PHP\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306b\u304a\u3044\u3066\u3001\u6bd4\u8f03\u6f14\u7b97\u5b50\u306f\u6761\u4ef6\u5206\u5c90\u3084\u30c7\u30fc\u30bf\u691c\u8a3c\u306e\u6839\u5e79\u3092\u62c5\u3046\u91cd\u8981\u306a\u8981\u7d20\u3067\u3059\u3002\u3057\u304b\u3057\u3001\u305d\u306e\u6319\u52d5\u3092\u6b63\u78ba\u306b\u7406\u89e3\u3057\u3066\u3044\u306a\u3044\u3068\u3001\u4e88\u671f\u305b\u306c\u30d0\u30b0\u3084\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u8106\u5f31\u6027\u306e\u539f\u56e0\u3068\u306a\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002\u672c\u8a18\u4e8b\u3067\u306f\u3001PHP\u306e9\u3064\u306e\u6bd4\u8f03\u6f14\u7b97\u5b50\u306e\u57fa\u672c\u304b\u3089\u5fdc\u7528\u307e\u3067\u3001\u5b9f\u8df5\u7684\u306a\u4f7f\u3044\u65b9\u3068\u30d0\u30b0\u3092\u9632\u3050\u305f\u3081\u306e\u30c6\u30af\u30cb\u30c3\u30af\u3092\u5fb9\u5e95\u89e3\u8aac\u3057\u307e\u3059\u3002\u521d\u5fc3\u8005\u304b\u3089\u4e2d\u7d1a\u8005\u306ePHP\u30a8\u30f3\u30b8\u30cb\u30a2\u306e\u65b9\u3005\u306b\u3068\u3063\u3066\u3001\u65e5\u3005\u306e\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u306e\u8cea\u3092\u9ad8\u3081\u308b\u5f37\u529b\u306a\u77e5\u8b58\u3068\u306a\u308b\u3067\u3057\u3087\u3046\u3002<\/p>\n\n\n\n
\u76ee\u6b21 <\/p>\n
\u6bd4\u8f03\u6f14\u7b97\u5b50\u306f\u3001\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306e\u57fa\u790e\u4e2d\u306e\u57fa\u790e\u3068\u3082\u8a00\u3048\u308b\u91cd\u8981\u306a\u8981\u7d20\u3067\u3059\u3002PHP\u306b\u304a\u3044\u3066\u3001\u3053\u308c\u3089\u306e\u6f14\u7b97\u5b50\u306f\u4e8c\u3064\u306e\u5024\u3092\u6bd4\u8f03\u3057\u3001\u305d\u306e\u7d50\u679c\u3068\u3057\u3066\u771f\uff08true\uff09\u307e\u305f\u306f\u507d\uff08false\uff09\u306e\u30d6\u30fc\u30eb\u5024\u3092\u8fd4\u3057\u307e\u3059\u3002\u3053\u306e\u5358\u7d14\u306a\u6a5f\u80fd\u304c\u3001\u6761\u4ef6\u5206\u5c90\u3084\u30c7\u30fc\u30bf\u691c\u8a3c\u306a\u3069\u3001\u3042\u3089\u3086\u308b\u30d7\u30ed\u30b0\u30e9\u30e0\u30ed\u30b8\u30c3\u30af\u306e\u57fa\u76e4\u3068\u306a\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n
\u6bd4\u8f03\u6f14\u7b97\u5b50\u306f\u30d7\u30ed\u30b0\u30e9\u30e0\u306e\u300c\u5206\u5c90\u70b9\u300d\u3092\u4f5c\u308a\u51fa\u3057\u307e\u3059\u3002\u4f8b\u3048\u3070\u3001\u30e6\u30fc\u30b6\u30fc\u304c18\u6b73\u4ee5\u4e0a\u304b\u3069\u3046\u304b\u3092\u78ba\u8a8d\u3059\u308b\u6761\u4ef6\u5206\u5c90\u306f\u6b21\u306e\u3088\u3046\u306b\u66f8\u3051\u307e\u3059\uff1a<\/p>\n\n\n\n
\/\/ \u5e74\u9f62\u304c18\u4ee5\u4e0a\u304b\u3069\u3046\u304b\u3092\u30c1\u30a7\u30c3\u30af\n$age = 25;\nif ($age >= 18) {\n echo \"\u6210\u4eba\u3067\u3059\"; \/\/ \u6761\u4ef6\u304c\u771f\u306e\u5834\u5408\u306e\u51e6\u7406\n} else {\n echo \"\u672a\u6210\u5e74\u3067\u3059\"; \/\/ \u6761\u4ef6\u304c\u507d\u306e\u5834\u5408\u306e\u51e6\u7406\n}\n<\/pre>\n\n\n\n\u3053\u306e\u3088\u3046\u306b\u3001\u6bd4\u8f03\u6f14\u7b97\u5b50\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u30d7\u30ed\u30b0\u30e9\u30e0\u306e\u91cd\u8981\u306a\u90e8\u5206\u3067\u6d3b\u7528\u3055\u308c\u3066\u3044\u307e\u3059\uff1a<\/p>\n\n\n\n
\u9069\u5207\u306a\u6bd4\u8f03\u6f14\u7b97\u5b50\u306e\u9078\u629e\u3068\u4f7f\u7528\u306f\u3001\u30d7\u30ed\u30b0\u30e9\u30e0\u306e\u6b63\u78ba\u6027\u3068\u5805\u7262\u6027\u3092\u5de6\u53f3\u3059\u308b\u8981\u7d20\u306a\u306e\u3067\u3059\u3002<\/p>\n\n\n\n
PHP\u306f\u300c\u5f31\u3044\u578b\u4ed8\u3051\u8a00\u8a9e\u300d\u3067\u3042\u308a\u3001\u4ed6\u306e\u591a\u304f\u306e\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u8a00\u8a9e\u3068\u6bd4\u3079\u3066\u578b\u306e\u6271\u3044\u304c\u67d4\u8edf\u3067\u3059\u3002\u3053\u306e\u7279\u6027\u306f\u958b\u767a\u306e\u8fc5\u901f\u6027\u3092\u3082\u305f\u3089\u3059\u4e00\u65b9\u3067\u3001\u6bd4\u8f03\u6f14\u7b97\u5b50\u306e\u6319\u52d5\u306b\u95a2\u3057\u3066\u7279\u6709\u306e\u6ce8\u610f\u70b9\u3092\u751f\u307f\u51fa\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n
PHP\u3067\u306f\u6bd4\u8f03\u6642\u306b\u300c\u578b\u5909\u63db\uff08Type Juggling\uff09\u300d\u3068\u547c\u3070\u308c\u308b\u81ea\u52d5\u7684\u306a\u578b\u306e\u5909\u63db\u304c\u884c\u308f\u308c\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u308c\u304c\u4e88\u671f\u305b\u306c\u52d5\u4f5c\u306e\u539f\u56e0\u3068\u306a\u308b\u3053\u3068\u304c\u5c11\u306a\u304f\u3042\u308a\u307e\u305b\u3093\u3002\u4f8b\u3048\u3070\uff1a<\/p>\n\n\n\n
\/\/ \u4e00\u898b\u3059\u308b\u3068\u7570\u306a\u308b\u5024\u3060\u304c\u3001PHP\u3067\u306f\u7b49\u3057\u3044\u3068\u307f\u306a\u3055\u308c\u308b\nvar_dump(\"0\" == 0); \/\/ bool(true) \u2190 \u6587\u5b57\u5217\u304c\u6570\u5024\u306b\u5909\u63db\u3055\u308c\u308b\nvar_dump(0 == \"\"); \/\/ bool(true) \u2190 \u7a7a\u6587\u5b57\u5217\u306f0\u306b\u5909\u63db\u3055\u308c\u308b\nvar_dump(0 == false); \/\/ bool(true) \u2190 false\u306f0\u306b\u5909\u63db\u3055\u308c\u308b\n\n\/\/ \u5bfe\u7167\u7684\u306b\u3001\u53b3\u5bc6\u6bd4\u8f03\u3067\u306f\u578b\u3082\u542b\u3081\u3066\u6bd4\u8f03\nvar_dump(\"0\" === 0); \/\/ bool(false)\nvar_dump(0 === \"\"); \/\/ bool(false)\nvar_dump(0 === false); \/\/ bool(false)\n<\/pre>\n\n\n\nJava\u3001C#\u3001TypeScript\u306a\u3069\u306e\u5f37\u3044\u578b\u4ed8\u3051\u8a00\u8a9e\u3067\u306f\u3001\u3053\u306e\u3088\u3046\u306a\u81ea\u52d5\u5909\u63db\u306f\u884c\u308f\u308c\u306a\u3044\u304b\u3001\u3088\u308a\u53b3\u683c\u306b\u30eb\u30fc\u30eb\u5316\u3055\u308c\u3066\u3044\u307e\u3059\u3002PHP\u3067\u306f\u3053\u306e\u67d4\u8edf\u6027\u304c\u6642\u306b\u6df7\u4e71\u3092\u62db\u304f\u305f\u3081\u3001\u7279\u306b==\uff08\u7b49\u4fa1\uff09\u3068===\uff08\u53b3\u5bc6\u7b49\u4fa1\uff09\u306e\u4f7f\u3044\u5206\u3051\u304c\u91cd\u8981\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n
\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u8981\u4ef6\u306e\u9ad8\u3044\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3067\u306f\u3001\u3053\u306e\u578b\u5909\u63db\u304c\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u8106\u5f31\u6027\u306b\u3064\u306a\u304c\u308b\u53ef\u80fd\u6027\u3082\u3042\u308a\u3001PHP\u30d7\u30ed\u30b0\u30e9\u30de\u30fc\u306f\u6bd4\u8f03\u6f14\u7b97\u5b50\u306e\u7279\u6027\u3092\u6df1\u304f\u7406\u89e3\u3059\u308b\u3053\u3068\u304c\u6c42\u3081\u3089\u308c\u308b\u306e\u3067\u3059\u3002<\/p>\n\n\n\n
PHP\u3067\u4f7f\u7528\u3067\u304d\u308b9\u3064\u306e\u6bd4\u8f03\u6f14\u7b97\u5b50\u3068\u57fa\u672c\u7684\u306a\u4f7f\u3044\u65b9<\/h2>\n\n\n\n
PHP\u306b\u306f9\u3064\u306e\u6bd4\u8f03\u6f14\u7b97\u5b50\u304c\u3042\u308a\u3001\u305d\u308c\u305e\u308c\u304c\u7279\u5b9a\u306e\u30b7\u30ca\u30ea\u30aa\u306b\u9069\u3057\u3066\u3044\u307e\u3059\u3002\u3053\u308c\u3089\u306e\u6f14\u7b97\u5b50\u3092\u6b63\u3057\u304f\u7406\u89e3\u3057\u4f7f\u3044\u5206\u3051\u308b\u3053\u3068\u306f\u3001\u30d0\u30b0\u306e\u5c11\u306a\u3044\u5805\u7262\u306a\u30b3\u30fc\u30c9\u3092\u66f8\u304f\u4e0a\u3067\u4e0d\u53ef\u6b20\u3067\u3059\u3002<\/p>\n\n\n
\n
\u6f14\u7b97\u5b50<\/th> \u540d\u79f0<\/th> \u8aac\u660e<\/th><\/tr><\/thead> ==<\/td> \u7b49\u4fa1<\/td> \u5024\u304c\u7b49\u3057\u3044\uff08\u578b\u5909\u63db\u3042\u308a\uff09<\/td><\/tr> ===<\/td> \u53b3\u5bc6\u7b49\u4fa1<\/td> \u5024\u3068\u578b\u304c\u4e21\u65b9\u3068\u3082\u7b49\u3057\u3044<\/td><\/tr> !=<\/td> \u4e0d\u7b49\u4fa1<\/td> \u5024\u304c\u7b49\u3057\u304f\u306a\u3044\uff08\u578b\u5909\u63db\u3042\u308a\uff09<\/td><\/tr> !==<\/td> \u53b3\u5bc6\u4e0d\u7b49\u4fa1<\/td> \u5024\u307e\u305f\u306f\u578b\u304c\u7b49\u3057\u304f\u306a\u3044<\/td><\/tr> <><\/td> \u4e0d\u7b49\u4fa1<\/td> !=\u3068\u540c\u3058\uff08\u578b\u5909\u63db\u3042\u308a\uff09<\/td><\/tr> <<\/td> \u3088\u308a\u5c0f\u3055\u3044<\/td> \u5de6\u8fba\u304c\u53f3\u8fba\u3088\u308a\u5c0f\u3055\u3044<\/td><\/tr> ><\/td> \u3088\u308a\u5927\u304d\u3044<\/td> \u5de6\u8fba\u304c\u53f3\u8fba\u3088\u308a\u5927\u304d\u3044<\/td><\/tr> <=<\/td> \u4ee5\u4e0b<\/td> \u5de6\u8fba\u304c\u53f3\u8fba\u4ee5\u4e0b<\/td><\/tr> >=<\/td> \u4ee5\u4e0a<\/td> \u5de6\u8fba\u304c\u53f3\u8fba\u4ee5\u4e0a<\/td><\/tr> <=><\/td> \u5b87\u5b99\u8239<\/td> \u6bd4\u8f03\u7d50\u679c\u3092-1, 0, 1\u3067\u8fd4\u3059\uff08PHP7\u4ee5\u964d\uff09<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div>\n\n\n \u305d\u308c\u3067\u306f\u3001\u5404\u6f14\u7b97\u5b50\u306e\u7279\u5fb4\u3068\u4f7f\u3044\u65b9\u3092\u8a73\u3057\u304f\u898b\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n
\u7b49\u4fa1\u6f14\u7b97\u5b50\uff08==\uff09\u3068\u53b3\u5bc6\u7b49\u4fa1\u6f14\u7b97\u5b50\uff08===\uff09\u306e\u9055\u3044\u3068\u4f7f\u3044\u5206\u3051<\/h3>\n\n\n\n
\u7b49\u4fa1\u6f14\u7b97\u5b50\uff08==\uff09\u3068\u53b3\u5bc6\u7b49\u4fa1\u6f14\u7b97\u5b50\uff08===\uff09\u306e\u6700\u5927\u306e\u9055\u3044\u306f\u3001\u578b\u5909\u63db\u306e\u6709\u7121\u3067\u3059\u3002<\/p>\n\n\n\n
\/\/ \u7b49\u4fa1\u6f14\u7b97\u5b50\uff08==\uff09\u306f\u5024\u3092\u6bd4\u8f03\u3057\u3001\u5fc5\u8981\u306b\u5fdc\u3058\u3066\u578b\u5909\u63db\u3092\u884c\u3046\nvar_dump(123 == \"123\"); \/\/ bool(true) - \u6587\u5b57\u5217\u304c\u6570\u5024\u306b\u5909\u63db\u3055\u308c\u308b\nvar_dump(0 == \"\"); \/\/ bool(true) - \u7a7a\u6587\u5b57\u5217\u306f0\u306b\u5909\u63db\u3055\u308c\u308b\nvar_dump(null == 0); \/\/ bool(true) - null\u306f0\u306b\u5909\u63db\u3055\u308c\u308b\n\n\/\/ \u53b3\u5bc6\u7b49\u4fa1\u6f14\u7b97\u5b50\uff08===\uff09\u306f\u5024\u3068\u578b\u306e\u4e21\u65b9\u3092\u6bd4\u8f03\u3059\u308b\nvar_dump(123 === \"123\"); \/\/ bool(false) - \u578b\u304c\u7570\u306a\u308b\nvar_dump(0 === \"\"); \/\/ bool(false) - \u578b\u304c\u7570\u306a\u308b\nvar_dump(null === 0); \/\/ bool(false) - \u578b\u304c\u7570\u306a\u308b\n<\/pre>\n\n\n\n\u4e00\u822c\u7684\u306b\u3001\u3088\u308a\u4e88\u6e2c\u53ef\u80fd\u306a\u52d5\u4f5c\u3092\u5f97\u308b\u305f\u3081\u306b\u306f\u53b3\u5bc6\u7b49\u4fa1\u6f14\u7b97\u5b50\uff08===\uff09\u306e\u4f7f\u7528\u304c\u63a8\u5968\u3055\u308c\u307e\u3059\u3002\u7279\u306b\u30e6\u30fc\u30b6\u30fc\u5165\u529b\u306e\u691c\u8a3c\u3084\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u306b\u95a2\u308f\u308b\u6bd4\u8f03\u3067\u306f\u3001\u610f\u56f3\u3057\u306a\u3044\u578b\u5909\u63db\u306b\u3088\u308b\u30d0\u30b0\u3084\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u30db\u30fc\u30eb\u3092\u9632\u3050\u305f\u3081\u306b===\u3092\u4f7f\u7528\u3059\u3079\u304d\u3067\u3059\u3002<\/p>\n\n\n\n
\u4e0d\u7b49\u4fa1\u6f14\u7b97\u5b50\uff08!=, <>\uff09\u3068\u53b3\u5bc6\u4e0d\u7b49\u4fa1\u6f14\u7b97\u5b50\uff08!==\uff09\u306e\u9069\u5207\u306a\u9078\u629e<\/h3>\n\n\n\n
\u4e0d\u7b49\u4fa1\u6f14\u7b97\u5b50\u306b\u306f!=\u3068<>\u306e2\u7a2e\u985e\u304c\u3042\u308a\u307e\u3059\u304c\u3001\u6a5f\u80fd\u7684\u306b\u306f\u5168\u304f\u540c\u3058\u3067\u3059\u3002\u3069\u3061\u3089\u3082\u5024\u304c\u7b49\u3057\u304f\u306a\u3044\u304b\u3092\u78ba\u8a8d\u3057\u3001\u578b\u5909\u63db\u304c\u884c\u308f\u308c\u307e\u3059\u3002\u4e00\u65b9\u3001\u53b3\u5bc6\u4e0d\u7b49\u4fa1\u6f14\u7b97\u5b50\uff08!==\uff09\u306f\u5024\u307e\u305f\u306f\u578b\u306e\u3044\u305a\u308c\u304b\u304c\u7570\u306a\u308b\u5834\u5408\u306btrue\u3092\u8fd4\u3057\u307e\u3059\u3002<\/p>\n\n\n\n
\/\/ \u4e0d\u7b49\u4fa1\u6f14\u7b97\u5b50\uff08!=, <>\uff09\u306f\u5024\u3092\u6bd4\u8f03\u3057\u3001\u578b\u5909\u63db\u3092\u884c\u3046\nvar_dump(123 != \"123\"); \/\/ bool(false) - \u5024\u304c\u7b49\u3057\u3044\u3068\u307f\u306a\u3055\u308c\u308b\nvar_dump(0 != \"\"); \/\/ bool(false) - \u5024\u304c\u7b49\u3057\u3044\u3068\u307f\u306a\u3055\u308c\u308b\n\n\/\/ \u53b3\u5bc6\u4e0d\u7b49\u4fa1\u6f14\u7b97\u5b50\uff08!==\uff09\u306f\u5024\u307e\u305f\u306f\u578b\u304c\u7570\u306a\u308c\u3070true\u3092\u8fd4\u3059\nvar_dump(123 !== \"123\"); \/\/ bool(true) - \u578b\u304c\u7570\u306a\u308b\nvar_dump(0 !== \"\"); \/\/ bool(true) - \u578b\u304c\u7570\u306a\u308b\n<\/pre>\n\n\n\n\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u3092\u91cd\u8996\u3059\u308b\u5834\u5408\u3084\u3001\u578b\u306e\u533a\u5225\u304c\u91cd\u8981\u306a\u30b1\u30fc\u30b9\u3067\u306f\u3001\u53b3\u5bc6\u4e0d\u7b49\u4fa1\u6f14\u7b97\u5b50\uff08!==\uff09\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3092\u304a\u52e7\u3081\u3057\u307e\u3059\u3002!=\u3068<>\u306f\u3069\u3061\u3089\u3092\u4f7f\u3046\u304b\u306f\u597d\u307f\u306e\u554f\u984c\u3067\u3059\u304c\u3001\u30b3\u30fc\u30c9\u306e\u4e00\u8cab\u6027\u3092\u4fdd\u3064\u305f\u3081\u306b\u3001\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u5185\u3067\u306f\u7d71\u4e00\u3059\u308b\u3053\u3068\u304c\u671b\u307e\u3057\u3044\u3067\u3057\u3087\u3046\u3002<\/p>\n\n\n\n
\u5927\u5c0f\u6bd4\u8f03\uff08<, >, <=, >=\uff09\u3067\u6c17\u3092\u3064\u3051\u308b\u3079\u304d\u30c7\u30fc\u30bf\u578b\u306e\u6271\u3044<\/h3>\n\n\n\n
\u5927\u5c0f\u6bd4\u8f03\u6f14\u7b97\u5b50\u3092\u4f7f\u7528\u3059\u308b\u969b\u306f\u3001\u7570\u306a\u308b\u30c7\u30fc\u30bf\u578b\u9593\u306e\u6bd4\u8f03\u3067\u4e88\u671f\u305b\u306c\u7d50\u679c\u304c\u751f\u3058\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n
\/\/ \u6570\u5024\u540c\u58eb\u306e\u6bd4\u8f03\u306f\u76f4\u611f\u7684\nvar_dump(5 < 10); \/\/ bool(true)\n\n\/\/ \u6587\u5b57\u5217\u540c\u58eb\u306f\u8f9e\u66f8\u9806\u3067\u6bd4\u8f03\nvar_dump(\"apple\" < \"banana\"); \/\/ bool(true)\nvar_dump(\"10\" < \"2\"); \/\/ bool(true) - \"1\"\u304c\"2\"\u3088\u308a\u5148\n\n\/\/ \u7570\u306a\u308b\u578b\u306e\u6bd4\u8f03\u3067\u306f\u578b\u5909\u63db\u304c\u884c\u308f\u308c\u308b\nvar_dump(\"5\" < 10); \/\/ bool(true) - \"5\"\u304c\u6570\u5024\u306b\u5909\u63db\u3055\u308c\u308b\nvar_dump(\"5a\" < 10); \/\/ bool(true) - \"5a\"\u306f5\u306b\u5909\u63db\u3055\u308c\u308b\nvar_dump(\"a\" < 10); \/\/ bool(false) - \"a\"\u306f0\u306b\u5909\u63db\u3055\u308c\u308b\n<\/pre>\n\n\n\n\u7279\u306b\u6ce8\u610f\u304c\u5fc5\u8981\u306a\u306e\u306f\u3001\u6570\u5024\u5f62\u5f0f\u306e\u6587\u5b57\u5217\u3068\u6570\u5024\u3092\u6bd4\u8f03\u3059\u308b\u5834\u5408\u3067\u3059\u3002PHP\u306f\u6587\u5b57\u5217\u3092\u6570\u5024\u306b\u5909\u63db\u3057\u3088\u3046\u3068\u3057\u307e\u3059\u3002\u6570\u5024\u306b\u5909\u63db\u3067\u304d\u308b\u90e8\u5206\u304c\u3042\u308b\u5834\u5408\u306f\u305d\u306e\u5024\u304c\u4f7f\u7528\u3055\u308c\u3001\u305d\u3046\u3067\u306a\u3044\u5834\u5408\u306f0\u3068\u3057\u3066\u6271\u308f\u308c\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002\u4e00\u8cab\u6027\u306e\u3042\u308b\u6bd4\u8f03\u3092\u884c\u3046\u305f\u3081\u306b\u306f\u3001\u6bd4\u8f03\u524d\u306b\u30c7\u30fc\u30bf\u578b\u3092\u63c3\u3048\u308b\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002<\/p>\n\n\n\n
\u5b87\u5b99\u8239\u6f14\u7b97\u5b50\uff08<=>\uff09\u306e\u7279\u5fb4\u3068\u6d3b\u7528\u30b7\u30fc\u30f3<\/h3>\n\n\n\n
\u5b87\u5b99\u8239\u6f14\u7b97\u5b50\uff08<=>\uff09\u306fPHP7\u3067\u5c0e\u5165\u3055\u308c\u305f\u6bd4\u8f03\u6f14\u7b97\u5b50\u3067\u30012\u3064\u306e\u5f0f\u3092\u6bd4\u8f03\u3057\u3066\u9806\u5e8f\u95a2\u4fc2\u3092\u793a\u3059\u6574\u6570\u5024\u3092\u8fd4\u3057\u307e\u3059\u3002<\/p>\n\n\n\n
\/\/ \u5b87\u5b99\u8239\u6f14\u7b97\u5b50\u306f\u6bd4\u8f03\u7d50\u679c\u3092\u6570\u5024\u3067\u8fd4\u3059\nvar_dump(5 <=> 10); \/\/ int(-1) - \u5de6\u8fba\u304c\u5c0f\u3055\u3044\nvar_dump(10 <=> 10); \/\/ int(0) - \u7b49\u3057\u3044\nvar_dump(15 <=> 10); \/\/ int(1) - \u5de6\u8fba\u304c\u5927\u304d\u3044\n\n\/\/ \u6587\u5b57\u5217\u6bd4\u8f03\u3082\u53ef\u80fd\nvar_dump(\"a\" <=> \"b\"); \/\/ int(-1)\nvar_dump(\"b\" <=> \"b\"); \/\/ int(0)\nvar_dump(\"c\" <=> \"b\"); \/\/ int(1)\n<\/pre>\n\n\n\n\u3053\u306e\u6f14\u7b97\u5b50\u306f\u7279\u306b\u4e26\u3079\u66ff\u3048\u95a2\u6570\uff08usort, uasort, uksort\u306a\u3069\uff09\u3067\u5a01\u529b\u3092\u767a\u63ee\u3057\u307e\u3059\u3002\u5f93\u6765\u306f\u8907\u6570\u306e\u6761\u4ef6\u3067\u4e26\u3079\u66ff\u3048\u308b\u5834\u5408\u3001\u8907\u96d1\u306a\u6bd4\u8f03\u95a2\u6570\u304c\u5fc5\u8981\u3067\u3057\u305f\u304c\u3001\u5b87\u5b99\u8239\u6f14\u7b97\u5b50\u3092\u4f7f\u3046\u3068\u7c21\u6f54\u306b\u8a18\u8ff0\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n
\/\/ \u8907\u6570\u30ad\u30fc\u3067\u306e\u4e26\u3079\u66ff\u3048\u306e\u4f8b\n$users = [\n ['name' => 'Alice', 'age' => 25],\n ['name' => 'Bob', 'age' => 30],\n ['name' => 'Alice', 'age' => 20]\n];\n\n\/\/ \u540d\u524d\u3067\u30bd\u30fc\u30c8\u3057\u3001\u540c\u3058\u540d\u524d\u306a\u3089\u5e74\u9f62\u3067\u4e26\u3079\u66ff\u3048\nusort($users, function($a, $b) {\n \/\/ \u540d\u524d\u3092\u6bd4\u8f03\u3057\u305f\u7d50\u679c\u304c0\uff08\u7b49\u3057\u3044\uff09\u306a\u3089\u5e74\u9f62\u3067\u6bd4\u8f03\n return $a['name'] <=> $b['name'] ?: $a['age'] <=> $b['age'];\n});\n<\/pre>\n\n\n\n\u5b87\u5b99\u8239\u6f14\u7b97\u5b50\u306f\u8907\u96d1\u306a\u6bd4\u8f03\u30ed\u30b8\u30c3\u30af\u3092\u7c21\u6f54\u306b\u8868\u73fe\u3067\u304d\u3001\u30b3\u30fc\u30c9\u306e\u53ef\u8aad\u6027\u3092\u9ad8\u3081\u3066\u304f\u308c\u307e\u3059\u3002<\/p>\n\n\n\n
PHP\u6bd4\u8f03\u6f14\u7b97\u5b50\u3067\u767a\u751f\u3057\u3084\u3059\u3044\u30d0\u30b0\u3068\u305d\u306e\u56de\u907f\u65b9\u6cd5<\/h2>\n\n\n\n
PHP\u306e\u6bd4\u8f03\u6f14\u7b97\u5b50\u306f\u4fbf\u5229\u3067\u3059\u304c\u3001\u305d\u306e\u67d4\u8edf\u6027\u3086\u3048\u306b\u601d\u308f\u306c\u30d0\u30b0\u306e\u6e29\u5e8a\u3068\u306a\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u3053\u3067\u306f\u3001\u983b\u7e41\u306b\u767a\u751f\u3059\u308b\u30d0\u30b0\u30d1\u30bf\u30fc\u30f3\u3068\u305d\u306e\u56de\u907f\u65b9\u6cd5\u3092\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n\n\n\n
\u30eb\u30fc\u30ba\u306a\u6bd4\u8f03\u304c\u3082\u305f\u3089\u3059\u4e88\u671f\u305b\u306c\u52d5\u4f5c\u3068\u305d\u306e\u89e3\u6c7a\u6cd5<\/h3>\n\n\n\n
\u7b49\u4fa1\u6f14\u7b97\u5b50\uff08==\uff09\u3092\u4f7f\u7528\u3059\u308b\u969b\u3001PHP\u306f\u81ea\u52d5\u7684\u306b\u578b\u5909\u63db\u3092\u884c\u3046\u305f\u3081\u3001\u610f\u5916\u306a\u7d50\u679c\u3092\u3082\u305f\u3089\u3059\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n
\/\/ \u76f4\u611f\u306b\u53cd\u3059\u308b\u7b49\u4fa1\u6bd4\u8f03\u306e\u4f8b\nvar_dump(0 == \"0\"); \/\/ bool(true)\nvar_dump(0 == \"\"); \/\/ bool(true)\nvar_dump(\"0\" == false); \/\/ bool(true)\nvar_dump([] == false); \/\/ bool(true)\n<\/pre>\n\n\n\n\u3053\u308c\u3089\u306e\u300c\u9a5a\u304d\u300d\u3092\u907f\u3051\u308b\u305f\u3081\u306e\u6700\u3082\u52b9\u679c\u7684\u306a\u65b9\u6cd5\u306f\u3001\u53b3\u5bc6\u7b49\u4fa1\u6f14\u7b97\u5b50\uff08===\uff09\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u578b\u5909\u63db\u306f\u884c\u308f\u308c\u305a\u3001\u5024\u3068\u578b\u306e\u4e21\u65b9\u304c\u4e00\u81f4\u3059\u308b\u5834\u5408\u306e\u307ftrue\u3092\u8fd4\u3057\u307e\u3059\u3002<\/p>\n\n\n\n
\/\/ \u53b3\u5bc6\u6bd4\u8f03\u3067\u306f\u578b\u3082\u542b\u3081\u3066\u6bd4\u8f03\nvar_dump(0 === \"0\"); \/\/ bool(false)\nvar_dump(0 === \"\"); \/\/ bool(false)\nvar_dump(\"0\" === false); \/\/ bool(false)\nvar_dump([] === false); \/\/ bool(false)\n<\/pre>\n\n\n\nNULL\u3068\u306e\u6bd4\u8f03\u3067\u9665\u308a\u3084\u3059\u3044\u8ad6\u7406\u30a8\u30e9\u30fc\u306e\u9632\u304e\u65b9<\/h3>\n\n\n\n
NULL\u5024\u3068\u306e\u6bd4\u8f03\u306f\u7279\u306b\u6ce8\u610f\u304c\u5fc5\u8981\u3067\u3059\u3002NULL\u306f==\u6f14\u7b97\u5b50\u3092\u4f7f\u3046\u30680\u3001\u7a7a\u6587\u5b57\u5217\u3001false\u306a\u3069\u8907\u6570\u306e\u5024\u3068\u7b49\u3057\u3044\u3068\u307f\u306a\u3055\u308c\u307e\u3059\u3002<\/p>\n\n\n\n
var_dump(null == 0); \/\/ bool(true)\nvar_dump(null == \"\"); \/\/ bool(true)\nvar_dump(null == false); \/\/ bool(true)\n\n\/\/ \u3057\u304b\u3057\u53b3\u5bc6\u6bd4\u8f03\u3067\u306f\u7570\u306a\u308b\nvar_dump(null === 0); \/\/ bool(false)\nvar_dump(null === \"\"); \/\/ bool(false)\nvar_dump(null === false);\/\/ bool(false)\n<\/pre>\n\n\n\n\u5909\u6570\u304cNULL\u304b\u3069\u3046\u304b\u3092\u30c1\u30a7\u30c3\u30af\u3059\u308b\u5834\u5408\u3001\u6bd4\u8f03\u6f14\u7b97\u5b50\u3088\u308a\u3082
is_null()<\/code>\u95a2\u6570\u3084===<\/code>\u6f14\u7b97\u5b50\u3092\u4f7f\u7528\u3059\u308b\u306e\u304c\u5b89\u5168\u3067\u3059\u3002\u307e\u305f\u3001\u5909\u6570\u304c\u8a2d\u5b9a\u3055\u308c\u3066\u3044\u308b\u304b\u3092\u30c1\u30a7\u30c3\u30af\u3059\u308b\u306b\u306fisset()<\/code>\u95a2\u6570\u304c\u9069\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n\/\/ \u63a8\u5968\u3055\u308c\u308bNULL\u30c1\u30a7\u30c3\u30af\u306e\u65b9\u6cd5\n$var = null;\nvar_dump(is_null($var)); \/\/ bool(true)\nvar_dump($var === null); \/\/ bool(true)\nvar_dump(isset($var)); \/\/ bool(false) - \u5909\u6570\u304c\u8a2d\u5b9a\u3055\u308c\u3066\u3044\u306a\u3044\u304b\u3001NULL\u306e\u5834\u5408\n<\/pre>\n\n\n\n\u6587\u5b57\u5217\u3068\u6570\u5024\u306e\u6bd4\u8f03\u3067\u8d77\u3053\u308b\u610f\u5916\u306a\u7d50\u679c\u3068\u5bfe\u7b56<\/h3>\n\n\n\n
\u6587\u5b57\u5217\u3068\u6570\u5024\u3092\u6bd4\u8f03\u3059\u308b\u969b\u3001PHP\u306f\u6587\u8108\u306b\u5fdc\u3058\u3066\u578b\u5909\u63db\u3092\u884c\u3046\u305f\u3081\u3001\u9a5a\u304f\u3079\u304d\u7d50\u679c\u3068\u306a\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n
\/\/ \u6570\u5024\u5f62\u5f0f\u306e\u6587\u5b57\u5217\u306f\u6570\u5024\u306b\u5909\u63db\u3055\u308c\u308b\nvar_dump(\"123\" == 123); \/\/ bool(true)\nvar_dump(\"123abc\" == 123); \/\/ bool(true) - \u6570\u5024\u90e8\u5206\u306e\u307f\u5909\u63db\u3055\u308c\u308b\n\n\/\/ \u6bd4\u8f03\u6f14\u7b97\u5b50\u306e\u30bf\u30a4\u30d7\u306b\u3088\u308a\u7d50\u679c\u304c\u7570\u306a\u308b\nvar_dump(\"10\" < \"2\"); \/\/ bool(true) - \u6587\u5b57\u5217\u3068\u3057\u3066\u8f9e\u66f8\u9806\u6bd4\u8f03\nvar_dump(\"10\" < 2); \/\/ bool(false) - \u6570\u5024\u3068\u3057\u3066\u6bd4\u8f03\n<\/pre>\n\n\n\n\u3053\u306e\u554f\u984c\u3092\u56de\u907f\u3059\u308b\u306b\u306f\u3001\u6bd4\u8f03\u524d\u306b\u660e\u793a\u7684\u306b\u578b\u3092\u63c3\u3048\u308b\u3053\u3068\u3092\u304a\u52e7\u3081\u3057\u307e\u3059\u3002<\/p>\n\n\n\n
\/\/ \u660e\u793a\u7684\u306a\u578b\u5909\u63db\u3092\u884c\u3046\nvar_dump((int)\"123abc\" === 123); \/\/ bool(true) - \u610f\u56f3\u304c\u660e\u78ba\nvar_dump((string)10 < \"2\"); \/\/ bool(true) - \u6587\u5b57\u5217\u6bd4\u8f03\u3092\u660e\u793a\n\n\/\/ \u307e\u305f\u306f\u578b\u3092\u53b3\u5bc6\u306b\u691c\u8a3c\nif (is_numeric($value)) {\n \/\/ \u6570\u5024\u3068\u3057\u3066\u5b89\u5168\u306b\u6bd4\u8f03\u3067\u304d\u308b\n}\n<\/pre>\n\n\n\n\u914d\u5217\u30fb\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u6bd4\u8f03\u306b\u304a\u3051\u308b\u843d\u3068\u3057\u7a74<\/h3>\n\n\n\n
\u914d\u5217\u3084\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u6bd4\u8f03\u3082\u72ec\u7279\u306e\u6319\u52d5\u3092\u793a\u3057\u307e\u3059\u3002\u7b49\u4fa1\u6f14\u7b97\u5b50\uff08==\uff09\u306f\u5185\u5bb9\u3092\u6bd4\u8f03\u3057\u3001\u53b3\u5bc6\u7b49\u4fa1\u6f14\u7b97\u5b50\uff08===\uff09\u306f\u540c\u4e00\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u304b\u3069\u3046\u304b\u3092\u30c1\u30a7\u30c3\u30af\u3057\u307e\u3059\u3002<\/p>\n\n\n\n
\/\/ \u914d\u5217\u306e\u6bd4\u8f03\n$a1 = [1, 2, 3];\n$a2 = [1, 2, 3];\n\nvar_dump($a1 == $a2); \/\/ bool(true) - \u5185\u5bb9\u304c\u540c\u3058\nvar_dump($a1 === $a2); \/\/ bool(false) - \u5225\u3005\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\n\n\/\/ \u30ad\u30fc\u306e\u9806\u5e8f\u3082\u91cd\u8981\n$b1 = ['a' => 1, 'b' => 2];\n$b2 = ['b' => 2, 'a' => 1];\n\nvar_dump($b1 == $b2); \/\/ bool(true) - \u30ad\u30fc\u3068\u5024\u304c\u4e00\u81f4\n<\/pre>\n\n\n\n\u8907\u96d1\u306a\u914d\u5217\u3084\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u6bd4\u8f03\u3067\u306f\u3001\u5358\u7d14\u306a\u6bd4\u8f03\u6f14\u7b97\u5b50\u3067\u306f\u306a\u304f\u5c02\u7528\u306e\u95a2\u6570\u3092\u4f7f\u7528\u3059\u308b\u3068\u3088\u308a\u5b89\u5168\u3067\u3059\u3002<\/p>\n\n\n\n
\/\/ \u914d\u5217\u306e\u6df1\u3044\u6bd4\u8f03\nfunction array_identical($a, $b) {\n if (count($a) !== count($b)) {\n return false;\n }\n \n foreach ($a as $key => $value) {\n if (!array_key_exists($key, $b)) {\n return false;\n }\n \n if (is_array($value)) {\n if (!is_array($b[$key]) || !array_identical($value, $b[$key])) {\n return false;\n }\n } elseif ($value !== $b[$key]) {\n return false;\n }\n }\n \n return true;\n}\n<\/pre>\n\n\n\n\u914d\u5217\u306e\u6bd4\u8f03\u3067\u306f\u3001\u7279\u306b\u8981\u7d20\u306e\u9806\u5e8f\u3084\u5185\u90e8\u69cb\u9020\u304c\u91cd\u8981\u306a\u5834\u5408\u306f\u3001\u72ec\u81ea\u306e\u6bd4\u8f03\u30ed\u30b8\u30c3\u30af\u3092\u5b9f\u88c5\u3059\u308b\u3053\u3068\u3067\u3088\u308a\u5805\u7262\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n
\u5b9f\u8df5\u7684\u306aPHP\u6bd4\u8f03\u6f14\u7b97\u5b50\u306e\u4f7f\u3044\u3053\u306a\u3057\u8853<\/h2>\n\n\n\n
\u6bd4\u8f03\u6f14\u7b97\u5b50\u306e\u57fa\u672c\u3092\u7406\u89e3\u3057\u305f\u3089\u3001\u6b21\u306f\u5b9f\u8df5\u7684\u306a\u4f7f\u3044\u3053\u306a\u3057\u65b9\u3092\u7fd2\u5f97\u3057\u307e\u3057\u3087\u3046\u3002\u3053\u3053\u3067\u306f\u3001\u3088\u308a\u30af\u30ea\u30fc\u30f3\u3067\u4fdd\u5b88\u6027\u306e\u9ad8\u3044\u30b3\u30fc\u30c9\u3092\u66f8\u304f\u305f\u3081\u306e\u30c6\u30af\u30cb\u30c3\u30af\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n\n\n\n
\u4e09\u9805\u6f14\u7b97\u5b50\u3068\u7d44\u307f\u5408\u308f\u305b\u305f\u30a8\u30ec\u30ac\u30f3\u30c8\u306a\u6761\u4ef6\u5206\u5c90\u306e\u66f8\u304d\u65b9<\/h3>\n\n\n\n
\u4e09\u9805\u6f14\u7b97\u5b50\u306f\u6bd4\u8f03\u6f14\u7b97\u5b50\u3068\u7d44\u307f\u5408\u308f\u305b\u308b\u3053\u3068\u3067\u3001\u7c21\u6f54\u3067\u30a8\u30ec\u30ac\u30f3\u30c8\u306a\u6761\u4ef6\u51e6\u7406\u3092\u5b9f\u73fe\u3067\u304d\u307e\u3059\u3002\u57fa\u672c\u69cb\u6587\u306f
(\u6761\u4ef6) ? (\u771f\u306e\u5834\u5408\u306e\u5024) : (\u507d\u306e\u5834\u5408\u306e\u5024)<\/code> \u3067\u3059\u3002<\/p>\n\n\n\n\/\/ if-else\u6587\u306e\u4ee3\u308f\u308a\u306b\u4e09\u9805\u6f14\u7b97\u5b50\u3092\u4f7f\u7528\n$age = 20;\n$status = ($age >= 18) ? '\u6210\u4eba' : '\u672a\u6210\u5e74';\n\n\/\/ \u8907\u6570\u306e\u6761\u4ef6\u3092\u7d44\u307f\u5408\u308f\u305b\u308b\n$score = 85;\n$grade = ($score >= 90) ? 'A' : (($score >= 80) ? 'B' : (($score >= 70) ? 'C' : 'D'));\n\n\/\/ PHP 7.4\u4ee5\u964d\u3067\u306fnull\u5b89\u5168\u6f14\u7b97\u5b50(?->)\u3068\u306e\u4f75\u7528\u3082\u53ef\u80fd\n$user = null;\n$username = $user?->name ?? '\u30b2\u30b9\u30c8';\n<\/pre>\n\n\n\n\u4e09\u9805\u6f14\u7b97\u5b50\u306f\u30cd\u30b9\u30c8\u3059\u308b\u3053\u3068\u3082\u3067\u304d\u307e\u3059\u304c\u3001\u6df1\u3044\u30cd\u30b9\u30c8\u306f\u53ef\u8aad\u6027\u3092\u640d\u306a\u3046\u305f\u3081\u30012\u301c3\u30ec\u30d9\u30eb\u4ee5\u5185\u306b\u6291\u3048\u308b\u306e\u304c\u826f\u3044\u3067\u3057\u3087\u3046\u3002\u8907\u96d1\u306a\u6761\u4ef6\u306f\u3001\u4e2d\u9593\u5909\u6570\u3084\u95a2\u6570\u306b\u5206\u5272\u3059\u308b\u3068\u30b3\u30fc\u30c9\u304c\u6574\u7406\u3055\u308c\u307e\u3059\u3002<\/p>\n\n\n\n
\/\/ \u8907\u96d1\u306a\u6761\u4ef6\u306e\u5206\u5272\n$isAdult = $age >= 18;\n$hasPermission = $user !== null && $user->hasAccess();\n$canProceed = $isAdult && $hasPermission;\n$message = $canProceed ? '\u51e6\u7406\u3092\u7d9a\u884c\u3057\u307e\u3059' : '\u30a2\u30af\u30bb\u30b9\u304c\u62d2\u5426\u3055\u308c\u307e\u3057\u305f';\n<\/pre>\n\n\n\nswitch\u6587\u3068\u6bd4\u8f03\u6f14\u7b97\u5b50\u3092\u52b9\u679c\u7684\u306b\u4f7f\u3044\u5206\u3051\u308b\u30c6\u30af\u30cb\u30c3\u30af<\/h3>\n\n\n\n
switch\u6587\u306f\u8907\u6570\u306e\u5024\u3068\u306e\u6bd4\u8f03\u3092\u884c\u3046\u5834\u5408\u306b\u6709\u7528\u3067\u3059\u304c\u3001\u305d\u306e\u6319\u52d5\u3092\u6b63\u78ba\u306b\u7406\u89e3\u3059\u308b\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002switch\u6587\u306f\u5185\u90e8\u7684\u306b\u300c==\u300d\uff08\u7b49\u4fa1\u6bd4\u8f03\uff09\u3092\u4f7f\u7528\u3057\u3066\u304a\u308a\u3001\u578b\u5909\u63db\u304c\u884c\u308f\u308c\u308b\u3053\u3068\u306b\u6ce8\u610f\u304c\u5fc5\u8981\u3067\u3059\u3002<\/p>\n\n\n\n
$value = '1'; \/\/ \u6587\u5b57\u5217\u306e'1'\n\nswitch ($value) {\n case 1: \/\/ \u6570\u5024\u306e1\u3068\u6bd4\u8f03\uff08\u578b\u5909\u63db\u304c\u767a\u751f\uff09\n echo \"\u6570\u5024\u306e1\u3067\u3059\";\n break;\n case '1': \/\/ \u6587\u5b57\u5217\u306e'1'\u3068\u6bd4\u8f03\n echo \"\u6587\u5b57\u5217\u306e'1'\u3067\u3059\";\n break;\n default:\n echo \"\u3069\u308c\u306b\u3082\u4e00\u81f4\u3057\u307e\u305b\u3093\";\n}\n\/\/ \u51fa\u529b: \"\u6570\u5024\u306e1\u3067\u3059\" \u2190 \u578b\u5909\u63db\u306b\u3088\u308a\u6700\u521d\u306ecase\u306b\u4e00\u81f4\n<\/pre>\n\n\n\n\u53b3\u5bc6\u306a\u578b\u30c1\u30a7\u30c3\u30af\u304c\u5fc5\u8981\u306a\u5834\u5408\u306f\u3001switch\u6587\u3088\u308a\u3082if-elseif\u6587\u3068\u53b3\u5bc6\u6bd4\u8f03\u6f14\u7b97\u5b50\uff08===\uff09\u306e\u7d44\u307f\u5408\u308f\u305b\u3092\u4f7f\u7528\u3059\u308b\u306e\u304c\u9069\u5207\u3067\u3059\u3002\u4e00\u65b9\u3001\u540c\u3058\u5909\u6570\u306b\u5bfe\u3057\u3066\u8907\u6570\u306e\u5024\u3092\u6bd4\u8f03\u3059\u308b\u5358\u7d14\u306a\u30b1\u30fc\u30b9\u3067\u306f\u3001switch\u6587\u306e\u65b9\u304c\u8aad\u307f\u3084\u3059\u3044\u30b3\u30fc\u30c9\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n
\/\/ \u8907\u6570\u306e\u5024\u3092\u6bd4\u8f03\u3059\u308b\u5834\u5408\u306fswitch\u6587\u304c\u9069\u3057\u3066\u3044\u308b\n$role = 'editor';\n\nswitch ($role) {\n case 'admin':\n $permissions = ['read', 'write', 'delete', 'admin'];\n break;\n case 'editor':\n $permissions = ['read', 'write'];\n break;\n case 'viewer':\n $permissions = ['read'];\n break;\n default:\n $permissions = [];\n}\n<\/pre>\n\n\n\n\u8907\u6570\u6761\u4ef6\u306e\u6bd4\u8f03\u3092\u6700\u9069\u5316\u3059\u308b\u30a2\u30d7\u30ed\u30fc\u30c1<\/h3>\n\n\n\n
\u8907\u6570\u306e\u6761\u4ef6\u3092\u7d44\u307f\u5408\u308f\u305b\u308b\u5834\u5408\u3001\u77ed\u7d61\u8a55\u4fa1\uff08short-circuit evaluation\uff09\u3092\u6d3b\u7528\u3059\u308b\u3068\u51e6\u7406\u3092\u52b9\u7387\u5316\u3067\u304d\u307e\u3059\u3002PHP\u306e\u8ad6\u7406\u6f14\u7b97\u5b50\uff08&&, ||\uff09\u306f\u5de6\u304b\u3089\u53f3\u3078\u8a55\u4fa1\u3055\u308c\u3001\u7d50\u679c\u304c\u78ba\u5b9a\u3057\u305f\u6642\u70b9\u3067\u6b8b\u308a\u306e\u8a55\u4fa1\u3092\u30b9\u30ad\u30c3\u30d7\u3057\u307e\u3059\u3002<\/p>\n\n\n\n
\/\/ \u77ed\u7d61\u8a55\u4fa1\u306e\u6d3b\u7528\u4f8b\nfunction isValidUser($user) {\n \/\/ $user\u304cnull\u306e\u5834\u5408\u30012\u756a\u76ee\u306e\u6761\u4ef6\u306f\u8a55\u4fa1\u3055\u308c\u306a\u3044\n return $user !== null && $user->isActive === true;\n}\n\n\/\/ \u65e9\u671f\u30ea\u30bf\u30fc\u30f3\u30d1\u30bf\u30fc\u30f3\u3067\u30b3\u30fc\u30c9\u3092\u30d5\u30e9\u30c3\u30c8\u306b\u4fdd\u3064\nfunction processUser($user) {\n \/\/ \u7121\u52b9\u306a\u6761\u4ef6\u3092\u5148\u306b\u30c1\u30a7\u30c3\u30af\u3057\u3066\u30ea\u30bf\u30fc\u30f3\n if ($user === null) {\n return '\u30e6\u30fc\u30b6\u30fc\u304c\u6307\u5b9a\u3055\u308c\u3066\u3044\u307e\u305b\u3093';\n }\n \n if (!$user->isActive) {\n return '\u30a2\u30af\u30c6\u30a3\u30d6\u3067\u306a\u3044\u30e6\u30fc\u30b6\u30fc\u3067\u3059';\n }\n \n \/\/ \u30e1\u30a4\u30f3\u306e\u51e6\u7406\uff08\u30cd\u30b9\u30c8\u304c\u5c11\u306a\u304f\u306a\u308b\uff09\n return '\u51e6\u7406\u304c\u5b8c\u4e86\u3057\u307e\u3057\u305f';\n}\n<\/pre>\n\n\n\n\u8907\u96d1\u306a\u6761\u4ef6\u306f\u3001\u610f\u5473\u306e\u3042\u308b\u540d\u524d\u3092\u6301\u3064\u4e2d\u9593\u5909\u6570\u3084\u95a2\u6570\u306b\u5206\u89e3\u3059\u308b\u3053\u3068\u3067\u3001\u30b3\u30fc\u30c9\u306e\u610f\u56f3\u304c\u660e\u78ba\u306b\u306a\u308a\u4fdd\u5b88\u6027\u304c\u5411\u4e0a\u3057\u307e\u3059\u3002<\/p>\n\n\n\n
\/\/ \u8907\u96d1\u306a\u6761\u4ef6\u3092\u5206\u89e3\u3059\u308b\n$isEligibleForDiscount = \n ($user->isPremium || $user->purchaseCount > 5) && \n ($currentDate < $promotionEndDate) &&\n !$user->hasUsedCoupon;\n\n\/\/ \u3088\u308a\u8aad\u307f\u3084\u3059\u3044\u5206\u89e3\u7248\n$isLoyalCustomer = $user->isPremium || $user->purchaseCount > 5;\n$isPromotionActive = $currentDate < $promotionEndDate;\n$hasUnusedCoupon = !$user->hasUsedCoupon;\n\n$isEligibleForDiscount = $isLoyalCustomer && $isPromotionActive && $hasUnusedCoupon;\n<\/pre>\n\n\n\n\u307e\u305f\u3001PHP7\u4ee5\u964d\u3067\u306fNull\u5408\u4f53\u6f14\u7b97\u5b50\uff08??\uff09\u3092\u4f7f\u3063\u3066\u3001null\u30c1\u30a7\u30c3\u30af\u3092\u7c21\u6f54\u306b\u66f8\u304f\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n
\/\/ Null\u5408\u4f53\u6f14\u7b97\u5b50\u3092\u4f7f\u3063\u305f\u30c7\u30d5\u30a9\u30eb\u30c8\u5024\u306e\u8a2d\u5b9a\n$username = $_GET['user'] ?? '\u30b2\u30b9\u30c8';\n\n\/\/ \u4ee5\u524d\u306e\u66f8\u304d\u65b9\n$username = isset($_GET['user']) ? $_GET['user'] : '\u30b2\u30b9\u30c8';\n<\/pre>\n\n\n\n\u3053\u308c\u3089\u306e\u30c6\u30af\u30cb\u30c3\u30af\u3092\u9069\u5207\u306b\u7d44\u307f\u5408\u308f\u305b\u308b\u3053\u3068\u3067\u3001\u6bd4\u8f03\u6f14\u7b97\u5b50\u3092\u6d3b\u7528\u3057\u305f\u8aad\u307f\u3084\u3059\u304f\u52b9\u7387\u7684\u306a\u30b3\u30fc\u30c9\u3092\u66f8\u304f\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n
\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u3068\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u8003\u616e\u3057\u305f\u6bd4\u8f03\u6f14\u7b97\u5b50\u306e\u9078\u629e<\/h2>\n\n\n\n
\u6bd4\u8f03\u6f14\u7b97\u5b50\u306e\u9078\u629e\u306f\u3001\u5358\u306a\u308b\u69cb\u6587\u306e\u554f\u984c\u3067\u306f\u306a\u304f\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u3068\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306b\u76f4\u63a5\u5f71\u97ff\u3057\u307e\u3059\u3002\u3053\u306e\u89b3\u70b9\u304b\u3089\u3001\u3088\u308a\u5b89\u5168\u3067\u52b9\u7387\u7684\u306a\u30b3\u30fc\u30c9\u3092\u66f8\u304f\u305f\u3081\u306e\u65b9\u6cd5\u3092\u898b\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n
\u30bf\u30a4\u30d7\u30b8\u30e3\u30b0\u30ea\u30f3\u30b0\u3092\u60aa\u7528\u3057\u305f\u653b\u6483\u3068\u305d\u306e\u9632\u5fa1\u7b56<\/h3>\n\n\n\n
PHP\u306e\u67d4\u8edf\u306a\u578b\u5909\u63db\uff08\u30bf\u30a4\u30d7\u30b8\u30e3\u30b0\u30ea\u30f3\u30b0\uff09\u306f\u3001\u60aa\u610f\u3042\u308b\u653b\u6483\u8005\u306b\u3088\u3063\u3066\u60aa\u7528\u3055\u308c\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002\u7279\u306b\u6ce8\u610f\u3059\u3079\u304d\u4e8b\u4f8b\u3068\u3057\u3066\u3001\u79d1\u5b66\u7684\u8a18\u6570\u6cd5\u306e\u6271\u3044\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n
\/\/ \u79d1\u5b66\u7684\u8a18\u6570\u6cd5\u306e\u6587\u5b57\u5217\u306fPHP\u3067\u6570\u5024\u3068\u3057\u3066\u89e3\u91c8\u3055\u308c\u308b\nvar_dump(\"0e123456\" == \"0e789012\"); \/\/ bool(true) \u2190 \u4e21\u65b9\u3068\u30820\u3068\u89e3\u91c8\u3055\u308c\u308b\nvar_dump(\"0e123456\" === \"0e789012\"); \/\/ bool(false) \u2190 \u53b3\u5bc6\u6bd4\u8f03\u3067\u306f\u6587\u5b57\u5217\u3068\u3057\u3066\u6bd4\u8f03\n\n\/\/ \u3053\u308c\u304c\u8a8d\u8a3c\u30b7\u30b9\u30c6\u30e0\u3067\u4f7f\u308f\u308c\u308b\u3068\u5371\u967a\n$stored_hash = \"0e123456789\"; \/\/ DB\u306b\u4fdd\u5b58\u3055\u308c\u305f\u30cf\u30c3\u30b7\u30e5\u304c\u4eee\u306b\u3053\u306e\u3088\u3046\u306a\u5024\u3060\u3063\u305f\u5834\u5408\n$input = \"0e987654321\"; \/\/ \u653b\u6483\u8005\u304c\u7279\u5b9a\u306e\u5165\u529b\u3092\u8a66\u307f\u308b\nif ($stored_hash == $input) { \/\/ \u30eb\u30fc\u30ba\u306a\u6bd4\u8f03\u3092\u4f7f\u7528\n echo \"\u8a8d\u8a3c\u6210\u529f\uff01\"; \/\/ \u2190 \u8106\u5f31\u6027\u306b\u3064\u306a\u304c\u308b\n}\n<\/pre>\n\n\n\n\u3053\u306e\u554f\u984c\u3078\u306e\u5bfe\u7b56\u306f\u660e\u78ba\u3067\u3059\u3002\u30e6\u30fc\u30b6\u30fc\u8a8d\u8a3c\u3084\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u95a2\u9023\u306e\u6bd4\u8f03\u306b\u306f\u5fc5\u305a\u53b3\u5bc6\u6bd4\u8f03\u6f14\u7b97\u5b50\uff08===\uff09\u3092\u4f7f\u7528\u3057\u3001\u7279\u306b\u30d1\u30b9\u30ef\u30fc\u30c9\u30cf\u30c3\u30b7\u30e5\u306e\u6bd4\u8f03\u306b\u306f\u5c02\u7528\u306e
hash_equals()<\/code>\u95a2\u6570\u3092\u4f7f\u3044\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n\/\/ \u5b89\u5168\u306a\u6bd4\u8f03\u65b9\u6cd5\n$stored_hash = password_hash(\"password123\", PASSWORD_DEFAULT);\n$input_hash = password_hash($user_input, PASSWORD_DEFAULT);\n\n\/\/ \u5b9a\u6570\u6642\u9593\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u3067\u6bd4\u8f03\uff08\u30bf\u30a4\u30df\u30f3\u30b0\u653b\u6483\u3092\u9632\u6b62\uff09\n$is_valid = hash_equals($stored_hash, $input_hash);\n<\/pre>\n\n\n\n\u307e\u305f\u3001\u30e6\u30fc\u30b6\u30fc\u5165\u529b\u3068\u76f4\u63a5\u6bd4\u8f03\u3059\u308b\u5834\u5408\u306f\u3001\u5fc5\u305a\u9069\u5207\u306a\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u3092\u884c\u3044\u3001\u578b\u3092\u660e\u793a\u7684\u306b\u5909\u63db\u3059\u308b\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002<\/p>\n\n\n\n
\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u610f\u8b58\u3057\u305f\u6bd4\u8f03\u6f14\u7b97\u5b50\u306e\u9078\u3073\u65b9<\/h3>\n\n\n\n
\u6bd4\u8f03\u6f14\u7b97\u5b50\u306e\u9078\u629e\u306f\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306b\u3082\u5f71\u97ff\u3057\u307e\u3059\u3002\u4e00\u822c\u7684\u306b\u3001\u53b3\u5bc6\u6bd4\u8f03\u6f14\u7b97\u5b50\uff08===, !==\uff09\u306f\u578b\u5909\u63db\u304c\u4e0d\u8981\u306a\u305f\u3081\u3001\u7b49\u4fa1\u6bd4\u8f03\u6f14\u7b97\u5b50\uff08==, !=\uff09\u3088\u308a\u3082\u9ad8\u901f\u3067\u3059\u3002<\/p>\n\n\n\n
\/\/ \u7c21\u6613\u30d9\u30f3\u30c1\u30de\u30fc\u30af\u306e\u4f8b\n$start = microtime(true);\nfor ($i = 0; $i < 1000000; $i++) {\n $result = \"100\" == 100; \/\/ \u578b\u5909\u63db\u304c\u5fc5\u8981\n}\n$loose_time = microtime(true) - $start;\n\n$start = microtime(true);\nfor ($i = 0; $i < 1000000; $i++) {\n $result = \"100\" === 100; \/\/ \u578b\u5909\u63db\u306a\u3057\uff08\u3059\u3050\u306bfalse\u3068\u5224\u5b9a\uff09\n}\n$strict_time = microtime(true) - $start;\n\necho \"\u30eb\u30fc\u30ba\u306a\u6bd4\u8f03\u6642\u9593: \" . $loose_time . \"\u79d2\\n\";\necho \"\u53b3\u5bc6\u6bd4\u8f03\u6642\u9593: \" . $strict_time . \"\u79d2\\n\";\n\/\/ \u7d50\u679c: \u53b3\u5bc6\u6bd4\u8f03\u306e\u65b9\u304c\u9ad8\u901f\n<\/pre>\n\n\n\n\u5927\u91cf\u306e\u30c7\u30fc\u30bf\u51e6\u7406\u3084\u7e70\u308a\u8fd4\u3057\u5b9f\u884c\u3055\u308c\u308b\u51e6\u7406\u3067\u306f\u3001\u3053\u3046\u3057\u305f\u5c0f\u3055\u306a\u9055\u3044\u304c\u7a4d\u307f\u91cd\u306a\u3063\u3066\u5168\u4f53\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306b\u5f71\u97ff\u3057\u307e\u3059\u3002\u307e\u305f\u3001\u6587\u5b57\u5217\u6bd4\u8f03\u306b\u306f
strcmp()<\/code>\u3084strcasecmp()<\/code>\u306a\u3069\u306e\u5c02\u7528\u95a2\u6570\u3092\u4f7f\u3046\u3068\u3001\u7279\u5b9a\u306e\u30b1\u30fc\u30b9\u3067\u3088\u308a\u52b9\u7387\u7684\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n\u914d\u5217\u3084\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u6bd4\u8f03\u3082\u614e\u91cd\u306b\u884c\u3044\u307e\u3057\u3087\u3046\u3002\u5927\u304d\u306a\u914d\u5217\u306e\u6bd4\u8f03\u306f\u30ea\u30bd\u30fc\u30b9\u3092\u6d88\u8cbb\u3059\u308b\u305f\u3081\u3001\u5fc5\u8981\u6700\u5c0f\u9650\u306e\u6bd4\u8f03\u306b\u3068\u3069\u3081\u308b\u304b\u3001\u30ad\u30fc\u306e\u5b58\u5728\u78ba\u8a8d\u306a\u3069\u90e8\u5206\u7684\u306a\u6bd4\u8f03\u3092\u691c\u8a0e\u3057\u307e\u3059\u3002<\/p>\n\n\n\n
\u30b3\u30fc\u30c9\u306e\u53ef\u8aad\u6027\u3068\u4fdd\u5b88\u6027\u3092\u9ad8\u3081\u308b\u6bd4\u8f03\u51e6\u7406\u306e\u8a2d\u8a08<\/h3>\n\n\n\n
\u6bd4\u8f03\u6f14\u7b97\u5b50\u306e\u9078\u629e\u30dd\u30ea\u30b7\u30fc\u3092\u4e00\u8cab\u3055\u305b\u308b\u3053\u3068\u306f\u3001\u30b3\u30fc\u30c9\u306e\u53ef\u8aad\u6027\u3068\u4fdd\u5b88\u6027\u3092\u9ad8\u3081\u308b\u91cd\u8981\u306a\u8981\u7d20\u3067\u3059\u3002\u30c1\u30fc\u30e0\u958b\u767a\u3067\u306f\u3001\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u5168\u4f53\u3067\u7d71\u4e00\u3057\u305f\u30ac\u30a4\u30c9\u30e9\u30a4\u30f3\u3092\u8a2d\u3051\u308b\u3068\u3088\u3044\u3067\u3057\u3087\u3046\u3002<\/p>\n\n\n\n
\/\/ \u53ef\u8aad\u6027\u3092\u9ad8\u3081\u308b\u65b9\u6cd5\u306e\u4f8b\n\/\/ 1. \u8907\u96d1\u306a\u6bd4\u8f03\u30ed\u30b8\u30c3\u30af\u3092\u95a2\u6570\u5316\nfunction isValidProduct($product) {\n return $product !== null && \n $product->status === 'active' &&\n $product->stock > 0 &&\n $product->price > 0;\n}\n\n\/\/ 2. \u578b\u3092\u660e\u793a\u3057\u305f\u5909\u6570\u540d\n$string_id = (string) $input_id; \/\/ \u6587\u5b57\u5217\u3068\u3057\u3066\u6271\u3046\u3053\u3068\u3092\u660e\u793a\n$numeric_price = (float) $price_input; \/\/ \u6570\u5024\u3068\u3057\u3066\u6271\u3046\u3053\u3068\u3092\u660e\u793a\n\n\/\/ 3. \u6bd4\u8f03\u306e\u610f\u56f3\u3092\u660e\u78ba\u306b\u3059\u308b\u30b3\u30e1\u30f3\u30c8\n\/\/ \u30ab\u30fc\u30c8\u5408\u8a08\u304c\u9001\u6599\u7121\u6599\u306e\u95be\u5024\u3092\u8d85\u3048\u3066\u3044\u308b\u304b\u78ba\u8a8d\nif ($cart_total >= self::FREE_SHIPPING_THRESHOLD) {\n $shipping_cost = 0;\n}\n<\/pre>\n\n\n\n\u8907\u96d1\u306a\u6bd4\u8f03\u6761\u4ef6\u306f\u3001\u610f\u5473\u306e\u3042\u308b\u540d\u524d\u3092\u6301\u3064\u30d8\u30eb\u30d1\u30fc\u95a2\u6570\u306b\u5206\u89e3\u3059\u308b\u3068\u3001\u30b3\u30fc\u30c9\u306e\u610f\u56f3\u304c\u660e\u78ba\u306b\u306a\u308a\u3001\u518d\u5229\u7528\u6027\u3082\u9ad8\u307e\u308a\u307e\u3059\u3002\u307e\u305f\u3001\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u30ed\u30b8\u30c3\u30af\u306f\u96c6\u4e2d\u7ba1\u7406\u3057\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u5168\u4f53\u3067\u4e00\u8cab\u3057\u3066\u9069\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u30db\u30fc\u30eb\u3092\u6e1b\u3089\u3059\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n
\/\/ \u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u306e\u96c6\u4e2d\u7ba1\u7406\u4f8b\nclass Validator {\n public static function isValidEmail($email) {\n return filter_var($email, FILTER_VALIDATE_EMAIL) !== false;\n }\n \n public static function isValidPassword($password) {\n \/\/ \u8907\u96d1\u306a\u30d1\u30b9\u30ef\u30fc\u30c9\u30dd\u30ea\u30b7\u30fc\u3092\u3053\u3053\u3067\u4e00\u5143\u7ba1\u7406\n return strlen($password) >= 8 && \n preg_match('\/[A-Z]\/', $password) && \n preg_match('\/[0-9]\/', $password);\n }\n}\n\n\/\/ \u4f7f\u7528\u4f8b\nif (!Validator::isValidEmail($user_input)) {\n $errors[] = '\u30e1\u30fc\u30eb\u30a2\u30c9\u30ec\u30b9\u306e\u5f62\u5f0f\u304c\u6b63\u3057\u304f\u3042\u308a\u307e\u305b\u3093';\n}\n<\/pre>\n\n\n\n\u6bd4\u8f03\u6f14\u7b97\u5b50\u306e\u9078\u629e\u306f\u3001\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u3001\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3001\u53ef\u8aad\u6027\u306e\u30c8\u30ea\u30d7\u30eb\u30d0\u30e9\u30f3\u30b9\u3092\u8003\u616e\u3057\u3066\u884c\u3044\u307e\u3057\u3087\u3046\u3002\u7279\u306b\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u304c\u91cd\u8981\u306a\u5834\u9762\u3067\u306f\u3001\u5c11\u3005\u5197\u9577\u3067\u3042\u3063\u3066\u3082\u6700\u3082\u5b89\u5168\u306a\u65b9\u6cd5\u3092\u9078\u629e\u3059\u308b\u3053\u3068\u304c\u8ce2\u660e\u3067\u3059\u3002<\/p>\n\n\n\n
\u73fe\u5834\u3067\u6d3b\u304b\u305b\u308bPHP\u6bd4\u8f03\u6f14\u7b97\u5b50\u306e7\u3064\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/h2>\n\n\n\n
\u3053\u308c\u307e\u3067\u306e\u5185\u5bb9\u3092\u8e0f\u307e\u3048\u3001\u5b9f\u969b\u306e\u958b\u767a\u73fe\u5834\u3067\u6d3b\u7528\u3067\u304d\u308b\u6bd4\u8f03\u6f14\u7b97\u5b50\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u3092\u307e\u3068\u3081\u307e\u3057\u305f\u3002\u3053\u308c\u3089\u306e\u7fd2\u6163\u3092\u8eab\u306b\u3064\u3051\u308b\u3053\u3068\u3067\u3001\u30d0\u30b0\u306e\u5c11\u306a\u3044\u5805\u7262\u306aPHP\u30b3\u30fc\u30c9\u3092\u66f8\u304f\u3053\u3068\u304c\u3067\u304d\u308b\u3067\u3057\u3087\u3046\u3002<\/p>\n\n\n\n
\u5e38\u306b\u578b\u3092\u610f\u8b58\u3057\u3066\u9069\u5207\u306a\u6bd4\u8f03\u6f14\u7b97\u5b50\u3092\u9078\u3076<\/h3>\n\n\n\n
PHP\u306e\u6bd4\u8f03\u6f14\u7b97\u5b50\u3092\u4f7f\u3046\u969b\u306f\u3001\u5e38\u306b\u6271\u3063\u3066\u3044\u308b\u30c7\u30fc\u30bf\u306e\u578b\u3092\u610f\u8b58\u3057\u307e\u3057\u3087\u3046\u3002\u57fa\u672c\u7684\u306b\u306f\u53b3\u5bc6\u6bd4\u8f03\u6f14\u7b97\u5b50\uff08===, !==\uff09\u3092\u512a\u5148\u7684\u306b\u4f7f\u7528\u3057\u3001\u610f\u56f3\u7684\u306b\u578b\u5909\u63db\u304c\u5fc5\u8981\u306a\u5834\u5408\u306f\u660e\u793a\u7684\u306b\u884c\u3044\u307e\u3059\u3002<\/p>\n\n\n\n
\/\/ \u60aa\u3044\u4f8b: \u578b\u3092\u610f\u8b58\u3057\u3066\u3044\u306a\u3044\u6bd4\u8f03\nif ($user_id == $stored_id) { \/* ... *\/ }\n\n\/\/ \u826f\u3044\u4f8b: \u578b\u3092\u610f\u8b58\u3057\u305f\u6bd4\u8f03\nif ($user_id === $stored_id) { \/* ... *\/ }\n\n\/\/ \u3042\u308b\u3044\u306f\u660e\u793a\u7684\u306b\u578b\u5909\u63db\u3057\u3066\u304b\u3089\u6bd4\u8f03\nif ((int)$user_id === $stored_id) { \/* ... *\/ }\n<\/pre>\n\n\n\n\u7279\u306b\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u304b\u3089\u53d6\u5f97\u3057\u305f\u5024\uff08\u6587\u5b57\u5217\u3068\u3057\u3066\u8fd4\u3055\u308c\u308b\u3053\u3068\u304c\u591a\u3044\uff09\u3068\u6570\u5024\u3092\u6bd4\u8f03\u3059\u308b\u5834\u5408\u306f\u6ce8\u610f\u304c\u5fc5\u8981\u3067\u3059\u3002\u610f\u56f3\u3092\u660e\u78ba\u306b\u3059\u308b\u305f\u3081\u306b\u578b\u5909\u63db\u3092\u660e\u793a\u7684\u306b\u884c\u3046\u304b\u3001\u53b3\u5bc6\u6bd4\u8f03\u6f14\u7b97\u5b50\u3092\u4f7f\u7528\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n
\u8907\u96d1\u306a\u6761\u4ef6\u306f\u5206\u89e3\u3057\u3066\u53ef\u8aad\u6027\u3092\u9ad8\u3081\u308b<\/h3>\n\n\n\n
\u8907\u96d1\u306a\u6761\u4ef6\u5f0f\u306f\u7406\u89e3\u3057\u3065\u3089\u304f\u3001\u4fdd\u5b88\u304c\u96e3\u3057\u304f\u306a\u308a\u307e\u3059\u3002\u9577\u3044\u6761\u4ef6\u5f0f\u306f\u610f\u5473\u306e\u3042\u308b\u540d\u524d\u306e\u4e2d\u9593\u5909\u6570\u3084\u95a2\u6570\u306b\u5206\u89e3\u3057\u3001\u30b3\u30fc\u30c9\u306e\u610f\u56f3\u3092\u660e\u78ba\u306b\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n
\/\/ \u60aa\u3044\u4f8b: \u9577\u304f\u8907\u96d1\u306a\u6761\u4ef6\u5f0f\nif (($user->role === 'admin' || $user->role === 'editor') && \n ($user->status === 'active') && \n (time() - $user->last_login < 86400 * 30)) {\n \/\/ ...\n}\n\n\/\/ \u826f\u3044\u4f8b: \u5206\u89e3\u3055\u308c\u305f\u6761\u4ef6\u5f0f\n$hasEditPermission = $user->role === 'admin' || $user->role === 'editor';\n$isActive = $user->status === 'active';\n$hasRecentLogin = time() - $user->last_login < 86400 * 30; \/\/ 30\u65e5\u4ee5\u5185\n\nif ($hasEditPermission && $isActive && $hasRecentLogin) {\n \/\/ ...\n}\n<\/pre>\n\n\n\n\u3053\u306e\u30a2\u30d7\u30ed\u30fc\u30c1\u306f\u30b3\u30fc\u30c9\u306e\u81ea\u5df1\u6587\u66f8\u5316\u3092\u4fc3\u9032\u3057\u3001\u3069\u306e\u3088\u3046\u306a\u6761\u4ef6\u3067\u30ed\u30b8\u30c3\u30af\u304c\u5b9f\u884c\u3055\u308c\u308b\u306e\u304b\u304c\u4e00\u76ee\u3067\u308f\u304b\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002\u307e\u305f\u3001\u6761\u4ef6\u306e\u4e00\u90e8\u3092\u518d\u5229\u7528\u3059\u308b\u3053\u3068\u3082\u5bb9\u6613\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n
\u30e6\u30fc\u30b6\u30fc\u5165\u529b\u306e\u6bd4\u8f03\u306f\u5fc5\u305a\u53b3\u5bc6\u6bd4\u8f03\u3092\u4f7f\u7528\u3059\u308b<\/h3>\n\n\n\n
\u30e6\u30fc\u30b6\u30fc\u5165\u529b\u306f\u3042\u3089\u3086\u308b\u5f62\u614b\u3067\u5c4a\u304f\u53ef\u80fd\u6027\u304c\u3042\u308a\u3001\u4e88\u6e2c\u4e0d\u80fd\u3067\u3059\u3002\u7279\u306b\u8a8d\u8a3c\u3084\u30a2\u30af\u30bb\u30b9\u5236\u5fa1\u306a\u3069\u306e\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u306b\u95a2\u308f\u308b\u6bd4\u8f03\u3067\u306f\u3001\u53b3\u5bc6\u6bd4\u8f03\u6f14\u7b97\u5b50\uff08===, !==\uff09\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002<\/p>\n\n\n\n
\/\/ \u8106\u5f31\u306a\u4f8b\nfunction verifyApiToken($input_token) {\n $stored_token = getStoredToken();\n return $input_token == $stored_token; \/\/ \u5371\u967a\uff01\n}\n\n\/\/ \u5b89\u5168\u306a\u4f8b\nfunction verifyApiToken($input_token) {\n $stored_token = getStoredToken();\n \/\/ \u6587\u5b57\u5217\u3068\u3057\u3066\u306e\u53b3\u5bc6\u6bd4\u8f03\n return is_string($input_token) && \n is_string($stored_token) && \n hash_equals($stored_token, $input_token); \/\/ \u5b9a\u6570\u6642\u9593\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u3067\u306e\u6bd4\u8f03\n}\n<\/pre>\n\n\n\n\u7279\u306b\u30d1\u30b9\u30ef\u30fc\u30c9\u3084\u30c8\u30fc\u30af\u30f3\u306e\u6bd4\u8f03\u306b\u306f
hash_equals()<\/code>\u95a2\u6570\u3092\u4f7f\u7528\u3057\u3066\u3001\u30bf\u30a4\u30df\u30f3\u30b0\u653b\u6483\u304b\u3089\u3082\u4fdd\u8b77\u3059\u308b\u306e\u304c\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u3067\u3059\u3002<\/p>\n\n\n\n\u914d\u5217\u306e\u6bd4\u8f03\u306f\u5c02\u7528\u95a2\u6570\u306e\u6d3b\u7528\u3092\u691c\u8a0e\u3059\u308b<\/h3>\n\n\n\n
\u914d\u5217\u306e\u6bd4\u8f03\u306f\u3001\u5358\u7d14\u306a\u6f14\u7b97\u5b50\u3067\u306f\u601d\u308f\u306c\u52d5\u4f5c\u3092\u3059\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002PHP\u304c\u63d0\u4f9b\u3059\u308b\u5c02\u7528\u306e\u914d\u5217\u64cd\u4f5c\u95a2\u6570\u3092\u6d3b\u7528\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n
\/\/ \u4e0d\u5341\u5206\u306a\u4f8b: \u5358\u7d14\u306a\u6f14\u7b97\u5b50\u306b\u3088\u308b\u6bd4\u8f03\n$diff = $array1 == $array2; \/\/ \u8981\u7d20\u6570\u3084\u9806\u5e8f\u306b\u3088\u3063\u3066\u4e88\u671f\u305b\u306c\u7d50\u679c\u306b\n\n\/\/ \u826f\u3044\u4f8b: \u76ee\u7684\u306b\u5fdc\u3058\u305f\u5c02\u7528\u95a2\u6570\u306e\u4f7f\u7528\n$missing_items = array_diff($expected, $actual); \/\/ \u671f\u5f85\u5024\u306b\u3042\u3063\u3066\u5b9f\u969b\u306e\u5024\u306b\u306a\u3044\u8981\u7d20\n$extra_items = array_diff($actual, $expected); \/\/ \u5b9f\u969b\u306e\u5024\u306b\u3042\u3063\u3066\u671f\u5f85\u5024\u306b\u306a\u3044\u8981\u7d20\n$common_items = array_intersect($array1, $array2); \/\/ \u5171\u901a\u8981\u7d20\n\n\/\/ \u30ad\u30fc\u3082\u542b\u3081\u3066\u6bd4\u8f03\n$identical = $array1 === $array2; \/\/ \u5024\u3068\u30ad\u30fc\u3068\u9806\u5e8f\u3059\u3079\u3066\u304c\u540c\u3058\n<\/pre>\n\n\n\n\u914d\u5217\u3092\u6bd4\u8f03\u3059\u308b\u969b\u306f\u3001\u4f55\u3092\u6bd4\u8f03\u3057\u305f\u3044\u306e\u304b\uff08\u8981\u7d20\u306e\u5b58\u5728\u3001\u9806\u5e8f\u3001\u30ad\u30fc\u3068\u5024\u306e\u4e21\u65b9\u306a\u3069\uff09\u3092\u660e\u78ba\u306b\u3057\u3001\u76ee\u7684\u306b\u5408\u3063\u305f\u95a2\u6570\u3084\u30a2\u30d7\u30ed\u30fc\u30c1\u3092\u9078\u3073\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n
\u6d6e\u52d5\u5c0f\u6570\u70b9\u6570\u306e\u6bd4\u8f03\u306b\u306f\u8a31\u5bb9\u8aa4\u5dee\u3092\u8003\u616e\u3059\u308b<\/h3>\n\n\n\n
\u6d6e\u52d5\u5c0f\u6570\u70b9\u6570\u306e\u6bd4\u8f03\u306f\u3001\u30b3\u30f3\u30d4\u30e5\u30fc\u30bf\u306e\u6d6e\u52d5\u5c0f\u6570\u70b9\u8868\u73fe\u306e\u6027\u8cea\u4e0a\u3001\u76f4\u611f\u306b\u53cd\u3059\u308b\u7d50\u679c\u3092\u3082\u305f\u3089\u3059\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002\u5c0f\u6570\u70b9\u6570\u3092\u6bd4\u8f03\u3059\u308b\u969b\u306f\u3001\u7d76\u5bfe\u5024\u306e\u5dee\u304c\u8a31\u5bb9\u7bc4\u56f2\u5185\u304b\u3069\u3046\u304b\u3092\u78ba\u8a8d\u3059\u308b\u306e\u304c\u4e00\u822c\u7684\u3067\u3059\u3002<\/p>\n\n\n\n
\/\/ \u554f\u984c\u306e\u3042\u308b\u4f8b\n$a = 0.1 + 0.2;\n$b = 0.3;\nvar_dump($a === $b); \/\/ bool(false) - \u4e88\u60f3\u5916\u306e\u7d50\u679c\u306b\uff01\n\n\/\/ \u6b63\u3057\u3044\u30a2\u30d7\u30ed\u30fc\u30c1\nfunction isEqualFloat($a, $b, $epsilon = 0.00001) {\n return abs($a - $b) < $epsilon;\n}\n\nvar_dump(isEqualFloat($a, $b)); \/\/ bool(true)\n<\/pre>\n\n\n\n\u3088\u308a\u9ad8\u7cbe\u5ea6\u306a\u8a08\u7b97\u304c\u5fc5\u8981\u306a\u5834\u5408\u306f\u3001BCMath\u62e1\u5f35\u306a\u3069\u306e\u9ad8\u7cbe\u5ea6\u8a08\u7b97\u30e9\u30a4\u30d6\u30e9\u30ea\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3082\u691c\u8a0e\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n
\u30b3\u30e1\u30f3\u30c8\u3067\u6bd4\u8f03\u306e\u610f\u56f3\u3092\u660e\u78ba\u306b\u3059\u308b\u7fd2\u6163\u3092\u3064\u3051\u308b<\/h3>\n\n\n\n
\u7279\u6b8a\u306a\u6bd4\u8f03\u30ed\u30b8\u30c3\u30af\u3084\u3001\u4e00\u898b\u3057\u3066\u610f\u56f3\u304c\u308f\u304b\u308a\u306b\u304f\u3044\u6bd4\u8f03\u306b\u306f\u3001\u30b3\u30e1\u30f3\u30c8\u3067\u305d\u306e\u7406\u7531\u3084\u671f\u5f85\u3055\u308c\u308b\u52d5\u4f5c\u3092\u8aac\u660e\u3057\u307e\u3057\u3087\u3046\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u30b3\u30fc\u30c9\u30ec\u30d3\u30e5\u30fc\u3084\u5c06\u6765\u306e\u30e1\u30f3\u30c6\u30ca\u30f3\u30b9\u304c\u5bb9\u6613\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n
\/\/ \u30e1\u30fc\u30eb\u30a2\u30c9\u30ec\u30b9\u306e\u91cd\u8907\u30c1\u30a7\u30c3\u30af\uff08\u5927\u6587\u5b57\u5c0f\u6587\u5b57\u306f\u533a\u5225\u3057\u306a\u3044\uff09\n$email_exists = strtolower($new_email) === strtolower($stored_email);\n\n\/\/ \u88fd\u54c1\u306e\u5728\u5eab\u72b6\u614b\u30c1\u30a7\u30c3\u30af\uff08\u30d0\u30c3\u30af\u30aa\u30fc\u30c0\u30fc\u53ef\u80fd\u306a\u88fd\u54c1\u306f\u5728\u5eab0\u3067\u3082\u8cfc\u5165\u53ef\u80fd\uff09\nif ($product->stock > 0 || ($product->stock === 0 && $product->backorder_allowed)) {\n $can_purchase = true;\n}\n\n\/\/ \u30bf\u30a4\u30e0\u30b9\u30bf\u30f3\u30d7\u306e\u6bd4\u8f03\uff081\u6642\u9593\u4ee5\u5185\u306b\u66f4\u65b0\u3055\u308c\u305f\u304b\u3092\u30c1\u30a7\u30c3\u30af\uff09\n$recently_updated = (time() - $last_update_time) < 3600;\n<\/pre>\n\n\n\n\u3053\u308c\u3089\u306e\u30b3\u30e1\u30f3\u30c8\u306f\u3001\u30b3\u30fc\u30c9\u306e\u610f\u56f3\u3092\u660e\u78ba\u306b\u3057\u3001\u4ed6\u306e\u958b\u767a\u8005\uff08\u305d\u3057\u3066\u5c06\u6765\u306e\u81ea\u5206\uff09\u304c\u30b3\u30fc\u30c9\u3092\u7406\u89e3\u3059\u308b\u306e\u306b\u5f79\u7acb\u3061\u307e\u3059\u3002<\/p>\n\n\n\n
\u30e6\u30cb\u30c3\u30c8\u30c6\u30b9\u30c8\u3067\u6bd4\u8f03\u30ed\u30b8\u30c3\u30af\u306e\u5805\u7262\u6027\u3092\u78ba\u4fdd\u3059\u308b<\/h3>\n\n\n\n
\u6bd4\u8f03\u30ed\u30b8\u30c3\u30af\u3001\u7279\u306b\u8907\u96d1\u306a\u3082\u306e\u3084\u91cd\u8981\u306a\u30d3\u30b8\u30cd\u30b9\u30ed\u30b8\u30c3\u30af\u306b\u95a2\u308f\u308b\u3082\u306e\u306f\u3001\u30e6\u30cb\u30c3\u30c8\u30c6\u30b9\u30c8\u3067\u305d\u306e\u5805\u7262\u6027\u3092\u78ba\u4fdd\u3057\u307e\u3057\u3087\u3046\u3002\u5883\u754c\u5024\u3084\u30a8\u30c3\u30b8\u30b1\u30fc\u30b9\u3092\u8003\u616e\u3057\u305f\u30c6\u30b9\u30c8\u30b1\u30fc\u30b9\u3092\u4f5c\u6210\u3057\u307e\u3059\u3002<\/p>\n\n\n\n
\/\/ PHPUnit\u3092\u4f7f\u3063\u305f\u30c6\u30b9\u30c8\u4f8b\npublic function testUserAgeValidation()\n{\n $validator = new UserValidator();\n \n \/\/ \u5883\u754c\u5024\u306e\u30c6\u30b9\u30c8\n $this->assertTrue($validator->isAdult(18));\n $this->assertFalse($validator->isAdult(17));\n \n \/\/ \u578b\u306e\u7570\u306a\u308b\u5165\u529b\u5024\u306e\u30c6\u30b9\u30c8\n $this->assertTrue($validator->isAdult(\"18\"));\n $this->assertFalse($validator->isAdult(\"17\"));\n \n \/\/ \u30a8\u30c3\u30b8\u30b1\u30fc\u30b9\u306e\u30c6\u30b9\u30c8\n $this->assertFalse($validator->isAdult(-1));\n $this->assertFalse($validator->isAdult(null));\n $this->assertFalse($validator->isAdult(\"abc\"));\n}\n<\/pre>\n\n\n\n\u7279\u306b\u7570\u306a\u308b\u578b\u306e\u5165\u529b\u5024\u3067\u306e\u30c6\u30b9\u30c8\u306f\u3001PHP\u306e\u6bd4\u8f03\u6f14\u7b97\u5b50\u306e\u6319\u52d5\u3092\u7406\u89e3\u3059\u308b\u4e0a\u3067\u91cd\u8981\u3067\u3059\u3002\u60f3\u5b9a\u5916\u306e\u5165\u529b\u306b\u5bfe\u3057\u3066\u3082\u30b7\u30b9\u30c6\u30e0\u304c\u9069\u5207\u306b\u52d5\u4f5c\u3059\u308b\u3053\u3068\u3092\u78ba\u8a8d\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n
\u3053\u308c\u30897\u3064\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u3092\u65e5\u3005\u306e\u958b\u767a\u306b\u53d6\u308a\u5165\u308c\u308b\u3053\u3068\u3067\u3001PHP\u306e\u6bd4\u8f03\u6f14\u7b97\u5b50\u306b\u95a2\u9023\u3059\u308b\u30d0\u30b0\u3092\u5927\u5e45\u306b\u6e1b\u3089\u3057\u3001\u3088\u308a\u5805\u7262\u3067\u4fdd\u5b88\u3057\u3084\u3059\u3044\u30b3\u30fc\u30c9\u3092\u66f8\u304f\u3053\u3068\u304c\u3067\u304d\u308b\u3067\u3057\u3087\u3046\u3002<\/p>\n\n\n\n
\u307e\u3068\u3081\uff1aPHP\u6bd4\u8f03\u6f14\u7b97\u5b50\u3092\u4f7f\u3044\u3053\u306a\u3057\u3066\u6b21\u306e\u30ec\u30d9\u30eb\u3078<\/h2>\n\n\n\n
\u672c\u8a18\u4e8b\u3067\u306f\u3001PHP\u306e\u6bd4\u8f03\u6f14\u7b97\u5b50\u306b\u3064\u3044\u3066\u57fa\u672c\u304b\u3089\u5fdc\u7528\u307e\u3067\u5e45\u5e83\u304f\u89e3\u8aac\u3057\u3066\u304d\u307e\u3057\u305f\u3002\u7b49\u4fa1\u6f14\u7b97\u5b50\uff08==\uff09\u3068\u53b3\u5bc6\u7b49\u4fa1\u6f14\u7b97\u5b50\uff08===\uff09\u306e\u9055\u3044\u3001PHP\u306e\u578b\u5909\u63db\u306e\u4ed5\u7d44\u307f\u3001\u6bd4\u8f03\u6f14\u7b97\u5b50\u306e\u8aa4\u7528\u304c\u3082\u305f\u3089\u3059\u30d0\u30b0\u3084\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u30ea\u30b9\u30af\u3001\u305d\u3057\u3066\u5b9f\u8df5\u7684\u306a\u4f7f\u3044\u3053\u306a\u3057\u65b9\u3084\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u3092\u5b66\u3073\u307e\u3057\u305f\u3002\u3053\u308c\u3089\u306e\u77e5\u8b58\u306f\u3001\u3088\u308a\u5805\u7262\u3067\u4fdd\u5b88\u6027\u306e\u9ad8\u3044PHP\u30b3\u30fc\u30c9\u3092\u66f8\u304f\u305f\u3081\u306e\u57fa\u76e4\u3068\u306a\u308b\u306f\u305a\u3067\u3059\u3002<\/p>\n\n\n\n
\u672c\u8a18\u4e8b\u3067\u5b66\u3093\u3060PHP\u6bd4\u8f03\u6f14\u7b97\u5b50\u306e\u77e5\u8b58\u3092\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3067\u6d3b\u304b\u3059\u305f\u3081\u306b<\/h3>\n\n\n\n
\u3053\u308c\u307e\u3067\u5b66\u3093\u3060\u77e5\u8b58\u3092\u5b9f\u969b\u306e\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3067\u6d3b\u7528\u3059\u308b\u305f\u3081\u306b\u3001\u4ee5\u4e0b\u306e\u30a2\u30af\u30b7\u30e7\u30f3\u3092\u691c\u8a0e\u3057\u3066\u307f\u3066\u304f\u3060\u3055\u3044\uff1a<\/p>\n\n\n\n
\n
- \u30b3\u30fc\u30c9\u30d9\u30fc\u30b9\u306e\u76e3\u67fb<\/strong>: \u65e2\u5b58\u306e\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u30b3\u30fc\u30c9\u3092\u898b\u76f4\u3057\u3001\u5371\u967a\u306a\u6bd4\u8f03\u6f14\u7b97\u5b50\u306e\u4f7f\u7528\u30d1\u30bf\u30fc\u30f3\u304c\u306a\u3044\u304b\u78ba\u8a8d\u3057\u307e\u3057\u3087\u3046\u3002\u7279\u306b\u30e6\u30fc\u30b6\u30fc\u5165\u529b\u306e\u51e6\u7406\u3084\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u306b\u95a2\u308f\u308b\u90e8\u5206\u304b\u3089\u59cb\u3081\u308b\u3068\u3088\u3044\u3067\u3057\u3087\u3046\u3002<\/li>\n\n\n\n
- \u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u898f\u7d04\u306e\u7b56\u5b9a<\/strong>: \u30c1\u30fc\u30e0\u3067\u958b\u767a\u3057\u3066\u3044\u308b\u5834\u5408\u306f\u3001\u6bd4\u8f03\u6f14\u7b97\u5b50\u306e\u4f7f\u7528\u306b\u95a2\u3059\u308b\u30ac\u30a4\u30c9\u30e9\u30a4\u30f3\u3092\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u898f\u7d04\u306b\u8ffd\u52a0\u3057\u307e\u3057\u3087\u3046\u3002\u4f8b\u3048\u3070\u300c\u30e6\u30fc\u30b6\u30fc\u5165\u529b\u306e\u6bd4\u8f03\u306b\u306f\u5fc5\u305a===\u3092\u4f7f\u7528\u3059\u308b\u300d\u3068\u3044\u3063\u305f\u30eb\u30fc\u30eb\u3092\u660e\u6587\u5316\u3057\u307e\u3059\u3002<\/li>\n\n\n\n
- \u81ea\u52d5\u5316\u30c6\u30b9\u30c8\u306e\u62e1\u5145<\/strong>: \u6bd4\u8f03\u6f14\u7b97\u5b50\u306e\u6319\u52d5\u306b\u95a2\u3059\u308b\u30a8\u30c3\u30b8\u30b1\u30fc\u30b9\u3092\u30ab\u30d0\u30fc\u3059\u308b\u30e6\u30cb\u30c3\u30c8\u30c6\u30b9\u30c8\u3092\u8ffd\u52a0\u3057\u307e\u3057\u3087\u3046\u3002\u7279\u306b\u578b\u5909\u63db\u304c\u767a\u751f\u3057\u3046\u308b\u30b7\u30ca\u30ea\u30aa\u3092\u30c6\u30b9\u30c8\u3059\u308b\u3053\u3068\u3067\u3001\u6f5c\u5728\u7684\u306a\u30d0\u30b0\u3092\u65e9\u671f\u306b\u767a\u898b\u3067\u304d\u307e\u3059\u3002<\/li>\n\n\n\n
- \u30b3\u30fc\u30c9\u30ec\u30d3\u30e5\u30fc\u306e\u91cd\u70b9\u9805\u76ee<\/strong>: \u30b3\u30fc\u30c9\u30ec\u30d3\u30e5\u30fc\u6642\u306b\u6bd4\u8f03\u6f14\u7b97\u5b50\u306e\u4f7f\u7528\u3092\u91cd\u70b9\u7684\u306b\u30c1\u30a7\u30c3\u30af\u3059\u308b\u7fd2\u6163\u3092\u3064\u3051\u307e\u3057\u3087\u3046\u3002\u9069\u5207\u306a\u6f14\u7b97\u5b50\u304c\u9078\u629e\u3055\u308c\u3066\u3044\u308b\u304b\u3001\u578b\u306e\u6271\u3044\u306b\u4e00\u8cab\u6027\u304c\u3042\u308b\u304b\u3092\u78ba\u8a8d\u3057\u307e\u3059\u3002<\/li>\n\n\n\n
- \u30ea\u30d5\u30a1\u30af\u30bf\u30ea\u30f3\u30b0\u306e\u5b9f\u65bd<\/strong>: \u5b66\u3093\u3060\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u306b\u57fa\u3065\u3044\u3066\u3001\u554f\u984c\u306e\u3042\u308b\u30b3\u30fc\u30c9\u3092\u6bb5\u968e\u7684\u306b\u30ea\u30d5\u30a1\u30af\u30bf\u30ea\u30f3\u30b0\u3057\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002\u7279\u306b\u91cd\u8981\u306a\u30d3\u30b8\u30cd\u30b9\u30ed\u30b8\u30c3\u30af\u3084\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u95a2\u9023\u306e\u90e8\u5206\u304b\u3089\u512a\u5148\u7684\u306b\u6539\u5584\u3057\u307e\u3059\u3002<\/li>\n<\/ol>\n\n\n\n
\u6bd4\u8f03\u6f14\u7b97\u5b50\u306e\u7406\u89e3\u3092\u6df1\u3081\u308b\u305f\u3081\u306e\u6b21\u306e\u30b9\u30c6\u30c3\u30d7\u3068\u5b66\u7fd2\u30ea\u30bd\u30fc\u30b9<\/h3>\n\n\n\n
PHP\u6bd4\u8f03\u6f14\u7b97\u5b50\u306e\u7406\u89e3\u3092\u3055\u3089\u306b\u6df1\u3081\u308b\u305f\u3081\u306e\u30ea\u30bd\u30fc\u30b9\u3084\u30b9\u30c6\u30c3\u30d7\u3092\u3044\u304f\u3064\u304b\u7d39\u4ecb\u3057\u307e\u3059\uff1a<\/p>\n\n\n\n
\n
- PHP\u30de\u30cb\u30e5\u30a2\u30eb<\/strong>: PHP\u516c\u5f0f\u30de\u30cb\u30e5\u30a2\u30eb\u306e\u6bd4\u8f03\u6f14\u7b97\u5b50\u30bb\u30af\u30b7\u30e7\u30f3<\/a>\u306f\u5e38\u306b\u6700\u65b0\u306e\u60c5\u5831\u304c\u53cd\u6620\u3055\u308c\u308b\u4fe1\u983c\u3067\u304d\u308b\u30ea\u30bd\u30fc\u30b9\u3067\u3059\u3002<\/li>\n\n\n\n
- \u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u95a2\u9023\u306e\u5b66\u7fd2<\/strong>: OWASP PHP Security Cheat Sheet<\/a>\u3067\u306f\u3001PHP\u306b\u304a\u3051\u308b\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u3092\u5b66\u3079\u307e\u3059\u3002<\/li>\n\n\n\n
- \u9759\u7684\u89e3\u6790\u30c4\u30fc\u30eb<\/strong>: PHPStan\u3001PHP_CodeSniffer\u3001PHP Mess Detector\u306a\u3069\u306e\u30c4\u30fc\u30eb\u3092\u5c0e\u5165\u3059\u308b\u3068\u3001\u6bd4\u8f03\u6f14\u7b97\u5b50\u306e\u4e0d\u9069\u5207\u306a\u4f7f\u7528\u3092\u81ea\u52d5\u7684\u306b\u691c\u51fa\u3067\u304d\u307e\u3059\u3002<\/li>\n\n\n\n
- \u578b\u30b7\u30b9\u30c6\u30e0\u306e\u7406\u89e3<\/strong>: PHP 7\u4ee5\u964d\u3067\u5f37\u5316\u3055\u308c\u305f\u578b\u30b7\u30b9\u30c6\u30e0\u306b\u3064\u3044\u3066\u5b66\u3076\u3053\u3068\u3067\u3001\u6bd4\u8f03\u6f14\u7b97\u5b50\u306e\u52d5\u4f5c\u3092\u3088\u308a\u6df1\u304f\u7406\u89e3\u3067\u304d\u307e\u3059\u3002\u7279\u306b\u578b\u5ba3\u8a00\u3084\u623b\u308a\u5024\u306e\u578b\u6307\u5b9a\u306f\u3001\u578b\u95a2\u9023\u306e\u30d0\u30b0\u3092\u672a\u7136\u306b\u9632\u3050\u306e\u306b\u5f79\u7acb\u3061\u307e\u3059\u3002<\/li>\n\n\n\n
- \u30c7\u30b6\u30a4\u30f3\u30d1\u30bf\u30fc\u30f3\u306e\u5b66\u7fd2<\/strong>: Strategy\u30d1\u30bf\u30fc\u30f3\u3084 Factory Method\u30d1\u30bf\u30fc\u30f3\u306a\u3069\u3001\u30c7\u30b6\u30a4\u30f3\u30d1\u30bf\u30fc\u30f3\u3092\u5b66\u3076\u3053\u3068\u3067\u3001\u6bd4\u8f03\u30ed\u30b8\u30c3\u30af\u3092\u3088\u308a\u6d17\u7df4\u3055\u308c\u305f\u5f62\u3067\u5b9f\u88c5\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/li>\n\n\n\n
- \u66f8\u7c4d\u300cPHP 7 Zend Certification Study Guide\u300d<\/strong>: PHP Zend\u8a8d\u5b9a\u8a66\u9a13\u306e\u5bfe\u7b56\u66f8\u3067\u3059\u304c\u3001PHP\u306e\u6df1\u3044\u7406\u89e3\u306b\u3064\u306a\u304c\u308b\u826f\u66f8\u3067\u3059\u3002<\/li>\n<\/ol>\n\n\n\n
PHP\u306e\u6bd4\u8f03\u6f14\u7b97\u5b50\u3092\u4f7f\u3044\u3053\u306a\u305b\u308b\u3088\u3046\u306b\u306a\u308b\u3053\u3068\u306f\u3001\u5358\u306a\u308b\u69cb\u6587\u306e\u554f\u984c\u3092\u8d85\u3048\u3066\u3001\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306e\u672c\u8cea\u7684\u306a\u90e8\u5206\u2014\u30c7\u30fc\u30bf\u306e\u610f\u5473\u3068\u305d\u306e\u6271\u3044\u65b9\u2014\u3078\u306e\u7406\u89e3\u3092\u6df1\u3081\u308b\u3053\u3068\u306b\u3064\u306a\u304c\u308a\u307e\u3059\u3002\u672c\u8a18\u4e8b\u304c\u7686\u3055\u3093\u306ePHP\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u30b9\u30ad\u30eb\u5411\u4e0a\u306e\u4e00\u52a9\u3068\u306a\u308c\u3070\u5e78\u3044\u3067\u3059\u3002<\/p>\n\n\n\n
\u3053\u308c\u304b\u3089\u3082\u5b9f\u8df5\u3092\u901a\u3058\u3066\u77e5\u8b58\u3092\u78e8\u304d\u3001\u3088\u308a\u5805\u7262\u3067\u4fdd\u5b88\u6027\u306e\u9ad8\u3044PHP\u30b3\u30fc\u30c9\u3092\u66f8\u3044\u3066\u3044\u3063\u3066\u304f\u3060\u3055\u3044\u3002\u6bd4\u8f03\u6f14\u7b97\u5b50\u306e\u9069\u5207\u306a\u4f7f\u7528\u306f\u3001\u305d\u306e\u305f\u3081\u306e\u91cd\u8981\u306a\u4e00\u6b69\u3068\u306a\u308b\u3067\u3057\u3087\u3046\u3002<\/p>\n\n\n\n
<\/p>\n","protected":false},"excerpt":{"rendered":"
PHP\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306b\u304a\u3044\u3066\u3001\u6bd4\u8f03\u6f14\u7b97\u5b50\u306f\u6761\u4ef6\u5206\u5c90\u3084\u30c7\u30fc\u30bf\u691c\u8a3c\u306e\u6839\u5e79\u3092\u62c5\u3046\u91cd\u8981\u306a\u8981\u7d20\u3067\u3059\u3002\u3057\u304b\u3057\u3001\u305d\u306e\u6319\u52d5\u3092\u6b63\u78ba\u306b\u7406\u89e3\u3057\u3066\u3044\u306a\u3044\u3068\u3001\u4e88\u671f\u305b\u306c\u30d0\u30b0\u3084\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u8106\u5f31\u6027\u306e\u539f\u56e0\u3068\u306a\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002\u672c\u8a18\u4e8b\u3067\u306f\u3001PHP\u306e9\u3064\u306e\u6bd4 … <\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[12,63],"tags":[],"class_list":{"0":"post-3786","1":"post","2":"type-post","3":"status-publish","4":"format-standard","6":"category-php","7":"category-php-syntax","8":"nothumb"},"_links":{"self":[{"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=\/wp\/v2\/posts\/3786","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=3786"}],"version-history":[{"count":1,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=\/wp\/v2\/posts\/3786\/revisions"}],"predecessor-version":[{"id":3787,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=\/wp\/v2\/posts\/3786\/revisions\/3787"}],"wp:attachment":[{"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=3786"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=3786"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=3786"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}