<li>\u7a7a\u306e\u30ed\u30b0\u30d5\u30a1\u30a4\u30eb\u306f\u30ed\u30fc\u30c6\u30fc\u30b7\u30e7\u30f3\u3055\u308c\u307e\u305b\u3093<\/li>\n\n\n\n<li>\u65b0\u3057\u3044\u30ed\u30b0\u30d5\u30a1\u30a4\u30eb\u306f\u9069\u5207\u306a\u6a29\u9650\u3067\u4f5c\u6210\u3055\u308c\u307e\u3059<\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-44\">PHP \u30b3\u30fc\u30c9\u3067\u306e\u30ed\u30b0\u30ed\u30fc\u30c6\u30fc\u30b7\u30e7\u30f3\u5b9f\u88c5<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">\u72ec\u81ea\u306e\u30ed\u30b0\u30ed\u30fc\u30c6\u30fc\u30b7\u30e7\u30f3\u30ed\u30b8\u30c3\u30af\u3092\u5b9f\u88c5\u3059\u308b\u5834\u5408\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">&lt;?php\n\/**\n * \u30b7\u30f3\u30d7\u30eb\u306a\u30ed\u30b0\u30ed\u30fc\u30c6\u30fc\u30b7\u30e7\u30f3\u30af\u30e9\u30b9\n *\/\nclass LogRotator {\n    private $logFile;\n    private $maxSize;    \/\/ \u30d0\u30a4\u30c8\u5358\u4f4d\n    private $backupCount;\n    \n    public function __construct($logFile, $maxSize = 10485760, $backupCount = 5) {\n        $this-&gt;logFile = $logFile;\n        $this-&gt;maxSize = $maxSize;\n        $this-&gt;backupCount = $backupCount;\n    }\n    \n    public function log($message) {\n        \/\/ \u30ed\u30fc\u30c6\u30fc\u30b7\u30e7\u30f3\u304c\u5fc5\u8981\u304b\u78ba\u8a8d\n        $this-&gt;rotateIfNecessary();\n        \n        \/\/ \u30bf\u30a4\u30e0\u30b9\u30bf\u30f3\u30d7\u4ed8\u304d\u3067\u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u8a18\u9332\n        $timestamp = date('Y-m-d H:i:s');\n        return error_log(\"[$timestamp] $message\" . PHP_EOL, 3, $this-&gt;logFile);\n    }\n    \n    protected function rotateIfNecessary() {\n        \/\/ \u30d5\u30a1\u30a4\u30eb\u304c\u5b58\u5728\u3057\u306a\u3044\u304b\u3001\u6700\u5927\u30b5\u30a4\u30ba\u672a\u6e80\u306a\u3089\u4f55\u3082\u3057\u306a\u3044\n        if (!file_exists($this-&gt;logFile) || filesize($this-&gt;logFile) &lt; $this-&gt;maxSize) {\n            return;\n        }\n        \n        \/\/ \u6700\u3082\u53e4\u3044\u30ed\u30b0\u3092\u524a\u9664\uff08\u6700\u5927\u6570\u306b\u9054\u3057\u3066\u3044\u308b\u5834\u5408\uff09\n        $oldestLog = $this-&gt;logFile . '.' . $this-&gt;backupCount;\n        if (file_exists($oldestLog)) {\n            unlink($oldestLog);\n        }\n        \n        \/\/ \u65e2\u5b58\u306e\u30d0\u30c3\u30af\u30a2\u30c3\u30d7\u3092\u30b7\u30d5\u30c8\n        for ($i = $this-&gt;backupCount - 1; $i &gt;= 1; $i--) {\n            $oldFile = $this-&gt;logFile . '.' . $i;\n            $newFile = $this-&gt;logFile . '.' . ($i + 1);\n            if (file_exists($oldFile)) {\n                rename($oldFile, $newFile);\n            }\n        }\n        \n        \/\/ \u73fe\u5728\u306e\u30ed\u30b0\u3092 .1 \u3068\u3057\u3066\u30ea\u30cd\u30fc\u30e0\n        rename($this-&gt;logFile, $this-&gt;logFile . '.1');\n        \n        \/\/ \u65b0\u3057\u3044\u7a7a\u306e\u30ed\u30b0\u30d5\u30a1\u30a4\u30eb\u3092\u4f5c\u6210\n        touch($this-&gt;logFile);\n        chmod($this-&gt;logFile, 0644);\n    }\n}\n\n\/\/ \u4f7f\u7528\u4f8b\n$logger = new LogRotator(__DIR__ . '\/application.log', 1048576, 7);  \/\/ 1MB, 7\u65e5\u5206\u4fdd\u5b58\n$logger-&gt;log(\"\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u8d77\u52d5 - \" . $_SERVER['REMOTE_ADDR']);\n<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-45\">\u30de\u30eb\u30c1\u30b5\u30fc\u30d0\u30fc\u74b0\u5883\u3067\u306e\u30a8\u30e9\u30fc\u30ed\u30b0\u7ba1\u7406\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u8907\u6570\u306e\u30b5\u30fc\u30d0\u30fc\u3067\u69cb\u6210\u3055\u308c\u308b\u74b0\u5883\u3067\u306f\u3001\u30a8\u30e9\u30fc\u30ed\u30b0\u306e\u96c6\u4e2d\u7ba1\u7406\u304c\u91cd\u8981\u306b\u306a\u308a\u307e\u3059\u3002\u4ee5\u4e0b\u306b\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-46\">1. \u96c6\u4e2d\u30ed\u30b0\u7ba1\u7406\u30b7\u30b9\u30c6\u30e0\u306e\u5c0e\u5165<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">\u8907\u6570\u30b5\u30fc\u30d0\u30fc\u304b\u3089\u306e\u30ed\u30b0\u3092\u4e00\u5143\u7ba1\u7406\u3059\u308b\u305f\u3081\u306b\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u30ed\u30b0\u7ba1\u7406\u30b7\u30b9\u30c6\u30e0\u304c\u52b9\u679c\u7684\u3067\u3059\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>ELK Stack (Elasticsearch, Logstash, Kibana)<\/strong><\/li>\n\n\n\n<li><strong>Graylog<\/strong><\/li>\n\n\n\n<li><strong>Splunk<\/strong><\/li>\n\n\n\n<li><strong>Datadog<\/strong><\/li>\n\n\n\n<li><strong>New Relic<\/strong><\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-47\">2. \u69cb\u9020\u5316\u30ed\u30b0\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u306e\u63a1\u7528<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">JSON\u306a\u3069\u306e\u69cb\u9020\u5316\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u3067\u30ed\u30b0\u3092\u51fa\u529b\u3059\u308b\u3053\u3068\u3067\u3001\u89e3\u6790\u304c\u5bb9\u6613\u306b\u306a\u308a\u307e\u3059\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">&lt;?php\n\/**\n * \u69cb\u9020\u5316JSON\u30ed\u30b0\u3092\u51fa\u529b\u3059\u308b\u95a2\u6570\n *\/\nfunction log_structured($message, $level = 'INFO', $context = []) {\n    \/\/ \u57fa\u672c\u7684\u306a\u30ed\u30b0\u30d5\u30a3\u30fc\u30eb\u30c9\n    $log_entry = [\n        'timestamp' =&gt; date('Y-m-d\\TH:i:s.vP'),  \/\/ ISO 8601\u5f62\u5f0f\n        'host' =&gt; gethostname(),\n        'level' =&gt; $level,\n        'message' =&gt; $message,\n        'context' =&gt; $context\n    ];\n    \n    \/\/ \u30ea\u30af\u30a8\u30b9\u30c8\u60c5\u5831\u3092\u8ffd\u52a0\n    if (isset($_SERVER['REQUEST_URI'])) {\n        $log_entry['request'] = [\n            'method' =&gt; $_SERVER['REQUEST_METHOD'] ?? 'UNKNOWN',\n            'uri' =&gt; $_SERVER['REQUEST_URI'],\n            'ip' =&gt; $_SERVER['REMOTE_ADDR'],\n            'user_agent' =&gt; $_SERVER['HTTP_USER_AGENT'] ?? 'UNKNOWN'\n        ];\n    }\n    \n    \/\/ \u4e00\u610f\u306e\u30ea\u30af\u30a8\u30b9\u30c8ID\u3092\u751f\u6210\uff08\u8907\u6570\u306e\u30ed\u30b0\u30a8\u30f3\u30c8\u30ea\u3092\u95a2\u9023\u4ed8\u3051\u308b\u305f\u3081\uff09\n    if (!isset($GLOBALS['request_id'])) {\n        $GLOBALS['request_id'] = uniqid('', true);\n    }\n    $log_entry['request_id'] = $GLOBALS['request_id'];\n    \n    \/\/ JSON\u5f62\u5f0f\u3067\u30ed\u30b0\u51fa\u529b\n    error_log(json_encode($log_entry, JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES));\n}\n\n\/\/ \u4f7f\u7528\u4f8b\nlog_structured(\"\u30e6\u30fc\u30b6\u30fc\u652f\u6255\u3044\u51e6\u7406\u958b\u59cb\", \"INFO\", ['user_id' =&gt; 12345, 'amount' =&gt; 9800]);\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-48\">3. \u30ea\u30a2\u30eb\u30bf\u30a4\u30e0\u30a2\u30e9\u30fc\u30c8\u8a2d\u5b9a<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">\u91cd\u8981\u306a\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3057\u305f\u5834\u5408\u306b\u5373\u5ea7\u306b\u901a\u77e5\u3092\u53d7\u3051\u53d6\u308b\u30b7\u30b9\u30c6\u30e0\u3092\u69cb\u7bc9\u3057\u307e\u3059\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">&lt;?php\n\/**\n * \u91cd\u8981\u5ea6\u306b\u5fdc\u3058\u3066\u30a2\u30e9\u30fc\u30c8\u3082\u9001\u4fe1\u3059\u308b\u30ed\u30ac\u30fc\n *\/\nfunction alert_logger($message, $level = 'INFO', $context = []) {\n    \/\/ \u901a\u5e38\u306e\u30ed\u30b0\u8a18\u9332\n    log_structured($message, $level, $context);\n    \n    \/\/ \u91cd\u5927\u306a\u30a8\u30e9\u30fc\u306e\u5834\u5408\u306f\u30a2\u30e9\u30fc\u30c8\u3082\u9001\u4fe1\n    if ($level === 'CRITICAL' || $level === 'EMERGENCY') {\n        \/\/ Slack\u901a\u77e5\u306e\u4f8b\n        $slack_webhook = 'https:\/\/hooks.slack.com\/services\/XXXX\/YYYY\/ZZZZ';\n        $payload = json_encode([\n            'text' =&gt; \"\ud83d\udea8 *{$level} \u30a2\u30e9\u30fc\u30c8* \ud83d\udea8\\n{$message}\\n```\" . json_encode($context, JSON_PRETTY_PRINT | JSON_UNESCAPED_UNICODE) . \"```\",\n            'channel' =&gt; '#server-alerts',\n            'username' =&gt; 'AlertBot',\n            'icon_emoji' =&gt; ':warning:'\n        ]);\n        \n        \/\/ Slack Webhook\u306bPOST\n        $ch = curl_init($slack_webhook);\n        curl_setopt($ch, CURLOPT_CUSTOMREQUEST, \"POST\");\n        curl_setopt($ch, CURLOPT_POSTFIELDS, $payload);\n        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);\n        curl_setopt($ch, CURLOPT_HTTPHEADER, ['Content-Type: application\/json']);\n        curl_exec($ch);\n        curl_close($ch);\n    }\n}\n<\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u9069\u5207\u306a\u30a8\u30e9\u30fc\u30ed\u30b0\u7ba1\u7406\u3092\u5b9f\u88c5\u3059\u308b\u3053\u3068\u3067\u3001\u8907\u6570\u30b5\u30fc\u30d0\u30fc\u74b0\u5883\u3067\u3082\u554f\u984c\u3092\u3059\u3070\u3084\u304f\u7279\u5b9a\u3057\u3001\u5bfe\u5fdc\u3059\u308b\u3053\u3068\u304c\u53ef\u80fd\u306b\u306a\u308a\u307e\u3059\u3002\u6b21\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001\u30d7\u30ed\u30d5\u30a7\u30c3\u30b7\u30e7\u30ca\u30eb\u958b\u767a\u8005\u304c\u5b9f\u8df5\u3059\u308b\u30a8\u30e9\u30fc\u30ed\u30b0\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u306b\u3064\u3044\u3066\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-49\">\u30d7\u30ed\u304c\u5b9f\u8df5\u3059\u308b\uff01PHP error_log\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u3053\u307e\u3067\u3067\u3001PHP error_log\u306e\u57fa\u672c\u7684\u306a\u4f7f\u3044\u65b9\u304b\u3089\u5fdc\u7528\u30c6\u30af\u30cb\u30c3\u30af\u3001\u3088\u304f\u3042\u308b\u30c8\u30e9\u30d6\u30eb\u306e\u89e3\u6c7a\u7b56\u307e\u3067\u898b\u3066\u304d\u307e\u3057\u305f\u3002\u3053\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001\u30d7\u30ed\u30d5\u30a7\u30c3\u30b7\u30e7\u30ca\u30eb\u306a\u958b\u767a\u73fe\u5834\u3067\u5b9f\u8df5\u3055\u308c\u3066\u3044\u308b\u30a8\u30e9\u30fc\u30ed\u30b0\u7ba1\u7406\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002\u3053\u308c\u3089\u306e\u30c6\u30af\u30cb\u30c3\u30af\u3092\u53d6\u308a\u5165\u308c\u308b\u3053\u3068\u3067\u3001\u30c1\u30fc\u30e0\u958b\u767a\u306e\u52b9\u7387\u3068\u54c1\u8cea\u3092\u3055\u3089\u306b\u9ad8\u3081\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u3067\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-50\">\u30a8\u30e9\u30fc\u30ed\u30b0\u306e\u6a19\u6e96\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u3092\u5b9a\u3081\u3066\u30c1\u30fc\u30e0\u958b\u767a\u3092\u52b9\u7387\u5316<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u30c1\u30fc\u30e0\u958b\u767a\u3067\u306f\u3001\u30e1\u30f3\u30d0\u30fc\u5168\u54e1\u304c\u540c\u3058\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u3067\u30ed\u30b0\u3092\u8a18\u9332\u3059\u308b\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002\u6a19\u6e96\u5316\u3055\u308c\u305f\u30ed\u30b0\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u306b\u3088\u308a\u3001\u30ed\u30b0\u306e\u8aad\u307f\u53d6\u308a\u3084\u5206\u6790\u304c\u5bb9\u6613\u306b\u306a\u308a\u3001\u554f\u984c\u89e3\u6c7a\u306e\u30b9\u30d4\u30fc\u30c9\u304c\u5411\u4e0a\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-51\">JSON\u5f62\u5f0f\u306e\u6a19\u6e96\u30ed\u30b0\u30d5\u30a9\u30fc\u30de\u30c3\u30c8<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">&lt;?php\n\/**\n * \u30c1\u30fc\u30e0\u5171\u901a\u306e\u30ed\u30ac\u30fc\u30af\u30e9\u30b9\n *\/\nclass StandardLogger {\n    private $appName;\n    private $environment;\n    \n    public function __construct($appName, $environment = 'production') {\n        $this-&gt;appName = $appName;\n        $this-&gt;environment = $environment;\n    }\n    \n    public function log($message, $level = 'INFO', array $context = []) {\n        $entry = [\n            'timestamp' =&gt; date('Y-m-d\\TH:i:s.vP'),  \/\/ ISO 8601\u5f62\u5f0f\n            'app' =&gt; $this-&gt;appName,\n            'env' =&gt; $this-&gt;environment,\n            'level' =&gt; strtoupper($level),\n            'message' =&gt; $message,\n            'context' =&gt; $context\n        ];\n        \n        \/\/ \u30ea\u30af\u30a8\u30b9\u30c8\u60c5\u5831\u3092\u8ffd\u52a0\n        if (php_sapi_name() !== 'cli' &amp;&amp; isset($_SERVER['REQUEST_URI'])) {\n            $entry['http'] = [\n                'method' =&gt; $_SERVER['REQUEST_METHOD'] ?? 'UNKNOWN',\n                'url' =&gt; (isset($_SERVER['HTTPS']) &amp;&amp; $_SERVER['HTTPS'] === 'on' ? 'https' : 'http') . \n                         ':\/\/' . ($_SERVER['HTTP_HOST'] ?? 'localhost') . \n                         ($_SERVER['REQUEST_URI'] ?? ''),\n                'ip' =&gt; $_SERVER['REMOTE_ADDR'] ?? 'unknown',\n                'user_agent' =&gt; $_SERVER['HTTP_USER_AGENT'] ?? 'unknown'\n            ];\n        }\n        \n        \/\/ \u30ea\u30af\u30a8\u30b9\u30c8ID\u3092\u4ed8\u4e0e\uff08\u5206\u6563\u30c8\u30ec\u30fc\u30b7\u30f3\u30b0\u7528\uff09\n        if (!isset($GLOBALS['request_id'])) {\n            $GLOBALS['request_id'] = substr(md5(uniqid(mt_rand(), true)), 0, 16);\n        }\n        $entry['request_id'] = $GLOBALS['request_id'];\n        \n        \/\/ \u30c7\u30d0\u30c3\u30b0\u30e2\u30fc\u30c9\u306e\u5834\u5408\u306f\u30d5\u30a1\u30a4\u30eb\u3068\u884c\u756a\u53f7\u3082\u8ffd\u52a0\n        if ($this-&gt;environment === 'development' || $this-&gt;environment === 'testing') {\n            $backtrace = debug_backtrace(DEBUG_BACKTRACE_IGNORE_ARGS, 2);\n            $caller = $backtrace[0] ?? [];\n            $entry['file'] = $caller['file'] ?? 'unknown';\n            $entry['line'] = $caller['line'] ?? 0;\n        }\n        \n        \/\/ \u30a8\u30e9\u30fc\u30ec\u30d9\u30eb\u306b\u5fdc\u3058\u3066PHP\u306eerror_log\u306b\u8a18\u9332\n        error_log(json_encode($entry, JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES));\n        return true;\n    }\n    \n    \/\/ PSR-3\u4e92\u63db\u306e\u30e1\u30bd\u30c3\u30c9\n    public function emergency($message, array $context = []) { return $this-&gt;log($message, 'EMERGENCY', $context); }\n    public function alert($message, array $context = []) { return $this-&gt;log($message, 'ALERT', $context); }\n    public function critical($message, array $context = []) { return $this-&gt;log($message, 'CRITICAL', $context); }\n    public function error($message, array $context = []) { return $this-&gt;log($message, 'ERROR', $context); }\n    public function warning($message, array $context = []) { return $this-&gt;log($message, 'WARNING', $context); }\n    public function notice($message, array $context = []) { return $this-&gt;log($message, 'NOTICE', $context); }\n    public function info($message, array $context = []) { return $this-&gt;log($message, 'INFO', $context); }\n    public function debug($message, array $context = []) { return $this-&gt;log($message, 'DEBUG', $context); }\n}\n\n\/\/ \u4f7f\u7528\u4f8b\n$logger = new StandardLogger('billing-service', 'production');\n$logger-&gt;info('\u652f\u6255\u3044\u51e6\u7406\u3092\u958b\u59cb\u3057\u307e\u3057\u305f', ['user_id' =&gt; 12345, 'amount' =&gt; 9800]);\n$logger-&gt;error('\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u63a5\u7d9a\u30a8\u30e9\u30fc', ['exception' =&gt; 'Connection refused']);\n<\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u30c1\u30fc\u30e0\u5185\u3067\u3053\u306e\u3088\u3046\u306a\u30ed\u30ac\u30fc\u30af\u30e9\u30b9\u3092\u5171\u6709\u3057\u3001\u5168\u54e1\u304c\u540c\u3058\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u3067\u30ed\u30b0\u3092\u8a18\u9332\u3059\u308b\u3053\u3068\u3067\u3001\u4ee5\u4e0b\u306e\u30e1\u30ea\u30c3\u30c8\u304c\u5f97\u3089\u308c\u307e\u3059\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u4e00\u8cab\u6027\u306e\u3042\u308b\u8aad\u307f\u3084\u3059\u3044\u30ed\u30b0<\/strong>: \u3059\u3079\u3066\u306e\u30ed\u30b0\u304c\u540c\u3058\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u306a\u306e\u3067\u3001\u958b\u767a\u8005\u306f\u6163\u308c\u305f\u30d1\u30bf\u30fc\u30f3\u3067\u30ed\u30b0\u3092\u8aad\u3080\u3053\u3068\u304c\u3067\u304d\u307e\u3059<\/li>\n\n\n\n<li><strong>\u52b9\u7387\u7684\u306a\u691c\u7d22\u3068\u5206\u6790<\/strong>: \u6a19\u6e96\u5316\u3055\u308c\u305f\u30d5\u30a3\u30fc\u30eb\u30c9\uff08timestamp\u3001level\u3001request_id\u306a\u3069\uff09\u3092\u4f7f\u3063\u3066\u3001\u30ed\u30b0\u3092\u7c21\u5358\u306b\u691c\u7d22\u30fb\u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0\u3067\u304d\u307e\u3059<\/li>\n\n\n\n<li><strong>\u30c8\u30ec\u30fc\u30b5\u30d3\u30ea\u30c6\u30a3\u306e\u5411\u4e0a<\/strong>: \u30ea\u30af\u30a8\u30b9\u30c8ID\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u5206\u6563\u30b7\u30b9\u30c6\u30e0\u5168\u4f53\u3067\u95a2\u9023\u3059\u308b\u30ed\u30b0\u30a8\u30f3\u30c8\u30ea\u3092\u8ffd\u8de1\u3067\u304d\u307e\u3059<\/li>\n<\/ol>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-52\">\u30ed\u30b0\u30ed\u30fc\u30c6\u30fc\u30b7\u30e7\u30f3\u3068\u4fdd\u5b58\u671f\u9593\u306e\u6700\u9069\u306a\u8a2d\u5b9a\u65b9\u6cd5<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u5927\u898f\u6a21\u306a\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3067\u306f\u3001\u30ed\u30b0\u30d5\u30a1\u30a4\u30eb\u304c\u6025\u901f\u306b\u80a5\u5927\u5316\u3057\u3001\u30c7\u30a3\u30b9\u30af\u5bb9\u91cf\u3092\u5727\u8feb\u3059\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002\u9069\u5207\u306a\u30ed\u30b0\u30ed\u30fc\u30c6\u30fc\u30b7\u30e7\u30f3\u6226\u7565\u3092\u5c0e\u5165\u3059\u308b\u3053\u3068\u3067\u3001\u91cd\u8981\u306a\u30ed\u30b0\u3092\u4fdd\u6301\u3057\u3064\u3064\u3001\u30b7\u30b9\u30c6\u30e0\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3082\u7dad\u6301\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-53\">\u81ea\u52d5\u30ed\u30b0\u30ed\u30fc\u30c6\u30fc\u30b7\u30e7\u30f3\u306e\u5b9f\u88c5<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">&lt;?php\n\/**\n * \u81ea\u52d5\u30ed\u30b0\u30ed\u30fc\u30c6\u30fc\u30b7\u30e7\u30f3\u6a5f\u80fd\u3092\u6301\u3064\u30ed\u30ac\u30fc\u30af\u30e9\u30b9\n *\/\nclass RotatingLogger {\n    private $logPath;\n    private $maxSize;        \/\/ \u30d0\u30a4\u30c8\u5358\u4f4d\n    private $maxBackups;     \/\/ \u4fdd\u6301\u3059\u308b\u30d0\u30c3\u30af\u30a2\u30c3\u30d7\u306e\u6570\n    private $compressBackups; \/\/ \u30d0\u30c3\u30af\u30a2\u30c3\u30d7\u3092\u5727\u7e2e\u3059\u308b\u304b\u3069\u3046\u304b\n    \n    public function __construct(\n        $logPath, \n        $maxSize = 10485760, \/\/ 10MB\n        $maxBackups = 14,    \/\/ 2\u9031\u9593\u5206\n        $compressBackups = true\n    ) {\n        $this-&gt;logPath = $logPath;\n        $this-&gt;maxSize = $maxSize;\n        $this-&gt;maxBackups = $maxBackups;\n        $this-&gt;compressBackups = $compressBackups;\n    }\n    \n    public function log($message) {\n        \/\/ \u30ed\u30fc\u30c6\u30fc\u30b7\u30e7\u30f3\u304c\u5fc5\u8981\u304b\u78ba\u8a8d\n        $this-&gt;rotateIfNecessary();\n        \n        \/\/ \u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u8a18\u9332\n        $timestamp = date('Y-m-d H:i:s');\n        return error_log(\"[$timestamp] $message\" . PHP_EOL, 3, $this-&gt;logPath);\n    }\n    \n    private function rotateIfNecessary() {\n        \/\/ \u30d5\u30a1\u30a4\u30eb\u304c\u5b58\u5728\u3057\u306a\u3044\u304b\u3001\u30b5\u30a4\u30ba\u304c\u4e0a\u9650\u672a\u6e80\u306a\u3089\u4f55\u3082\u3057\u306a\u3044\n        if (!file_exists($this-&gt;logPath) || filesize($this-&gt;logPath) &lt; $this-&gt;maxSize) {\n            return;\n        }\n        \n        \/\/ \u6700\u3082\u53e4\u3044\u30d0\u30c3\u30af\u30a2\u30c3\u30d7\u3092\u524a\u9664\uff08\u5fc5\u8981\u306a\u5834\u5408\uff09\n        for ($i = $this-&gt;maxBackups; $i &gt;= 1; $i--) {\n            $oldestBackup = $this-&gt;getBackupFileName($i);\n            if (file_exists($oldestBackup)) {\n                unlink($oldestBackup);\n            }\n        }\n        \n        \/\/ \u65e2\u5b58\u306e\u30d0\u30c3\u30af\u30a2\u30c3\u30d7\u3092\u30b7\u30d5\u30c8\n        for ($i = $this-&gt;maxBackups - 1; $i &gt;= 1; $i--) {\n            $oldFile = $this-&gt;getBackupFileName($i);\n            $newFile = $this-&gt;getBackupFileName($i + 1);\n            if (file_exists($oldFile)) {\n                rename($oldFile, $newFile);\n            }\n        }\n        \n        \/\/ \u73fe\u5728\u306e\u30ed\u30b0\u30d5\u30a1\u30a4\u30eb\u3092\u6700\u521d\u306e\u30d0\u30c3\u30af\u30a2\u30c3\u30d7\u3068\u3057\u3066\u4fdd\u5b58\n        $firstBackup = $this-&gt;getBackupFileName(1);\n        copy($this-&gt;logPath, $firstBackup);\n        \n        \/\/ \u30d0\u30c3\u30af\u30a2\u30c3\u30d7\u3092\u5727\u7e2e\uff08\u30aa\u30d7\u30b7\u30e7\u30f3\uff09\n        if ($this-&gt;compressBackups &amp;&amp; function_exists('gzcompress')) {\n            $content = file_get_contents($firstBackup);\n            $compressed = gzcompress($content, 9);\n            file_put_contents(\"$firstBackup.gz\", $compressed);\n            unlink($firstBackup);\n        }\n        \n        \/\/ \u73fe\u5728\u306e\u30ed\u30b0\u30d5\u30a1\u30a4\u30eb\u3092\u30af\u30ea\u30a2\n        file_put_contents($this-&gt;logPath, '');\n    }\n    \n    private function getBackupFileName($number) {\n        $dirname = dirname($this-&gt;logPath);\n        $basename = basename($this-&gt;logPath);\n        return $dirname . '\/' . $basename . '.' . $number;\n    }\n}\n\n\/\/ \u4f7f\u7528\u4f8b\n$logger = new RotatingLogger('\/var\/log\/myapp\/application.log', 5242880, 30);\n$logger-&gt;log(\"\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u8d77\u52d5\");\n<\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u306e\u5b9f\u88c5\u3067\u306f\u3001\u30ed\u30b0\u30d5\u30a1\u30a4\u30eb\u304c\u6307\u5b9a\u3057\u305f\u30b5\u30a4\u30ba\uff08\u4f8b\uff1a5MB\uff09\u306b\u9054\u3059\u308b\u3068\u81ea\u52d5\u7684\u306b\u30ed\u30fc\u30c6\u30fc\u30b7\u30e7\u30f3\u304c\u884c\u308f\u308c\u3001\u6307\u5b9a\u3057\u305f\u6570\u306e\u30d0\u30c3\u30af\u30a2\u30c3\u30d7\uff08\u4f8b\uff1a30\u65e5\u5206\uff09\u304c\u4fdd\u6301\u3055\u308c\u307e\u3059\u3002\u30d0\u30c3\u30af\u30a2\u30c3\u30d7\u306f\u5fc5\u8981\u306b\u5fdc\u3058\u3066\u5727\u7e2e\u3055\u308c\u3001\u30c7\u30a3\u30b9\u30af\u5bb9\u91cf\u3092\u7bc0\u7d04\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5b9f\u52d9\u3067\u306f\u3001OS\u30ec\u30d9\u30eb\u306e <code>logrotate<\/code> \u306a\u3069\u306e\u30c4\u30fc\u30eb\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3082\u4e00\u822c\u7684\u3067\u3059\u3002\u4ee5\u4e0b\u306f\u3001Linux\u306e <code>logrotate<\/code> \u8a2d\u5b9a\u4f8b\u3067\u3059\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\"># \/etc\/logrotate.d\/php-application\n\/var\/log\/myapp\/*.log {\n    daily\n    rotate 30\n    compress\n    delaycompress\n    missingok\n    notifempty\n    create 0644 www-data www-data\n    sharedscripts\n    postrotate\n        [ -s \/var\/run\/nginx.pid ] &amp;&amp; kill -USR1 `cat \/var\/run\/nginx.pid`\n    endscript\n}\n<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-54\">\u30ed\u30b0\u5206\u6790\u30c4\u30fc\u30eb\u3068\u9023\u643a\u3057\u3066\u30a8\u30e9\u30fc\u691c\u77e5\u3092\u81ea\u52d5\u5316\u3059\u308b<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u84c4\u7a4d\u3055\u308c\u305f\u30ed\u30b0\u30c7\u30fc\u30bf\u3092\u52b9\u679c\u7684\u306b\u6d3b\u7528\u3059\u308b\u305f\u3081\u306b\u3001\u30ed\u30b0\u5206\u6790\u30c4\u30fc\u30eb\u3068\u9023\u643a\u3059\u308b\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002\u73fe\u4ee3\u306e\u958b\u767a\u73fe\u5834\u3067\u306f\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u30ed\u30b0\u5206\u6790\u30c4\u30fc\u30eb\u304c\u3088\u304f\u4f7f\u308f\u308c\u3066\u3044\u307e\u3059\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>ELK Stack\uff08Elasticsearch, Logstash, Kibana\uff09<\/strong>: \u30aa\u30fc\u30d7\u30f3\u30bd\u30fc\u30b9\u306e\u30ed\u30b0\u5206\u6790\u30d7\u30e9\u30c3\u30c8\u30d5\u30a9\u30fc\u30e0<\/li>\n\n\n\n<li><strong>Graylog<\/strong>: \u96c6\u4e2d\u30ed\u30b0\u7ba1\u7406\u3068\u5206\u6790\u306e\u305f\u3081\u306e\u30d7\u30e9\u30c3\u30c8\u30d5\u30a9\u30fc\u30e0<\/li>\n\n\n\n<li><strong>Splunk<\/strong>: \u4f01\u696d\u5411\u3051\u306e\u30ed\u30b0\u5206\u6790\u30bd\u30ea\u30e5\u30fc\u30b7\u30e7\u30f3<\/li>\n\n\n\n<li><strong>Datadog<\/strong>: \u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u30e2\u30cb\u30bf\u30ea\u30f3\u30b0\u3068\u30ed\u30b0\u5206\u6790<\/li>\n\n\n\n<li><strong>Loggly<\/strong>: \u30af\u30e9\u30a6\u30c9\u30d9\u30fc\u30b9\u306e\u30ed\u30b0\u7ba1\u7406\u30b5\u30fc\u30d3\u30b9<\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u308c\u3089\u306e\u30c4\u30fc\u30eb\u3068\u9023\u643a\u3059\u308b\u305f\u3081\u306b\u3001PHP\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u304b\u3089\u30ed\u30b0\u3092\u9069\u5207\u306a\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u3067\u51fa\u529b\u3059\u308b\u4f8b\u3092\u7d39\u4ecb\u3057\u307e\u3059\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">&lt;?php\n\/**\n * ELK Stack\u306b\u9069\u3057\u305f\u5f62\u5f0f\u3067\u30ed\u30b0\u3092\u51fa\u529b\u3059\u308b\u30ed\u30ac\u30fc\n *\/\nclass ElkLogger {\n    private $appName;\n    private $environment;\n    private $logPath;\n    \n    public function __construct($appName, $environment, $logPath = null) {\n        $this-&gt;appName = $appName;\n        $this-&gt;environment = $environment;\n        $this-&gt;logPath = $logPath ?: ini_get('error_log');\n    }\n    \n    public function log($message, $level = 'INFO', array $context = []) {\n        $entry = [\n            '@timestamp' =&gt; date('c'),  \/\/ ISO 8601\u5f62\u5f0f\uff08Elasticsearch\u306e\u6a19\u6e96\uff09\n            'log' =&gt; [\n                'level' =&gt; strtolower($level)\n            ],\n            'message' =&gt; $message,\n            'service' =&gt; [\n                'name' =&gt; $this-&gt;appName,\n                'environment' =&gt; $this-&gt;environment\n            ],\n            'event' =&gt; [\n                'created' =&gt; microtime(true)\n            ],\n            'host' =&gt; [\n                'name' =&gt; gethostname()\n            ],\n            'process' =&gt; [\n                'pid' =&gt; getmypid()\n            ]\n        ];\n        \n        \/\/ \u30b3\u30f3\u30c6\u30ad\u30b9\u30c8\u60c5\u5831\u3092\u30de\u30fc\u30b8\n        if (!empty($context)) {\n            $entry['context'] = $context;\n        }\n        \n        \/\/ HTTP\u30ea\u30af\u30a8\u30b9\u30c8\u60c5\u5831\u3092\u8ffd\u52a0\n        if (php_sapi_name() !== 'cli' &amp;&amp; isset($_SERVER['REQUEST_URI'])) {\n            $entry['http'] = [\n                'request' =&gt; [\n                    'method' =&gt; $_SERVER['REQUEST_METHOD'] ?? 'UNKNOWN',\n                    'url' =&gt; [\n                        'full' =&gt; (isset($_SERVER['HTTPS']) &amp;&amp; $_SERVER['HTTPS'] === 'on' ? 'https' : 'http') . \n                                 ':\/\/' . ($_SERVER['HTTP_HOST'] ?? 'localhost') . \n                                 ($_SERVER['REQUEST_URI'] ?? '')\n                    ]\n                ],\n                'client' =&gt; [\n                    'ip' =&gt; $_SERVER['REMOTE_ADDR'] ?? 'unknown',\n                    'user_agent' =&gt; [\n                        'original' =&gt; $_SERVER['HTTP_USER_AGENT'] ?? 'unknown'\n                    ]\n                ]\n            ];\n        }\n        \n        \/\/ \u30c8\u30ec\u30fc\u30b9ID\u3092\u8ffd\u52a0\uff08\u5206\u6563\u30c8\u30ec\u30fc\u30b7\u30f3\u30b0\u7528\uff09\n        if (!isset($GLOBALS['trace_id'])) {\n            $GLOBALS['trace_id'] = bin2hex(random_bytes(16));\n        }\n        $entry['trace'] = [\n            'id' =&gt; $GLOBALS['trace_id']\n        ];\n        \n        \/\/ JSON\u5f62\u5f0f\u3067\u30ed\u30b0\u51fa\u529b\n        return error_log(json_encode($entry), 3, $this-&gt;logPath);\n    }\n}\n\n\/\/ \u4f7f\u7528\u4f8b\n$logger = new ElkLogger('payment-service', 'production');\n$logger-&gt;log('\u652f\u6255\u3044\u51e6\u7406\u304c\u5b8c\u4e86\u3057\u307e\u3057\u305f', 'INFO', [\n    'user_id' =&gt; 12345,\n    'transaction_id' =&gt; 'tx_987654321',\n    'amount' =&gt; 9800,\n    'currency' =&gt; 'JPY'\n]);\n<\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u306e\u3088\u3046\u306a\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u3067\u30ed\u30b0\u3092\u51fa\u529b\u3059\u308b\u3053\u3068\u3067\u3001Elasticsearch\u306a\u3069\u306e\u30c4\u30fc\u30eb\u3067\u52b9\u679c\u7684\u306b\u691c\u7d22\u30fb\u5206\u6790\u3067\u304d\u307e\u3059\u3002\u30c0\u30c3\u30b7\u30e5\u30dc\u30fc\u30c9\u3092\u69cb\u7bc9\u3057\u3066\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u30a4\u30f3\u30b5\u30a4\u30c8\u3092\u5f97\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30a8\u30e9\u30fc\u767a\u751f\u7387\u306e\u6642\u7cfb\u5217\u63a8\u79fb<\/li>\n\n\n\n<li>\u6700\u3082\u983b\u7e41\u306b\u767a\u751f\u3059\u308b\u30a8\u30e9\u30fc\u306e\u7a2e\u985e<\/li>\n\n\n\n<li>\u30a8\u30f3\u30c9\u30dd\u30a4\u30f3\u30c8\u5225\u30fb\u30b5\u30fc\u30d3\u30b9\u5225\u306e\u30a8\u30e9\u30fc\u5206\u5e03<\/li>\n\n\n\n<li>\u7279\u5b9a\u306e\u30e6\u30fc\u30b6\u30fc\u3084\u30c8\u30e9\u30f3\u30b6\u30af\u30b7\u30e7\u30f3\u306b\u95a2\u9023\u3059\u308b\u30a8\u30e9\u30fc<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-55\">CI\/CD\u30d1\u30a4\u30d7\u30e9\u30a4\u30f3\u306b\u30a8\u30e9\u30fc\u30ed\u30b0\u30c1\u30a7\u30c3\u30af\u3092\u7d44\u307f\u8fbc\u3080\u65b9\u6cd5<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u7d99\u7d9a\u7684\u30a4\u30f3\u30c6\u30b0\u30ec\u30fc\u30b7\u30e7\u30f3\u30fb\u7d99\u7d9a\u7684\u30c7\u30d7\u30ed\u30a4\u30e1\u30f3\u30c8\uff08CI\/CD\uff09\u30d7\u30ed\u30bb\u30b9\u306b\u30a8\u30e9\u30fc\u30ed\u30b0\u30c1\u30a7\u30c3\u30af\u3092\u7d44\u307f\u8fbc\u3080\u3053\u3068\u3067\u3001\u54c1\u8cea\u7ba1\u7406\u3092\u81ea\u52d5\u5316\u3057\u3001\u554f\u984c\u3092\u65e9\u671f\u306b\u767a\u898b\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-56\">GitHubActions\u3067\u306e\u30a8\u30e9\u30fc\u30ed\u30b0\u30c1\u30a7\u30c3\u30af\u4f8b<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\"><code>.github\/workflows\/log-check.yml<\/code> \u30d5\u30a1\u30a4\u30eb\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">name: Error Log Check\n\non:\n  push:\n    branches: [ main, develop ]\n  pull_request:\n    branches: [ main, develop ]\n\njobs:\n  log-check:\n    runs-on: ubuntu-latest\n    \n    steps:\n    - uses: actions\/checkout@v2\n    \n    - name: Set up PHP\n      uses: shivammathur\/setup-php@v2\n      with:\n        php-version: '8.1'\n        \n    - name: Install dependencies\n      run: composer install --prefer-dist --no-progress\n      \n    - name: Run tests with log checking\n      run: |\n        # \u30c6\u30b9\u30c8\u5b9f\u884c\u524d\u306b\u30ed\u30b0\u30d5\u30a1\u30a4\u30eb\u3092\u30af\u30ea\u30a2\n        rm -f .\/storage\/logs\/test.log\n        touch .\/storage\/logs\/test.log\n        \n        # \u30c6\u30b9\u30c8\u3092\u5b9f\u884c\n        php vendor\/bin\/phpunit\n        \n        # \u30ed\u30b0\u30d5\u30a1\u30a4\u30eb\u306b\u30a8\u30e9\u30fc\u304c\u306a\u3044\u304b\u78ba\u8a8d\n        if grep -q -i \"error\\|exception\\|fatal\" .\/storage\/logs\/test.log; then\n          echo \"\u30a8\u30e9\u30fc\u30ed\u30b0\u304c\u691c\u51fa\u3055\u308c\u307e\u3057\u305f:\"\n          grep -i \"error\\|exception\\|fatal\" .\/storage\/logs\/test.log\n          exit 1\n        else\n          echo \"\u30a8\u30e9\u30fc\u30ed\u30b0\u306f\u30af\u30ea\u30fc\u30f3\u3067\u3059\"\n        fi\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-57\">\u30c7\u30d7\u30ed\u30a4\u524d\u306e\u30ed\u30b0\u30c1\u30a7\u30c3\u30af\u30b9\u30af\u30ea\u30d7\u30c8<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">\u30c7\u30d7\u30ed\u30a4\u30b9\u30af\u30ea\u30d7\u30c8\u306e\u4e00\u90e8\u3068\u3057\u3066\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u30ed\u30b0\u30c1\u30a7\u30c3\u30af\u3092\u5b9f\u88c5\u3067\u304d\u307e\u3059\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">&lt;?php\n\/\/ deploy-check.php\n\n\/**\n * \u672c\u756a\u30c7\u30d7\u30ed\u30a4\u524d\u306b\u30a8\u30e9\u30fc\u30ed\u30b0\u3092\u30c1\u30a7\u30c3\u30af\u3059\u308b\u30b9\u30af\u30ea\u30d7\u30c8\n *\/\nfunction checkErrorLogs($logPath, $hours = 24) {\n    if (!file_exists($logPath)) {\n        echo \"\u30ed\u30b0\u30d5\u30a1\u30a4\u30eb\u304c\u898b\u3064\u304b\u308a\u307e\u305b\u3093: $logPath\\n\";\n        return false;\n    }\n    \n    $cutoffTime = time() - ($hours * 3600);\n    $errorCount = 0;\n    $criticalErrors = [];\n    \n    \/\/ \u30ed\u30b0\u30d5\u30a1\u30a4\u30eb\u3092\u89e3\u6790\n    $lines = file($logPath);\n    foreach ($lines as $line) {\n        \/\/ \u30bf\u30a4\u30e0\u30b9\u30bf\u30f3\u30d7\u3092\u62bd\u51fa\u3057\u3066\u6642\u9593\u3092\u30c1\u30a7\u30c3\u30af\n        if (preg_match('\/\\[(.*?)\\]\/', $line, $matches)) {\n            $logTime = strtotime($matches[1]);\n            if ($logTime &gt;= $cutoffTime) {\n                \/\/ \u91cd\u5927\u306a\u30a8\u30e9\u30fc\u3092\u30c1\u30a7\u30c3\u30af\n                if (\n                    stripos($line, 'ERROR') !== false || \n                    stripos($line, 'CRITICAL') !== false || \n                    stripos($line, 'EXCEPTION') !== false || \n                    stripos($line, 'FATAL') !== false\n                ) {\n                    $errorCount++;\n                    $criticalErrors[] = $line;\n                }\n            }\n        }\n    }\n    \n    \/\/ \u7d50\u679c\u3092\u8868\u793a\n    echo \"\u904e\u53bb {$hours} \u6642\u9593\u306b {$errorCount} \u4ef6\u306e\u91cd\u5927\u306a\u30a8\u30e9\u30fc\u304c\u898b\u3064\u304b\u308a\u307e\u3057\u305f\u3002\\n\";\n    \n    if ($errorCount &gt; 0) {\n        echo \"\\n\u6700\u65b0\u306e\u91cd\u5927\u306a\u30a8\u30e9\u30fc:\\n\";\n        foreach (array_slice($criticalErrors, -10) as $error) {\n            echo \" - \" . trim($error) . \"\\n\";\n        }\n        \n        \/\/ \u30a8\u30e9\u30fc\u6570\u304c\u95be\u5024\u3092\u8d85\u3048\u3066\u3044\u305f\u3089\u8b66\u544a\n        if ($errorCount &gt; 5) {\n            echo \"\\n\u8b66\u544a: \u30a8\u30e9\u30fc\u6570\u304c\u591a\u3059\u304e\u307e\u3059\u3002\u30c7\u30d7\u30ed\u30a4\u3092\u518d\u691c\u8a0e\u3057\u3066\u304f\u3060\u3055\u3044\u3002\\n\";\n            return false;\n        }\n    }\n    \n    return true;\n}\n\n\/\/ \u30e1\u30a4\u30f3\u306e\u30c7\u30d7\u30ed\u30a4\u524d\u30c1\u30a7\u30c3\u30af\n$logPaths = [\n    '\/var\/log\/myapp\/errors.log',\n    '\/var\/log\/myapp\/exceptions.log'\n];\n\n$allChecksPass = true;\nforeach ($logPaths as $logPath) {\n    echo \"\u30ed\u30b0\u30d5\u30a1\u30a4\u30eb\u3092\u30c1\u30a7\u30c3\u30af\u4e2d: $logPath\\n\";\n    if (!checkErrorLogs($logPath, 24)) {\n        $allChecksPass = false;\n    }\n    echo \"\\n\";\n}\n\n\/\/ \u3059\u3079\u3066\u306e\u30c1\u30a7\u30c3\u30af\u304c\u30d1\u30b9\u3057\u305f\u304b\u3069\u3046\u304b\u306b\u57fa\u3065\u3044\u3066\u7d42\u4e86\u30b3\u30fc\u30c9\u3092\u8a2d\u5b9a\nexit($allChecksPass ? 0 : 1);\n<\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">CI\/CD\u30d1\u30a4\u30d7\u30e9\u30a4\u30f3\u3067\u3053\u306e\u30b9\u30af\u30ea\u30d7\u30c8\u3092\u5b9f\u884c\u3059\u308b\u3053\u3068\u3067\u3001\u30a8\u30e9\u30fc\u304c\u591a\u767a\u3057\u3066\u3044\u308b\u30b3\u30fc\u30c9\u306e\u30c7\u30d7\u30ed\u30a4\u3092\u9632\u6b62\u3067\u304d\u307e\u3059\u3002\u307e\u305f\u3001\u554f\u984c\u304c\u691c\u51fa\u3055\u308c\u305f\u5834\u5408\u306b\u81ea\u52d5\u7684\u306b\u958b\u767a\u30c1\u30fc\u30e0\u306b\u901a\u77e5\u3059\u308b\u3088\u3046\u8a2d\u5b9a\u3059\u308b\u3053\u3068\u3082\u53ef\u80fd\u3067\u3059\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\">\n\n\n\n<p class=\"wp-block-paragraph\">\u4ee5\u4e0a\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u3092\u53d6\u308a\u5165\u308c\u308b\u3053\u3068\u3067\u3001PHP\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u30a8\u30e9\u30fc\u30ed\u30b0\u7ba1\u7406\u3092\u52b9\u7387\u5316\u3057\u3001\u54c1\u8cea\u3092\u5411\u4e0a\u3055\u305b\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u6a19\u6e96\u5316\u3055\u308c\u305f\u30ed\u30b0\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u3001\u9069\u5207\u306a\u30ed\u30b0\u30ed\u30fc\u30c6\u30fc\u30b7\u30e7\u30f3\u3001\u30ed\u30b0\u5206\u6790\u30c4\u30fc\u30eb\u3068\u306e\u9023\u643a\u3001\u305d\u3057\u3066CI\/CD\u30d7\u30ed\u30bb\u30b9\u3078\u306e\u7d71\u5408\u306b\u3088\u3063\u3066\u3001\u3088\u308a\u5805\u7262\u306a\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u958b\u767a\u304c\u53ef\u80fd\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-58\">PHP error_log\u30de\u30b9\u30bf\u30fc\u3078\u306e\u9053 \u2013 \u5b9f\u8df5\u3067\u6d3b\u304b\u3059\u305f\u3081\u306e\u307e\u3068\u3081<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u3053\u307e\u3067\u3001PHP error_log\u306e\u57fa\u672c\u304b\u3089\u9ad8\u5ea6\u306a\u6d3b\u7528\u30c6\u30af\u30cb\u30c3\u30af\u3001\u305d\u3057\u3066\u73fe\u5834\u3067\u6d3b\u7528\u3059\u308b\u305f\u3081\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u307e\u3067\u5e45\u5e83\u304f\u89e3\u8aac\u3057\u3066\u304d\u307e\u3057\u305f\u3002\u3053\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001\u672c\u8a18\u4e8b\u3067\u7d39\u4ecb\u3057\u305f13\u306e\u30c6\u30af\u30cb\u30c3\u30af\u3092\u6574\u7406\u3057\u3001\u660e\u65e5\u304b\u3089\u5b9f\u8df5\u3059\u308b\u305f\u3081\u306e\u30c1\u30a7\u30c3\u30af\u30ea\u30b9\u30c8\u3092\u63d0\u4f9b\u3057\u307e\u3059\u3002\u307e\u305f\u3001PHP error_log\u4ee5\u5916\u306e\u30c7\u30d0\u30c3\u30b0\u6280\u8853\u306b\u3064\u3044\u3066\u3082\u5b66\u3079\u308b\u30ea\u30bd\u30fc\u30b9\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-59\">13\u306e\u30c6\u30af\u30cb\u30c3\u30af\u3092\u660e\u65e5\u304b\u3089\u5b9f\u8df5\u3059\u308b\u305f\u3081\u306e\u30c1\u30a7\u30c3\u30af\u30ea\u30b9\u30c8<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u4ee5\u4e0b\u306e\u30c1\u30a7\u30c3\u30af\u30ea\u30b9\u30c8\u3092\u4f7f\u3063\u3066\u3001PHP error_log\u306e\u6d3b\u7528\u30ec\u30d9\u30eb\u3092\u6bb5\u968e\u7684\u306b\u9ad8\u3081\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002\u57fa\u672c\u7684\u306a\u30c6\u30af\u30cb\u30c3\u30af\u304b\u3089\u59cb\u3081\u3066\u3001\u5f90\u3005\u306b\u9ad8\u5ea6\u306a\u30c6\u30af\u30cb\u30c3\u30af\u3092\u53d6\u308a\u5165\u308c\u308b\u3053\u3068\u3092\u304a\u3059\u3059\u3081\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-60\">\u57fa\u672c\u30ec\u30d9\u30eb\uff08\u3059\u3050\u306b\u5b9f\u8df5\u3067\u304d\u308b\u30c6\u30af\u30cb\u30c3\u30af\uff09<\/h4>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u30a8\u30e9\u30fc\u30ed\u30b0\u306e\u57fa\u672c\u8a2d\u5b9a\u3092\u78ba\u8a8d\u3059\u308b<\/strong>\n<ul class=\"wp-block-list\">\n<li>[ ] php.ini\u306elog_errors\u8a2d\u5b9a\u304cOn\u306b\u306a\u3063\u3066\u3044\u308b\u304b\u78ba\u8a8d<\/li>\n\n\n\n<li>[ ] error_log\u8a2d\u5b9a\u3067\u30ed\u30b0\u30d5\u30a1\u30a4\u30eb\u306e\u5834\u6240\u304c\u9069\u5207\u306b\u8a2d\u5b9a\u3055\u308c\u3066\u3044\u308b\u304b\u78ba\u8a8d<\/li>\n\n\n\n<li>[ ] \u958b\u767a\u74b0\u5883\u3067\u306fdisplay_errors=On\u3001\u672c\u756a\u74b0\u5883\u3067\u306fdisplay_errors=Off\u306b\u8a2d\u5b9a<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>\u30b7\u30f3\u30d7\u30eb\u306a\u30a8\u30e9\u30fc\u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u30ed\u30b0\u306b\u8a18\u9332\u3059\u308b<\/strong>\n<ul class=\"wp-block-list\">\n<li>[ ] \u57fa\u672c\u7684\u306aerror_log\u95a2\u6570\u306e\u4f7f\u3044\u65b9\u3092\u30de\u30b9\u30bf\u30fc<\/li>\n\n\n\n<li>[ ] \u30e1\u30c3\u30bb\u30fc\u30b8\u306b\u65e5\u6642\u3092\u542b\u3081\u308b\u3088\u3046\u306b\u3059\u308b<\/li>\n\n\n\n<li>[ ] \u30a8\u30e9\u30fc\u756a\u53f7\u3084\u8a73\u7d30\u60c5\u5831\u3092\u542b\u3081\u305f\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u3092\u5b9a\u3081\u308b<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>\u5909\u6570\u306e\u5185\u5bb9\u3092\u52b9\u679c\u7684\u306b\u30ed\u30b0\u51fa\u529b\u3059\u308b<\/strong>\n<ul class=\"wp-block-list\">\n<li>[ ] var_export()\u3092\u4f7f\u3063\u3066\u5909\u6570\u306e\u5185\u5bb9\u3092\u30ed\u30b0\u306b\u8a18\u9332<\/li>\n\n\n\n<li>[ ] \u5909\u6570\u306e\u578b\u60c5\u5831\u3082\u542b\u3081\u3066\u8a18\u9332<\/li>\n\n\n\n<li>[ ] JSON\u30a8\u30f3\u30b3\u30fc\u30c9\u3092\u4f7f\u3063\u3066\u8907\u96d1\u306a\u30c7\u30fc\u30bf\u69cb\u9020\u3092\u8aad\u307f\u3084\u3059\u304f\u51fa\u529b<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>\u74b0\u5883\u306b\u9069\u3057\u305f\u30ed\u30b0\u8a2d\u5b9a\u3092\u4f7f\u3044\u5206\u3051\u308b<\/strong>\n<ul class=\"wp-block-list\">\n<li>[ ] \u958b\u767a\u74b0\u5883\u3067\u306f\u8a73\u7d30\u306a\u30c7\u30d0\u30c3\u30b0\u60c5\u5831\u3092\u51fa\u529b<\/li>\n\n\n\n<li>[ ] \u672c\u756a\u74b0\u5883\u3067\u306f\u91cd\u8981\u306a\u30a8\u30e9\u30fc\u306e\u307f\u3092\u8a18\u9332<\/li>\n\n\n\n<li>[ ] \u30c6\u30b9\u30c8\u74b0\u5883\u3067\u306f\u3059\u3079\u3066\u306e\u30a8\u30e9\u30fc\u3092\u8a18\u9332\u3057\u81ea\u52d5\u30c1\u30a7\u30c3\u30af\u3092\u5b9f\u65bd<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-61\">\u4e2d\u7d1a\u30ec\u30d9\u30eb\uff08\u30c1\u30fc\u30e0\u958b\u767a\u3067\u6d3b\u7528\u3059\u308b\u30c6\u30af\u30cb\u30c3\u30af\uff09<\/h4>\n\n\n\n<ol start=\"5\" class=\"wp-block-list\">\n<li><strong>\u30c7\u30d0\u30c3\u30b0\u60c5\u5831\u3092\u69cb\u9020\u5316\u3057\u3066\u8a18\u9332\u3059\u308b<\/strong>\n<ul class=\"wp-block-list\">\n<li>[ ] JSON\u5f62\u5f0f\u3067\u30ed\u30b0\u3092\u51fa\u529b\u3059\u308b\u30d8\u30eb\u30d1\u30fc\u95a2\u6570\u3092\u4f5c\u6210<\/li>\n\n\n\n<li>[ ] \u30ea\u30af\u30a8\u30b9\u30c8\u60c5\u5831\u3092\u81ea\u52d5\u7684\u306b\u4ed8\u52a0\u3059\u308b\u4ed5\u7d44\u307f\u3092\u5c0e\u5165<\/li>\n\n\n\n<li>[ ] \u30b3\u30f3\u30c6\u30ad\u30b9\u30c8\u60c5\u5831\uff08\u30e6\u30fc\u30b6\u30fcID\u3001\u30c8\u30e9\u30f3\u30b6\u30af\u30b7\u30e7\u30f3ID\u306a\u3069\uff09\u3092\u4f53\u7cfb\u7684\u306b\u8a18\u9332<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u8a08\u6e2c\u306b\u30ed\u30b0\u3092\u6d3b\u7528\u3059\u308b<\/strong>\n<ul class=\"wp-block-list\">\n<li>[ ] \u51e6\u7406\u6642\u9593\u3092\u30ed\u30b0\u306b\u8a18\u9332\u3059\u308b\u6a5f\u80fd\u3092\u5b9f\u88c5<\/li>\n\n\n\n<li>[ ] \u30e1\u30e2\u30ea\u4f7f\u7528\u91cf\u3092\u76e3\u8996\u3057\u3066\u30ed\u30b0\u306b\u8a18\u9332<\/li>\n\n\n\n<li>[ ] \u91cd\u8981\u306a\u51e6\u7406\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6307\u6a19\u3092\u5b9a\u671f\u7684\u306b\u5206\u6790<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>\u30a8\u30e9\u30fc\u30ec\u30d9\u30eb\u306b\u5fdc\u3058\u3066\u30ed\u30b0\u3092\u4f7f\u3044\u5206\u3051\u308b<\/strong>\n<ul class=\"wp-block-list\">\n<li>[ ] PSR-3\u4e92\u63db\u306e\u30ed\u30b0\u30ec\u30d9\u30eb\u3092\u5b9f\u88c5<\/li>\n\n\n\n<li>[ ] \u74b0\u5883\u306b\u5fdc\u3058\u3066\u30ed\u30b0\u30ec\u30d9\u30eb\u306e\u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0\u3092\u8a2d\u5b9a<\/li>\n\n\n\n<li>[ ] \u91cd\u8981\u5ea6\u306b\u5fdc\u3058\u305f\u901a\u77e5\u30e1\u30ab\u30cb\u30ba\u30e0\u3092\u5c0e\u5165<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>\u30d0\u30c3\u30af\u30c8\u30ec\u30fc\u30b9\u60c5\u5831\u3092\u542b\u3081\u305f\u30a8\u30e9\u30fc\u30ed\u30b0\u53d6\u5f97<\/strong>\n<ul class=\"wp-block-list\">\n<li>[ ] debug_backtrace()\u3092\u4f7f\u7528\u3057\u3066\u547c\u3073\u51fa\u3057\u5c65\u6b74\u3092\u8a18\u9332<\/li>\n\n\n\n<li>[ ] \u30a8\u30e9\u30fc\u767a\u751f\u7b87\u6240\u306e\u7279\u5b9a\u3092\u5bb9\u6613\u306b\u3059\u308b\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u3092\u5b9a\u7fa9<\/li>\n\n\n\n<li>[ ] \u4f8b\u5916\u51e6\u7406\u3068\u9023\u643a\u3057\u305f\u30d0\u30c3\u30af\u30c8\u30ec\u30fc\u30b9\u8a18\u9332\u306e\u4ed5\u7d44\u307f\u3092\u69cb\u7bc9<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>\u30ed\u30b0\u30d5\u30a1\u30a4\u30eb\u306e\u9069\u5207\u306a\u30ed\u30fc\u30c6\u30fc\u30b7\u30e7\u30f3\u8a2d\u5b9a<\/strong>\n<ul class=\"wp-block-list\">\n<li>[ ] logrotate\u306a\u3069\u306e\u30c4\u30fc\u30eb\u3067\u30ed\u30b0\u30ed\u30fc\u30c6\u30fc\u30b7\u30e7\u30f3\u3092\u8a2d\u5b9a<\/li>\n\n\n\n<li>[ ] \u74b0\u5883\u306b\u5fdc\u3058\u305f\u4fdd\u5b58\u671f\u9593\u3092\u8a2d\u5b9a<\/li>\n\n\n\n<li>[ ] \u53e4\u3044\u30ed\u30b0\u306e\u5727\u7e2e\u3068\u81ea\u52d5\u524a\u9664\u306e\u4ed5\u7d44\u307f\u3092\u5c0e\u5165<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-62\">\u4e0a\u7d1a\u30ec\u30d9\u30eb\uff08\u30d7\u30ed\u30d5\u30a7\u30c3\u30b7\u30e7\u30ca\u30eb\u304c\u5b9f\u8df5\u3059\u308b\u30c6\u30af\u30cb\u30c3\u30af\uff09<\/h4>\n\n\n\n<ol start=\"10\" class=\"wp-block-list\">\n<li><strong>\u6a19\u6e96\u30ed\u30b0\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u306e\u5b9a\u7fa9\u3068\u9075\u5b88<\/strong>\n<ul class=\"wp-block-list\">\n<li>[ ] \u30c1\u30fc\u30e0\u5168\u4f53\u3067\u4f7f\u7528\u3059\u308b\u6a19\u6e96\u30ed\u30b0\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u3092\u5b9a\u7fa9<\/li>\n\n\n\n<li>[ ] \u5171\u901a\u306e\u30ed\u30ac\u30fc\u30af\u30e9\u30b9\u3092\u4f5c\u6210\u3057\u3066\u30c1\u30fc\u30e0\u5185\u3067\u5171\u6709<\/li>\n\n\n\n<li>[ ] \u30b3\u30fc\u30c9\u30ec\u30d3\u30e5\u30fc\u3067\u6a19\u6e96\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u306e\u9075\u5b88\u3092\u78ba\u8a8d<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>\u30ed\u30b0\u5206\u6790\u30c4\u30fc\u30eb\u3068\u306e\u9023\u643a<\/strong>\n<ul class=\"wp-block-list\">\n<li>[ ] ELK Stack\u3084Graylog\u306a\u3069\u306e\u30ed\u30b0\u5206\u6790\u30c4\u30fc\u30eb\u3092\u5c0e\u5165<\/li>\n\n\n\n<li>[ ] \u5206\u6790\u30c4\u30fc\u30eb\u306b\u6700\u9069\u5316\u3055\u308c\u305f\u30ed\u30b0\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u3092\u4f7f\u7528<\/li>\n\n\n\n<li>[ ] \u30c0\u30c3\u30b7\u30e5\u30dc\u30fc\u30c9\u3067\u30ea\u30a2\u30eb\u30bf\u30a4\u30e0\u306b\u30a8\u30e9\u30fc\u72b6\u6cc1\u3092\u76e3\u8996<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>\u30a8\u30e9\u30fc\u691c\u77e5\u306e\u81ea\u52d5\u5316<\/strong>\n<ul class=\"wp-block-list\">\n<li>[ ] \u91cd\u8981\u306a\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3057\u305f\u969b\u306e\u81ea\u52d5\u901a\u77e5\u3092\u8a2d\u5b9a<\/li>\n\n\n\n<li>[ ] \u30a8\u30e9\u30fc\u30d1\u30bf\u30fc\u30f3\u306e\u691c\u51fa\u3068\u5206\u6790\u306e\u81ea\u52d5\u5316<\/li>\n\n\n\n<li>[ ] \u30a8\u30e9\u30fc\u767a\u751f\u7387\u306e\u63a8\u79fb\u3092\u76e3\u8996\u3059\u308b\u4ed5\u7d44\u307f\u3092\u69cb\u7bc9<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>CI\/CD\u30d1\u30a4\u30d7\u30e9\u30a4\u30f3\u3068\u306e\u7d71\u5408<\/strong>\n<ul class=\"wp-block-list\">\n<li>[ ] \u30c7\u30d7\u30ed\u30a4\u524d\u306e\u30a8\u30e9\u30fc\u30ed\u30b0\u30c1\u30a7\u30c3\u30af\u3092\u81ea\u52d5\u5316<\/li>\n\n\n\n<li>[ ] \u30a8\u30e9\u30fc\u304c\u591a\u767a\u3059\u308b\u30b3\u30fc\u30c9\u306e\u30c7\u30d7\u30ed\u30a4\u3092\u30d6\u30ed\u30c3\u30af<\/li>\n\n\n\n<li>[ ] \u30c6\u30b9\u30c8\u5b9f\u884c\u6642\u306e\u30a8\u30e9\u30fc\u30ed\u30b0\u3092\u81ea\u52d5\u5206\u6790<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u308c\u3089\u306e\u30c6\u30af\u30cb\u30c3\u30af\u3092\u6bb5\u968e\u7684\u306b\u5c0e\u5165\u3059\u308b\u3053\u3068\u3067\u3001PHP error_log\u306e\u6d3b\u7528\u30ec\u30d9\u30eb\u3092\u7740\u5b9f\u306b\u9ad8\u3081\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u81ea\u5206\u306e\u958b\u767a\u30b9\u30bf\u30a4\u30eb\u3084\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306e\u72b6\u6cc1\u306b\u5408\u308f\u305b\u3066\u3001\u6700\u9069\u306a\u30c6\u30af\u30cb\u30c3\u30af\u3092\u9078\u629e\u3057\u5b9f\u8df5\u3057\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-63\">\u3055\u3089\u306a\u308bPHP\u30c7\u30d0\u30c3\u30b0\u6280\u8853\u3092\u5b66\u3076\u305f\u3081\u306e\u30ea\u30bd\u30fc\u30b9\u7d39\u4ecb<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">PHP error_log\u4ee5\u5916\u306b\u3082\u3001PHP\u306b\u306f\u591a\u69d8\u306a\u30c7\u30d0\u30c3\u30b0\u6280\u8853\u304c\u3042\u308a\u307e\u3059\u3002\u4ee5\u4e0b\u306e\u30ea\u30bd\u30fc\u30b9\u3092\u6d3b\u7528\u3057\u3066\u3001\u3055\u3089\u306b\u30c7\u30d0\u30c3\u30b0\u30b9\u30ad\u30eb\u3092\u5411\u4e0a\u3055\u305b\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-64\">1. \u30c7\u30d0\u30c3\u30b0\u30c4\u30fc\u30eb<\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Xdebug<\/strong>: PHP\u306e\u30c7\u30d0\u30c3\u30b0\u3068\u30d7\u30ed\u30d5\u30a1\u30a4\u30ea\u30f3\u30b0\u3092\u884c\u3046\u5f37\u529b\u306a\u62e1\u5f35\u6a5f\u80fd\n<ul class=\"wp-block-list\">\n<li>\u516c\u5f0f\u30b5\u30a4\u30c8: <a href=\"https:\/\/xdebug.org\/\">https:\/\/xdebug.org\/<\/a><\/li>\n\n\n\n<li>\u4e3b\u306a\u6a5f\u80fd: \u30b9\u30c6\u30c3\u30d7\u5b9f\u884c\u30c7\u30d0\u30c3\u30b0\u3001\u30b3\u30fc\u30c9\u30ab\u30d0\u30ec\u30c3\u30b8\u5206\u6790\u3001\u30d7\u30ed\u30d5\u30a1\u30a4\u30ea\u30f3\u30b0<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>PHP Debug Bar<\/strong>: \u30d6\u30e9\u30a6\u30b6\u4e0a\u3067\u30c7\u30d0\u30c3\u30b0\u60c5\u5831\u3092\u8868\u793a\u3059\u308b\u30c4\u30fc\u30eb\n<ul class=\"wp-block-list\">\n<li>GitHub: <a href=\"https:\/\/github.com\/maximebf\/php-debugbar\">https:\/\/github.com\/maximebf\/php-debugbar<\/a><\/li>\n\n\n\n<li>\u7279\u5fb4: \u30ea\u30af\u30a8\u30b9\u30c8\u60c5\u5831\u3001\u30af\u30a8\u30ea\u3001\u30bf\u30a4\u30e0\u30e9\u30a4\u30f3\u3001\u30ed\u30b0\u306a\u3069\u3092\u8996\u899a\u7684\u306b\u8868\u793a<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>Monolog<\/strong>: \u67d4\u8edf\u3067\u62e1\u5f35\u6027\u306e\u9ad8\u3044\u30ed\u30ae\u30f3\u30b0\u30e9\u30a4\u30d6\u30e9\u30ea\n<ul class=\"wp-block-list\">\n<li>GitHub: <a href=\"https:\/\/github.com\/Seldaek\/monolog\">https:\/\/github.com\/Seldaek\/monolog<\/a><\/li>\n\n\n\n<li>\u7279\u5fb4: \u591a\u69d8\u306a\u30cf\u30f3\u30c9\u30e9\u3001\u30d5\u30a9\u30fc\u30de\u30c3\u30bf\u3001\u30d7\u30ed\u30bb\u30c3\u30b5\u3092\u63d0\u4f9b<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-65\">2. \u30aa\u30f3\u30e9\u30a4\u30f3\u5b66\u7fd2\u30ea\u30bd\u30fc\u30b9<\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>PHP\u516c\u5f0f\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\uff08\u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0\u30bb\u30af\u30b7\u30e7\u30f3\uff09<\/strong>:\n<ul class=\"wp-block-list\">\n<li>URL: <a href=\"https:\/\/www.php.net\/manual\/ja\/book.errorfunc.php\">https:\/\/www.php.net\/manual\/ja\/book.errorfunc.php<\/a><\/li>\n\n\n\n<li>\u5185\u5bb9: \u30a8\u30e9\u30fc\u51e6\u7406\u306b\u95a2\u3059\u308b\u516c\u5f0f\u30ea\u30d5\u30a1\u30ec\u30f3\u30b9<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>PHP: The Right Way<\/strong>:\n<ul class=\"wp-block-list\">\n<li>URL: <a href=\"https:\/\/phptherightway.com\/\">https:\/\/phptherightway.com\/<\/a><\/li>\n\n\n\n<li>\u5185\u5bb9: \u30e2\u30c0\u30f3\u306aPHP\u958b\u767a\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\uff08\u30a8\u30e9\u30fc\u51e6\u7406\u3092\u542b\u3080\uff09<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>Laracasts<\/strong>:\n<ul class=\"wp-block-list\">\n<li>URL: <a href=\"https:\/\/laracasts.com\/\">https:\/\/laracasts.com\/<\/a><\/li>\n\n\n\n<li>\u5185\u5bb9: PHP\u3068Laravel\u306b\u95a2\u3059\u308b\u9ad8\u54c1\u8cea\u306a\u52d5\u753b\u30c1\u30e5\u30fc\u30c8\u30ea\u30a2\u30eb<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-66\">3. \u66f8\u7c4d<\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u5b9f\u8df5\u7684\u306aPHP\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0<\/strong>\n<ul class=\"wp-block-list\">\n<li>\u5185\u5bb9: \u30a8\u30e9\u30fc\u51e6\u7406\u3001\u30c7\u30d0\u30c3\u30b0\u3001\u30ed\u30b0\u7ba1\u7406\u306a\u3069\u306e\u5b9f\u8df5\u7684\u306a\u30c8\u30d4\u30c3\u30af\u3092\u7db2\u7f85<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>PHP\u8a2d\u8a08\u30d1\u30bf\u30fc\u30f3\u5165\u9580<\/strong>\n<ul class=\"wp-block-list\">\n<li>\u5185\u5bb9: \u30a8\u30e9\u30fc\u51e6\u7406\u3068\u30ed\u30ae\u30f3\u30b0\u3092\u542b\u3080\u5805\u7262\u306aPHP\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u8a2d\u8a08\u306e\u65b9\u6cd5<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>\u30de\u30b9\u30bf\u30ea\u30f3\u30b0PHP\u30c7\u30d0\u30c3\u30b0<\/strong>\n<ul class=\"wp-block-list\">\n<li>\u5185\u5bb9: PHP\u306e\u30c7\u30d0\u30c3\u30b0\u30c4\u30fc\u30eb\u3068\u6280\u8853\u3092\u5305\u62ec\u7684\u306b\u89e3\u8aac<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-67\">4. \u30b3\u30df\u30e5\u30cb\u30c6\u30a3\u3068\u30d5\u30a9\u30fc\u30e9\u30e0<\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>PHP.net\u516c\u5f0f\u30d5\u30a9\u30fc\u30e9\u30e0<\/strong>:\n<ul class=\"wp-block-list\">\n<li>URL: <a href=\"https:\/\/www.php.net\/support.php\">https:\/\/www.php.net\/support.php<\/a><\/li>\n\n\n\n<li>\u7279\u5fb4: PHP\u30b3\u30df\u30e5\u30cb\u30c6\u30a3\u306b\u3088\u308b\u8cea\u7591\u5fdc\u7b54<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>Stack Overflow\uff08PHP\u30bf\u30b0\uff09<\/strong>:\n<ul class=\"wp-block-list\">\n<li>URL: <a href=\"https:\/\/stackoverflow.com\/questions\/tagged\/php\">https:\/\/stackoverflow.com\/questions\/tagged\/php<\/a><\/li>\n\n\n\n<li>\u7279\u5fb4: \u5b9f\u8df5\u7684\u306aPHP\u554f\u984c\u3068\u89e3\u6c7a\u7b56<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>PHP Developers Japan\uff08\u65e5\u672c\u8a9e\uff09<\/strong>:\n<ul class=\"wp-block-list\">\n<li>\u7279\u5fb4: \u65e5\u672c\u8a9e\u3067\u306ePHP\u6280\u8853\u60c5\u5831\u4ea4\u63db<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u308c\u3089\u306e\u30ea\u30bd\u30fc\u30b9\u3092\u6d3b\u7528\u3057\u3066\u3001PHP\u306e\u30c7\u30d0\u30c3\u30b0\u6280\u8853\u3092\u7d99\u7d9a\u7684\u306b\u5b66\u3093\u3067\u3044\u304f\u3053\u3068\u3092\u304a\u3059\u3059\u3081\u3057\u307e\u3059\u3002PHP error_log\u306e\u57fa\u672c\u3092\u7fd2\u5f97\u3057\u305f\u5f8c\u306f\u3001\u3088\u308a\u9ad8\u5ea6\u306a\u30c7\u30d0\u30c3\u30b0\u30c4\u30fc\u30eb\u3084\u30c6\u30af\u30cb\u30c3\u30af\u3092\u53d6\u308a\u5165\u308c\u308b\u3053\u3068\u3067\u3001\u3055\u3089\u306b\u52b9\u7387\u7684\u3067\u54c1\u8cea\u306e\u9ad8\u3044\u958b\u767a\u304c\u53ef\u80fd\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\">\n\n\n\n<p class=\"wp-block-paragraph\">\u672c\u8a18\u4e8b\u3067\u306f\u3001PHP error_log\u306e\u57fa\u672c\u304b\u3089\u5fdc\u7528\u307e\u3067\u300113\u306e\u5b9f\u8df5\u30c6\u30af\u30cb\u30c3\u30af\u3092\u7d39\u4ecb\u3057\u307e\u3057\u305f\u3002\u3053\u308c\u3089\u306e\u30c6\u30af\u30cb\u30c3\u30af\u3092\u65e5\u3005\u306e\u958b\u767a\u306b\u53d6\u308a\u5165\u308c\u308b\u3053\u3068\u3067\u3001\u30c7\u30d0\u30c3\u30b0\u52b9\u7387\u306e\u5411\u4e0a\u3001\u30b3\u30fc\u30c9\u54c1\u8cea\u306e\u6539\u5584\u3001\u305d\u3057\u3066\u30c1\u30fc\u30e0\u958b\u767a\u306e\u5186\u6ed1\u5316\u304c\u671f\u5f85\u3067\u304d\u307e\u3059\u3002\u660e\u65e5\u304b\u3089\u65e9\u901f\u5b9f\u8df5\u3057\u3066\u3001PHP\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u958b\u767a\u306e\u52b9\u7387\u3068\u54c1\u8cea\u3092\u9ad8\u3081\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n","protected":false},"excerpt":{"rendered":"<p>PHP\u3067\u306e\u958b\u767a\u4e2d\u306b\u5947\u5999\u306a\u52d5\u4f5c\u304c\u767a\u751f\u3057\u305f\u308a\u3001\u672c\u756a\u74b0\u5883\u3067\u4e88\u671f\u305b\u306c\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3057\u305f\u308a\u3057\u305f\u7d4c\u9a13\u306f\u3042\u308a\u307e\u305b\u3093\u304b\uff1f\u305d\u3093\u306a\u3068\u304d\u3001\u591a\u304f\u306e\u958b\u767a\u8005\u306f\u30d6\u30e9\u30a6\u30b6\u306b\u8868\u793a\u3055\u308c\u308b\u30a8\u30e9\u30fc\u30e1\u30c3\u30bb\u30fc\u30b8\u306b\u983c\u308a\u304c\u3061\u3067\u3059\u304c\u3001\u305d\u308c\u3060\u3051\u3067\u306f\u6839\u672c\u7684\u306a\u554f\u984c\u89e3\u6c7a\u306b\u306f\u306a\u308a\u307e &#8230; <\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[12],"tags":[],"class_list":["post-3760","post","type-post","status-publish","format-standard","category-php","nothumb"],"_links":{"self":[{"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=\/wp\/v2\/posts\/3760","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=3760"}],"version-history":[{"count":1,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=\/wp\/v2\/posts\/3760\/revisions"}],"predecessor-version":[{"id":3761,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=\/wp\/v2\/posts\/3760\/revisions\/3761"}],"wp:attachment":[{"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=3760"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=3760"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=3760"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}