{"id":4278,"date":"2021-02-21T11:26:24","date_gmt":"2021-02-21T02:26:24","guid":{"rendered":"https:\/\/column.prime-strategy.co.jp\/?p=4278"},"modified":"2026-02-17T02:10:44","modified_gmt":"2026-02-16T17:10:44","slug":"post-4278","status":"publish","type":"post","link":"https:\/\/kusanagi.tokyo\/column\/archives\/column_4278","title":{"rendered":"PHP\u91cd\u93ae\u306e\u5ee3\u5ddd\u985e\u6c0f\u306e\u30b3\u30e9\u30e0\u300cPHP\u306e\u6700\u65b0\u72b6\u6cc1\uff1aPHP 8.1\u958b\u767a\u30b9\u30bf\u30fc\u30c8\uff08\u7b2c16\u56de\uff09\u300d\u3092\u516c\u958b\u3057\u307e\u3057\u305f\u3002"},"content":{"rendered":"\n

2020\u5e7411\u670826\u65e5\u306b5\u5e74\u3076\u308a\u306e\u30e1\u30b8\u30e3\u30fc\u30d0\u30fc\u30b8\u30e7\u30f3\u30a2\u30c3\u30d7\u3068\u3057\u3066PHP 8.0.0\u304c\u30ea\u30ea\u30fc\u30b9\u3055\u308c\uff0c\u65e9\u304f\u30823\u304b\u6708\u304c\u305f\u3068\u3046\u3068\u3057\u3066\u3044\u307e\u3059\uff0ePHP 8.0\u306e\u30d0\u30b0\u4fee\u6b63\u7248\u304c\u5f93\u6765\u3068\u540c\u69d8\u306b\u6708\u4e00\u56de\u306e\u30da\u30fc\u30b9\u3067\u30ea\u30ea\u30fc\u30b9\u3055\u308c\u3066\u304a\u308a\uff0c\u672c\u7a3f\u57f7\u7b46\u6642\u70b9\u3067\u6700\u65b0\u306e\u30d0\u30fc\u30b8\u30e7\u30f3\u306f2021\u5e742\u67084\u65e5\u306b\u30ea\u30ea\u30fc\u30b9\u3055\u308c\u305fPHP 8.0.2\u3068\u306a\u3063\u3066\u3044\u307e\u3059\uff0e\u4e00\u65b9\uff0c\u6b21\u671f\u30de\u30a4\u30ca\u30fc\u30ea\u30ea\u30fc\u30b9\u306b\u3042\u305f\u308b PHP 8.1\u306e\u958b\u767a\u3082\u672c\u683c\u7684\u306b\u958b\u59cb\u3055\u308c\u3066\u3044\u307e\u3059\uff0ePHP 8.1\u306b\u304a\u3044\u3066\u306f\u6bd4\u8f03\u7684\u30de\u30a4\u30ca\u30fc\u306a\u6a5f\u80fd\u5f37\u5316\u304c\u884c\u308f\u308c\u308b\u3068\u60f3\u5b9a\u3055\u308c\u3066\u304a\u308a\uff0c\u958b\u767a\u304c\u9806\u8abf\u306b\u884c\u3051\u3070\u4eca\u5e74(2021\u5e74)\u306e11\u6708\u672b\u9803\u306b\u30ea\u30ea\u30fc\u30b9\u3055\u308c\u308b\u4e88\u5b9a\u3067\u3059\uff0ePHP 8.1\u306b\u304a\u3051\u308b\u5909\u66f4\u70b9\u306f\u307e\u3060\u78ba\u5b9a\u3057\u3066\u3044\u307e\u305b\u3093\u304c\uff0c\u672c\u7a3f\u3067\u306f\u73fe\u6642\u70b9\u3067\u63a1\u7528\u3055\u308c\u308b\u4e88\u5b9a\u306e\u6a5f\u80fd\u306e\u4e00\u90e8\u306b\u3064\u3044\u3066\u7d39\u4ecb\u3057\u307e\u3059\uff0e<\/p>\n\n\n\n

<\/span>\u6587\u5b57\u5217\u30ad\u30fc\u306b\u3088\u308b\u914d\u5217\u5c55\u958b<\/strong><\/strong><\/span><\/h2>\n\n\n\n

\u3000PHP 7.4\u306b\u304a\u3044\u3066\u306f\uff0c\u914d\u5217\u5c55\u958b\u7528\u306e\u6f14\u7b97\u5b50\uff08\u201d...\u201d\uff09\u304c\u8ffd\u52a0\u3055\u308c\u307e\u3057\u305f\uff0e\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u914d\u5217\u5b9a\u7fa9\u306e\u4e2d\u3067\u30c9\u30c3\u30c8\uff13\u500b\uff08\u201d...\u201d\uff09\u306e\u5f8c\u306b\u914d\u5217\u5909\u6570\u3092\u8a18\u8ff0\u3059\u308b\u3068\uff0c\u914d\u5217\u306e\u8981\u7d20\u304c\u81ea\u52d5\u7684\u306b\u5c55\u958b\u3055\u308c\u307e\u3059\uff0e\u4ee5\u4e0b\u306e\u4f8b\u3067\u306f\uff0c\u914d\u5217$x\u306e\u5b9a\u7fa9\u306b\u304a\u3044\u3066\u914d\u5217$a\uff0c$b\u306e\u8981\u7d20\u3092\u5c55\u958b\u3057\u3066\u3044\u307e\u3059\uff0e<\/p>\n\n\n\n

$a=[1,2];<\/p>\n\n\n\n

$b=[3,4,5];<\/p>\n\n\n\n

$x=[0,...$a,...$b,6]; \/\/ [0,1,2,3,4,5,6]<\/p>\n\n\n\n

\u3000\u3053\u306e\u6a5f\u80fd\u306f\u65e2\u5b58\u306e\u914d\u5217\u306e\u8981\u7d20\u3092\u7528\u3044\u3066\uff0c\u65b0\u305f\u306a\u914d\u5217\u3092\u5b9a\u7fa9\u3059\u308b\u969b\u306b\u6709\u7528\u3067\u3059\u304c\uff0cPHP 7.4\u3067\u306f\u6570\u5024\u3092\u6dfb\u5b57\u3068\u3059\u308b\u914d\u5217\u306e\u307f\u3067\u3057\u304b\u5229\u7528\u3067\u304d\u306a\u3044\u3068\u3044\u3046\u5236\u7d04\u304c\u3042\u308a\u307e\u3057\u305f\uff0e<\/p>\n\n\n\n

\u3000PHP 8.1\u3067\u306f\u3053\u306e\u6a5f\u80fd\u304c\u62e1\u5f35\u3055\u308c\uff0c\u6587\u5b57\u5217\u3092\u6dfb\u5b57\u3068\u3059\u308b\u9023\u60f3\u914d\u5217\u306b\u3064\u3044\u3066\u3082\u201d...\u201d\u6f14\u7b97\u5b50\u306b\u3088\u308b\u5c55\u958b\u304c\u53ef\u80fd\u3068\u306a\u308a\u307e\u3059\uff0e\u4ee5\u4e0b\u306e\u4f8b\u3067\u306f\uff0c\u914d\u5217$x\u306e\u5b9a\u7fa9\u306b\u304a\u3044\u3066\u914d\u5217$a\uff0c$b\u306e\u8981\u7d20\u3092\u5c55\u958b\u3057\u3066\u3044\u307e\u3059\uff0e<\/p>\n\n\n\n

$a=[\u201ca\u201d=>1,\u201db\u201d=>0];<\/p>\n\n\n\n

$b=[\u201cb\u201d=>2];<\/p>\n\n\n\n

$x=[\u201ca\u201d=>0,...$a,...$b]; \/\/ [\u201ca\u201d=>1,\u201db\u201d=>2]<\/p>\n\n\n\n

 \u3053\u306e\u969b\uff0c\u5404\u6dfb\u5b57\u306b\u8907\u6570\u56de\u5024\u304c\u6307\u5b9a\u3055\u308c\u305f\u5834\u5408\uff0c\u5de6\u304b\u3089\u9806\u756a\u306b\u89e3\u91c8\u3055\u308c\uff0c\u6700\u5f8c\u306b\u6307\u5b9a\u3055\u308c\u305f\u5024\u304c\u6700\u7d42\u7684\u306a\u5024\u3068\u306a\u308a\u307e\u3059\uff0e\u3053\u306e\u4f8b\u3067\u306f\uff0c\u914d\u5217$x\u3092\u5b9a\u7fa9\u3059\u308b\u969b\uff0c\u6dfb\u5b57\u201da\u201d\u306e\u5024\u3068\u3057\u3066\u6700\u521d0\u304c\u4ee3\u5165\u3055\u308c\u307e\u3059\u304c\uff0c\u914d\u5217$a\u306e\u8981\u7d20\u3092\u4ee3\u5165\u3057\u305f\u969b\u306b\u5024\u304c1\u306b\u66f4\u65b0\u3055\u308c\u307e\u3059\uff0e\u6dfb\u5b57\u201db\u201d\u306e\u5024\u306b\u3064\u3044\u3066\u3082\uff0c\u914d\u5217$a\u3092\u5c55\u958b\u3057\u305f\u969b\u306b0\u304c\u4ee3\u5165\u3055\u308c\u307e\u3059\u304c\uff0c\u914d\u5217$b\u3092\u5c55\u958b\u3057\u305f\u969b\u306b2\u306b\u66f4\u65b0\u3055\u308c\u307e\u3059\uff0e<\/p>\n\n\n\n

<\/span>8<\/strong>\u9032\u6570\u30ea\u30c6\u30e9\u30eb\u8868\u8a18<\/strong><\/strong><\/span><\/h2>\n\n\n\n

 \u5f93\u6765\uff0c0\u3067\u59cb\u307e\u308b\u6570\u5024\uff08\u4f8b\u3048\u3070012\uff09\u306f\uff18\u9032\u6570\u3068\u3057\u3066\u89e3\u91c8\u3055\u308c\u3066\u3044\u307e\u3057\u305f\uff0e\u4e00\u65b9\uff0c2\u9032\u6570\u308416\u9032\u6570\u306f0b0110\u30840x7F\u306e\u3088\u3046\u306b\u8868\u8a18\u3055\u308c\u307e\u3059\uff0ePHP 8.1\u3067\u306f\uff0c8\u9032\u6570\u306b\u304a\u3044\u3066\u30822\u9032\u6570\u308416\u9032\u6570\u306b\u985e\u4f3c\u306e\u8868\u8a18\u304c\u3067\u304d\u308b\u3088\u3046\u306b\u6a5f\u80fd\u304c\u62e1\u5f35\u3055\u308c\u307e\u3059\uff0e\u5177\u4f53\u7684\u306b\u306f\uff0c\u5f93\u6765\u306e012\uff0810\u9032\u6570\u306710\uff09\u306f0o12\uff08\u307e\u305f\u306f0O12\uff09\u306e\u3088\u3046\u306b\u8a18\u8ff0\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\uff0e\u5f93\u6765\u306e012\u306e\u3088\u3046\u306a\uff18\u9032\u6570\u8868\u8a18\u306f\u6642\u306b\u30d7\u30ed\u30b0\u30e9\u30e0\u304c\u610f\u56f3\u305b\u305a\u306b8\u9032\u6570\u3068\u89e3\u91c8\u3055\u308c\u3066\u3057\u307e\u3046\u306a\u3069\u306e\u6df7\u4e71\u3092\u767a\u751f\u3059\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3057\u305f\u304c\uff0c\u65b0\u898f\u306b\u5c0e\u5165\u3055\u308c\u308b\u8868\u8a18\u3067\u306f\u660e\u793a\u7684\u306b\u533a\u5225\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\uff0e<\/p>\n\n\n\n

<\/span>array_is_list<\/strong>\u95a2\u6570<\/strong><\/strong><\/span><\/h2>\n\n\n\n

 PHP\u306b\u304a\u3044\u3066\u306f\uff0c\u914d\u5217\u3068\u3057\u3066\uff0c\u6570\u5024\u6dfb\u5b57\u306e\u307f\u3092\u6709\u3059\u308b\u30ea\u30b9\u30c8\u3068\uff0c\u6587\u5b57\u5217\u3092\u6dfb\u5b57\u3068\u3059\u308b\u9023\u60f3\u914d\u5217\u3092\u5b9a\u7fa9\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\uff0e\u3053\u3053\u3067\uff0c\u6570\u5024\u6dfb\u5b57\u306e\u5834\u5408\u3067\u3082\u6dfb\u5b57\u306e\u9806\u756a\u304c\u9006\u3067\u3042\u3063\u305f\u308a\uff0c\u629c\u3051\u3066\u3044\u308b\u5834\u5408\u306b\u306f\u30ea\u30b9\u30c8\u3068\u3057\u3066\u5b9a\u7fa9\u3055\u308c\u306a\u3044\u3053\u3068\u306b\u6ce8\u610f\u3057\u3066\u304f\u3060\u3055\u3044\uff0e\u3053\u308c\u3089\u306e\u533a\u5225\u306fPHP\u306b\u3088\u308a\u81ea\u52d5\u7684\u306b\u884c\u308f\u308c\u307e\u3059\u304c\uff0c\u30d7\u30ed\u30b0\u30e9\u30de\u304c\u610f\u56f3\u305b\u305a\u306b\u30ea\u30b9\u30c8\u304c\u9023\u60f3\u914d\u5217\u3068\u3057\u3066\u5b9a\u7fa9\u3055\u308c\u308b\u3053\u3068\u3082\u3042\u308a\u307e\u3057\u305f\uff0e<\/p>\n\n\n\n

 PHP 8.1\u3067\u306f\u914d\u5217\u306e\u30ea\u30b9\u30c8\u3067\u3042\u308b\u3053\u3068\u3092\u5224\u5225\u3059\u308b\u95a2\u6570array_is_list()\u304c\u5c0e\u5165\u3055\u308c\u307e\u3059\uff0e\u4f8b\u3048\u3070\uff0c\u4ee5\u4e0b\u306e\u30b3\u30fc\u30c9\u3092\u898b\u3066\u307f\u307e\u3057\u3087\u3046\uff0e<\/p>\n\n\n\n

--<\/p>\n\n\n\n

<?php<\/p>\n\n\n\n

$x = ['b','a'];<\/p>\n\n\n\n

var_export(array_is_list($x)); \/\/ true<\/p>\n\n\n\n

$x = [0=>'b',1=>'a'];<\/p>\n\n\n\n

var_export(array_is_list($x)); \/\/ true<\/p>\n\n\n\n

$x = [1=>'a',0=>'b'];<\/p>\n\n\n\n

var_export(array_is_list($x)); \/\/ false<\/p>\n\n\n\n

--<\/p>\n\n\n\n

\u30001\u756a\u76ee\u306f\u914d\u5217\u306e\u5b9a\u7fa9\u6642\u306b\u6dfb\u5b57\u304c\u6307\u5b9a\u3055\u308c\u3066\u3044\u306a\u3044\u305f\u3081\uff0c\u81ea\u52d5\u7684\u306b\u6570\u5024\u6dfb\u5b57\uff080\u304a\u3088\u30731\uff09\u304c\u5272\u308a\u3064\u3051\u3089\u308c\u307e\u3059\uff0e\uff12\u756a\u76ee\u306e\u4f8b\u306f\u6570\u5024\u306e\u6dfb\u5b57\u3092\u660e\u793a\u7684\u306b0\u304b\u3089\u9806\u756a\u306b\u6307\u5b9a\u3057\u3066\u3044\u307e\u3059\uff0e\u3053\u308c\u3089\u306e\u4e8c\u3064\u306e\u4f8b\u3067\u306f\u914d\u5217\u306f\u30ea\u30b9\u30c8\u3068\u3057\u3066\u5b9a\u7fa9\u3055\u308c\u308b\u305f\u3081\uff0carray_is_list()\u95a2\u6570\u306e\u623b\u308a\u5024\u306ftrue\u3068\u306a\u308a\u307e\u3059\uff0e<\/p>\n\n\n\n

\u3000\u4e00\u65b9\uff0c3\u756a\u76ee\u306e\u4f8b\u3067\u306f\uff0c\u6570\u5024\u6dfb\u5b57\u3092\u9006\u9806\u306b\u5b9a\u7fa9\u3057\u3066\u3044\u308b\u305f\u3081\uff0c\u30ea\u30b9\u30c8\u3068\u3057\u3066\u306f\u4f5c\u6210\u3055\u308c\u305a\uff0carray_is_list()\u95a2\u6570\u306e\u623b\u308a\u5024\u306ffalse\u3068\u306a\u308a\u307e\u3059\uff0e<\/p>\n\n\n\n

<\/span>$GLOBALS<\/strong>\u5909\u6570\u306b\u95a2\u3059\u308b\u5229\u7528\u5236\u7d04<\/strong><\/span><\/h2>\n\n\n\n

\u3000$GLOBALS\u5909\u6570\u306f\uff0cPHP\u5185\u90e8\u306e\u30b0\u30ed\u30fc\u30d0\u30eb\u5909\u6570\u7528\u30b7\u30f3\u30dc\u30eb\u30c6\u30fc\u30d6\u30eb\u3092\u76f4\u63a5\u53c2\u7167\u3059\u308b\u624b\u6bb5\u3068\u3057\u3066\u4f7f\u7528\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\uff0e\u4f8b\u3048\u3070\uff0c\u4ee5\u4e0b\u306e\u30b3\u30fc\u30c9\u306f\u30b0\u30ed\u30fc\u30d0\u30eb\u5909\u6570\u3078\u306e\u901a\u5e38\u306e\u4ee3\u5165\uff08$a=1\uff09\u3068\u540c\u3058\u52b9\u679c\u304c\u3042\u308a\u307e\u3059\uff0e<\/p>\n\n\n\n

$GLOBALS[\u2018a\u2019]=1<\/p>\n\n\n\n

\u3000\u30b0\u30ed\u30fc\u30d0\u30eb\u5909\u6570\u306fPHP\u30b9\u30af\u30ea\u30d7\u30c8\u306e\u4e2d\u306b\u304a\u3044\u3066\u5bb9\u6613\u306b\u53c2\u7167\u3067\u304d\u308b\u305f\u3081\uff0c\u3053\u306e\u6a5f\u80fd\u3092\u660e\u793a\u7684\u306b\u4f7f\u7528\u3059\u308b\u30b3\u30fc\u30c9\u3092\u5404\u6a5f\u4f1a\u306f\u5c11\u306a\u3044\u3068\u601d\u308f\u308c\u307e\u3059\u304c\uff0c\u904e\u53bb\u306e\u30b3\u30fc\u30c9\u306e\u4e2d\u306b\u306f\u3053\u306e\u6a5f\u80fd\u3092\u5229\u7528\u3057\u3066\u3044\u308b\u3082\u306e\u304c\u3042\u308a\u307e\u3059\uff0e\u3053\u306e$GLOBALS\u5909\u6570\u306b\u95a2\u3059\u308b\u30a2\u30af\u30bb\u30b9\u306f\u30b0\u30ed\u30fc\u30d0\u30eb\u5909\u6570\u306e\u30b7\u30f3\u30dc\u30eb\u30c6\u30fc\u30d6\u30eb\u3092\u53c2\u7167\u3059\u308b\u305f\u3081\uff0c\u64cd\u4f5c\u306b\u3088\u3063\u3066\u306f\u5b9f\u884c\u6027\u80fd\u306e\u4f4e\u4e0b\u3092\u62db\u304f\u61f8\u5ff5\u304c\u3042\u308a\u307e\u3059\uff0e\u3053\u306e\u305f\u3081\uff0cPHP 8.1\u3067\u306f$GLOBALS\u5909\u6570\u3078\u306e\u30a2\u30af\u30bb\u30b9\u306e\u4e00\u90e8\u3092\u5236\u9650\u3059\u308b\u3053\u3068\u306b\u3057\u307e\u3057\u305f\uff0e\u5177\u4f53\u7684\u306b\u306f\uff0c\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u30b3\u30fc\u30c9\u3092\u5b9f\u884c\u3059\u308b\u3068\u30b3\u30f3\u30d1\u30a4\u30eb\u6642\u306b\u81f4\u547d\u7684\u306a\u30a8\u30e9\u30fc\u3092\u767a\u751f\u3059\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\uff0e<\/p>\n\n\n\n

$GLOBALS = [];<\/p>\n\n\n\n

$GLOBALS += [];<\/p>\n\n\n\n

$GLOBALS =& $x;<\/p>\n\n\n\n

$x =& $GLOBALS;<\/p>\n\n\n\n

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