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IntlDateFormatter\u3092\u4f7f\u7528\u3059\u308b\u306b\u306f\u3001PHP\u306bIntl\u62e1\u5f35\u30e2\u30b8\u30e5\u30fc\u30eb\u304c\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u3055\u308c\u3066\u3044\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u307e\u305a\u306fIntlDateFormatter\u306e\u57fa\u672c\u7684\u306a\u4f7f\u3044\u65b9\u3092\u898b\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n IntlDateFormatter\u306b\u306f\u3001\u65e5\u4ed8\u3068\u6642\u523b\u306e\u8868\u793a\u30b9\u30bf\u30a4\u30eb\u3092\u6307\u5b9a\u3059\u308b\u305f\u3081\u306e\u5b9a\u6570\u304c\u7528\u610f\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n \u591a\u8a00\u8a9e\u30b5\u30a4\u30c8\u3067\u306f\u3001\u30e6\u30fc\u30b6\u30fc\u306e\u8a00\u8a9e\u8a2d\u5b9a\u306b\u5fdc\u3058\u3066\u65e5\u4ed8\u8868\u793a\u3092\u5207\u308a\u66ff\u3048\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u4ee5\u4e0b\u306b\u3001\u305d\u306e\u5b9f\u88c5\u65b9\u6cd5\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n\n\n\n IntlDateFormatter\u3067\u306f\u3001\u30ab\u30b9\u30bf\u30e0\u30d1\u30bf\u30fc\u30f3\u3092\u4f7f\u7528\u3057\u3066\u7d30\u304b\u304f\u65e5\u4ed8\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u3092\u5236\u5fa1\u3059\u308b\u3053\u3068\u3082\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n \u7570\u306a\u308b\u30ab\u30ec\u30f3\u30c0\u30fc\u30b7\u30b9\u30c6\u30e0\uff08\u30a4\u30b9\u30e9\u30e0\u66a6\u3001\u4ecf\u66a6\u306a\u3069\uff09\u306b\u3082\u5bfe\u5fdc\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n 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PHP\u306b\u306f\u3055\u307e\u3056\u307e\u306a\u65e5\u4ed8\u95a2\u6570\u304c\u3042\u308a\u307e\u3059\u304c\u3001\u305d\u308c\u305e\u308c\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u7279\u6027\u304c\u7570\u306a\u308a\u307e\u3059\u3002\u4e00\u822c\u7684\u306b\u3001\u4ee5\u4e0b\u306e\u9806\u3067\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u304c\u826f\u3044\u3068\u3055\u308c\u3066\u3044\u307e\u3059\uff08\u901f\u3044\u9806\uff09\u3002<\/p>\n\n\n\n \u65e5\u4ed8\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u51e6\u7406\u306f\u3001\u540c\u3058\u65e5\u4ed8\u3092\u7e70\u308a\u8fd4\u3057\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u3059\u308b\u3053\u3068\u304c\u591a\u3044\u305f\u3081\u3001\u30ad\u30e3\u30c3\u30b7\u30f3\u30b0\u304c\u52b9\u679c\u7684\u3067\u3059\u3002<\/p>\n\n\n\n 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8.0\u4ee5\u964d\u3067\u306e\u65e5\u4ed8\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u306e\u65b0\u6a5f\u80fd\u3068\u6539\u5584\u70b9\u306b\u3064\u3044\u3066\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n\n\n\n PHP 8.0\u4ee5\u964d\u3001\u65e5\u4ed8\u30fb\u6642\u523b\u51e6\u7406\u306b\u95a2\u3057\u3066\u3044\u304f\u3064\u304b\u306e\u91cd\u8981\u306a\u6539\u5584\u3068\u65b0\u6a5f\u80fd\u304c\u5c0e\u5165\u3055\u308c\u307e\u3057\u305f\u3002\u3053\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001\u6700\u65b0\u30d0\u30fc\u30b8\u30e7\u30f3\u306ePHP\u3067\u5229\u7528\u3067\u304d\u308b\u65e5\u4ed8\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u306e\u6539\u5584\u70b9\u3068\u3001\u5b9f\u8df5\u7684\u306a\u6d3b\u7528\u6cd5\u306b\u3064\u3044\u3066\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n\n\n\n PHP 8.0\u3067\u306f\u3001 PHP 8\u3067\u306f\u578b\u30c1\u30a7\u30c3\u30af\u304c\u53b3\u683c\u306b\u306a\u308a\u3001\u7121\u52b9\u306a\u65e5\u4ed8\u6587\u5b57\u5217\u306b\u5bfe\u3059\u308b\u30a8\u30e9\u30fc\u304c\u3088\u308a\u660e\u78ba\u306b\u306a\u308a\u307e\u3057\u305f\u3002<\/p>\n\n\n\n PHP 8.0\u3067\u5c0e\u5165\u3055\u308c\u305f\u540d\u524d\u4ed8\u304d\u5f15\u6570\u306f\u3001\u65e5\u4ed8\u95a2\u9023\u306e\u95a2\u6570\u30d1\u30e9\u30e1\u30fc\u30bf\u3092\u660e\u793a\u7684\u306b\u6307\u5b9a\u3067\u304d\u308b\u305f\u3081\u3001\u30b3\u30fc\u30c9\u306e\u53ef\u8aad\u6027\u304c\u5411\u4e0a\u3057\u307e\u3059\u3002<\/p>\n\n\n\n PHP 8\u3067\u306f\u3001 PHP 8.0\u3067\u5c0e\u5165\u3055\u308c\u305fJIT\u30b3\u30f3\u30d1\u30a4\u30e9\u306f\u3001\u7e70\u308a\u8fd4\u3057\u5b9f\u884c\u3055\u308c\u308b\u65e5\u4ed8\u8a08\u7b97\u306a\u3069\u306e\u30b3\u30fc\u30c9\u3092\u6700\u9069\u5316\u3057\u3001\u5b9f\u884c\u901f\u5ea6\u3092\u5411\u4e0a\u3055\u305b\u307e\u3059\u3002<\/p>\n\n\n\n PHP 8.0\u4ee5\u964d\u3067\u306f\u3001\u65e5\u4ed8\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u3084\u64cd\u4f5c\u3092\u7c21\u7565\u5316\u3059\u308b\u305f\u3081\u306e\u3044\u304f\u3064\u304b\u306e\u30b7\u30e7\u30fc\u30c8\u30ab\u30c3\u30c8\u30c6\u30af\u30cb\u30c3\u30af\u304c\u5229\u7528\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n PHP 8.0\u3067\u5c0e\u5165\u3055\u308c\u305f\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u30d7\u30ed\u30d1\u30c6\u30a3\u30d7\u30ed\u30e2\u30fc\u30b7\u30e7\u30f3\u3092\u4f7f\u7528\u3059\u308b\u3068\u3001\u65e5\u4ed8\u64cd\u4f5c\u3092\u884c\u3046\u30ab\u30b9\u30bf\u30e0\u30af\u30e9\u30b9\u3092\u3088\u308a\u7c21\u6f54\u306b\u8a18\u8ff0\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n PHP 8.0\u3067\u5c0e\u5165\u3055\u308c\u305f PHP 8.0\u3067\u5c0e\u5165\u3055\u308c\u305fNull\u5b89\u5168\u6f14\u7b97\u5b50\uff08 PHP 8.0\u3067\u5c0e\u5165\u3055\u308c\u305f\u5c5e\u6027\uff08Attributes\uff09\u3092\u4f7f\u7528\u3059\u308b\u3068\u3001\u65e5\u4ed8\u306e\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u30eb\u30fc\u30eb\u3092\u5ba3\u8a00\u7684\u306b\u5b9a\u7fa9\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n PHP 8.0\u4ee5\u964d\u306e\u65b0\u6a5f\u80fd\u306f\u3001\u65e5\u4ed8\u51e6\u7406\u306e\u30b3\u30fc\u30c9\u3092\u3088\u308a\u7c21\u6f54\u306b\u3001\u5b89\u5168\u306b\u3001\u9ad8\u901f\u306b\u66f8\u304f\u305f\u3081\u306e\u591a\u304f\u306e\u53ef\u80fd\u6027\u3092\u63d0\u4f9b\u3057\u307e\u3059\u3002\u3053\u308c\u3089\u306e\u65b0\u6a5f\u80fd\u3092\u6d3b\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u4fdd\u5b88\u6027\u304c\u9ad8\u304f\u3001\u8aad\u307f\u3084\u3059\u3044\u65e5\u4ed8\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u51e6\u7406\u3092\u5b9f\u88c5\u3067\u304d\u307e\u3059\u3002\u6b21\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001\u5b9f\u88c5\u4f8b\u3067\u5b66\u3076\u65e5\u4ed8\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u306e\u5b9f\u8df5\u7684\u30e6\u30fc\u30b9\u30b1\u30fc\u30b9\u306b\u3064\u3044\u3066\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n\n\n\n \u3053\u308c\u307e\u3067\u89e3\u8aac\u3057\u3066\u304d\u305f\u65e5\u4ed8\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u6280\u8853\u3092\u5b9f\u969b\u306e\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3067\u3069\u306e\u3088\u3046\u306b\u6d3b\u7528\u3059\u308b\u304b\u3001\u5177\u4f53\u7684\u306a\u5b9f\u88c5\u4f8b\u3092\u901a\u3057\u3066\u5b66\u3073\u307e\u3057\u3087\u3046\u3002\u3053\u3053\u3067\u306f\u3001\u4e88\u7d04\u30b7\u30b9\u30c6\u30e0\u3068\u5206\u6790\u7528\u30ed\u30b0\u30b7\u30b9\u30c6\u30e0\u3068\u3044\u30462\u3064\u306e\u7570\u306a\u308b\u30e6\u30fc\u30b9\u30b1\u30fc\u30b9\u3092\u53d6\u308a\u4e0a\u3052\u307e\u3059\u3002<\/p>\n\n\n\n \u4e88\u7d04\u30b7\u30b9\u30c6\u30e0\u3067\u306f\u3001\u30e6\u30fc\u30b6\u30fc\u306b\u3068\u3063\u3066\u5206\u304b\u308a\u3084\u3059\u3044\u65e5\u6642\u8868\u793a\u3068\u3001\u30b7\u30b9\u30c6\u30e0\u5185\u90e8\u3067\u306e\u78ba\u5b9f\u306a\u65e5\u6642\u7ba1\u7406\u306e\u4e21\u7acb\u304c\u91cd\u8981\u3067\u3059\u3002\u4ee5\u4e0b\u306f\u3001\u98f2\u98df\u5e97\u306e\u4e88\u7d04\u30b7\u30b9\u30c6\u30e0\u3092\u60f3\u5b9a\u3057\u305f\u5b9f\u88c5\u4f8b\u3067\u3059\u3002<\/p>\n\n\n\n \u3053\u306e\u4e88\u7d04\u30b7\u30b9\u30c6\u30e0\u306e\u5b9f\u88c5\u4f8b\u3067\u306f\u3001\u4ee5\u4e0b\u306e\u30dd\u30a4\u30f3\u30c8\u306b\u6ce8\u76ee\u3057\u3066\u304f\u3060\u3055\u3044\uff1a<\/p>\n\n\n\n \u30ed\u30b0\u51fa\u529b\u3084\u30c7\u30fc\u30bf\u5206\u6790\u3067\u306f\u3001\u65e5\u4ed8\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u306e\u4e00\u8cab\u6027\u3068\u7cbe\u5ea6\u304c\u91cd\u8981\u3067\u3059\u3002\u4ee5\u4e0b\u306f\u3001\u30a2\u30af\u30bb\u30b9\u30ed\u30b0\u89e3\u6790\u30b7\u30b9\u30c6\u30e0\u306e\u5b9f\u88c5\u4f8b\u3067\u3059\u3002<\/p>\n\n\n\n \u3053\u306e\u30ed\u30b0\u5206\u6790\u30b7\u30b9\u30c6\u30e0\u306e\u5b9f\u88c5\u4f8b\u3067\u306f\u3001\u4ee5\u4e0b\u306e\u30dd\u30a4\u30f3\u30c8\u306b\u6ce8\u76ee\u3057\u3066\u304f\u3060\u3055\u3044\uff1a<\/p>\n\n\n\n \u3053\u308c\u3089\u306e\u5b9f\u88c5\u4f8b\u306f\u3001\u5b9f\u969b\u306e\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3067\u65e5\u4ed8\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u3092\u6d3b\u7528\u3059\u308b\u969b\u306e\u53c2\u8003\u306b\u306a\u308a\u307e\u3059\u3002\u5fc5\u8981\u306b\u5fdc\u3058\u3066\u62e1\u5f35\u3084\u8abf\u6574\u3092\u884c\u3044\u3001\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306e\u8981\u4ef6\u306b\u5408\u308f\u305b\u3066\u30ab\u30b9\u30bf\u30de\u30a4\u30ba\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n\n\n\n PHP\u306e\u65e5\u4ed8\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u306b\u95a2\u3057\u3066\u3001\u958b\u767a\u8005\u304b\u3089\u3088\u304f\u5bc4\u305b\u3089\u308c\u308b\u8cea\u554f\u3068\u305d\u306e\u56de\u7b54\u3092\u307e\u3068\u3081\u307e\u3057\u305f\u3002<\/p>\n\n\n\n PHP\u3067\u300c\u5348\u524d\u300d\u300c\u5348\u5f8c\u300d\u3092\u8868\u793a\u3059\u308b\u65b9\u6cd5\u306f\u3044\u304f\u3064\u304b\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n Q: 00:00\uff08\u6df1\u591c0\u6642\uff09\u306f\u300c\u5348\u524d\u300d\uff1f\u300c\u5348\u5f8c\u300d\uff1f<\/strong><\/p>\n\n\n\n A: \u65e5\u672c\u306e\u4e00\u822c\u7684\u306a\u6163\u7fd2\u3067\u306f\u3001\u300c00:00\u300d\u306f\u300c\u5348\u524d0\u6642\u300d\u3068\u3057\u3066\u8868\u793a\u3057\u307e\u3059\u3002<\/p>\n\n\n\n Q: 12:00\uff08\u6b63\u5348\uff09\u306f\u300c\u5348\u524d\u300d\uff1f\u300c\u5348\u5f8c\u300d\uff1f<\/strong><\/p>\n\n\n\n A: \u65e5\u672c\u306e\u4e00\u822c\u7684\u306a\u6163\u7fd2\u3067\u306f\u3001\u300c12:00\u300d\u306f\u300c\u5348\u5f8c0\u6642\u300d\u3067\u306f\u306a\u304f\u300c\u5348\u5f8c12\u6642\u300d\u3068\u3057\u3066\u8868\u793a\u3057\u307e\u3059\u3002<\/p>\n\n\n\n \u65e5\u672c\u306e\u30b7\u30b9\u30c6\u30e0\u3067\u306f\u3001\u548c\u66a6\uff08\u4ee4\u548c\u3001\u5e73\u6210\u306a\u3069\uff09\u3068\u897f\u66a6\u306e\u76f8\u4e92\u5909\u63db\u304c\u5fc5\u8981\u306b\u306a\u308b\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n PHP 8.0\u4ee5\u964d\u3067\u306f\u3001IntlDateFormatter\u3092\u4f7f\u7528\u3057\u3066\u3088\u308a\u7c21\u5358\u306b\u548c\u66a6\u8868\u793a\u304c\u53ef\u80fd\u3067\u3059\u3002<\/p>\n\n\n\n Q: \u5143\u53f7\u304c\u5909\u308f\u308b\u77ac\u9593\uff08\u4f8b: \u5e73\u6210\u2192\u4ee4\u548c\uff09\u306e\u65e5\u4ed8\u306f\u3069\u3046\u6271\u3046\u3079\u304d\uff1f<\/strong><\/p>\n\n\n\n A: \u5143\u53f7\u306e\u5207\u308a\u66ff\u3048\u65e5\uff082019\u5e745\u67081\u65e5\u306a\u3069\uff09\u306f\u3001\u65b0\u3057\u3044\u5143\u53f7\uff08\u4ee4\u548c\uff09\u3068\u3057\u3066\u6271\u3044\u307e\u3059\u3002\u305f\u3060\u3057\u3001\u30b7\u30b9\u30c6\u30e0\u7684\u306b\u306f\u4e21\u65b9\u306e\u8868\u8a18\u304c\u53ef\u80fd\u306a\u3088\u3046\u306b\u8a2d\u8a08\u3059\u308b\u3068\u5b89\u5168\u3067\u3059\u3002<\/p>\n\n\n\n Q: \u660e\u6cbb\u4ee5\u524d\u306e\u65e5\u4ed8\u306f\u3069\u3046\u6271\u3046\u3079\u304d\uff1f<\/strong><\/p>\n\n\n\n A: \u660e\u6cbb\u4ee5\u524d\uff081868\u5e741\u670825\u65e5\u3088\u308a\u524d\uff09\u306e\u65e5\u4ed8\u306f\u3001\u4e00\u822c\u7684\u306b\u548c\u66a6\u5909\u63db\u304c\u3067\u304d\u306a\u3044\u305f\u3081\u3001\u897f\u66a6\u8868\u793a\u306e\u307e\u307e\u306b\u3059\u308b\u304b\u3001\u7279\u5225\u306a\u30ed\u30b8\u30c3\u30af\u3092\u8ffd\u52a0\u3057\u3066\u5bfe\u5fdc\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n \u3053\u308c\u3089\u306e\u5909\u63db\u95a2\u6570\u3092\u4f7f\u3046\u3053\u3068\u3067\u3001\u30b7\u30b9\u30c6\u30e0\u3067\u6271\u3044\u3084\u3059\u3044\u897f\u66a6\u3068\u3001\u65e5\u672c\u306e\u30e6\u30fc\u30b6\u30fc\u306b\u99b4\u67d3\u307f\u306e\u3042\u308b\u548c\u66a6\u3092\u9069\u5207\u306b\u5909\u63db\u30fb\u8868\u793a\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u5b9f\u969b\u306e\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3067\u306f\u3001\u8981\u4ef6\u306b\u5fdc\u3058\u3066\u3053\u308c\u3089\u306e\u95a2\u6570\u3092\u30ab\u30b9\u30bf\u30de\u30a4\u30ba\u3057\u3066\u4f7f\u7528\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n\n\n\n PHP\u3067\u306e\u65e5\u4ed8\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u306b\u3064\u3044\u3066\u3001\u57fa\u672c\u304b\u3089\u5b9f\u8df5\u7684\u306a\u30c6\u30af\u30cb\u30c3\u30af\u307e\u3067\u5e45\u5e83\u304f\u89e3\u8aac\u3057\u3066\u304d\u307e\u3057\u305f\u3002\u6700\u5f8c\u306b\u3001\u65e5\u4ed8\u51e6\u7406\u3092\u884c\u3046\u969b\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u3092\u307e\u3068\u3081\u3001\u3055\u3089\u306b\u52b9\u679c\u7684\u306aPHP\u65e5\u4ed8\u51e6\u7406\u306e\u8a2d\u8a08\u30dd\u30a4\u30f3\u30c8\u306b\u3064\u3044\u3066\u8aac\u660e\u3057\u307e\u3059\u3002<\/p>\n\n\n\n \u76ee\u7684\u306b\u5fdc\u3058\u305f\u6700\u9069\u306a\u65e5\u4ed8\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u8a2d\u5b9a\u3092\u4ee5\u4e0b\u306b\u307e\u3068\u3081\u307e\u3057\u305f\u3002\u3053\u308c\u3089\u3092\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306e\u8981\u4ef6\u306b\u5408\u308f\u305b\u3066\u6d3b\u7528\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n\n\ndate()<\/code>\u95a2\u6570\u306f\u3001PHP\u3067\u65e5\u4ed8\u3092\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u3059\u308b\u6700\u3082\u57fa\u672c\u7684\u306a\u65b9\u6cd5\u3067\u3001\u6b21\u306e\u3088\u3046\u306a\u69cb\u6587\u306b\u306a\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\nstring date(string $format, ?int $timestamp = null)\n<\/pre>\n\n\n\n
$format<\/code>\u306b\u306f\u3001\u8868\u793a\u3057\u305f\u3044\u65e5\u4ed8\u306e\u5f62\u5f0f\u3092\u6307\u5b9a\u3057\u3001\u7b2c\u4e8c\u5f15\u6570\u306e$timestamp<\/code>\u306b\u306f\u3001UNIX\u30bf\u30a4\u30e0\u30b9\u30bf\u30f3\u30d7\u3092\u6307\u5b9a\u3057\u307e\u3059\u3002$timestamp<\/code>\u3092\u7701\u7565\u3057\u305f\u5834\u5408\u306f\u3001\u73fe\u5728\u306e\u6642\u523b\u304c\u4f7f\u7528\u3055\u308c\u307e\u3059\u3002<\/p>\n\n\n\n\u4e3b\u8981\u306a\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u6587\u5b57\u4e00\u89a7<\/h4>\n\n\n\n
\u6587\u5b57<\/th> \u8aac\u660e<\/th> \u4f8b<\/th><\/tr><\/thead> Y<\/td> 4\u6841\u306e\u5e74\uff08\u897f\u66a6\uff09<\/td> 2023<\/td><\/tr> y<\/td> 2\u6841\u306e\u5e74<\/td> 23<\/td><\/tr> m<\/td> 0\u57cb\u3081\u306e\u6708\uff0801\u301c12\uff09<\/td> 01, 12<\/td><\/tr> n<\/td> 0\u57cb\u3081\u306a\u3057\u306e\u6708\uff081\u301c12\uff09<\/td> 1, 12<\/td><\/tr> d<\/td> 0\u57cb\u3081\u306e\u65e5\uff0801\u301c31\uff09<\/td> 01, 31<\/td><\/tr> j<\/td> 0\u57cb\u3081\u306a\u3057\u306e\u65e5\uff081\u301c31\uff09<\/td> 1, 31<\/td><\/tr> H<\/td> 24\u6642\u9593\u5f62\u5f0f\u306e\u6642\uff0800\u301c23\uff09<\/td> 00, 23<\/td><\/tr> h<\/td> 12\u6642\u9593\u5f62\u5f0f\u306e\u6642\uff0801\u301c12\uff09<\/td> 01, 12<\/td><\/tr> i<\/td> \u5206\uff0800\u301c59\uff09<\/td> 00, 59<\/td><\/tr> s<\/td> \u79d2\uff0800\u301c59\uff09<\/td> 00, 59<\/td><\/tr> a<\/td> \u5348\u524d\u307e\u305f\u306f\u5348\u5f8c\uff08\u5c0f\u6587\u5b57\uff09<\/td> am, pm<\/td><\/tr> A<\/td> \u5348\u524d\u307e\u305f\u306f\u5348\u5f8c\uff08\u5927\u6587\u5b57\uff09<\/td> AM, PM<\/td><\/tr> l<\/td> \u66dc\u65e5\uff08\u30d5\u30eb\u30b9\u30da\u30eb\uff09<\/td> Sunday, Monday<\/td><\/tr> D<\/td> \u66dc\u65e5\uff083\u6587\u5b57\uff09<\/td> Sun, Mon<\/td><\/tr> w<\/td> \u66dc\u65e5\uff08\u6570\u5024\uff09\uff080=\u65e5\u66dc, 6=\u571f\u66dc\uff09<\/td> 0, 6<\/td><\/tr> z<\/td> \u5e74\u9593\u306e\u901a\u7b97\u65e5\uff080\u301c365\uff09<\/td> 0, 365<\/td><\/tr> W<\/td> ISO-8601\u5f62\u5f0f\u306e\u9031\u756a\u53f7<\/td> 42<\/td><\/tr> t<\/td> \u6307\u5b9a\u6708\u306e\u65e5\u6570<\/td> 28, 31<\/td><\/tr> L<\/td> \u3046\u308b\u3046\u5e74\u304b\u3069\u3046\u304b\uff081=\u3046\u308b\u3046\u5e74\uff09<\/td> 0, 1<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div>\n\n\n \/\/ \u73fe\u5728\u306e\u65e5\u4ed8\u3092\u300c2023\u5e7412\u670831\u65e5\u300d\u306e\u5f62\u5f0f\u3067\u8868\u793a\necho date('Y\u5e74m\u6708d\u65e5'); \/\/ \u4f8b: 2023\u5e7412\u670831\u65e5\n\n\/\/ \u73fe\u5728\u306e\u65e5\u6642\u3092\u300c2023\/12\/31 23:59:59\u300d\u306e\u5f62\u5f0f\u3067\u8868\u793a\necho date('Y\/m\/d H:i:s'); \/\/ \u4f8b: 2023\/12\/31 23:59:59\n\n\/\/ \u7279\u5b9a\u306e\u65e5\u4ed8\u3092\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\uff08UNIX\u30bf\u30a4\u30e0\u30b9\u30bf\u30f3\u30d7\u3092\u4f7f\u7528\uff09\n$timestamp = mktime(0, 0, 0, 12, 31, 2023);\necho date('Y-m-d', $timestamp); \/\/ \u4f8b: 2023-12-31\n<\/pre>\n\n\n\nDateTime \u30af\u30e9\u30b9\u306b\u3088\u308b\u65e5\u4ed8\u64cd\u4f5c\u306e\u57fa\u790e\u77e5\u8b58<\/h3>\n\n\n\n
DateTime<\/code>\u30af\u30e9\u30b9\u304c\u6a19\u6e96\u3067\u5229\u7528\u3067\u304d\u307e\u3059\u3002date()<\/code>\u95a2\u6570\u3068\u6bd4\u8f03\u3057\u3066\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u5229\u70b9\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n\n
\u57fa\u672c\u7684\u306a\u4f7f\u3044\u65b9<\/h4>\n\n\n\n
\/\/ \u73fe\u5728\u306e\u65e5\u6642\u3067DateTime\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u751f\u6210\n$date = new DateTime();\n\n\/\/ \u7279\u5b9a\u306e\u65e5\u6642\u3067\u521d\u671f\u5316\n$date = new DateTime('2023-12-31 23:59:59');\n\n\/\/ \u7279\u5b9a\u306e\u30bf\u30a4\u30e0\u30be\u30fc\u30f3\u3092\u6307\u5b9a\n$date = new DateTime('now', new DateTimeZone('Asia\/Tokyo'));\n\n\/\/ \u65e5\u4ed8\u306e\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\necho $date->format('Y-m-d H:i:s'); \/\/ \u4f8b: 2023-12-31 23:59:59\n\n\/\/ \u65e5\u4ed8\u306e\u52a0\u7b97\n$date->modify('+1 day');\n\/\/ \u307e\u305f\u306f\n$date->add(new DateInterval('P1D')); \/\/ 1\u65e5\u8ffd\u52a0\n\n\/\/ \u65e5\u4ed8\u306e\u6e1b\u7b97\n$date->modify('-1 month');\n\/\/ \u307e\u305f\u306f\n$date->sub(new DateInterval('P1M')); \/\/ 1\u30f6\u6708\u6e1b\u7b97\n\n\/\/ \u65e5\u4ed8\u306e\u6bd4\u8f03\n$date1 = new DateTime('2023-01-01');\n$date2 = new DateTime('2023-12-31');\nif ($date1 < $date2) {\n echo 'date1\u306fdate2\u3088\u308a\u524d\u306e\u65e5\u4ed8\u3067\u3059';\n}\n\n\/\/ \u65e5\u4ed8\u306e\u5dee\u5206\u3092\u8a08\u7b97\n$diff = $date1->diff($date2);\necho $diff->format('%R%a\u65e5'); \/\/ \u4f8b: +364\u65e5\n<\/pre>\n\n\n\nDateTimeImmutable<\/code>\u30af\u30e9\u30b9\u3082\u7528\u610f\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u65e5\u4ed8\u64cd\u4f5c\u306e\u30e1\u30bd\u30c3\u30c9\u3092\u547c\u3073\u51fa\u3059\u3068\u3001\u5143\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306f\u5909\u66f4\u3055\u308c\u305a\u3001\u65b0\u3057\u3044\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u304c\u8fd4\u3055\u308c\u308b\u305f\u3081\u3001\u610f\u56f3\u3057\u306a\u3044\u5909\u66f4\u3092\u9632\u3050\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n$date = new DateTimeImmutable('2023-12-31');\n$newDate = $date->modify('+1 day'); \/\/ $date\u306f\u5909\u66f4\u3055\u308c\u305a\u3001\u65b0\u3057\u3044\u30aa\u30d6\u30b8\u30a7\u30af\u30c8$newDate\u304c\u751f\u6210\u3055\u308c\u308b\n\necho $date->format('Y-m-d'); \/\/ 2023-12-31\uff08\u5909\u66f4\u3055\u308c\u3066\u3044\u306a\u3044\uff09\necho $newDate->format('Y-m-d'); \/\/ 2024-01-01\uff08\u65b0\u3057\u3044\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\uff09\n<\/pre>\n\n\n\n\u5b9f\u52d9\u3067\u4f7f\u3048\u308b\u65e5\u4ed8\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u306e\u5b9f\u8df5\u30d1\u30bf\u30fc\u30f3<\/h2>\n\n\n\n
\u65e5\u672c\u8a9e\u306e\u5e74\u6708\u65e5\u8868\u793a\uff08\u4ee4\u548c\u30fb\u5e73\u6210\u5bfe\u5fdc\u3082\u542b\u3080\uff09\u306e\u5b9f\u88c5\u65b9\u6cd5<\/h3>\n\n\n\n
\u4e00\u822c\u7684\u306a\u65e5\u672c\u8a9e\u306e\u5e74\u6708\u65e5\u8868\u793a<\/h4>\n\n\n\n
\/\/ 2023\u5e7412\u670831\u65e5 \u5f62\u5f0f\necho date('Y\u5e74m\u6708d\u65e5');\n\n\/\/ \u533a\u5207\u308a\u6587\u5b57\u3092\u5909\u3048\u308b\u5834\u5408\necho date('Y\/m\/d'); \/\/ 2023\/12\/31\necho date('Y.m.d'); \/\/ 2023.12.31\necho date('Y-m-d'); \/\/ 2023-12-31\n\n\/\/ DateTime \u30af\u30e9\u30b9\u3092\u4f7f\u3046\u5834\u5408\n$date = new DateTime();\necho $date->format('Y\u5e74m\u6708d\u65e5'); \/\/ 2023\u5e7412\u670831\u65e5\n<\/pre>\n\n\n\n\u548c\u66a6\uff08\u4ee4\u548c\u30fb\u5e73\u6210\u306a\u3069\uff09\u306e\u8868\u793a<\/h4>\n\n\n\n
\/**\n * \u897f\u66a6\u3092\u548c\u66a6\u306b\u5909\u63db\u3059\u308b\u95a2\u6570\n * \n * @param string|int|DateTime $date \u65e5\u4ed8\uff08\u6587\u5b57\u5217\u3001\u30bf\u30a4\u30e0\u30b9\u30bf\u30f3\u30d7\u3001DateTime\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\uff09\n * @return string \u548c\u66a6\uff08\u4f8b: \u4ee4\u548c5\u5e7412\u670831\u65e5\uff09\n *\/\nfunction convertToJapaneseEra($date = 'now') {\n \/\/ DateTime\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306b\u7d71\u4e00\n if (is_string($date) && !is_numeric($date)) {\n $dateTime = new DateTime($date);\n } elseif (is_numeric($date)) {\n $dateTime = (new DateTime())->setTimestamp($date);\n } elseif ($date instanceof DateTime) {\n $dateTime = $date;\n } else {\n $dateTime = new DateTime();\n }\n \n $year = (int)$dateTime->format('Y');\n $month = (int)$dateTime->format('m');\n $day = (int)$dateTime->format('d');\n \n \/\/ \u5143\u53f7\u306e\u5b9a\u7fa9\uff08\u958b\u59cb\u65e5\u4ed8\u3068\u5143\u53f7\u540d\uff09\n $eras = [\n ['date' => '2019-05-01', 'name' => '\u4ee4\u548c', 'abbr' => 'R'],\n ['date' => '1989-01-08', 'name' => '\u5e73\u6210', 'abbr' => 'H'],\n ['date' => '1926-12-25', 'name' => '\u662d\u548c', 'abbr' => 'S'],\n ['date' => '1912-07-30', 'name' => '\u5927\u6b63', 'abbr' => 'T'],\n ['date' => '1868-01-25', 'name' => '\u660e\u6cbb', 'abbr' => 'M'],\n ];\n \n \/\/ \u65e5\u4ed8\u3092\u6bd4\u8f03\u3057\u3066\u9069\u5207\u306a\u5143\u53f7\u3092\u6c7a\u5b9a\n $targetDate = $dateTime->format('Y-m-d');\n $eraName = '';\n $eraYear = 0;\n \n foreach ($eras as $era) {\n if ($targetDate >= $era['date']) {\n $eraName = $era['name'];\n $eraStartDate = new DateTime($era['date']);\n $eraYear = $year - $eraStartDate->format('Y') + 1;\n break;\n }\n }\n \n \/\/ \u5143\u53f7\u304c\u898b\u3064\u304b\u3089\u306a\u3044\u5834\u5408\uff081868\u5e74\u4ee5\u524d\uff09\u306f\u897f\u66a6\u3092\u8fd4\u3059\n if (empty($eraName)) {\n return \"{$year}\u5e74{$month}\u6708{$day}\u65e5\";\n }\n \n \/\/ \u5143\u53f71\u5e74\u306f\u300c\u5143\u5e74\u300d\u3068\u8868\u8a18\u3059\u308b\u6163\u7fd2\u306b\u5bfe\u5fdc\n $eraYearStr = ($eraYear === 1) ? '\u5143' : $eraYear;\n \n return \"{$eraName}{$eraYearStr}\u5e74{$month}\u6708{$day}\u65e5\";\n}\n\n\/\/ \u4f7f\u7528\u4f8b\necho convertToJapaneseEra('2023-12-31'); \/\/ \u4ee4\u548c5\u5e7412\u670831\u65e5\necho convertToJapaneseEra('1989-01-08'); \/\/ \u5e73\u6210\u5143\u5e741\u67088\u65e5\necho convertToJapaneseEra('1989-01-07'); \/\/ \u662d\u548c64\u5e741\u67087\u65e5\n<\/pre>\n\n\n\n\u66dc\u65e5\u3092\u65e5\u672c\u8a9e\u3067\u8868\u793a\u3059\u308b\u30c6\u30af\u30cb\u30c3\u30af<\/h3>\n\n\n\n
\u914d\u5217\u3092\u4f7f\u7528\u3057\u305f\u5909\u63db\u65b9\u6cd5<\/h4>\n\n\n\n
\/**\n * \u66dc\u65e5\u3092\u65e5\u672c\u8a9e\u306b\u5909\u63db\u3059\u308b\u95a2\u6570\n * \n * @param string|int|DateTime $date \u65e5\u4ed8\n * @param bool $short \u7701\u7565\u5f62\u3067\u8fd4\u3059\u304b\uff08true: \u6708, false: \u6708\u66dc\u65e5\uff09\n * @return string \u65e5\u672c\u8a9e\u306e\u66dc\u65e5\n *\/\nfunction getJapaneseWeekday($date = 'now', $short = false) {\n \/\/ DateTime\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306b\u7d71\u4e00\n if (is_string($date) && !is_numeric($date)) {\n $dateTime = new DateTime($date);\n } elseif (is_numeric($date)) {\n $dateTime = (new DateTime())->setTimestamp($date);\n } elseif ($date instanceof DateTime) {\n $dateTime = $date;\n } else {\n $dateTime = new DateTime();\n }\n \n \/\/ \u66dc\u65e5\u306e\u914d\u5217\uff080:\u65e5\u66dc\u65e5 \uff5e 6:\u571f\u66dc\u65e5\uff09\n $weekdays = [\n '\u65e5\u66dc\u65e5', '\u6708\u66dc\u65e5', '\u706b\u66dc\u65e5', '\u6c34\u66dc\u65e5', '\u6728\u66dc\u65e5', '\u91d1\u66dc\u65e5', '\u571f\u66dc\u65e5'\n ];\n $shortWeekdays = ['\u65e5', '\u6708', '\u706b', '\u6c34', '\u6728', '\u91d1', '\u571f'];\n \n $w = (int)$dateTime->format('w');\n \n return $short ? $shortWeekdays[$w] : $weekdays[$w];\n}\n\n\/\/ \u4f7f\u7528\u4f8b\necho date('Y\u5e74m\u6708d\u65e5') . '\uff08' . getJapaneseWeekday('now', true) . '\uff09'; \/\/ 2023\u5e7412\u670831\u65e5\uff08\u65e5\uff09\necho date('Y\u5e74m\u6708d\u65e5') . getJapaneseWeekday(); \/\/ 2023\u5e7412\u670831\u65e5\u65e5\u66dc\u65e5\n<\/pre>\n\n\n\n\u65e5\u4ed8\u3068\u66dc\u65e5\u3092\u7d44\u307f\u5408\u308f\u305b\u305f\u5b8c\u5168\u306a\u8868\u793a<\/h4>\n\n\n\n
\/**\n * \u65e5\u4ed8\u3068\u66dc\u65e5\u3092\u65e5\u672c\u8a9e\u3067\u8868\u793a\u3059\u308b\u95a2\u6570\n * \n * @param string|int|DateTime $date \u65e5\u4ed8\n * @param string $format \u65e5\u4ed8\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\uff08Y\u5e74m\u6708d\u65e5 \u306a\u3069\uff09\n * @param bool $short \u66dc\u65e5\u3092\u7701\u7565\u5f62\u3067\u8fd4\u3059\u304b\n * @return string \u65e5\u672c\u8a9e\u306e\u65e5\u4ed8\u3068\u66dc\u65e5\n *\/\nfunction formatJapaneseDate($date = 'now', $format = 'Y\u5e74m\u6708d\u65e5', $short = true) {\n \/\/ DateTime\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306b\u7d71\u4e00\n if (is_string($date) && !is_numeric($date)) {\n $dateTime = new DateTime($date);\n } elseif (is_numeric($date)) {\n $dateTime = (new DateTime())->setTimestamp($date);\n } elseif ($date instanceof DateTime) {\n $dateTime = $date;\n } else {\n $dateTime = new DateTime();\n }\n \n $formattedDate = $dateTime->format($format);\n $weekday = getJapaneseWeekday($dateTime, $short);\n \n return $formattedDate . '\uff08' . $weekday . '\uff09';\n}\n\n\/\/ \u4f7f\u7528\u4f8b\necho formatJapaneseDate(); \/\/ 2023\u5e7412\u670831\u65e5\uff08\u65e5\uff09\necho formatJapaneseDate('2023-01-01', 'Y\/m\/d', false); \/\/ 2023\/01\/01\uff08\u65e5\u66dc\u65e5\uff09\n<\/pre>\n\n\n\n\u6642\u9593\u8868\u8a18\u306e\u30d0\u30ea\u30a8\u30fc\u30b7\u30e7\u30f3\u3068\u4f7f\u3044\u5206\u3051<\/h3>\n\n\n\n
24\u6642\u9593\u8868\u8a18\u306812\u6642\u9593\u8868\u8a18<\/h4>\n\n\n\n
\/\/ 24\u6642\u9593\u8868\u8a18\uff0814:30:00\uff09\necho date('H:i:s'); \n\n\/\/ 12\u6642\u9593\u8868\u8a18\uff08\u5348\u5f8c2\u664230\u520600\u79d2\uff09\nfunction formatJapaneseTime($time = 'now') {\n if (is_string($time) && !is_numeric($time)) {\n $dateTime = new DateTime($time);\n } elseif (is_numeric($time)) {\n $dateTime = (new DateTime())->setTimestamp($time);\n } elseif ($time instanceof DateTime) {\n $dateTime = $time;\n } else {\n $dateTime = new DateTime();\n }\n \n $hour = (int)$dateTime->format('G'); \/\/ 0-23 \u306e\u6642\u9593\n $ampm = $hour < 12 ? '\u5348\u524d' : '\u5348\u5f8c';\n $hour12 = $hour % 12;\n if ($hour12 === 0) $hour12 = 12;\n \n return $ampm . $hour12 . '\u6642' . $dateTime->format('i') . '\u5206' . $dateTime->format('s') . '\u79d2';\n}\n\necho formatJapaneseTime('14:30:00'); \/\/ \u5348\u5f8c2\u664230\u520600\u79d2\n<\/pre>\n\n\n\n\u6642\u9593\u8868\u8a18\u306e\u4f7f\u3044\u5206\u3051<\/h4>\n\n\n
\u8868\u8a18\u65b9\u6cd5<\/th> \u4f7f\u7528\u4f8b<\/th> \u9069\u3057\u305f\u7528\u9014<\/th><\/tr><\/thead> 24\u6642\u9593\u8868\u8a18\uff0814:30\uff09<\/td> \u30b7\u30b9\u30c6\u30e0\u30ed\u30b0\u3001\u5185\u90e8\u51e6\u7406<\/td> \u6280\u8853\u7684\u306a\u6587\u8108\u3084\u6b63\u78ba\u3055\u304c\u6c42\u3081\u3089\u308c\u308b\u5834\u5408<\/td><\/tr> 12\u6642\u9593\u8868\u8a18\uff08\u5348\u5f8c2:30\uff09<\/td> \u30e6\u30fc\u30b6\u30fc\u5411\u3051\u8868\u793a<\/td> \u4e00\u822c\u30e6\u30fc\u30b6\u30fc\u5411\u3051\u306e\u8868\u793a\u3067\u89aa\u3057\u307f\u3084\u3059\u3055\u304c\u6c42\u3081\u3089\u308c\u308b\u5834\u5408<\/td><\/tr> \u6f22\u5b57\u8868\u8a18\uff08\u5348\u5f8c2\u664230\u5206\uff09<\/td> \u516c\u5f0f\u6587\u66f8\u3001\u30d5\u30a9\u30fc\u30de\u30eb\u306a\u8868\u793a<\/td> \u6b63\u5f0f\u306a\u6587\u66f8\u3084\u4e01\u5be7\u306a\u8868\u73fe\u304c\u6c42\u3081\u3089\u308c\u308b\u5834\u5408<\/td><\/tr> \u7701\u7565\u5f62\uff0814\u664230\u5206\u9803\uff09<\/td> \u30ab\u30b8\u30e5\u30a2\u30eb\u306a\u8868\u793a<\/td> \u30d6\u30ed\u30b0\u3084SNS\u306a\u3069\u3001\u304f\u3060\u3051\u305f\u8868\u73fe\u304c\u9069\u3057\u3066\u3044\u308b\u5834\u5408<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div>\n\n\n \u5b9f\u8df5\u7684\u306a\u4f7f\u7528\u4f8b<\/h4>\n\n\n\n
\/\/ \u4e88\u7d04\u30b7\u30b9\u30c6\u30e0\u306e\u8868\u793a\u4f8b\n$reservationDate = new DateTime('2023-12-15 14:30:00');\necho '\u4e88\u7d04\u65e5\u6642: ' . formatJapaneseDate($reservationDate, 'Y\u5e74m\u6708d\u65e5') . ' ' . formatJapaneseTime($reservationDate);\n\/\/ \u51fa\u529b: \u4e88\u7d04\u65e5\u6642: 2023\u5e7412\u670815\u65e5\uff08\u91d1\uff09 \u5348\u5f8c2\u664230\u520600\u79d2\n\n\/\/ \u30ed\u30b0\u51fa\u529b\u306e\u4f8b\n$logDate = new DateTime();\necho '\u30ed\u30b0\u8a18\u9332\u6642\u9593: ' . $logDate->format('Y-m-d H:i:s.u');\n\/\/ \u51fa\u529b: \u30ed\u30b0\u8a18\u9332\u6642\u9593: 2023-12-31 23:59:59.123456\n<\/pre>\n\n\n\n\u65e5\u4ed8\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u306e\u30a8\u30e9\u30fc\u56de\u907f\u3068\u30c7\u30d0\u30c3\u30b0\u30c6\u30af\u30cb\u30c3\u30af<\/h2>\n\n\n\n
\u30bf\u30a4\u30e0\u30be\u30fc\u30f3\u8a2d\u5b9a\u30df\u30b9\u306b\u3088\u308b\u30c8\u30e9\u30d6\u30eb\u3068\u89e3\u6c7a\u7b56<\/h3>\n\n\n\n
\u30bf\u30a4\u30e0\u30be\u30fc\u30f3\u8a2d\u5b9a\u306e\u78ba\u8a8d\u65b9\u6cd5<\/h4>\n\n\n\n
\/\/ \u73fe\u5728\u306e\u30c7\u30d5\u30a9\u30eb\u30c8\u30bf\u30a4\u30e0\u30be\u30fc\u30f3\u3092\u78ba\u8a8d\necho \"\u73fe\u5728\u306e\u30bf\u30a4\u30e0\u30be\u30fc\u30f3: \" . date_default_timezone_get() . \"\\n\";\n\n\/\/ \u30bf\u30a4\u30e0\u30be\u30fc\u30f3\u304c\u8a2d\u5b9a\u3055\u308c\u3066\u3044\u306a\u3044\u5834\u5408\u306e\u6319\u52d5\u3092\u78ba\u8a8d\nif (ini_get('date.timezone') === '') {\n echo \"php.ini\u3067\u30bf\u30a4\u30e0\u30be\u30fc\u30f3\u304c\u8a2d\u5b9a\u3055\u308c\u3066\u3044\u307e\u305b\u3093\\n\";\n}\n<\/pre>\n\n\n\n\u30bf\u30a4\u30e0\u30be\u30fc\u30f3\u8a2d\u5b9a\u306e\u6b63\u3057\u3044\u65b9\u6cd5<\/h4>\n\n\n\n
\n
\/\/ \u30b9\u30af\u30ea\u30d7\u30c8\u306e\u5148\u982d\u3067\u30bf\u30a4\u30e0\u30be\u30fc\u30f3\u3092\u8a2d\u5b9a\ndate_default_timezone_set('Asia\/Tokyo');\n<\/pre>\n\n\n\n\n
date.timezone = Asia\/Tokyo\n<\/pre>\n\n\n\n
\n
\u30de\u30eb\u30c1\u30bf\u30a4\u30e0\u30be\u30fc\u30f3\u5bfe\u5fdc\u306e\u5b9f\u88c5\u4f8b<\/h4>\n\n\n\n
\/\/ \u6771\u4eac\u6642\u9593\u306e\u73fe\u5728\u65e5\u6642\u3092\u53d6\u5f97\n$tokyoTime = new DateTime('now', new DateTimeZone('Asia\/Tokyo'));\necho \"\u6771\u4eac: \" . $tokyoTime->format('Y-m-d H:i:s') . \"\\n\";\n\n\/\/ \u30cb\u30e5\u30fc\u30e8\u30fc\u30af\u6642\u9593\u306b\u5909\u63db\n$tokyoTime->setTimezone(new DateTimeZone('America\/New_York'));\necho \"\u30cb\u30e5\u30fc\u30e8\u30fc\u30af: \" . $tokyoTime->format('Y-m-d H:i:s') . \"\\n\";\n\n\/\/ \u7570\u306a\u308b\u30bf\u30a4\u30e0\u30be\u30fc\u30f3\u306e\u65e5\u6642\u3092\u6bd4\u8f03\u3059\u308b\u5834\u5408\n$tokyoTime = new DateTime('2023-12-31 23:00:00', new DateTimeZone('Asia\/Tokyo'));\n$nyTime = new DateTime('2023-12-31 09:00:00', new DateTimeZone('America\/New_York'));\n\n\/\/ \u5185\u90e8\u7684\u306bUTC\u306b\u5909\u63db\u3057\u3066\u6bd4\u8f03\u3059\u308b\u306e\u3067\u3001\u6b63\u3057\u304f\u6bd4\u8f03\u3067\u304d\u308b\nif ($tokyoTime == $nyTime) {\n echo \"\u540c\u3058\u6642\u523b\u3067\u3059\\n\"; \/\/ \u3053\u306e\u30e1\u30c3\u30bb\u30fc\u30b8\u304c\u8868\u793a\u3055\u308c\u308b\n} else {\n echo \"\u7570\u306a\u308b\u6642\u523b\u3067\u3059\\n\";\n}\n<\/pre>\n\n\n\n\u30bf\u30a4\u30e0\u30be\u30fc\u30f3\u306e\u30c7\u30d0\u30c3\u30b0\u30c6\u30af\u30cb\u30c3\u30af<\/h4>\n\n\n\n
\/\/ \u65e5\u4ed8\u3068\u30bf\u30a4\u30e0\u30be\u30fc\u30f3\u306e\u4e21\u65b9\u3092\u51fa\u529b\nfunction debugDateTime($dateTime) {\n if (!($dateTime instanceof DateTime)) {\n $dateTime = new DateTime($dateTime);\n }\n \n echo \"\u65e5\u6642: \" . $dateTime->format('Y-m-d H:i:s') . \"\\n\";\n echo \"\u30bf\u30a4\u30e0\u30be\u30fc\u30f3: \" . $dateTime->getTimezone()->getName() . \"\\n\";\n echo \"UTC\u30aa\u30d5\u30bb\u30c3\u30c8: \" . $dateTime->format('P') . \"\\n\";\n echo \"UNIX\u6642\u9593: \" . $dateTime->format('U') . \"\\n\";\n echo \"----------------\\n\";\n}\n\n\/\/ \u4f7f\u7528\u4f8b\ndebugDateTime('now');\ndebugDateTime(new DateTime('2023-12-31', new DateTimeZone('Europe\/London')));\n<\/pre>\n\n\n\n\u7121\u52b9\u306a\u65e5\u4ed8\u5165\u529b\u306b\u5bfe\u3059\u308b\u5805\u7262\u306a\u51e6\u7406\u65b9\u6cd5<\/h3>\n\n\n\n
\u65e5\u4ed8\u306e\u59a5\u5f53\u6027\u691c\u8a3c<\/h4>\n\n\n\n
\/**\n * \u65e5\u4ed8\u6587\u5b57\u5217\u304c\u6709\u52b9\u304b\u30c1\u30a7\u30c3\u30af\u3059\u308b\u95a2\u6570\n * \n * @param string $dateStr \u691c\u8a3c\u3059\u308b\u65e5\u4ed8\u6587\u5b57\u5217\n * @param string $format \u671f\u5f85\u3059\u308b\u65e5\u4ed8\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\n * @return bool \u6709\u52b9\u306a\u65e5\u4ed8\u306e\u5834\u5408\u306ftrue\n *\/\nfunction isValidDate($dateStr, $format = 'Y-m-d') {\n $dateTime = DateTime::createFromFormat($format, $dateStr);\n \n \/\/ \u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u306b\u4e00\u81f4\u3059\u308b\u304b\u3068\u3001\u5b9f\u969b\u306e\u65e5\u4ed8\u3068\u3057\u3066\u6709\u52b9\u304b\u306e\u4e21\u65b9\u3092\u30c1\u30a7\u30c3\u30af\n return $dateTime && $dateTime->format($format) === $dateStr;\n}\n\n\/\/ \u4f7f\u7528\u4f8b\n$testDates = [\n '2023-12-31', \/\/ \u6709\u52b9\n '2023-02-29', \/\/ \u7121\u52b9\uff082023\u5e74\u306f\u958f\u5e74\u3067\u306f\u306a\u3044\uff09\n '2023-13-01', \/\/ \u7121\u52b9\uff08\u6708\u304c\u7bc4\u56f2\u5916\uff09\n '2023\/12\/31', \/\/ \u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u4e0d\u4e00\u81f4\n];\n\nforeach ($testDates as $date) {\n echo $date . \" \u306f \" . (isValidDate($date) ? \"\u6709\u52b9\" : \"\u7121\u52b9\") . \"\u3067\u3059\\n\";\n}\n<\/pre>\n\n\n\n\u4f8b\u5916\u51e6\u7406\u3092\u6d3b\u7528\u3057\u305f\u65e5\u4ed8\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3<\/h4>\n\n\n\n
\/**\n * \u65e5\u4ed8\u6587\u5b57\u5217\u3092DateTime\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306b\u5909\u63db\u3059\u308b\uff08\u7121\u52b9\u306a\u5834\u5408\u306fnull\u3092\u8fd4\u3059\uff09\n * \n * @param string $dateStr \u65e5\u4ed8\u6587\u5b57\u5217\n * @param string $format \u671f\u5f85\u3059\u308b\u65e5\u4ed8\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\n * @return DateTime|null \u6709\u52b9\u306a\u65e5\u4ed8\u306e\u5834\u5408\u306fDateTime\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3001\u305d\u308c\u4ee5\u5916\u306fnull\n *\/\nfunction safeCreateDateTime($dateStr, $format = 'Y-m-d') {\n try {\n $dateTime = new DateTime($dateStr);\n return $dateTime;\n } catch (Exception $e) {\n \/\/ \u30a8\u30e9\u30fc\u30ed\u30b0\u306b\u8a18\u9332\u3057\u305f\u308a\u3059\u308b\u51e6\u7406\u3092\u3053\u3053\u306b\u8ffd\u52a0\n return null;\n }\n}\n\n\/\/ \u4f7f\u7528\u4f8b\n$dateStr = '2023-02-29'; \/\/ \u7121\u52b9\u306a\u65e5\u4ed8\n$dateTime = safeCreateDateTime($dateStr);\nif ($dateTime) {\n echo \"\u65e5\u4ed8\u306f\u6709\u52b9\u3067\u3059: \" . $dateTime->format('Y-m-d');\n} else {\n echo \"\u7121\u52b9\u306a\u65e5\u4ed8\u3067\u3059: \" . $dateStr;\n}\n<\/pre>\n\n\n\n\u30d5\u30a9\u30fc\u30eb\u30d0\u30c3\u30af\uff08\u4ee3\u66ff\u5024\uff09\u30d1\u30bf\u30fc\u30f3\u306e\u5b9f\u88c5<\/h4>\n\n\n\n
\/**\n * \u65e5\u4ed8\u6587\u5b57\u5217\u3092\u51e6\u7406\u3057\u3001\u7121\u52b9\u306a\u5834\u5408\u306f\u30c7\u30d5\u30a9\u30eb\u30c8\u5024\u3092\u4f7f\u7528\u3059\u308b\n * \n * @param string $dateStr \u65e5\u4ed8\u6587\u5b57\u5217\n * @param string $defaultDate \u30c7\u30d5\u30a9\u30eb\u30c8\u306e\u65e5\u4ed8\uff08\u7121\u52b9\u306a\u5834\u5408\uff09\n * @return DateTime \u6709\u52b9\u306aDateTime\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\n *\/\nfunction getDateWithFallback($dateStr, $defaultDate = 'now') {\n try {\n $dateTime = new DateTime($dateStr);\n \n \/\/ \u8ffd\u52a0\u306e\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\uff08\u4f8b\uff1a\u672a\u6765\u306e\u65e5\u4ed8\u306f\u7121\u52b9\u3068\u3059\u308b\uff09\n if ($dateTime > new DateTime()) {\n throw new Exception('\u672a\u6765\u306e\u65e5\u4ed8\u306f\u7121\u52b9\u3067\u3059');\n }\n \n return $dateTime;\n } catch (Exception $e) {\n return new DateTime($defaultDate);\n }\n}\n\n\/\/ \u4f7f\u7528\u4f8b\n$userInput = '2099-12-31'; \/\/ \u672a\u6765\u306e\u65e5\u4ed8\n$date = getDateWithFallback($userInput, 'today');\necho \"\u4f7f\u7528\u3059\u308b\u65e5\u4ed8: \" . $date->format('Y-m-d');\n<\/pre>\n\n\n\n\u65e5\u4ed8\u51e6\u7406\u306e\u30ed\u30b0\u3068\u30c7\u30d0\u30c3\u30b0<\/h4>\n\n\n\n
\/**\n * \u65e5\u4ed8\u51e6\u7406\u306e\u30c7\u30d0\u30c3\u30b0\u30ed\u30b0\u3092\u8a18\u9332\u3059\u308b\u95a2\u6570\n * \n * @param string $stage \u51e6\u7406\u30b9\u30c6\u30fc\u30b8\u306e\u540d\u524d\n * @param mixed $dateValue \u65e5\u4ed8\u5024\uff08\u6587\u5b57\u5217\u3001DateTime\u306a\u3069\uff09\n * @param string $additionalInfo \u8ffd\u52a0\u60c5\u5831\n *\/\nfunction logDateDebug($stage, $dateValue, $additionalInfo = '') {\n $logMessage = \"DATE_DEBUG - {$stage}: \";\n \n if ($dateValue instanceof DateTime) {\n $logMessage .= $dateValue->format('Y-m-d H:i:s e');\n } else {\n $logMessage .= var_export($dateValue, true);\n }\n \n if ($additionalInfo) {\n $logMessage .= \" - {$additionalInfo}\";\n }\n \n \/\/ \u958b\u767a\u74b0\u5883\u3067\u306fecho\u3067\u51fa\u529b\u3001\u672c\u756a\u74b0\u5883\u3067\u306f\u30ed\u30b0\u30d5\u30a1\u30a4\u30eb\u306b\u66f8\u304d\u8fbc\u3080\u306a\u3069\n echo $logMessage . \"\\n\";\n \/\/ error_log($logMessage); \/\/ \u672c\u756a\u74b0\u5883\u7528\n}\n\n\/\/ \u4f7f\u7528\u4f8b\n$inputDate = '2023-12-31';\nlogDateDebug('\u5165\u529b\u5024', $inputDate);\n\ntry {\n $dateTime = new DateTime($inputDate);\n logDateDebug('\u30d1\u30fc\u30b9\u5f8c', $dateTime);\n \n $dateTime->modify('+1 day');\n logDateDebug('1\u65e5\u5f8c', $dateTime);\n} catch (Exception $e) {\n logDateDebug('\u30a8\u30e9\u30fc', $inputDate, $e->getMessage());\n}\n<\/pre>\n\n\n\n\u56fd\u969b\u5316\u5bfe\u5fdc\u306e\u65e5\u4ed8\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u5b9f\u88c5\u6cd5<\/h2>\n\n\n\n
IntlDateFormatter \u3092\u6d3b\u7528\u3057\u305f\u591a\u8a00\u8a9e\u5bfe\u5fdc\u306e\u5b9f\u8df5<\/h3>\n\n\n\n
IntlDateFormatter\u306e\u57fa\u672c<\/h4>\n\n\n\n
\/**\n * IntlDateFormatter\u306e\u57fa\u672c\u7684\u306a\u4f7f\u3044\u65b9\n *\/\n\n\/\/ IntlDateFormatter\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u4f5c\u6210\n\/\/ \u30d1\u30e9\u30e1\u30fc\u30bf: \u30ed\u30b1\u30fc\u30eb, \u65e5\u4ed8\u30b9\u30bf\u30a4\u30eb, \u6642\u523b\u30b9\u30bf\u30a4\u30eb, \u30bf\u30a4\u30e0\u30be\u30fc\u30f3, \u30ab\u30ec\u30f3\u30c0\u30fc\u30bf\u30a4\u30d7, \u30d1\u30bf\u30fc\u30f3\n$formatter = new IntlDateFormatter(\n 'ja_JP', \/\/ \u30ed\u30b1\u30fc\u30eb\uff08\u65e5\u672c\u8a9e - \u65e5\u672c\uff09\n IntlDateFormatter::FULL, \/\/ \u65e5\u4ed8\u30b9\u30bf\u30a4\u30eb\uff08FULL, LONG, MEDIUM, SHORT, NONE\uff09\n IntlDateFormatter::SHORT, \/\/ \u6642\u523b\u30b9\u30bf\u30a4\u30eb\n 'Asia\/Tokyo', \/\/ \u30bf\u30a4\u30e0\u30be\u30fc\u30f3\n IntlDateFormatter::GREGORIAN, \/\/ \u30ab\u30ec\u30f3\u30c0\u30fc\u30bf\u30a4\u30d7\n null \/\/ \u30d1\u30bf\u30fc\u30f3\uff08null\u306e\u5834\u5408\u306f\u30b9\u30bf\u30a4\u30eb\u306b\u5f93\u3046\uff09\n);\n\n\/\/ \u65e5\u4ed8\u3092\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\uff08UNIX\u30bf\u30a4\u30e0\u30b9\u30bf\u30f3\u30d7\u307e\u305f\u306fDateTime\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u6e21\u3059\uff09\n$timestamp = strtotime('2023-12-31 14:30:00');\necho $formatter->format($timestamp) . \"\\n\";\n\/\/ \u51fa\u529b\u4f8b: 2023\u5e7412\u670831\u65e5 14:30\n\n\/\/ DateTime\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u4f7f\u7528\u3059\u308b\u5834\u5408\n$dateTime = new DateTime('2023-12-31 14:30:00', new DateTimeZone('Asia\/Tokyo'));\necho $formatter->format($dateTime) . \"\\n\";\n\/\/ \u51fa\u529b\u4f8b: 2023\u5e7412\u670831\u65e5 14:30\n<\/pre>\n\n\n\n\u65e5\u4ed8\/\u6642\u523b\u306e\u30b9\u30bf\u30a4\u30eb\u5b9a\u6570<\/h4>\n\n\n\n
\u5b9a\u6570<\/th> \u8aac\u660e<\/th> \u65e5\u672c\u8a9e\u3067\u306e\u4f8b<\/th> \u82f1\u8a9e\u3067\u306e\u4f8b<\/th><\/tr><\/thead> IntlDateFormatter::FULL<\/td> \u6700\u3082\u8a73\u7d30\u306a\u30b9\u30bf\u30a4\u30eb<\/td> 2023\u5e7412\u670831\u65e5\u65e5\u66dc\u65e5<\/td> Sunday, December 31, 2023<\/td><\/tr> IntlDateFormatter::LONG<\/td> \u9577\u3044\u30b9\u30bf\u30a4\u30eb<\/td> 2023\u5e7412\u670831\u65e5<\/td> December 31, 2023<\/td><\/tr> IntlDateFormatter::MEDIUM<\/td> \u4e2d\u7a0b\u5ea6\u306e\u30b9\u30bf\u30a4\u30eb<\/td> 2023\/12\/31<\/td> Dec 31, 2023<\/td><\/tr> IntlDateFormatter::SHORT<\/td> \u77ed\u3044\u30b9\u30bf\u30a4\u30eb<\/td> 23\/12\/31<\/td> 12\/31\/23<\/td><\/tr> IntlDateFormatter::NONE<\/td> \u975e\u8868\u793a<\/td> \uff08\u8868\u793a\u306a\u3057\uff09<\/td> (not displayed)<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div>\n\n\n \u8907\u6570\u306e\u8a00\u8a9e\u306b\u5bfe\u5fdc\u3057\u305f\u30b3\u30fc\u30c9\u4f8b<\/h4>\n\n\n\n
\/**\n * \u8907\u6570\u306e\u8a00\u8a9e\u306b\u5bfe\u5fdc\u3057\u305f\u65e5\u4ed8\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\n * \n * @param mixed $date \u65e5\u4ed8\uff08\u6587\u5b57\u5217\u3001\u30bf\u30a4\u30e0\u30b9\u30bf\u30f3\u30d7\u3001DateTime\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\uff09\n * @param string $locale \u30ed\u30b1\u30fc\u30eb\u6587\u5b57\u5217\n * @return string \u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u3055\u308c\u305f\u65e5\u4ed8\n *\/\nfunction formatDateForLocale($date, $locale) {\n \/\/ \u65e5\u4ed8\u3092DateTime\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306b\u5909\u63db\n if (!($date instanceof DateTime)) {\n if (is_string($date) && !is_numeric($date)) {\n $dateTime = new DateTime($date);\n } elseif (is_numeric($date)) {\n $dateTime = (new DateTime())->setTimestamp($date);\n } else {\n $dateTime = new DateTime();\n }\n } else {\n $dateTime = $date;\n }\n \n \/\/ \u30ed\u30b1\u30fc\u30eb\u306b\u5fdc\u3058\u305f\u30d5\u30a9\u30fc\u30de\u30c3\u30bf\u30fc\u3092\u4f5c\u6210\n $formatter = new IntlDateFormatter(\n $locale,\n IntlDateFormatter::LONG,\n IntlDateFormatter::SHORT\n );\n \n return $formatter->format($dateTime);\n}\n\n\/\/ \u69d8\u3005\u306a\u8a00\u8a9e\u3067\u306e\u65e5\u4ed8\u8868\u793a\u4f8b\n$date = new DateTime('2023-12-31 14:30:00');\n$locales = [\n 'ja_JP' => '\u65e5\u672c\u8a9e\uff08\u65e5\u672c\uff09',\n 'en_US' => '\u82f1\u8a9e\uff08\u30a2\u30e1\u30ea\u30ab\uff09',\n 'fr_FR' => '\u30d5\u30e9\u30f3\u30b9\u8a9e\uff08\u30d5\u30e9\u30f3\u30b9\uff09',\n 'de_DE' => '\u30c9\u30a4\u30c4\u8a9e\uff08\u30c9\u30a4\u30c4\uff09',\n 'zh_CN' => '\u4e2d\u56fd\u8a9e\uff08\u7c21\u4f53\u5b57\uff09',\n 'ko_KR' => '\u97d3\u56fd\u8a9e\uff08\u97d3\u56fd\uff09',\n 'es_ES' => '\u30b9\u30da\u30a4\u30f3\u8a9e\uff08\u30b9\u30da\u30a4\u30f3\uff09',\n 'it_IT' => '\u30a4\u30bf\u30ea\u30a2\u8a9e\uff08\u30a4\u30bf\u30ea\u30a2\uff09',\n 'ru_RU' => '\u30ed\u30b7\u30a2\u8a9e\uff08\u30ed\u30b7\u30a2\uff09'\n];\n\nforeach ($locales as $locale => $name) {\n echo \"{$name}: \" . formatDateForLocale($date, $locale) . \"\\n\";\n}\n\n\/* \u51fa\u529b\u4f8b:\n\u65e5\u672c\u8a9e\uff08\u65e5\u672c\uff09: 2023\u5e7412\u670831\u65e5 14:30\n\u82f1\u8a9e\uff08\u30a2\u30e1\u30ea\u30ab\uff09: December 31, 2023 at 2:30 PM\n\u30d5\u30e9\u30f3\u30b9\u8a9e\uff08\u30d5\u30e9\u30f3\u30b9\uff09: 31 d\u00e9cembre 2023 \u00e0 14:30\n\u30c9\u30a4\u30c4\u8a9e\uff08\u30c9\u30a4\u30c4\uff09: 31. Dezember 2023 um 14:30\n\u4e2d\u56fd\u8a9e\uff08\u7c21\u4f53\u5b57\uff09: 2023\u5e7412\u670831\u65e5 \u4e0b\u53482:30\n\u97d3\u56fd\u8a9e\uff08\u97d3\u56fd\uff09: 2023\ub144 12\uc6d4 31\uc77c \uc624\ud6c4 2:30\n\u30b9\u30da\u30a4\u30f3\u8a9e\uff08\u30b9\u30da\u30a4\u30f3\uff09: 31 de diciembre de 2023, 14:30\n\u30a4\u30bf\u30ea\u30a2\u8a9e\uff08\u30a4\u30bf\u30ea\u30a2\uff09: 31 dicembre 2023 14:30\n\u30ed\u30b7\u30a2\u8a9e\uff08\u30ed\u30b7\u30a2\uff09: 31 \u0434\u0435\u043a\u0430\u0431\u0440\u044f 2023 \u0433. 14:30\n*\/\n<\/pre>\n\n\n\n\u30ed\u30b1\u30fc\u30eb\u306b\u5fdc\u3058\u305f\u65e5\u4ed8\u8868\u793a\u306e\u5207\u308a\u66ff\u3048\u65b9\u6cd5<\/h3>\n\n\n\n
\u30e6\u30fc\u30b6\u30fc\u8a00\u8a9e\u8a2d\u5b9a\u306b\u57fa\u3065\u304f\u65e5\u4ed8\u8868\u793a<\/h4>\n\n\n\n
\/**\n * \u30e6\u30fc\u30b6\u30fc\u8a00\u8a9e\u8a2d\u5b9a\u306b\u57fa\u3065\u3044\u3066\u65e5\u4ed8\u3092\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u3059\u308b\n * \n * @param mixed $date \u65e5\u4ed8\n * @param string $userLocale \u30e6\u30fc\u30b6\u30fc\u306e\u30ed\u30b1\u30fc\u30eb\u8a2d\u5b9a\n * @param array $formats \u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u8a2d\u5b9a\u914d\u5217\uff08\u30aa\u30d7\u30b7\u30e7\u30f3\uff09\n * @return string \u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u3055\u308c\u305f\u65e5\u4ed8\n *\/\nfunction formatDateByUserLocale($date, $userLocale, array $formats = []) {\n \/\/ \u30c7\u30d5\u30a9\u30eb\u30c8\u306e\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u8a2d\u5b9a\n $defaultFormats = [\n 'date_style' => IntlDateFormatter::LONG,\n 'time_style' => IntlDateFormatter::SHORT,\n 'timezone' => null, \/\/ \u30e6\u30fc\u30b6\u30fc\u306e\u30bf\u30a4\u30e0\u30be\u30fc\u30f3\u3092\u4f7f\u7528\n 'pattern' => null\n ];\n \n \/\/ \u30e6\u30fc\u30b6\u30fc\u8a2d\u5b9a\u3068\u30c7\u30d5\u30a9\u30eb\u30c8\u8a2d\u5b9a\u3092\u30de\u30fc\u30b8\n $formats = array_merge($defaultFormats, $formats);\n \n \/\/ \u30ed\u30b1\u30fc\u30eb\u306b\u57fa\u3065\u304f\u30d5\u30a9\u30fc\u30de\u30c3\u30bf\u30fc\u3092\u4f5c\u6210\n $formatter = new IntlDateFormatter(\n $userLocale,\n $formats['date_style'],\n $formats['time_style'],\n $formats['timezone'],\n IntlDateFormatter::GREGORIAN,\n $formats['pattern']\n );\n \n \/\/ DateTime\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306b\u5909\u63db\n if (!($date instanceof DateTime)) {\n if (is_string($date) && !is_numeric($date)) {\n $dateTime = new DateTime($date);\n } elseif (is_numeric($date)) {\n $dateTime = (new DateTime())->setTimestamp($date);\n } else {\n $dateTime = new DateTime();\n }\n } else {\n $dateTime = $date;\n }\n \n return $formatter->format($dateTime);\n}\n\n\/\/ \u4f7f\u7528\u4f8b\uff08Web\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3067\u306e\u5b9f\u88c5\u30a4\u30e1\u30fc\u30b8\uff09\n\n\/\/ \u30e6\u30fc\u30b6\u30fc\u306e\u30ed\u30b1\u30fc\u30eb\u8a2d\u5b9a\uff08\u5b9f\u969b\u306e\u30a2\u30d7\u30ea\u3067\u306f\u30bb\u30c3\u30b7\u30e7\u30f3\u3084DB\u304b\u3089\u53d6\u5f97\uff09\n$userLocale = 'fr_FR'; \/\/ \u30d5\u30e9\u30f3\u30b9\u8a9e\u570f\u306e\u30e6\u30fc\u30b6\u30fc\u3068\u4eee\u5b9a\n\n\/\/ \u8a18\u4e8b\u306e\u6295\u7a3f\u65e5\u6642\n$postDate = new DateTime('2023-12-25 09:15:00');\n\n\/\/ \u30e6\u30fc\u30b6\u30fc\u306e\u30ed\u30b1\u30fc\u30eb\u306b\u5fdc\u3058\u305f\u65e5\u4ed8\u8868\u793a\necho \"\u8a18\u4e8b\u6295\u7a3f\u65e5: \" . formatDateByUserLocale($postDate, $userLocale);\n\/\/ \u51fa\u529b\u4f8b: \u8a18\u4e8b\u6295\u7a3f\u65e5: 25 d\u00e9cembre 2023 \u00e0 09:15\n\n\/\/ \u30ab\u30b9\u30bf\u30e0\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u3092\u6307\u5b9a\u3059\u308b\u5834\u5408\necho \"\u30ab\u30b9\u30bf\u30e0\u5f62\u5f0f: \" . formatDateByUserLocale($postDate, $userLocale, [\n 'date_style' => IntlDateFormatter::FULL,\n 'time_style' => IntlDateFormatter::LONG\n]);\n\/\/ \u51fa\u529b\u4f8b: \u30ab\u30b9\u30bf\u30e0\u5f62\u5f0f: lundi 25 d\u00e9cembre 2023 \u00e0 09:15:00\n<\/pre>\n\n\n\n\u30ab\u30b9\u30bf\u30e0\u30d1\u30bf\u30fc\u30f3\u3092\u4f7f\u7528\u3057\u305f\u67d4\u8edf\u306a\u30d5\u30a9\u30fc\u30de\u30c3\u30c8<\/h4>\n\n\n\n
\/**\n * \u30ab\u30b9\u30bf\u30e0\u30d1\u30bf\u30fc\u30f3\u3092\u4f7f\u7528\u3057\u305f\u65e5\u4ed8\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\n * \n * @param mixed $date \u65e5\u4ed8\n * @param string $locale \u30ed\u30b1\u30fc\u30eb\n * @param string $pattern \u30ab\u30b9\u30bf\u30e0\u30d1\u30bf\u30fc\u30f3\n * @return string \u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u3055\u308c\u305f\u65e5\u4ed8\n *\/\nfunction formatDateWithPattern($date, $locale, $pattern) {\n $formatter = new IntlDateFormatter(\n $locale,\n IntlDateFormatter::FULL,\n IntlDateFormatter::FULL,\n null,\n IntlDateFormatter::GREGORIAN,\n $pattern\n );\n \n return $formatter->format($date instanceof DateTime ? $date : new DateTime($date));\n}\n\n\/\/ \u4f7f\u7528\u4f8b\n$date = new DateTime('2023-12-31');\n\n\/\/ \u30ab\u30b9\u30bf\u30e0\u30d1\u30bf\u30fc\u30f3\u306e\u4f8b\n$patterns = [\n 'EEEE, d MMMM y' => '\u66dc\u65e5\u3001\u65e5 \u6708 \u5e74\uff08\u30d5\u30eb\uff09',\n 'y\u5e74MM\u6708dd\u65e5' => '\u5e74\u6708\u65e5\uff08\u65e5\u672c\u5f0f\uff09',\n 'QQQ y' => '\u56db\u534a\u671f \u5e74',\n 'MMMM d' => '\u6708 \u65e5\uff08\u6708\u306e\u540d\u524d\uff09',\n \"y\u5e74'\u7b2c'w'\u9031'\" => '\u5e74\u3068\u9031\u756a\u53f7'\n];\n\nforeach ($patterns as $pattern => $description) {\n echo \"{$description}: \" . formatDateWithPattern($date, 'ja_JP', $pattern) . \"\\n\";\n}\n\n\/* \u51fa\u529b\u4f8b:\n\u66dc\u65e5\u3001\u65e5 \u6708 \u5e74\uff08\u30d5\u30eb\uff09: \u65e5\u66dc\u65e5, 31 12\u6708 2023\n\u5e74\u6708\u65e5\uff08\u65e5\u672c\u5f0f\uff09: 2023\u5e7412\u670831\u65e5\n\u56db\u534a\u671f \u5e74: Q4 2023\n\u6708 \u65e5\uff08\u6708\u306e\u540d\u524d\uff09: 12\u6708 31\n\u5e74\u3068\u9031\u756a\u53f7: 2023\u5e74\u7b2c53\u9031\n*\/\n<\/pre>\n\n\n\n\u8907\u6570\u8a00\u8a9e\u306e\u30ab\u30ec\u30f3\u30c0\u30fc\u30b7\u30b9\u30c6\u30e0\u5bfe\u5fdc<\/h4>\n\n\n\n
\/**\n * \u7570\u306a\u308b\u30ab\u30ec\u30f3\u30c0\u30fc\u30b7\u30b9\u30c6\u30e0\u3067\u65e5\u4ed8\u3092\u8868\u793a\n * \n * @param mixed $date \u30b0\u30ec\u30b4\u30ea\u30aa\u66a6\u306e\u65e5\u4ed8\n * @param string $locale \u30ed\u30b1\u30fc\u30eb\n * @param int $calendar \u30ab\u30ec\u30f3\u30c0\u30fc\u30bf\u30a4\u30d7\n * @return string \u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u3055\u308c\u305f\u65e5\u4ed8\n *\/\nfunction formatDateWithCalendar($date, $locale, $calendar) {\n $formatter = new IntlDateFormatter(\n $locale,\n IntlDateFormatter::LONG,\n IntlDateFormatter::NONE,\n null,\n $calendar\n );\n \n return $formatter->format($date instanceof DateTime ? $date : new DateTime($date));\n}\n\n\/\/ \u4f7f\u7528\u4f8b\n$date = new DateTime('2023-12-31');\n\n\/\/ \u7570\u306a\u308b\u30ab\u30ec\u30f3\u30c0\u30fc\u30b7\u30b9\u30c6\u30e0\n$calendars = [\n IntlDateFormatter::GREGORIAN => '\u30b0\u30ec\u30b4\u30ea\u30aa\u66a6',\n IntlDateFormatter::TRADITIONAL => '\u4f1d\u7d71\u7684\u306a\u66a6\uff08\u30ed\u30b1\u30fc\u30eb\u306b\u57fa\u3065\u304f\uff09',\n \/\/ \u4ee5\u4e0b\u306f\u74b0\u5883\u306b\u3088\u3063\u3066\u306f\u5229\u7528\u3067\u304d\u306a\u3044\u5834\u5408\u304c\u3042\u308a\u307e\u3059\n \/\/IntlDateFormatter::JAPANESE => '\u548c\u66a6',\n \/\/IntlDateFormatter::BUDDHIST => '\u4ecf\u66a6',\n \/\/IntlDateFormatter::ISLAMIC => '\u30a4\u30b9\u30e9\u30e0\u66a6',\n \/\/IntlDateFormatter::PERSIAN => '\u30da\u30eb\u30b7\u30a2\u66a6',\n \/\/IntlDateFormatter::CHINESE => '\u4e2d\u56fd\u66a6',\n \/\/IntlDateFormatter::INDIAN => '\u30a4\u30f3\u30c9\u56fd\u5b9a\u66a6'\n];\n\nforeach ($calendars as $calendar => $name) {\n try {\n echo \"{$name}: \" . formatDateWithCalendar($date, 'ja_JP', $calendar) . \"\\n\";\n } catch (Exception $e) {\n echo \"{$name}: \u30b5\u30dd\u30fc\u30c8\u3055\u308c\u3066\u3044\u307e\u305b\u3093\\n\";\n }\n}\n<\/pre>\n\n\n\n\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u8003\u616e\u3057\u305f\u65e5\u4ed8\u51e6\u7406\u306e\u6700\u9069\u5316<\/h2>\n\n\n\n
\u65e5\u4ed8\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u51e6\u7406\u306e\u9ad8\u901f\u5316\u30c6\u30af\u30cb\u30c3\u30af<\/h3>\n\n\n\n
1. \u95a2\u6570\u9078\u629e\u306e\u6700\u9069\u5316<\/h4>\n\n\n\n
\/\/ \u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6bd4\u8f03\u306e\u30b3\u30fc\u30c9\u4f8b\n$timestamp = time();\n$iterations = 10000;\n\n\/\/ 1. time() - \u6700\u3082\u9ad8\u901f\uff08\u305f\u3060\u3057\u73fe\u5728\u6642\u523b\u306eUNIX\u30bf\u30a4\u30e0\u30b9\u30bf\u30f3\u30d7\u306e\u307f\uff09\n$start = microtime(true);\nfor ($i = 0; $i < $iterations; $i++) {\n $time = time();\n}\n$timeFunc = microtime(true) - $start;\n\n\/\/ 2. date() - \u6bd4\u8f03\u7684\u9ad8\u901f\n$start = microtime(true);\nfor ($i = 0; $i < $iterations; $i++) {\n $formatted = date('Y-m-d H:i:s', $timestamp);\n}\n$dateFunc = microtime(true) - $start;\n\n\/\/ 3. DateTime - \u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u6307\u5411\u3060\u304c\u3084\u3084\u30aa\u30fc\u30d0\u30fc\u30d8\u30c3\u30c9\u3042\u308a\n$start = microtime(true);\nfor ($i = 0; $i < $iterations; $i++) {\n $dateTime = new DateTime();\n $formatted = $dateTime->format('Y-m-d H:i:s');\n}\n$dateTimeFunc = microtime(true) - $start;\n\n\/\/ 4. IntlDateFormatter - \u6700\u3082\u4f4e\u901f\u3060\u304c\u56fd\u969b\u5316\u5bfe\u5fdc\n$start = microtime(true);\nfor ($i = 0; $i < $iterations; $i++) {\n $formatter = new IntlDateFormatter(\n 'ja_JP',\n IntlDateFormatter::LONG,\n IntlDateFormatter::SHORT\n );\n $formatted = $formatter->format($timestamp);\n}\n$intlFunc = microtime(true) - $start;\n\n\/\/ \u7d50\u679c\u8868\u793a\necho \"time(): {$timeFunc}\u79d2\\n\";\necho \"date(): {$dateFunc}\u79d2\\n\";\necho \"DateTime: {$dateTimeFunc}\u79d2\\n\";\necho \"IntlDateFormatter: {$intlFunc}\u79d2\\n\";\n<\/pre>\n\n\n\n2. \u30ad\u30e3\u30c3\u30b7\u30f3\u30b0\u3092\u6d3b\u7528\u3057\u305f\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u5411\u4e0a<\/h4>\n\n\n\n
\/**\n * \u30ad\u30e3\u30c3\u30b7\u30f3\u30b0\u6a5f\u80fd\u4ed8\u304d\u65e5\u4ed8\u30d5\u30a9\u30fc\u30de\u30c3\u30bf\u30fc\n *\/\nclass CachedDateFormatter {\n private static $cache = [];\n \n \/**\n * \u65e5\u4ed8\u3092\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u3057\u3001\u7d50\u679c\u3092\u30ad\u30e3\u30c3\u30b7\u30e5\u3059\u308b\n * \n * @param int $timestamp \u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u3059\u308b\u30bf\u30a4\u30e0\u30b9\u30bf\u30f3\u30d7\n * @param string $format \u65e5\u4ed8\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\n * @return string \u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u3055\u308c\u305f\u65e5\u4ed8\n *\/\n public static function format($timestamp, $format = 'Y-m-d H:i:s') {\n \/\/ \u79d2\u5358\u4f4d\u3067\u4e38\u3081\u3066\u30ad\u30e3\u30c3\u30b7\u30e5\u306e\u30d2\u30c3\u30c8\u7387\u3092\u4e0a\u3052\u308b\n $timestamp = (int)$timestamp;\n $cacheKey = $timestamp . '_' . $format;\n \n if (!isset(self::$cache[$cacheKey])) {\n self::$cache[$cacheKey] = date($format, $timestamp);\n \n \/\/ \u30ad\u30e3\u30c3\u30b7\u30e5\u30b5\u30a4\u30ba\u306e\u5236\u9650\uff08\u4efb\u610f\uff09\n if (count(self::$cache) > 1000) {\n \/\/ \u6700\u3082\u53e4\u3044\u30a8\u30f3\u30c8\u30ea\u3092\u524a\u9664\n array_shift(self::$cache);\n }\n }\n \n return self::$cache[$cacheKey];\n }\n \n \/**\n * \u30ad\u30e3\u30c3\u30b7\u30e5\u3092\u30af\u30ea\u30a2\u3059\u308b\n *\/\n public static function clearCache() {\n self::$cache = [];\n }\n}\n\n\/\/ \u4f7f\u7528\u4f8b\necho CachedDateFormatter::format(time(), 'Y-m-d');\n<\/pre>\n\n\n\n3. \u65e5\u4ed8\u8a08\u7b97\u306e\u52b9\u7387\u5316<\/h4>\n\n\n\n
\/\/ \u975e\u52b9\u7387\u306a\u4f8b\uff08DateTime\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u6bce\u56de\u751f\u6210\uff09\nfunction addDaysInefficient($date, $days) {\n for ($i = 0; $i < $days; $i++) {\n $date = new DateTime($date->format('Y-m-d'));\n $date->modify('+1 day');\n }\n return $date;\n}\n\n\/\/ \u52b9\u7387\u7684\u306a\u4f8b\uff08\u65e2\u5b58\u306eDateTime\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u518d\u5229\u7528\uff09\nfunction addDaysEfficient($date, $days) {\n $date = clone $date; \/\/ \u5143\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u5909\u66f4\u3057\u306a\u3044\u3088\u3046\u306b\u30af\u30ed\u30fc\u30f3\n $date->modify(\"+{$days} days\"); \/\/ \u4e00\u5ea6\u306e\u64cd\u4f5c\u3067\u52a0\u7b97\n return $date;\n}\n<\/pre>\n\n\n\n4. \u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u51e6\u7406\u3068\u8a08\u7b97\u51e6\u7406\u306e\u5206\u96e2<\/h4>\n\n\n\n
\/\/ \u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u304b\u3089\u306e\u5927\u91cf\u30c7\u30fc\u30bf\u51e6\u7406\u306e\u4f8b\nfunction processDateEfficiently($rows) {\n \/\/ \u8a08\u7b97\u51e6\u7406\u7528\u306e\u5185\u90e8\u8868\u73fe\uff08\u30bf\u30a4\u30e0\u30b9\u30bf\u30f3\u30d7\uff09\u3092\u4f7f\u7528\n $timestamps = [];\n foreach ($rows as $row) {\n $timestamps[] = strtotime($row['date']);\n }\n \n \/\/ \u5fc5\u8981\u306a\u8a08\u7b97\u3092\u52b9\u7387\u7684\u306b\u5b9f\u884c\n $filteredTimestamps = array_filter($timestamps, function($ts) {\n return $ts > strtotime('-30 days');\n });\n \n \/\/ \u8868\u793a\u306e\u305f\u3081\u306e\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u306f\u6700\u5f8c\u306b\u4e00\u5ea6\u3060\u3051\u5b9f\u884c\n $formattedDates = [];\n foreach ($filteredTimestamps as $ts) {\n $formattedDates[] = date('Y-m-d', $ts);\n }\n \n return $formattedDates;\n}\n<\/pre>\n\n\n\n\u5927\u91cf\u30c7\u30fc\u30bf\u51e6\u7406\u6642\u306e\u65e5\u4ed8\u64cd\u4f5c\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/h3>\n\n\n\n
1. \u30d0\u30c3\u30c1\u51e6\u7406\u3068\u5236\u9650<\/h4>\n\n\n\n
\/**\n * \u5927\u91cf\u30c7\u30fc\u30bf\u306e\u65e5\u4ed8\u51e6\u7406\u3092\u30d0\u30c3\u30c1\u3067\u52b9\u7387\u7684\u306b\u884c\u3046\n * \n * @param array $dataSource \u30c7\u30fc\u30bf\u30bd\u30fc\u30b9\uff08\u914d\u5217\u3084\u30a4\u30c6\u30ec\u30fc\u30bf\uff09\n * @param int $batchSize \u30d0\u30c3\u30c1\u30b5\u30a4\u30ba\n * @return array \u51e6\u7406\u7d50\u679c\n *\/\nfunction processDatesInBatches($dataSource, $batchSize = 1000) {\n $results = [];\n $batch = [];\n $count = 0;\n \n foreach ($dataSource as $item) {\n $batch[] = $item;\n $count++;\n \n \/\/ \u30d0\u30c3\u30c1\u30b5\u30a4\u30ba\u306b\u9054\u3057\u305f\u3089\u51e6\u7406\n if ($count % $batchSize === 0) {\n $results = array_merge($results, processBatch($batch));\n $batch = []; \/\/ \u30e1\u30e2\u30ea\u89e3\u653e\n }\n }\n \n \/\/ \u6b8b\u308a\u306e\u30d0\u30c3\u30c1\u3092\u51e6\u7406\n if (!empty($batch)) {\n $results = array_merge($results, processBatch($batch));\n }\n \n return $results;\n}\n\n\/\/ \u30d0\u30c3\u30c1\u51e6\u7406\u306e\u4f8b\nfunction processBatch($batch) {\n $results = [];\n foreach ($batch as $item) {\n \/\/ \u65e5\u4ed8\u51e6\u7406\n $timestamp = strtotime($item['date']);\n $item['formatted_date'] = date('Y-m-d', $timestamp);\n $item['is_recent'] = $timestamp > strtotime('-7 days');\n $results[] = $item;\n }\n return $results;\n}\n<\/pre>\n\n\n\n2. \u65e5\u4ed8\u7bc4\u56f2\u306e\u52b9\u7387\u7684\u306a\u751f\u6210<\/h4>\n\n\n\n
\/**\n * \u958b\u59cb\u65e5\u304b\u3089\u7d42\u4e86\u65e5\u307e\u3067\u306e\u65e5\u4ed8\u914d\u5217\u3092\u751f\u6210\u3059\u308b\n * \n * @param string $startDate \u958b\u59cb\u65e5\uff08Y-m-d\u5f62\u5f0f\uff09\n * @param string $endDate \u7d42\u4e86\u65e5\uff08Y-m-d\u5f62\u5f0f\uff09\n * @return array \u65e5\u4ed8\u306e\u914d\u5217\n *\/\nfunction generateDateRange($startDate, $endDate) {\n $startTimestamp = strtotime($startDate);\n $endTimestamp = strtotime($endDate);\n \n \/\/ \u7121\u9650\u30eb\u30fc\u30d7\u9632\u6b62\n if ($endTimestamp < $startTimestamp) {\n return [];\n }\n \n $dates = [];\n $currentTimestamp = $startTimestamp;\n \n \/\/ \u6bce\u56deDateTime \u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u751f\u6210\u3059\u308b\u3088\u308a\u52b9\u7387\u7684\n while ($currentTimestamp <= $endTimestamp) {\n $dates[] = date('Y-m-d', $currentTimestamp);\n $currentTimestamp = strtotime('+1 day', $currentTimestamp);\n }\n \n return $dates;\n}\n\n\/\/ DatePeriod\u3092\u4f7f\u7528\u3057\u305f\u3088\u308a\u52b9\u7387\u7684\u306a\u65b9\u6cd5\uff08PHP 5.3\u4ee5\u964d\uff09\nfunction generateDateRangeEfficient($startDate, $endDate) {\n $start = new DateTime($startDate);\n $end = new DateTime($endDate);\n $end->modify('+1 day'); \/\/ \u7d42\u4e86\u65e5\u3092\u542b\u3081\u308b\u305f\u3081\n \n $interval = new DateInterval('P1D'); \/\/ 1\u65e5\u9593\u9694\n $dateRange = new DatePeriod($start, $interval, $end);\n \n $dates = [];\n foreach ($dateRange as $date) {\n $dates[] = $date->format('Y-m-d');\n }\n \n return $dates;\n}\n<\/pre>\n\n\n\n3. \u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3092\u6d3b\u7528\u3057\u305f\u65e5\u4ed8\u51e6\u7406<\/h4>\n\n\n\n
\/\/ PHP\u3067\u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0\u3059\u308b\u975e\u52b9\u7387\u306a\u4f8b\nfunction filterDatesByPhp($records, $startDate, $endDate) {\n $start = strtotime($startDate);\n $end = strtotime($endDate);\n \n return array_filter($records, function($record) use ($start, $end) {\n $timestamp = strtotime($record['date']);\n return $timestamp >= $start && $timestamp <= $end;\n });\n}\n\n\/\/ SQL\u3067\u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0\u3059\u308b\u52b9\u7387\u7684\u306a\u4f8b\nfunction filterDatesBySql($pdo, $startDate, $endDate) {\n $sql = \"SELECT * FROM records WHERE date >= :start AND date <= :end\";\n $stmt = $pdo->prepare($sql);\n $stmt->execute([\n ':start' => $startDate,\n ':end' => $endDate\n ]);\n \n return $stmt->fetchAll(PDO::FETCH_ASSOC);\n}\n<\/pre>\n\n\n\n4. \u30e1\u30e2\u30ea\u4f7f\u7528\u91cf\u306e\u6700\u9069\u5316<\/h4>\n\n\n\n
\/\/ \u30b8\u30a7\u30cd\u30ec\u30fc\u30bf\u3092\u4f7f\u7528\u3057\u305f\u30e1\u30e2\u30ea\u52b9\u7387\u306e\u826f\u3044\u65e5\u4ed8\u7bc4\u56f2\u751f\u6210\nfunction dateRangeGenerator($startDate, $endDate) {\n $startTimestamp = strtotime($startDate);\n $endTimestamp = strtotime($endDate);\n \n if ($endTimestamp < $startTimestamp) {\n return;\n }\n \n $currentTimestamp = $startTimestamp;\n \n while ($currentTimestamp <= $endTimestamp) {\n yield date('Y-m-d', $currentTimestamp);\n $currentTimestamp = strtotime('+1 day', $currentTimestamp);\n }\n}\n\n\/\/ \u4f7f\u7528\u4f8b\n$startDate = '2023-01-01';\n$endDate = '2023-12-31';\n\n\/\/ \u30e1\u30e2\u30ea\u52b9\u7387\u826f\u304f\u51e6\u7406\nforeach (dateRangeGenerator($startDate, $endDate) as $date) {\n \/\/ \u5404\u65e5\u4ed8\u3092\u9806\u6b21\u51e6\u7406\uff08\u4e00\u5ea6\u306b\u5168\u3066\u306e\u65e5\u4ed8\u3092\u30e1\u30e2\u30ea\u306b\u4fdd\u6301\u3057\u306a\u3044\uff09\n processDate($date);\n}\n<\/pre>\n\n\n\nPHP 8.0\u4ee5\u964d\u3067\u306e\u65e5\u4ed8\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u306e\u65b0\u6a5f\u80fd\u3068\u6539\u5584\u70b9<\/h2>\n\n\n\n
PHP 8\u306e\u65e5\u4ed8\u51e6\u7406\u306b\u304a\u3051\u308b\u5909\u66f4\u70b9\u3068\u6d3b\u7528\u6cd5<\/h3>\n\n\n\n
1. DateTime\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u306e\u5c0e\u5165<\/h4>\n\n\n\n
DateTimeInterface<\/code>\u304c\u3088\u308a\u5f37\u5316\u3055\u308c\u3001\u578b\u5ba3\u8a00\u306a\u3069\u3067\u306e\u4f7f\u3044\u3084\u3059\u3055\u304c\u5411\u4e0a\u3057\u307e\u3057\u305f\u3002<\/p>\n\n\n\n\/**\n * DateTimeInterface\u3092\u6d3b\u7528\u3057\u305f\u95a2\u6570\n * \n * @param DateTimeInterface $date \u65e5\u4ed8\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\n * @return string \u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u6e08\u307f\u306e\u65e5\u4ed8\n *\/\nfunction formatDateTime(DateTimeInterface $date): string {\n return $date->format('Y-m-d H:i:s');\n}\n\n\/\/ \u4f7f\u7528\u4f8b\n$dateTime = new DateTime('2023-12-31');\n$dateTimeImmutable = new DateTimeImmutable('2023-12-31');\n\n\/\/ \u3069\u3061\u3089\u3082\u53d7\u3051\u4ed8\u3051\u3089\u308c\u308b\necho formatDateTime($dateTime);\necho formatDateTime($dateTimeImmutable);\n<\/pre>\n\n\n\n2. DateTime\u306e\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u3067\u306e\u53b3\u683c\u306a\u578b\u30c1\u30a7\u30c3\u30af<\/h4>\n\n\n\n
\/\/ PHP 7.x \u3067\u306f\u8b66\u544a\u3092\u51fa\u3059\u3060\u3051\u306e\u5834\u5408\u304c\u3042\u3063\u305f\u304c\u3001PHP 8\u3067\u306f\u4f8b\u5916\u3092\u30b9\u30ed\u30fc\ntry {\n $date = new DateTime('\u7121\u52b9\u306a\u65e5\u4ed8');\n} catch (Exception $e) {\n echo \"PHP 8\u3067\u306f\u7121\u52b9\u306a\u65e5\u4ed8\u306b\u5bfe\u3057\u3066\u660e\u78ba\u306a\u4f8b\u5916\u304c\u30b9\u30ed\u30fc\u3055\u308c\u307e\u3059: \" . $e->getMessage();\n}\n<\/pre>\n\n\n\n3. \u540d\u524d\u4ed8\u304d\u5f15\u6570\u306e\u30b5\u30dd\u30fc\u30c8<\/h4>\n\n\n\n
\/\/ PHP 8.0\u4ee5\u524d\u306e\u8a18\u8ff0\n$date = date_create_from_format('Y-m-d', '2023-12-31', new DateTimeZone('Asia\/Tokyo'));\n\n\/\/ PHP 8.0\u4ee5\u964d\u306e\u540d\u524d\u4ed8\u304d\u5f15\u6570\u3092\u4f7f\u7528\u3057\u305f\u8a18\u8ff0\n$date = date_create_from_format(\n format: 'Y-m-d',\n datetime: '2023-12-31',\n timezone: new DateTimeZone('Asia\/Tokyo')\n);\n\n\/\/ DateTime\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u4f5c\u6210\u3067\u3082\u540c\u69d8\u306b\u4f7f\u7528\u53ef\u80fd\n$dateTime = new DateTime(\n datetime: '2023-12-31',\n timezone: new DateTimeZone('Europe\/London')\n);\n<\/pre>\n\n\n\n4. DateTimeImmutable\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6539\u5584<\/h4>\n\n\n\n
DateTimeImmutable<\/code>\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u304c\u5927\u5e45\u306b\u6539\u5584\u3055\u308c\u3001\u53ef\u5909\u306eDateTime<\/code>\u3068\u306e\u5dee\u304c\u5c0f\u3055\u304f\u306a\u308a\u307e\u3057\u305f\u3002\u30a4\u30df\u30e5\u30fc\u30bf\u30d6\u30eb\u306a\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u4f7f\u7528\u3059\u308b\u5229\u70b9\uff08\u4e88\u671f\u3057\u306a\u3044\u5909\u66f4\u3092\u9632\u3050\uff09\u3092\u3088\u308a\u6d3b\u304b\u3057\u3084\u3059\u304f\u306a\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n\/\/ PHP 8\u4ee5\u964d\u3067\u306fDateTimeImmutable\u3092\u7a4d\u6975\u7684\u306b\u4f7f\u7528\u3067\u304d\u308b\nfunction calculateAgeImmutable(DateTimeImmutable $birthDate): int {\n $today = new DateTimeImmutable();\n $diff = $today->diff($birthDate);\n return $diff->y;\n}\n\n\/\/ \u8a95\u751f\u65e5\u304b\u3089\u5e74\u9f62\u3092\u8a08\u7b97\n$birthDate = new DateTimeImmutable('1990-01-15');\necho \"\u5e74\u9f62: \" . calculateAgeImmutable($birthDate);\n<\/pre>\n\n\n\n5. JIT\u30b3\u30f3\u30d1\u30a4\u30e9\u306b\u3088\u308b\u65e5\u4ed8\u51e6\u7406\u306e\u9ad8\u901f\u5316<\/h4>\n\n\n\n
\/\/ JIT\u304c\u52b9\u679c\u7684\u306a\u30eb\u30fc\u30d7\u51e6\u7406\uff08PHP 8\u4ee5\u964d\u3067\u9ad8\u901f\u5316\uff09\n$startTime = microtime(true);\n\n$dates = [];\nfor ($i = 0; $i < 100000; $i++) {\n $date = new DateTime();\n $date->modify(\"+{$i} seconds\");\n $dates[] = $date->format('Y-m-d H:i:s');\n}\n\n$endTime = microtime(true);\necho \"\u51e6\u7406\u6642\u9593: \" . ($endTime - $startTime) . \"\u79d2\";\n<\/pre>\n\n\n\n\u6700\u65b0\u30d0\u30fc\u30b8\u30e7\u30f3\u3067\u4f7f\u3048\u308b\u65e5\u4ed8\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u306e\u30b7\u30e7\u30fc\u30c8\u30ab\u30c3\u30c8<\/h3>\n\n\n\n
1. Constructor Property Promotion\u3092\u6d3b\u7528\u3057\u305f\u30b7\u30f3\u30d7\u30eb\u306a\u65e5\u4ed8\u30af\u30e9\u30b9<\/h4>\n\n\n\n
\/\/ PHP 8.0\u4ee5\u964d\u306e\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u30d7\u30ed\u30d1\u30c6\u30a3\u30d7\u30ed\u30e2\u30fc\u30b7\u30e7\u30f3\nclass DateRange {\n public function __construct(\n public readonly DateTimeImmutable $startDate,\n public readonly DateTimeImmutable $endDate\n ) {\n if ($this->startDate > $this->endDate) {\n throw new InvalidArgumentException('\u958b\u59cb\u65e5\u306f\u7d42\u4e86\u65e5\u3088\u308a\u524d\u3067\u306a\u3051\u308c\u3070\u306a\u308a\u307e\u305b\u3093');\n }\n }\n \n \/\/ \u65e5\u6570\u3092\u8a08\u7b97\n public function getDays(): int {\n return (int)$this->startDate->diff($this->endDate)->format('%a') + 1;\n }\n \n \/\/ \u671f\u9593\u5185\u304b\u30c1\u30a7\u30c3\u30af\n public function includes(DateTimeInterface $date): bool {\n return $date >= $this->startDate && $date <= $this->endDate;\n }\n}\n\n\/\/ \u4f7f\u7528\u4f8b\n$range = new DateRange(\n new DateTimeImmutable('2023-01-01'),\n new DateTimeImmutable('2023-01-31')\n);\n\necho \"\u671f\u9593\u306e\u65e5\u6570: \" . $range->getDays() . \"\u65e5\\n\";\n$testDate = new DateTime('2023-01-15');\necho \"\u30c6\u30b9\u30c8\u65e5\u4ed8\u306f\u671f\u9593\u5185\u304b: \" . ($range->includes($testDate) ? \"\u306f\u3044\" : \"\u3044\u3044\u3048\");\n<\/pre>\n\n\n\n2. match\u5f0f\u306b\u3088\u308b\u65e5\u4ed8\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u9078\u629e<\/h4>\n\n\n\n
match<\/code>\u5f0f\u3092\u4f7f\u7528\u3059\u308b\u3068\u3001\u6761\u4ef6\u306b\u57fa\u3065\u3044\u3066\u65e5\u4ed8\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u3092\u9078\u629e\u3059\u308b\u51e6\u7406\u304c\u7c21\u6f54\u306b\u66f8\u3051\u307e\u3059\u3002<\/p>\n\n\n\n\/**\n * \u8868\u793a\u30b3\u30f3\u30c6\u30ad\u30b9\u30c8\u306b\u5fdc\u3058\u305f\u65e5\u4ed8\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u3092\u8fd4\u3059\n * \n * @param string $context \u8868\u793a\u30b3\u30f3\u30c6\u30ad\u30b9\u30c8\n * @return string \u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u30d1\u30bf\u30fc\u30f3\n *\/\nfunction getDateFormatByContext(string $context): string {\n return match ($context) {\n 'database' => 'Y-m-d H:i:s',\n 'api' => 'c', \/\/ ISO 8601\n 'japanese' => 'Y\u5e74m\u6708d\u65e5',\n 'short' => 'y\/m\/d',\n 'friendly' => 'M j, Y',\n default => 'Y-m-d',\n };\n}\n\n\/\/ \u4f7f\u7528\u4f8b\n$date = new DateTime();\n$contexts = ['database', 'api', 'japanese', 'short', 'friendly'];\n\nforeach ($contexts as $context) {\n $format = getDateFormatByContext($context);\n echo \"{$context}: \" . $date->format($format) . \"\\n\";\n}\n<\/pre>\n\n\n\n3. Null\u5b89\u5168\u6f14\u7b97\u5b50\u3092\u4f7f\u3063\u305f\u65e5\u4ed8\u51e6\u7406<\/h4>\n\n\n\n
?-><\/code>\uff09\u306f\u3001Nullable\u306a\u65e5\u4ed8\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u6271\u3046\u969b\u306b\u4fbf\u5229\u3067\u3059\u3002<\/p>\n\n\n\n\/**\n * \u30e6\u30fc\u30b6\u30fc\u306e\u8a95\u751f\u65e5\u3092\u8868\u793a\uff08\u8a95\u751f\u65e5\u304c\u672a\u8a2d\u5b9a\u306e\u5834\u5408\u3082\u30a8\u30e9\u30fc\u306b\u306a\u3089\u306a\u3044\uff09\n * \n * @param User $user \u30e6\u30fc\u30b6\u30fc\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\uff08birthDate\u30d7\u30ed\u30d1\u30c6\u30a3\u3092\u6301\u3064\uff09\n * @return string \u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u3055\u308c\u305f\u8a95\u751f\u65e5\u307e\u305f\u306f\u300c\u672a\u8a2d\u5b9a\u300d\n *\/\nfunction displayBirthDate(User $user): string {\n \/\/ Null\u5b89\u5168\u6f14\u7b97\u5b50\u3092\u4f7f\u7528\u3059\u308b\u3068\u3001birthDate\u304cnull\u3067\u3082\u30a8\u30e9\u30fc\u306b\u306a\u3089\u306a\u3044\n return $user->birthDate?->format('Y\u5e74m\u6708d\u65e5') ?? '\u672a\u8a2d\u5b9a';\n}\n\n\/\/ \u4f7f\u7528\u4f8b\nclass User {\n public function __construct(\n public string $name,\n public ?DateTimeImmutable $birthDate = null\n ) {}\n}\n\n$user1 = new User('\u5c71\u7530\u592a\u90ce', new DateTimeImmutable('1990-05-15'));\n$user2 = new User('\u4f50\u85e4\u82b1\u5b50');\n\necho $user1->name . \"\u306e\u8a95\u751f\u65e5: \" . displayBirthDate($user1) . \"\\n\";\necho $user2->name . \"\u306e\u8a95\u751f\u65e5: \" . displayBirthDate($user2);\n<\/pre>\n\n\n\n4. \u5c5e\u6027\uff08Attributes\uff09\u3092\u6d3b\u7528\u3057\u305f\u65e5\u4ed8\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3<\/h4>\n\n\n\n
\/**\n * \u65e5\u4ed8\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u3092\u691c\u8a3c\u3059\u308b\u5c5e\u6027\n *\/\n#[Attribute]\nclass DateFormat {\n public function __construct(public string $format = 'Y-m-d') {}\n \n public function validate(string $date): bool {\n $dateTime = DateTime::createFromFormat($this->format, $date);\n return $dateTime && $dateTime->format($this->format) === $date;\n }\n}\n\n\/\/ \u5c5e\u6027\u3092\u4f7f\u7528\u3057\u305f\u30af\u30e9\u30b9\nclass Event {\n #[DateFormat('Y-m-d')]\n public string $eventDate;\n \n #[DateFormat('H:i')]\n public string $eventTime;\n \n public function __construct(string $date, string $time) {\n $this->setEventDate($date);\n $this->setEventTime($time);\n }\n \n public function setEventDate(string $date): void {\n \/\/ \u5b9f\u969b\u306e\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3067\u306f\u3001\u30ea\u30d5\u30ec\u30af\u30b7\u30e7\u30f3API\u3092\u4f7f\u3063\u3066\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u3092\u884c\u3046\n $attribute = new DateFormat();\n if (!$attribute->validate($date)) {\n throw new InvalidArgumentException('\u7121\u52b9\u306a\u65e5\u4ed8\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u3067\u3059');\n }\n $this->eventDate = $date;\n }\n \n public function setEventTime(string $time): void {\n $attribute = new DateFormat('H:i');\n if (!$attribute->validate($time)) {\n throw new InvalidArgumentException('\u7121\u52b9\u306a\u6642\u523b\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u3067\u3059');\n }\n $this->eventTime = $time;\n }\n}\n\n\/\/ \u4f7f\u7528\u4f8b\ntry {\n $event = new Event('2023-12-31', '14:30');\n echo \"\u30a4\u30d9\u30f3\u30c8\u65e5\u6642: {$event->eventDate} {$event->eventTime}\";\n} catch (InvalidArgumentException $e) {\n echo \"\u30a8\u30e9\u30fc: \" . $e->getMessage();\n}\n<\/pre>\n\n\n\n\u5b9f\u88c5\u4f8b\u3067\u5b66\u3076\uff1a\u65e5\u4ed8\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u306e\u5b9f\u8df5\u7684\u30e6\u30fc\u30b9\u30b1\u30fc\u30b9<\/h2>\n\n\n\n
\u4e88\u7d04\u30b7\u30b9\u30c6\u30e0\u306b\u304a\u3051\u308b\u65e5\u6642\u8868\u793a\u306e\u5b9f\u88c5\u4f8b<\/h3>\n\n\n\n
\u4e88\u7d04\u30af\u30e9\u30b9\u306e\u57fa\u672c\u69cb\u9020<\/h4>\n\n\n\n
\/**\n * \u4e88\u7d04\u30b7\u30b9\u30c6\u30e0\u306e\u4e88\u7d04\u30af\u30e9\u30b9\n *\/\nclass Reservation {\n private DateTimeImmutable $reservationDateTime;\n private DateTimeZone $timezone;\n private string $customerName;\n private int $partySize;\n private string $status;\n \n \/**\n * \u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\n * \n * @param string $dateTime \u4e88\u7d04\u65e5\u6642\uff08\u4f8b: '2023-12-31 18:00:00'\uff09\n * @param string $customerName \u9867\u5ba2\u540d\n * @param int $partySize \u4eba\u6570\n * @param string $timezoneId \u30bf\u30a4\u30e0\u30be\u30fc\u30f3ID\uff08\u30c7\u30d5\u30a9\u30eb\u30c8: 'Asia\/Tokyo'\uff09\n *\/\n public function __construct(\n string $dateTime,\n string $customerName,\n int $partySize,\n string $timezoneId = 'Asia\/Tokyo'\n ) {\n $this->timezone = new DateTimeZone($timezoneId);\n $this->reservationDateTime = new DateTimeImmutable($dateTime, $this->timezone);\n $this->customerName = $customerName;\n $this->partySize = $partySize;\n $this->status = 'confirmed'; \/\/ \u30c7\u30d5\u30a9\u30eb\u30c8\u306f\u78ba\u5b9a\u72b6\u614b\n }\n \n \/**\n * \u4e88\u7d04\u65e5\u6642\u3092\u53d6\u5f97\n * \n * @return DateTimeImmutable\n *\/\n public function getDateTime(): DateTimeImmutable {\n return $this->reservationDateTime;\n }\n \n \/**\n * \u4e88\u7d04\u65e5\u306e\u307f\u3092\u53d6\u5f97\uff08\u6642\u523b\u306a\u3057\uff09\n * \n * @return string \u65e5\u4ed8\u306e\u307f\uff08Y-m-d\u5f62\u5f0f\uff09\n *\/\n public function getDate(): string {\n return $this->reservationDateTime->format('Y-m-d');\n }\n \n \/**\n * \u4e88\u7d04\u6642\u523b\u306e\u307f\u3092\u53d6\u5f97\uff08\u65e5\u4ed8\u306a\u3057\uff09\n * \n * @return string \u6642\u523b\u306e\u307f\uff08H:i\u5f62\u5f0f\uff09\n *\/\n public function getTime(): string {\n return $this->reservationDateTime->format('H:i');\n }\n \n \/**\n * \u9867\u5ba2\u5411\u3051\u8868\u793a\u7528\u306e\u65e5\u6642\u3092\u53d6\u5f97\n * \n * @param string $locale \u30ed\u30b1\u30fc\u30eb\uff08\u4f8b: 'ja_JP'\uff09\n * @return string \u9867\u5ba2\u5411\u3051\u306b\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u3055\u308c\u305f\u65e5\u6642\n *\/\n public function getFormattedDateTime(string $locale = 'ja_JP'): string {\n $formatter = new IntlDateFormatter(\n $locale,\n IntlDateFormatter::LONG,\n IntlDateFormatter::SHORT,\n $this->timezone->getName()\n );\n \n return $formatter->format($this->reservationDateTime);\n }\n \n \/**\n * \u4e88\u7d04\u304c\u6307\u5b9a\u3055\u308c\u305f\u65e5\u6570\u4ee5\u5185\u304b\u3069\u3046\u304b\u3092\u5224\u5b9a\n * \n * @param int $days \u65e5\u6570\n * @return bool \u6307\u5b9a\u3055\u308c\u305f\u65e5\u6570\u4ee5\u5185\u306a\u3089true\n *\/\n public function isWithinDays(int $days): bool {\n $now = new DateTimeImmutable('now', $this->timezone);\n $diff = $this->reservationDateTime->diff($now);\n \n return $diff->days <= $days && $this->reservationDateTime > $now;\n }\n \n \/**\n * \u4e88\u7d04\u60c5\u5831\u306e\u6587\u5b57\u5217\u8868\u73fe\u3092\u53d6\u5f97\n * \n * @return string \u4e88\u7d04\u60c5\u5831\n *\/\n public function __toString(): string {\n return sprintf(\n \"\u4e88\u7d04: %s\u69d8 %s\u540d - %s (%s)\",\n $this->customerName,\n $this->partySize,\n $this->getFormattedDateTime(),\n $this->status\n );\n }\n}\n<\/pre>\n\n\n\n\u4e88\u7d04\u7ba1\u7406\u30af\u30e9\u30b9\u306e\u5b9f\u88c5<\/h4>\n\n\n\n
\/**\n * \u4e88\u7d04\u7ba1\u7406\u30af\u30e9\u30b9\n *\/\nclass ReservationManager {\n private array $reservations = [];\n \n \/**\n * \u4e88\u7d04\u3092\u8ffd\u52a0\n * \n * @param Reservation $reservation \u8ffd\u52a0\u3059\u308b\u4e88\u7d04\n *\/\n public function addReservation(Reservation $reservation): void {\n $this->reservations[] = $reservation;\n }\n \n \/**\n * \u6307\u5b9a\u65e5\u306e\u4e88\u7d04\u3092\u53d6\u5f97\n * \n * @param string $date \u65e5\u4ed8\uff08Y-m-d\u5f62\u5f0f\uff09\n * @return array \u305d\u306e\u65e5\u306e\u4e88\u7d04\u306e\u914d\u5217\n *\/\n public function getReservationsByDate(string $date): array {\n return array_filter($this->reservations, function(Reservation $reservation) use ($date) {\n return $reservation->getDate() === $date;\n });\n }\n \n \/**\n * \u6307\u5b9a\u65e5\u306e\u4e88\u7d04\u72b6\u6cc1\u3092HTML\u5f62\u5f0f\u3067\u51fa\u529b\n * \n * @param string $date \u65e5\u4ed8\uff08Y-m-d\u5f62\u5f0f\u307e\u305f\u306f'today'\uff09\n * @return string HTML\u5f62\u5f0f\u306e\u4e88\u7d04\u72b6\u6cc1\n *\/\n public function generateDailyScheduleHtml(string $date = 'today'): string {\n if ($date === 'today') {\n $targetDate = (new DateTime())->format('Y-m-d');\n } else {\n $targetDate = $date;\n }\n \n $dateObj = new DateTime($targetDate);\n $formattedDate = $dateObj->format('Y\u5e74m\u6708d\u65e5');\n $weekday = $this->getJapaneseWeekday($dateObj);\n \n $reservations = $this->getReservationsByDate($targetDate);\n \n \/\/ \u6642\u9593\u5e2f\u3054\u3068\u306b\u4e88\u7d04\u3092\u6574\u7406\n $timeSlots = [];\n foreach ($reservations as $reservation) {\n $time = $reservation->getTime();\n if (!isset($timeSlots[$time])) {\n $timeSlots[$time] = [];\n }\n $timeSlots[$time][] = $reservation;\n }\n \n \/\/ \u4e88\u7d04\u6642\u9593\u3067\u4e26\u3079\u66ff\u3048\n ksort($timeSlots);\n \n \/\/ HTML\u751f\u6210\n $html = \"<h2>{$formattedDate}\uff08{$weekday}\uff09\u306e\u4e88\u7d04\u72b6\u6cc1<\/h2>\\n\";\n \n if (empty($timeSlots)) {\n $html .= \"<p>\u4e88\u7d04\u306f\u3042\u308a\u307e\u305b\u3093\u3002<\/p>\\n\";\n } else {\n $html .= \"<table border='1'>\\n\";\n $html .= \" <tr><th>\u6642\u9593<\/th><th>\u9867\u5ba2\u540d<\/th><th>\u4eba\u6570<\/th><th>\u30b9\u30c6\u30fc\u30bf\u30b9<\/th><\/tr>\\n\";\n \n foreach ($timeSlots as $time => $reservationsAtTime) {\n foreach ($reservationsAtTime as $index => $reservation) {\n $rowspan = $index === 0 ? count($reservationsAtTime) : 0;\n \n $html .= \" <tr>\\n\";\n \n if ($rowspan > 0) {\n $html .= \" <td rowspan='{$rowspan}'>{$time}<\/td>\\n\";\n }\n \n $html .= \" <td>{$reservation->customerName}<\/td>\\n\";\n $html .= \" <td>{$reservation->partySize}\u540d<\/td>\\n\";\n $html .= \" <td>{$reservation->status}<\/td>\\n\";\n $html .= \" <\/tr>\\n\";\n }\n }\n \n $html .= \"<\/table>\\n\";\n }\n \n return $html;\n }\n \n \/**\n * \u66dc\u65e5\u3092\u65e5\u672c\u8a9e\u306b\u5909\u63db\n * \n * @param DateTime $date \u65e5\u4ed8\n * @return string \u65e5\u672c\u8a9e\u306e\u66dc\u65e5\n *\/\n private function getJapaneseWeekday(DateTime $date): string {\n $weekdays = ['\u65e5', '\u6708', '\u706b', '\u6c34', '\u6728', '\u91d1', '\u571f'];\n return $weekdays[(int)$date->format('w')];\n }\n \n \/**\n * \u76f4\u8fd1\u306e\u4e88\u7d04\u3092\u53d6\u5f97\n * \n * @param int $days \u4eca\u5f8c\u4f55\u65e5\u4ee5\u5185\u306e\u4e88\u7d04\u3092\u53d6\u5f97\u3059\u308b\u304b\n * @return array \u76f4\u8fd1\u306e\u4e88\u7d04\u306e\u914d\u5217\n *\/\n public function getUpcomingReservations(int $days = 7): array {\n return array_filter($this->reservations, function(Reservation $reservation) use ($days) {\n return $reservation->isWithinDays($days);\n });\n }\n \n \/**\n * \u4e88\u7d04\u78ba\u8a8d\u30e1\u30fc\u30eb\u7528\u306e\u65e5\u6642\u6587\u5b57\u5217\u3092\u751f\u6210\n * \n * @param Reservation $reservation \u4e88\u7d04\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\n * @return string \u30e1\u30fc\u30eb\u7528\u306e\u65e5\u6642\u6587\u5b57\u5217\n *\/\n public function generateConfirmationDateString(Reservation $reservation): string {\n $dateTime = $reservation->getDateTime();\n \n $year = $dateTime->format('Y');\n $month = $dateTime->format('n');\n $day = $dateTime->format('j');\n $weekday = $this->getJapaneseWeekday(\n (new DateTime())->setTimestamp($dateTime->getTimestamp())\n );\n $time = $dateTime->format('H:i');\n \n return \"{$year}\u5e74{$month}\u6708{$day}\u65e5\uff08{$weekday}\uff09 {$time}\";\n }\n}\n<\/pre>\n\n\n\n\u4e88\u7d04\u30b7\u30b9\u30c6\u30e0\u306e\u4f7f\u7528\u4f8b<\/h4>\n\n\n\n
\/\/ \u4f7f\u7528\u4f8b\n$manager = new ReservationManager();\n\n\/\/ \u4e88\u7d04\u3092\u8ffd\u52a0\n$manager->addReservation(new Reservation(\n '2023-12-31 18:00:00',\n '\u5c71\u7530\u592a\u90ce',\n 4\n));\n\n$manager->addReservation(new Reservation(\n '2023-12-31 18:30:00',\n '\u4f50\u85e4\u82b1\u5b50',\n 2\n));\n\n$manager->addReservation(new Reservation(\n '2023-12-31 19:00:00',\n '\u9234\u6728\u4e00\u90ce',\n 6\n));\n\n\/\/ \u7279\u5b9a\u306e\u65e5\u306e\u4e88\u7d04\u72b6\u6cc1\u3092HTML\u5f62\u5f0f\u3067\u53d6\u5f97\n$scheduleHtml = $manager->generateDailyScheduleHtml('2023-12-31');\necho $scheduleHtml;\n\n\/\/ \u4e88\u7d04\u78ba\u8a8d\u30e1\u30fc\u30eb\u7528\u306e\u65e5\u6642\u6587\u5b57\u5217\u3092\u751f\u6210\n$reservation = new Reservation('2023-12-25 12:00:00', '\u7530\u4e2d\u8aa0', 3);\n$confirmationDate = $manager->generateConfirmationDateString($reservation);\necho \"\u3054\u4e88\u7d04\u3042\u308a\u304c\u3068\u3046\u3054\u3056\u3044\u307e\u3059\u3002{$confirmationDate}\u306b\u304a\u5f85\u3061\u3057\u3066\u304a\u308a\u307e\u3059\u3002\";\n<\/pre>\n\n\n\n\n
DateTimeImmutable<\/code> \u3092\u4f7f\u7528\u3057\u3066\u3001\u4e88\u7d04\u65e5\u6642\u306e\u4e0d\u5909\u6027\u3092\u4fdd\u8a3c<\/li>\n\n\n\nIntlDateFormatter<\/code> \u3092\u4f7f\u7528\u3057\u3066\u3001\u591a\u8a00\u8a9e\u5bfe\u5fdc\u3092\u5bb9\u6613\u306b\u3057\u3066\u3044\u308b<\/li>\n\n\n\n\u30ed\u30b0\u51fa\u529b\u3084\u30c7\u30fc\u30bf\u5206\u6790\u3067\u306e\u65e5\u4ed8\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u6d3b\u7528\u8853<\/h3>\n\n\n\n
\u30ed\u30b0\u30a8\u30f3\u30c8\u30ea\u30af\u30e9\u30b9<\/h4>\n\n\n\n
\/**\n * \u30ed\u30b0\u30a8\u30f3\u30c8\u30ea\u30af\u30e9\u30b9\n *\/\nclass LogEntry {\n private DateTimeImmutable $timestamp;\n private string $ipAddress;\n private string $endpoint;\n private int $responseCode;\n private float $responseTime;\n \n \/**\n * \u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\n * \n * @param string $timestamp \u30bf\u30a4\u30e0\u30b9\u30bf\u30f3\u30d7\u6587\u5b57\u5217\n * @param string $ipAddress IP\u30a2\u30c9\u30ec\u30b9\n * @param string $endpoint \u30a2\u30af\u30bb\u30b9\u3055\u308c\u305f\u30a8\u30f3\u30c9\u30dd\u30a4\u30f3\u30c8\n * @param int $responseCode HTTP\u30ec\u30b9\u30dd\u30f3\u30b9\u30b3\u30fc\u30c9\n * @param float $responseTime \u30ec\u30b9\u30dd\u30f3\u30b9\u6642\u9593\uff08\u79d2\uff09\n *\/\n public function __construct(\n string $timestamp,\n string $ipAddress,\n string $endpoint,\n int $responseCode,\n float $responseTime\n ) {\n $this->timestamp = new DateTimeImmutable($timestamp);\n $this->ipAddress = $ipAddress;\n $this->endpoint = $endpoint;\n $this->responseCode = $responseCode;\n $this->responseTime = $responseTime;\n }\n \n \/**\n * \u30bf\u30a4\u30e0\u30b9\u30bf\u30f3\u30d7\u3092\u53d6\u5f97\n * \n * @return DateTimeImmutable\n *\/\n public function getTimestamp(): DateTimeImmutable {\n return $this->timestamp;\n }\n \n \/**\n * \u65e5\u4ed8\u3092\u53d6\u5f97\uff08YYYY-MM-DD\u5f62\u5f0f\uff09\n * \n * @return string\n *\/\n public function getDate(): string {\n return $this->timestamp->format('Y-m-d');\n }\n \n \/**\n * \u6642\u523b\u3092\u53d6\u5f97\uff08HH:MM:SS\u5f62\u5f0f\uff09\n * \n * @return string\n *\/\n public function getTime(): string {\n return $this->timestamp->format('H:i:s');\n }\n \n \/**\n * \u6642\u9593\u5e2f\uff08\u6642\u9593\u5358\u4f4d\uff09\u3092\u53d6\u5f97\n * \n * @return int 0-23\u306e\u6642\u9593\n *\/\n public function getHour(): int {\n return (int)$this->timestamp->format('G');\n }\n \n \/**\n * \u66dc\u65e5\u3092\u53d6\u5f97\uff080=\u65e5\u66dc, 6=\u571f\u66dc\uff09\n * \n * @return int\n *\/\n public function getDayOfWeek(): int {\n return (int)$this->timestamp->format('w');\n }\n \n \/**\n * \u30a8\u30e9\u30fc\u30ec\u30b9\u30dd\u30f3\u30b9\u304b\u3069\u3046\u304b\u3092\u5224\u5b9a\n * \n * @return bool\n *\/\n public function isError(): bool {\n return $this->responseCode >= 400;\n }\n \n \/**\n * \u30ec\u30b9\u30dd\u30f3\u30b9\u6642\u9593\uff08\u79d2\uff09\u3092\u53d6\u5f97\n * \n * @return float\n *\/\n public function getResponseTime(): float {\n return $this->responseTime;\n }\n \n \/**\n * \u30a8\u30f3\u30c9\u30dd\u30a4\u30f3\u30c8\u3092\u53d6\u5f97\n * \n * @return string\n *\/\n public function getEndpoint(): string {\n return $this->endpoint;\n }\n \n \/**\n * IP\u30a2\u30c9\u30ec\u30b9\u3092\u53d6\u5f97\n * \n * @return string\n *\/\n public function getIpAddress(): string {\n return $this->ipAddress;\n }\n}\n<\/pre>\n\n\n\n\u30ed\u30b0\u5206\u6790\u30af\u30e9\u30b9<\/h4>\n\n\n\n
\/**\n * \u30ed\u30b0\u5206\u6790\u30af\u30e9\u30b9\n *\/\nclass LogAnalyzer {\n private array $logEntries = [];\n \n \/**\n * \u30ed\u30b0\u30a8\u30f3\u30c8\u30ea\u3092\u8ffd\u52a0\n * \n * @param LogEntry $entry \u30ed\u30b0\u30a8\u30f3\u30c8\u30ea\n *\/\n public function addLogEntry(LogEntry $entry): void {\n $this->logEntries[] = $entry;\n }\n \n \/**\n * \u30ed\u30b0\u30d5\u30a1\u30a4\u30eb\u304b\u3089\u30ed\u30b0\u30a8\u30f3\u30c8\u30ea\u3092\u8aad\u307f\u8fbc\u3080\n * \n * @param string $logFile \u30ed\u30b0\u30d5\u30a1\u30a4\u30eb\u306e\u30d1\u30b9\n *\/\n public function loadFromFile(string $logFile): void {\n $handle = fopen($logFile, 'r');\n \n if ($handle) {\n while (($line = fgets($handle)) !== false) {\n \/\/ \u30ed\u30b0\u884c\u3092\u30d1\u30fc\u30b9\u3057\u3066 LogEntry \u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u751f\u6210\n \/\/ \u4f8b: 2023-12-31 23:59:59 192.168.1.1 \/api\/users 200 0.123\n $parts = explode(' ', trim($line));\n \n if (count($parts) >= 6) {\n $timestamp = $parts[0] . ' ' . $parts[1];\n $ipAddress = $parts[2];\n $endpoint = $parts[3];\n $responseCode = (int)$parts[4];\n $responseTime = (float)$parts[5];\n \n $this->addLogEntry(new LogEntry(\n $timestamp,\n $ipAddress,\n $endpoint,\n $responseCode,\n $responseTime\n ));\n }\n }\n \n fclose($handle);\n }\n }\n \n \/**\n * \u65e5\u5225\u306e\u30a2\u30af\u30bb\u30b9\u6570\u3092\u96c6\u8a08\n * \n * @return array \u65e5\u4ed8=>\u30a2\u30af\u30bb\u30b9\u6570\u306e\u9023\u60f3\u914d\u5217\n *\/\n public function getDailyAccessCounts(): array {\n $counts = [];\n \n foreach ($this->logEntries as $entry) {\n $date = $entry->getDate();\n \n if (!isset($counts[$date])) {\n $counts[$date] = 0;\n }\n \n $counts[$date]++;\n }\n \n \/\/ \u65e5\u4ed8\u9806\u306b\u30bd\u30fc\u30c8\n ksort($counts);\n \n return $counts;\n }\n \n \/**\n * \u6642\u9593\u5e2f\u5225\u306e\u30a2\u30af\u30bb\u30b9\u6570\u3092\u96c6\u8a08\n * \n * @return array \u6642\u9593=>\u30a2\u30af\u30bb\u30b9\u6570\u306e\u9023\u60f3\u914d\u5217\n *\/\n public function getHourlyAccessCounts(): array {\n $counts = array_fill(0, 24, 0);\n \n foreach ($this->logEntries as $entry) {\n $hour = $entry->getHour();\n $counts[$hour]++;\n }\n \n return $counts;\n }\n \n \/**\n * \u66dc\u65e5\u5225\u306e\u30a2\u30af\u30bb\u30b9\u6570\u3092\u96c6\u8a08\n * \n * @param bool $useJapaneseWeekdays \u65e5\u672c\u8a9e\u306e\u66dc\u65e5\u540d\u3092\u4f7f\u7528\u3059\u308b\u304b\u3069\u3046\u304b\n * @return array \u66dc\u65e5=>\u30a2\u30af\u30bb\u30b9\u6570\u306e\u9023\u60f3\u914d\u5217\n *\/\n public function getWeekdayAccessCounts(bool $useJapaneseWeekdays = true): array {\n $counts = array_fill(0, 7, 0);\n \n foreach ($this->logEntries as $entry) {\n $dayOfWeek = $entry->getDayOfWeek();\n $counts[$dayOfWeek]++;\n }\n \n if ($useJapaneseWeekdays) {\n $weekdays = ['\u65e5', '\u6708', '\u706b', '\u6c34', '\u6728', '\u91d1', '\u571f'];\n $namedCounts = [];\n \n foreach ($counts as $day => $count) {\n $namedCounts[$weekdays[$day]] = $count;\n }\n \n return $namedCounts;\n }\n \n return $counts;\n }\n \n \/**\n * \u30a8\u30f3\u30c9\u30dd\u30a4\u30f3\u30c8\u5225\u306e\u30a8\u30e9\u30fc\u7387\u3092\u8a08\u7b97\n * \n * @return array \u30a8\u30f3\u30c9\u30dd\u30a4\u30f3\u30c8=>\u30a8\u30e9\u30fc\u7387\u306e\u9023\u60f3\u914d\u5217\n *\/\n public function getEndpointErrorRates(): array {\n $totalCounts = [];\n $errorCounts = [];\n \n foreach ($this->logEntries as $entry) {\n $endpoint = $entry->getEndpoint();\n \n if (!isset($totalCounts[$endpoint])) {\n $totalCounts[$endpoint] = 0;\n $errorCounts[$endpoint] = 0;\n }\n \n $totalCounts[$endpoint]++;\n \n if ($entry->isError()) {\n $errorCounts[$endpoint]++;\n }\n }\n \n $errorRates = [];\n foreach ($totalCounts as $endpoint => $total) {\n $errorRates[$endpoint] = $total > 0 \n ? round(($errorCounts[$endpoint] \/ $total) * 100, 2)\n : 0;\n }\n \n \/\/ \u30a8\u30e9\u30fc\u7387\u306e\u9ad8\u3044\u9806\u306b\u30bd\u30fc\u30c8\n arsort($errorRates);\n \n return $errorRates;\n }\n \n \/**\n * \u6307\u5b9a\u671f\u9593\u5185\u306e\u30ec\u30b9\u30dd\u30f3\u30b9\u6642\u9593\u5e73\u5747\u3092\u8a08\u7b97\n * \n * @param string $startDate \u958b\u59cb\u65e5\uff08Y-m-d\u5f62\u5f0f\uff09\n * @param string $endDate \u7d42\u4e86\u65e5\uff08Y-m-d\u5f62\u5f0f\uff09\n * @return float \u5e73\u5747\u30ec\u30b9\u30dd\u30f3\u30b9\u6642\u9593\uff08\u79d2\uff09\n *\/\n public function getAverageResponseTime(string $startDate, string $endDate): float {\n $startDateTime = new DateTimeImmutable($startDate . ' 00:00:00');\n $endDateTime = new DateTimeImmutable($endDate . ' 23:59:59');\n \n $totalTime = 0;\n $count = 0;\n \n foreach ($this->logEntries as $entry) {\n $timestamp = $entry->getTimestamp();\n \n if ($timestamp >= $startDateTime && $timestamp <= $endDateTime) {\n $totalTime += $entry->getResponseTime();\n $count++;\n }\n }\n \n return $count > 0 ? $totalTime \/ $count : 0;\n }\n \n \/**\n * \u5206\u6790\u30ec\u30dd\u30fc\u30c8\u3092CSV\u5f62\u5f0f\u3067\u51fa\u529b\n * \n * @param string $outputFile \u51fa\u529b\u30d5\u30a1\u30a4\u30eb\u30d1\u30b9\n *\/\n public function exportDailyReportToCsv(string $outputFile): void {\n $dailyCounts = $this->getDailyAccessCounts();\n \n $handle = fopen($outputFile, 'w');\n \n if ($handle) {\n \/\/ \u30d8\u30c3\u30c0\u30fc\u884c\n fputcsv($handle, ['\u65e5\u4ed8', '\u30a2\u30af\u30bb\u30b9\u6570', '\u30a8\u30e9\u30fc\u6570', '\u30a8\u30e9\u30fc\u7387(%)', '\u5e73\u5747\u30ec\u30b9\u30dd\u30f3\u30b9\u6642\u9593(\u79d2)']);\n \n foreach ($dailyCounts as $date => $totalCount) {\n $errorCount = 0;\n $totalResponseTime = 0;\n \n \/\/ \u8a72\u5f53\u65e5\u306e\u30a8\u30f3\u30c8\u30ea\u3092\u96c6\u8a08\n foreach ($this->logEntries as $entry) {\n if ($entry->getDate() === $date) {\n if ($entry->isError()) {\n $errorCount++;\n }\n $totalResponseTime += $entry->getResponseTime();\n }\n }\n \n $errorRate = $totalCount > 0 ? round(($errorCount \/ $totalCount) * 100, 2) : 0;\n $avgResponseTime = $totalCount > 0 ? round($totalResponseTime \/ $totalCount, 3) : 0;\n \n \/\/ \u30c7\u30fc\u30bf\u884c\n fputcsv($handle, [\n $date,\n $totalCount,\n $errorCount,\n $errorRate,\n $avgResponseTime\n ]);\n }\n \n fclose($handle);\n }\n }\n}\n<\/pre>\n\n\n\n\u30ed\u30b0\u5206\u6790\u306e\u4f7f\u7528\u4f8b<\/h4>\n\n\n\n
\/\/ \u4f7f\u7528\u4f8b\n$analyzer = new LogAnalyzer();\n\n\/\/ \u30ed\u30b0\u30d5\u30a1\u30a4\u30eb\u304b\u3089\u8aad\u307f\u8fbc\u307f\n$analyzer->loadFromFile('access.log');\n\n\/\/ \u65e5\u5225\u30a2\u30af\u30bb\u30b9\u6570\u3092\u53d6\u5f97\n$dailyCounts = $analyzer->getDailyAccessCounts();\necho \"\u65e5\u5225\u30a2\u30af\u30bb\u30b9\u6570:\\n\";\nforeach ($dailyCounts as $date => $count) {\n echo \"{$date}: {$count}\u4ef6\\n\";\n}\n\n\/\/ \u6642\u9593\u5e2f\u5225\u30a2\u30af\u30bb\u30b9\u6570\u3092\u53d6\u5f97\n$hourlyCounts = $analyzer->getHourlyAccessCounts();\necho \"\\n\u6642\u9593\u5e2f\u5225\u30a2\u30af\u30bb\u30b9\u6570:\\n\";\nforeach ($hourlyCounts as $hour => $count) {\n echo \"{$hour}\u6642: {$count}\u4ef6\\n\";\n}\n\n\/\/ \u66dc\u65e5\u5225\u30a2\u30af\u30bb\u30b9\u6570\u3092\u53d6\u5f97\n$weekdayCounts = $analyzer->getWeekdayAccessCounts();\necho \"\\n\u66dc\u65e5\u5225\u30a2\u30af\u30bb\u30b9\u6570:\\n\";\nforeach ($weekdayCounts as $weekday => $count) {\n echo \"{$weekday}\u66dc\u65e5: {$count}\u4ef6\\n\";\n}\n\n\/\/ \u30a8\u30f3\u30c9\u30dd\u30a4\u30f3\u30c8\u5225\u30a8\u30e9\u30fc\u7387\u3092\u53d6\u5f97\n$errorRates = $analyzer->getEndpointErrorRates();\necho \"\\n\u30a8\u30f3\u30c9\u30dd\u30a4\u30f3\u30c8\u5225\u30a8\u30e9\u30fc\u7387:\\n\";\nforeach ($errorRates as $endpoint => $rate) {\n echo \"{$endpoint}: {$rate}%\\n\";\n}\n\n\/\/ \u671f\u9593\u5185\u306e\u5e73\u5747\u30ec\u30b9\u30dd\u30f3\u30b9\u6642\u9593\u3092\u53d6\u5f97\n$avgTime = $analyzer->getAverageResponseTime('2023-12-01', '2023-12-31');\necho \"\\n2023\u5e7412\u6708\u306e\u5e73\u5747\u30ec\u30b9\u30dd\u30f3\u30b9\u6642\u9593: {$avgTime}\u79d2\\n\";\n\n\/\/ \u65e5\u5225\u30ec\u30dd\u30fc\u30c8\u3092CSV\u51fa\u529b\n$analyzer->exportDailyReportToCsv('daily_report.csv');\necho \"\\n\u65e5\u5225\u30ec\u30dd\u30fc\u30c8\u3092 daily_report.csv \u306b\u51fa\u529b\u3057\u307e\u3057\u305f\\n\";\n<\/pre>\n\n\n\n\n
\u65e5\u4ed8\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u306b\u95a2\u3059\u308b\u3088\u304f\u3042\u308b\u8cea\u554f\u3068\u56de\u7b54<\/h2>\n\n\n\n
\u300c\u5348\u524d\/\u5348\u5f8c\u300d\u306e\u8868\u793a\u65b9\u6cd5\u306b\u3064\u3044\u3066<\/h3>\n\n\n\n
date()\u95a2\u6570\u3067\u306e\u300c\u5348\u524d\/\u5348\u5f8c\u300d\u8868\u793a<\/h4>\n\n\n\n
\/\/ \u82f1\u8a9e\u306e\u300cam\/pm\u300d\u3092\u8868\u793a\necho date('a'); \/\/ 'am' \u307e\u305f\u306f 'pm'\uff08\u5c0f\u6587\u5b57\uff09\necho date('A'); \/\/ 'AM' \u307e\u305f\u306f 'PM'\uff08\u5927\u6587\u5b57\uff09\n\n\/\/ \u65e5\u672c\u8a9e\u306e\u300c\u5348\u524d\/\u5348\u5f8c\u300d\u306b\u5909\u63db\nfunction formatJapaneseAmPm($time = 'now') {\n if (is_string($time)) {\n $dateTime = new DateTime($time);\n } elseif ($time instanceof DateTime) {\n $dateTime = $time;\n } else {\n $dateTime = new DateTime();\n }\n \n $hour = (int)$dateTime->format('G'); \/\/ 0-23\u306e\u6642\u9593\n $ampm = $hour < 12 ? '\u5348\u524d' : '\u5348\u5f8c';\n \n return $ampm;\n}\n\necho formatJapaneseAmPm('14:30:00'); \/\/ '\u5348\u5f8c'\n<\/pre>\n\n\n\nstrftime()\u306b\u3088\u308b\u300c\u5348\u524d\/\u5348\u5f8c\u300d\u8868\u793a\uff08PHP 8.1\u4ee5\u524d\uff09<\/h4>\n\n\n\n
\/\/ PHP\u306e\u53e4\u3044\u30d0\u30fc\u30b8\u30e7\u30f3\u3067\u306fstrftime()\u3092\u4f7f\u7528\u3067\u304d\u307e\u3057\u305f\uff08PHP 8.1\u3067\u975e\u63a8\u5968\uff09\nsetlocale(LC_TIME, 'ja_JP.UTF-8');\necho strftime('%p', strtotime('14:30:00')); \/\/ \u74b0\u5883\u306b\u3088\u3063\u3066\u300c\u5348\u5f8c\u300d\u3068\u8868\u793a\u3055\u308c\u308b\u5834\u5408\u304c\u3042\u308b\n<\/pre>\n\n\n\nIntlDateFormatter\u306b\u3088\u308b\u300c\u5348\u524d\/\u5348\u5f8c\u300d\u8868\u793a<\/h4>\n\n\n\n
function getJapaneseTimeWithAmPm($time = 'now') {\n $formatter = new IntlDateFormatter(\n 'ja_JP',\n IntlDateFormatter::NONE, \/\/ \u65e5\u4ed8\u30b9\u30bf\u30a4\u30eb\u306a\u3057\n IntlDateFormatter::SHORT, \/\/ \u77ed\u3044\u6642\u523b\u30b9\u30bf\u30a4\u30eb\n null,\n null,\n 'a h\u6642mm\u5206' \/\/ \u30ab\u30b9\u30bf\u30e0\u30d1\u30bf\u30fc\u30f3\n );\n \n if (is_string($time) && !is_numeric($time)) {\n $dateTime = new DateTime($time);\n } elseif (is_numeric($time)) {\n $dateTime = (new DateTime())->setTimestamp($time);\n } elseif ($time instanceof DateTime) {\n $dateTime = $time;\n } else {\n $dateTime = new DateTime();\n }\n \n return $formatter->format($dateTime);\n}\n\necho getJapaneseTimeWithAmPm('14:30:00'); \/\/ '\u5348\u5f8c 2\u664230\u5206'\n<\/pre>\n\n\n\n\u30ab\u30b9\u30bf\u30e0\u914d\u5217\u306b\u3088\u308b\u300c\u5348\u524d\/\u5348\u5f8c\u300d\u8868\u793a<\/h4>\n\n\n\n
function formatTimeWithJapaneseAmPm($time = 'now') {\n if (is_string($time) && !is_numeric($time)) {\n $dateTime = new DateTime($time);\n } elseif (is_numeric($time)) {\n $dateTime = (new DateTime())->setTimestamp($time);\n } elseif ($time instanceof DateTime) {\n $dateTime = $time;\n } else {\n $dateTime = new DateTime();\n }\n \n $hour24 = (int)$dateTime->format('G'); \/\/ 0-23\n $hour12 = (int)$dateTime->format('g'); \/\/ 1-12\n $minute = $dateTime->format('i');\n $second = $dateTime->format('s');\n \n $ampm = $hour24 < 12 ? '\u5348\u524d' : '\u5348\u5f8c';\n \n return \"{$ampm} {$hour12}\u6642{$minute}\u5206{$second}\u79d2\";\n}\n\necho formatTimeWithJapaneseAmPm('09:45:30'); \/\/ '\u5348\u524d 9\u664245\u520630\u79d2'\necho formatTimeWithJapaneseAmPm('21:45:30'); \/\/ '\u5348\u5f8c 9\u664245\u520630\u79d2'\n<\/pre>\n\n\n\n\u300c\u5348\u524d\/\u5348\u5f8c\u300d\u8868\u793a\u306b\u95a2\u3059\u308b\u3088\u304f\u3042\u308b\u7591\u554f<\/h4>\n\n\n\n
\/\/ \u6df1\u591c0\u6642\necho formatTimeWithJapaneseAmPm('00:00:00'); \/\/ '\u5348\u524d 12\u664200\u520600\u79d2'\n<\/pre>\n\n\n\n\/\/ \u6b63\u5348\necho formatTimeWithJapaneseAmPm('12:00:00'); \/\/ '\u5348\u5f8c 12\u664200\u520600\u79d2'\n<\/pre>\n\n\n\n\u548c\u66a6\u3068\u897f\u66a6\u306e\u76f8\u4e92\u5909\u63db\u30c6\u30af\u30cb\u30c3\u30af<\/h3>\n\n\n\n
\u897f\u66a6\u304b\u3089\u548c\u66a6\u3078\u306e\u5909\u63db<\/h4>\n\n\n\n
\/**\n * \u897f\u66a6\u304b\u3089\u548c\u66a6\u306b\u5909\u63db\u3059\u308b\n * \n * @param string|int|DateTime $date \u65e5\u4ed8\n * @param bool $useGengo \u5143\u53f7\u3092\u4f7f\u7528\u3059\u308b\u304b\uff08false=R5\u5e74\u3001true=\u4ee4\u548c5\u5e74\uff09\n * @param bool $useGannen \u5143\u5e74\u3092\u300c\u5143\u5e74\u300d\u3068\u8868\u793a\u3059\u308b\u304b\uff08true=\u5143\u5e74\u3001false=1\u5e74\uff09\n * @return string \u548c\u66a6\n *\/\nfunction convertToJapaneseEra($date = 'now', bool $useGengo = true, bool $useGannen = true): string {\n \/\/ DateTime\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306b\u5909\u63db\n if (is_string($date) && !is_numeric($date)) {\n $dateTime = new DateTime($date);\n } elseif (is_numeric($date)) {\n $dateTime = (new DateTime())->setTimestamp($date);\n } elseif ($date instanceof DateTime) {\n $dateTime = $date;\n } else {\n $dateTime = new DateTime();\n }\n \n $year = (int)$dateTime->format('Y');\n $month = (int)$dateTime->format('m');\n $day = (int)$dateTime->format('d');\n \n \/\/ \u5143\u53f7\u306e\u5b9a\u7fa9\uff08\u958b\u59cb\u65e5\u4ed8\u3001\u5143\u53f7\u540d\u3001\u7565\u79f0\uff09\n $eras = [\n ['start' => '2019-05-01', 'name' => '\u4ee4\u548c', 'abbr' => 'R'],\n ['start' => '1989-01-08', 'name' => '\u5e73\u6210', 'abbr' => 'H'],\n ['start' => '1926-12-25', 'name' => '\u662d\u548c', 'abbr' => 'S'],\n ['start' => '1912-07-30', 'name' => '\u5927\u6b63', 'abbr' => 'T'],\n ['start' => '1868-01-25', 'name' => '\u660e\u6cbb', 'abbr' => 'M'],\n ];\n \n \/\/ \u65e5\u4ed8\u3092\u6bd4\u8f03\u3057\u3066\u9069\u5207\u306a\u5143\u53f7\u3092\u6c7a\u5b9a\n $targetDate = $dateTime->format('Y-m-d');\n $eraName = '';\n $eraAbbr = '';\n $eraYear = 0;\n \n foreach ($eras as $era) {\n if ($targetDate >= $era['start']) {\n $eraName = $era['name'];\n $eraAbbr = $era['abbr'];\n $eraStartDate = new DateTime($era['start']);\n $eraYear = $year - $eraStartDate->format('Y') + 1;\n break;\n }\n }\n \n \/\/ \u5143\u53f7\u304c\u898b\u3064\u304b\u3089\u306a\u3044\u5834\u5408\u306f\u897f\u66a6\u3092\u8fd4\u3059\n if (empty($eraName)) {\n return \"{$year}\u5e74{$month}\u6708{$day}\u65e5\";\n }\n \n \/\/ \u5143\u53f71\u5e74\u3092\u300c\u5143\u5e74\u300d\u3068\u8868\u8a18\u3059\u308b\u304b\u3069\u3046\u304b\n $eraYearStr = ($eraYear === 1 && $useGannen) ? '\u5143' : $eraYear;\n \n \/\/ \u5143\u53f7\u306e\u8868\u8a18\u65b9\u6cd5\uff08\u6f22\u5b57\u307e\u305f\u306f\u7565\u79f0\uff09\n $eraDisplay = $useGengo ? $eraName : $eraAbbr;\n \n return \"{$eraDisplay}{$eraYearStr}\u5e74{$month}\u6708{$day}\u65e5\";\n}\n\n\/\/ \u4f7f\u7528\u4f8b\necho convertToJapaneseEra('2023-05-01'); \/\/ '\u4ee4\u548c5\u5e745\u67081\u65e5'\necho convertToJapaneseEra('2019-05-01', true, true); \/\/ '\u4ee4\u548c\u5143\u5e745\u67081\u65e5'\necho convertToJapaneseEra('2019-05-01', false, true); \/\/ 'R\u5143\u5e745\u67081\u65e5'\necho convertToJapaneseEra('1989-01-07'); \/\/ '\u662d\u548c64\u5e741\u67087\u65e5'\n<\/pre>\n\n\n\n\u548c\u66a6\u304b\u3089\u897f\u66a6\u3078\u306e\u5909\u63db<\/h4>\n\n\n\n
\/**\n * \u548c\u66a6\u304b\u3089\u897f\u66a6\u306b\u5909\u63db\u3059\u308b\n * \n * @param string $japaneseDate \u548c\u66a6\u65e5\u4ed8\uff08\u4f8b: '\u4ee4\u548c5\u5e745\u67081\u65e5', 'R5\u5e745\u67081\u65e5'\uff09\n * @return DateTime|null \u5909\u63db\u5f8c\u306eDateTime\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3001\u5909\u63db\u5931\u6557\u6642\u306fnull\n *\/\nfunction convertFromJapaneseEra(string $japaneseDate): ?DateTime {\n \/\/ \u5143\u53f7\u306e\u30d1\u30bf\u30fc\u30f3\u3092\u5b9a\u7fa9\n $patterns = [\n '\u4ee4\u548c|\u4ee4|R' => ['start' => '2019-05-01', 'end' => null],\n '\u5e73\u6210|\u5e73|H' => ['start' => '1989-01-08', 'end' => '2019-04-30'],\n '\u662d\u548c|\u662d|S' => ['start' => '1926-12-25', 'end' => '1989-01-07'],\n '\u5927\u6b63|\u5927|T' => ['start' => '1912-07-30', 'end' => '1926-12-24'],\n '\u660e\u6cbb|\u660e|M' => ['start' => '1868-01-25', 'end' => '1912-07-29'],\n ];\n \n \/\/ \u548c\u66a6\u306e\u30d1\u30bf\u30fc\u30f3\u306b\u30de\u30c3\u30c1\u3059\u308b\u304b\u78ba\u8a8d\n $matched = false;\n $year = 0;\n $month = 0;\n $day = 0;\n $eraStart = '';\n \n foreach ($patterns as $eraPattern => $dates) {\n \/\/ \u300c\u4ee4\u548c5\u5e745\u67081\u65e5\u300d\u3084\u300cR5\u5e745\u67081\u65e5\u300d\u306e\u3088\u3046\u306a\u30d1\u30bf\u30fc\u30f3\u306b\u30de\u30c3\u30c1\n $pattern = \"\/({$eraPattern})([\u5143\\d]+|\u5143)\u5e74(\\d+)\u6708(\\d+)\u65e5\/u\";\n if (preg_match($pattern, $japaneseDate, $matches)) {\n $eraYear = $matches[2] === '\u5143' ? 1 : (int)$matches[2];\n $month = (int)$matches[3];\n $day = (int)$matches[4];\n $eraStart = $dates['start'];\n $matched = true;\n break;\n }\n }\n \n if (!$matched) {\n return null; \/\/ \u30de\u30c3\u30c1\u3057\u306a\u304b\u3063\u305f\u5834\u5408\n }\n \n \/\/ \u5143\u53f7\u306e\u958b\u59cb\u5e74\u3092\u53d6\u5f97\n $eraStartYear = (int)(new DateTime($eraStart))->format('Y');\n \n \/\/ \u897f\u66a6\u5e74\u3092\u8a08\u7b97\n $year = $eraStartYear + $eraYear - 1;\n \n \/\/ DateTime\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u751f\u6210\n try {\n return new DateTime(\"{$year}-{$month}-{$day}\");\n } catch (Exception $e) {\n return null; \/\/ \u7121\u52b9\u306a\u65e5\u4ed8\u306e\u5834\u5408\n }\n}\n\n\/\/ \u4f7f\u7528\u4f8b\n$dateTime = convertFromJapaneseEra('\u4ee4\u548c5\u5e745\u67081\u65e5');\nif ($dateTime) {\n echo $dateTime->format('Y-m-d'); \/\/ '2023-05-01'\n}\n\n$dateTime = convertFromJapaneseEra('R\u5143\u5e745\u67081\u65e5');\nif ($dateTime) {\n echo $dateTime->format('Y-m-d'); \/\/ '2019-05-01'\n}\n\n$dateTime = convertFromJapaneseEra('\u662d\u548c64\u5e741\u67087\u65e5');\nif ($dateTime) {\n echo $dateTime->format('Y-m-d'); \/\/ '1989-01-07'\n}\n<\/pre>\n\n\n\nIntlDateFormatter\u3092\u4f7f\u7528\u3057\u305f\u548c\u66a6\u8868\u793a\uff08PHP 8.0\u4ee5\u964d\uff09<\/h4>\n\n\n\n
\/**\n * IntlDateFormatter\u3092\u4f7f\u7528\u3057\u3066\u548c\u66a6\u8868\u793a\u3059\u308b\uff08PHP 8.0\u4ee5\u964d\uff09\n * \n * @param string|int|DateTime $date \u65e5\u4ed8\n * @return string \u548c\u66a6\n *\/\nfunction formatJapaneseCalendar($date = 'now'): string {\n \/\/ DateTime\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306b\u7d71\u4e00\n if (is_string($date) && !is_numeric($date)) {\n $dateTime = new DateTime($date);\n } elseif (is_numeric($date)) {\n $dateTime = (new DateTime())->setTimestamp($date);\n } elseif ($date instanceof DateTime) {\n $dateTime = $date;\n } else {\n $dateTime = new DateTime();\n }\n \n \/\/ IntlDateFormatter\u3092\u4f7f\u7528\n $formatter = new IntlDateFormatter(\n 'ja_JP@calendar=japanese',\n IntlDateFormatter::LONG,\n IntlDateFormatter::NONE,\n 'Asia\/Tokyo',\n IntlDateFormatter::TRADITIONAL\n );\n \n return $formatter->format($dateTime);\n}\n\n\/\/ \u4f7f\u7528\u4f8b\uff08PHP 8.0\u4ee5\u964d\uff09\necho formatJapaneseCalendar('2023-05-01'); \/\/ '\u4ee4\u548c5\u5e745\u67081\u65e5'\n<\/pre>\n\n\n\n\u548c\u66a6\u8868\u793a\u306b\u95a2\u3059\u308b\u3088\u304f\u3042\u308b\u7591\u554f<\/h4>\n\n\n\n
$date = '1800-01-01';\n$japaneseDate = convertToJapaneseEra($date);\necho $japaneseDate; \/\/ '1800\u5e741\u67081\u65e5'\uff08\u548c\u66a6\u306b\u5909\u63db\u3055\u308c\u305a\u897f\u66a6\u306e\u307e\u307e\uff09\n<\/pre>\n\n\n\n
\u307e\u3068\u3081\uff1aPHP\u65e5\u4ed8\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/h2>\n\n\n\n
\u30b7\u30fc\u30f3\u5225\u304a\u3059\u3059\u3081\u65e5\u4ed8\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u8a2d\u5b9a\u4e00\u89a7<\/h3>\n\n\n\n
\u7528\u9014<\/th> \u63a8\u5968\u30d5\u30a9\u30fc\u30de\u30c3\u30c8<\/th> \u30b3\u30fc\u30c9\u4f8b<\/th> \u51fa\u529b\u4f8b<\/th><\/tr><\/thead> \u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u4fdd\u5b58\u7528<\/td> Y-m-d H:i:s<\/code><\/td>$date->format('Y-m-d H:i:s')<\/code><\/td>2023-12-31 23:59:59<\/td><\/tr> JSON API\u7528<\/td> c<\/code>\uff08ISO 8601\uff09<\/td>$date->format('c')<\/code><\/td>2023-12-31T23:59:59+09:00<\/td><\/tr> \u65e5\u672c\u8a9e\u8868\u793a\uff08\u30d5\u30a9\u30fc\u30de\u30eb\uff09<\/td> Y\u5e74m\u6708d\u65e5\uff08\u66dc\u65e5\uff09<\/code><\/td>\u203b\u30ab\u30b9\u30bf\u30e0\u95a2\u6570<\/td> 2023\u5e7412\u670831\u65e5\uff08\u65e5\uff09<\/td><\/tr> \u65e5\u672c\u8a9e\u8868\u793a\uff08\u7c21\u6613\uff09<\/td> Y\/m\/d<\/code><\/td>$date->format('Y\/m\/d')<\/code><\/td>2023\/12\/31<\/td><\/tr> \u548c\u66a6\u8868\u793a<\/td> \u203b\u30ab\u30b9\u30bf\u30e0\u95a2\u6570<\/td> convertToJapaneseEra($date)<\/code><\/td>\u4ee4\u548c5\u5e7412\u670831\u65e5<\/td><\/tr> \u7ba1\u7406\u753b\u9762\u4e00\u89a7\u8868\u793a<\/td> Y-m-d<\/code><\/td>$date->format('Y-m-d')<\/code><\/td>2023-12-31<\/td><\/tr>