{"id":4532,"date":"2021-08-29T19:31:47","date_gmt":"2021-08-29T10:31:47","guid":{"rendered":"https:\/\/column.prime-strategy.co.jp\/?p=4532"},"modified":"2026-02-17T02:10:44","modified_gmt":"2026-02-16T17:10:44","slug":"post-4532","status":"publish","type":"post","link":"https:\/\/kusanagi.tokyo\/column\/archives\/column_4532","title":{"rendered":"PHP\u91cd\u93ae\u306e\u5ee3\u5ddd\u985e\u6c0f\u306b\u3088\u308b\u30b3\u30e9\u30e0\u300cPHP\u306e\u6700\u65b0\u72b6\u6cc1\uff1aPHP 8.1\u306e\u958b\u767a\u304c\u3044\u3088\u3044\u3088\u6700\u7d42\u6bb5\u968e\u306b\uff08\u7b2c19\u56de\uff09\u300d"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">\u590f\u3082\u305d\u308d\u305d\u308d\u7d42\u308f\u308b\u9803\u3068\u306a\u308a\u307e\u3057\u305f\u304c\uff0c\u6b21\u671f\u30de\u30a4\u30ca\u30fc\u30d0\u30fc\u30b8\u30e7\u30f3\u30a2\u30c3\u30d7\u3068\u306a\u308bPHP\u30d0\u30fc\u30b8\u30e7\u30f38.1\u306e\u958b\u767a\u306f\u8a08\u753b\u901a\u308a\u9806\u8abf\u306b\u9032\u3093\u3067\u304a\u308a\uff0c7\u670820\u65e5\u306b\u30d5\u30a3\u30fc\u30c1\u30e3\u30fc\u30d5\u30ea\u30fc\u30ba\u3055\u308c\u305f\u5f8c\uff0c\u30d9\u30fc\u30bf\u7248\u304c\u30ea\u30ea\u30fc\u30b9\u3055\u308c\u3066\u3044\u307e\u3059\uff0e\u672c\u7a3f\u3067\u306f\uff0c\u524d\u56de\u306b\u5f15\u304d\u7d9a\u304dPHP 8.1\u306b\u304a\u3051\u308b\u5909\u66f4\u70b9\u306b\u3064\u3044\u3066\u7d39\u4ecb\u3057\u307e\u3059\uff0e<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"PHP_81%E3%81%AE%E9%96%8B%E7%99%BA%E3%82%B9%E3%82%B1%E3%82%B8%E3%83%A5%E3%83%BC%E3%83%AB\"><\/span>PHP 8.1\u306e\u958b\u767a\u30b9\u30b1\u30b8\u30e5\u30fc\u30eb<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">PHP 8.1\u306e\u958b\u767a\u3067\u306f\uff0c7\u670820\u306b\u30d5\u30a3\u30fc\u30c1\u30e3\u30fc\u30d5\u30ea\u30fc\u30ba\u304c\u884c\u308f\u308c\u305f\u5f8c\uff0c7\uff5e8\u6708\u306b\u30d9\u30fc\u30bf\u7248\uff0c\uff19\uff5e11\u6708\u306b\u30ea\u30ea\u30fc\u30b9\u5019\u88dc\u7248\u306e\u30ea\u30ea\u30fc\u30b9\u304c\u4e88\u5b9a\u3055\u308c\u3066\u3066\u3044\u307e\u3059\uff0e\u672c\u7a3f\u57f7\u7b46\u6642\u70b9\u3067\u306f\uff0c\u30d9\u30fc\u30bf\u7248\u306e\u6700\u7d42\u7248\u3067\u3042\u308b\u03b23\u7248\u304c\u6700\u65b0\u3068\u306a\u3063\u3066\u3044\u307e\u3059\uff0e\u958b\u767a\u304c\u9806\u8abf\u306b\u3044\u304f\u3068\uff0c\u6b63\u5f0f\u7248\u304c11\u670825\u65e5\u306b\u30ea\u30ea\u30fc\u30b9\u3055\u308c\u308b\u4e88\u5b9a\u3067\u3059\uff0e<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u672c\u7a3f\u3067\u306f\uff0cPHP 8.1\u3067\u8ffd\u52a0\u3055\u308c\u308b\u6a5f\u80fd\u3092\u5f15\u304d\u7d9a\u304d\u7d39\u4ecb\u3057\u307e\u3059\uff0e<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E4%BA%A4%E5%B7%AE%E5%9E%8B%E3%81%AE%E5%B0%8E%E5%85%A5\"><\/span>\u4ea4\u5dee\u578b\u306e\u5c0e\u5165<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">&nbsp;PHP 8.0\u3067\u306f\u5408\u4f75\u578b(Union)\u304c\u5c0e\u5165\u3055\u308c\u307e\u3057\u305f\uff0ePHP 8.1\u3067\u306f\u4ea4\u5dee\u578b(Intersection)\u304c\u5c0e\u5165\u3055\u308c\u307e\u3059\uff0eUnion\u3067\u306f\uff0c\u95a2\u6570\u30fb\u30e1\u30bd\u30c3\u30c9\u306e\u5f15\u6570\u307e\u305f\u306f\u623b\u308a\u5024\u306b\u8907\u6570\u306e\u578b\u306e\u5019\u88dc\u3092\u6307\u5b9a\u3067\u304d\u307e\u3059\uff0e\u8907\u6570\u306e\u578b\u306f\u8ad6\u7406\u548c\u3068\u540c\u69d8\u306b\u2019|\u2019\u3067\u631f\u3093\u3067\u6307\u5b9a\u3057\u307e\u3059\uff0e\u4e00\u65b9\uff0cIntersection\u306f\u8ad6\u7406\u7a4d\u306b\u76f8\u5f53\u3057\uff0c\u8907\u6570\u306e\u578b\u306b\u5171\u901a\u3059\u308b\u8981\u7d20\u3092\u2019&amp;\u2019\u3067\u631f\u3093\u3067\u6307\u5b9a\u3057\u307e\u3059\uff0e\u7c21\u5358\u306a\u4f8b\u3092\u898b\u3066\u307f\u307e\u3057\u3087\u3046\uff0e<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">--<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">&lt;?php<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">class Test {<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">&nbsp; private Traversable&amp;Countable $ci;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">&nbsp; public function setIterator(Traversable&amp;Countable $c) {<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">&nbsp;&nbsp;&nbsp;&nbsp; $this-&gt;ci = c;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">&nbsp; }<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">&nbsp; public function getIterator(): Traversable&amp;Countable {<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">&nbsp;&nbsp;&nbsp;&nbsp; return $this-&gt;ci;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">&nbsp; }<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">}<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">--<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u306e\u4f8b\u3067\u306f\uff0cTest\u30af\u30e9\u30b9\u306esetIterator\u30e1\u30bd\u30c3\u30c9\u306e\u5f15\u6570\u306e\u578b\uff0cgetIterator\u30e1\u30bd\u30c3\u30c9\u306e\u623b\u308a\u5024\u304a\u3088\u3073\u30d7\u30e9\u30a4\u30d9\u30fc\u30c8\u5909\u6570$ci\u306e\u578b\u3068\u3057\u3066\uff0cTraversable &amp; Countable \u3092\u6307\u5b9a\u3057\u3066\u3044\u307e\u3059\uff0e\u3053\u308c\u306f\uff0cTraversable\u304b\u3064Countable\u3067\u3042\u308b\u3053\u3068\u3092\u6307\u5b9a\u3057\u3066\u304a\u308a\uff0c\u3069\u3061\u3089\u304b\u7247\u65b9\u306e\u30af\u30e9\u30b9\u578b\uff08\u307e\u305f\u306f\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30a4\u30b9\uff09\u306e\u307f\u6709\u3059\u308b\u5834\u5408\u306f\u30a8\u30e9\u30fc\u3068\u306a\u308a\u307e\u3059\uff0e\u8907\u6570\u306e\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30a4\u30b9\u3092\u6307\u5b9a\u3059\u308b\u30b1\u30fc\u30b9\u306a\u3069\u3067\u306e\u5229\u7528\u304c\u60f3\u5b9a\u3055\u308c\u307e\u3059\uff0e<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">never\u578b<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">PHP 8.1\u3067\u306f\uff0c\u95a2\u6570\u304b\u3089\u51e6\u7406\u3092\u623b\u3055\u306a\u3044\u3053\u3068\u3092\u660e\u793a\u7684\u306b\u6307\u5b9a\u3059\u308b\u623b\u308a\u5024\u578b\u3068\u3057\u3066 never \u304c\u5c0e\u5165\u3055\u308c\u307e\u3059\uff0e\u3053\u308c\u306f\uff0c\u4f8b\u3048\u3070\uff0cHTTP\u30d8\u30c3\u30c0\u306e\u51fa\u529b\u3067\u30ea\u30c0\u30a4\u30ec\u30af\u30c8\u6307\u5b9a\u3092\u884c\u3063\u305f\u5f8c\uff0cPHP\u30b9\u30af\u30ea\u30d7\u30c8\u306e\u51e6\u7406\u3092\u7d42\u4e86\u3059\u308b\u30b1\u30fc\u30b9\u304c\u60f3\u5b9a\u3055\u308c\u307e\u3059\uff0e\u4ee5\u4e0b\u306b\u30ea\u30c0\u30a4\u30ec\u30af\u30c8\u51e6\u7406\u3092\u884c\u3046\u95a2\u6570\u306e\u4f8b\u3092\u793a\u3057\u307e\u3059\uff0e<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">--<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">&lt;?php<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">function redirect(string $uri): never {<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u3000header('Location:'.$uri);<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">&nbsp; exit();<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">}<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">--<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u623b\u308a\u5024\u578b\u3068\u3057\u3066\u201dnever\u201d\u3092\u6307\u5b9a\u3057\uff0c\u3053\u306e\u95a2\u6570\u304b\u3089\u51e6\u7406\u304c\u623b\u3089\u306a\u3044\u3053\u3068\u3092\u660e\u793a\u7684\u306b\u6307\u5b9a\u3057\u3066\u3044\u307e\u3059\uff0e\u5f8c\u65e5\uff0c\u4f8b\u3048\u3070\uff0c\uff13\u884c\u76ee\u306e\u3088\u3046\u306a\u30b3\u30fc\u30c9\u3092\u8ffd\u52a0\u3057\u3066\u3057\u307e\u3063\u305f\u3068\u3057\u307e\u3057\u3087\u3046\uff0e<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">--<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">&lt;?php<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">function redirect(string $uri): never {<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">&nbsp;&nbsp; &nbsp;if ($uri==='') {return;}<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">&nbsp;&nbsp;&nbsp; header('Location:'.$uri);<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">&nbsp;&nbsp;&nbsp; exit();<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">}<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u2013-<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u306e\u5834\u5408\uff0cnever\u306e\u6307\u5b9a\u306b\u3088\u308a\u51e6\u7406\u304c\u623b\u308b\u3053\u3068\u304c\u7981\u6b62\u3055\u308c\u3066\u3044\u308b\u305f\u3081\uff0c3\u884c\u76ee\u3067return\u3092\u5b9f\u884c\u3059\u308b\u30b3\u30fc\u30c9\u306f\u30a8\u30e9\u30fc\u3092\u767a\u751f\u3057\u307e\u3059\uff0e\u3053\u306e\u3088\u3046\u306bnever\u3092\u6307\u5b9a\u3059\u308b\u3053\u3068\u3067\uff0c\u51e6\u7406\u304c\u623b\u3089\u306a\u3044\u95a2\u6570\u306e\u51e6\u7406\u3092\u660e\u793a\u7684\u306b\u6307\u5b9a\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\uff0e<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">&nbsp;<\/h4>\n\n\n\n<h4 class=\"wp-block-heading\">readonly\u578b<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">\u3000PHP 8.1\u3067\u306freadonly\u6307\u5b9a\u5b50\u3092\u4ed8\u4e0e\u3059\u308b\u3053\u3068\u306b\u3088\u308a\u521d\u671f\u5316\u5f8c\u306b\u5909\u66f4\u304c\u3067\u304d\u306a\u3044\u5909\u6570\u3092\u4f5c\u6210\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\uff0e\u3053\u306e\u52d5\u4f5c\u306f\uff0c\u5b9a\u6570\u306b\u4f3c\u3066\u3044\u307e\u3059\u304c\uff0c\u521d\u671f\u5316\u3055\u308c\u308b\u5024\u304c\u56fa\u5b9a\u5024\u3067\u306a\u304f\u3066\u826f\u3044\u3068\u3044\u3046\u7279\u5fb4\u304c\u3042\u308a\u307e\u3059\uff0e\u4ee5\u4e0b\u306e\u4f8b\u3092\u898b\u3066\u307f\u307e\u3057\u3087\u3046\uff0e<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">--<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">&lt;?php<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">class Test {<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">&nbsp; public readonly string $prop;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">&nbsp; public function __construct(string $v){<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">&nbsp;&nbsp;&nbsp; $this-&gt;prop=$v;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">&nbsp; }<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">}<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u2013<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u306e\u4f8b\u3067\u306f\uff0c\u30d7\u30ed\u30d1\u30c6\u30a3\u5909\u6570$prop\u306breadonly\u304c\u6307\u5b9a\u3055\u308c\u3066\u3044\u307e\u3059\uff0e\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u3067\u3053\u306e\u5909\u6570\u306b\u521d\u671f\u5024\u304c\u4ee3\u5165\u3055\u308c\u3066\u3044\u307e\u3059\uff0e\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u201dfoo\u201d\u3092\u6307\u5b9a\u3057\u3066\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u4f5c\u6210\u3059\u308b\u3053\u3068\u306b\u3088\u308a\uff0creadonly\u3092\u6307\u5b9a\u3057\u305f\u30d7\u30ed\u30d1\u30c6\u30a3\u5909\u6570$prop\u306b\u305d\u306e\u5024\u304c\u4ee3\u5165\u3055\u308c\u307e\u3059\uff0e\u3057\u304b\u3057\uff0c\uff13\u884c\u76ee\u3067\u30d7\u30ed\u30d1\u30c6\u30a3\u5909\u6570\u306b\u5024\u3092\u4ee3\u5165\u3057\u3088\u3046\u3068\u3059\u308b\u3068\uff0c\u521d\u671f\u5316\u6642\u3067\u306f\u306a\u3044\u305f\u3081\uff0c\u30a8\u30e9\u30fc\u3092\u767a\u751f\u3057\u307e\u3059\uff0e<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">--<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">$obj = new Test(\u201cfoo\u201d);<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">var_dump($obj-&gt;prop);&nbsp; \/\/ \u201cfoo\u201d<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">$obj-&gt;prop=\u201dboo\u201d;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; \/\/ \u30a8\u30e9\u30fc\u767a\u751f<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u2013<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">\u2018...\u2019\u306b\u3088\u308b\u914d\u5217\u5c55\u958b<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">&nbsp;PHP 8.1\u3067\u306f\u2019...\u2019\u306b\u3088\u308a\u9023\u60f3\u914d\u5217\u306b\u304a\u3051\u308b\u914d\u5217\u5c55\u958b\u304c\u53ef\u80fd\u3068\u306a\u308a\u307e\u3057\u305f\uff0e\u3053\u306e\u2019...\u2019\u3068\u3044\u3046\u30ad\u30fc\u30ef\u30fc\u30c9\u306f\u3044\u304f\u3064\u304b\u306e\u4f7f\u7528\u6cd5\u304c\u65e2\u306b\u5b9a\u7fa9\u3055\u308c\u3066\u3044\u307e\u3059\u306e\u3067\uff0c\u9806\u756a\u306b\u8aac\u660e\u3057\u307e\u3059\uff0e<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u3000\u307e\u305a\uff0cPHP 5.6\u306b\u304a\u3044\u3066\u95a2\u6570\uff08\u30e1\u30bd\u30c3\u30c9\uff09\u306e\u5f15\u6570\u306b\u304a\u3044\u3066\u914d\u5217\u306e\u3088\u305d\u3092\u5c55\u958b\u3059\u308b\u6f14\u7b97\u5b50\u3068\u3057\u3066\u2019...\u2019\u304c\u5c0e\u5165\u3055\u308c\u3066\u3044\u307e\u3059\uff0e\u4ee5\u4e0b\u306e\u4f8b\u306b\u304a\u3044\u3066\uff0ctest\u95a2\u6570\u306e\u5f15\u6570\u3068\u3057\u3066\u8907\u6570\u306e\u914d\u5217\uff08$a, $b\uff09\u3092\u6307\u5b9a\u3057\u3066\u3044\u307e\u3059\uff0e\u2019...\u2019\u3092\u914d\u5217\u5909\u6570\u306e\u524d\u306b\u4ed8\u4e0e\u3059\u308b\u3053\u3068\u306b\u3088\u308a\uff0c\u5f53\u8a72\u914d\u5217\u306e\u8981\u7d20\u304c\u5c55\u958b\u3055\u308c\u307e\u3059\uff0e\u3053\u306e\u4f8b\u3067\u306f\uff0ctest(1,2,3) \u306e\u3088\u3046\u306b\u6307\u5b9a\u3055\u308c\u307e\u3059\uff0e<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">--<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">function test({ var_dump(func_get_args());}<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">$a=[1,2];<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">$b=[3];<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">test(...$a,...$b); \/\/ [1,2,3]<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">--<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u3000\u6b21\u306b PHP 7.4 \u306b\u304a\u3044\u3066\u6dfb\u5b57\u914d\u5217\u306b\u304a\u3051\u308b\u914d\u5217\u306e\u5c55\u958b\u306b\u3082\u3053\u306e\u2019...\u2019\u304c\u5229\u7528\u53ef\u80fd\u3068\u306a\u308a\u307e\u3057\u305f\uff0e\u4ee5\u4e0b\u306e\u4f8b\u3067\u306f\uff0c\u914d\u5217\u5909\u6570$a, $b \u3092\u5225\u306e\u914d\u5217\u5909\u6570\u306b\u4ee3\u5165\u3059\u308b\u969b\u306b\u2019\u2026\u2019 \u3092\u6307\u5b9a\u3059\u308b\u3053\u3068\u3067\uff0c\u914d\u5217\u306e\u8981\u7d20\u3092\u5c55\u958b\u3057\u3066\u3044\u307e\u3059\uff0e<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">--<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">$a=[1,2];<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">$b=[3];<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">$c=[0,...$a,...$b];<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">var_dump($c);&nbsp;&nbsp; \/\/ [0,1,2,3]<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">--<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u3000PHP 8.1\u3067\u306f\uff0c\u6dfb\u5b57\u914d\u5217\u306b\u52a0\u3048\u3066\uff0c\u9023\u60f3\u914d\u5217\u306b\u304a\u3044\u3066\u3082\u2019\u2026\u2019\u3092\u6307\u5b9a\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\uff0e\u4ee5\u4e0b\u306e\u4f8b\u3067\u306f\uff0c\u9023\u60f3\u914d\u5217$a,$b\u3092\u9023\u60f3\u914d\u5217$c\u306b\u4ee3\u5165\u3057\u3066\u3044\u307e\u3059\uff0e<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u2013<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">$a=[\"a\"=&gt;1];<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">$b=[\"b\"=&gt;2];<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">$c=[\"a\"=&gt;0,...$a,...$b];<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">var_dump($c);&nbsp;&nbsp; \/\/ \u201ca\u201d=&gt;1, \u201cb\u201d=&gt;2<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u2013<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u9023\u60f3\u914d\u5217$c\u306b\u6307\u5b9a\u3055\u308c\u308b\u5024\u306f\uff0c[\u201ca\u201d=&gt;0,\u201da\u201d=&gt;1,\u201db\u201d=&gt;2] \u3068\u306a\u308a\u307e\u3059\uff0e\u306a\u304a\uff0c\u9023\u60f3\u914d\u5217\u306e\u30ad\u30fc\u304c\u91cd\u306a\u308b\u5834\u5408\uff0c\u6700\u5f8c\uff08\u3088\u308a\u53f3\u5074\uff09\u306b\u6307\u5b9a\u3055\u308c\u305f\u8981\u7d20\u306e\u5024\u304c\u63a1\u7528\u3055\u308c\u307e\u3059\uff0e\u3053\u306e\u4f8b\u3067\u306f\uff0c\u201da\u201d\u3092\u30ad\u30fc\u3068\u3059\u308b\u5024\u306b\u3064\u3044\u3066\uff0c0\u30681\u304c\u6307\u5b9a\u3055\u308c\u3066\u3044\u307e\u3059\u304c\uff0c\u5f8c\u3067\u6307\u5b9a\u3055\u308c\u305f1\u304c\u63a1\u7528\u3055\u308c\u3066\u3044\u307e\u3059\uff0e<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">\u2018...\u2019\u69cb\u6587\u306b\u3088\u308b\u30af\u30ed\u30fc\u30b8\u30e3<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">\u3000PHP 7.1\u3067\u306f\uff0c\u30b3\u30fc\u30eb\u53ef\u80fd(callable)\u306a\u95a2\u6570\uff08\u30e1\u30bd\u30c3\u30c9\uff09\u3092\u7528\u3044\u3066\u30af\u30ed\u30fc\u30b8\u30e3\u3092\u5b9a\u7fa9\u3059\u308b\u4ed5\u7d44\u307f\u304c\u5b9a\u7fa9\u3055\u308c\u3066\u3044\u307e\u3059\uff0efromCallable \u3068\u3044\u3046\u30b9\u30bf\u30c6\u30a3\u30c3\u30af\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u5b9a\u7fa9\u3059\u308b\u3053\u3068\u3067\uff0c\u30af\u30ed\u30fc\u30b8\u30e3\u3092\u5b9a\u7fa9\u3067\u304d\u307e\u3059\uff0e<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">public static Closure::fromCallable(callable $callback) : Closure<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u3000\u4f8b\u3048\u3070\uff0c\u7d44\u8fbc\u307f\u95a2\u6570strlen\u3092\u7528\u3044\u3066\u30af\u30ed\u30fc\u30b8\u30e3\u3092\u5b9a\u7fa9\u3059\u308b\u3068\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u306a\u308a\u307e\u3059\uff0e<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">--<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">$fn = Closure::fromCallable('strlen');<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u2013<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u3000PHP 8.1\u3067\u306f\u66f4\u306b\u4fbf\u5229\u306b\u306a\u308a\uff0c\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u2019\u2026\u2019 \u3092\u5f15\u6570\u306b\u6307\u5b9a\u3059\u308b\u3060\u3051\u3067\u30af\u30ed\u30fc\u30b8\u30e3\u3092\u5b9a\u7fa9\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\uff0e<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u2013<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">$fn = strlen(...);<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u2013<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">&nbsp;\u4eca\u56de\u3082\u5f15\u304d\u7d9a\u304dPHP 8.1\u306e\u65b0\u6a5f\u80fd\u3092\u7d39\u4ecb\u3057\u307e\u3057\u305f\uff0e\u6b21\u56de\u306f\uff0c\u5c0e\u5165\u3055\u308c\u308b\u6a5f\u80fd\u306e\u7d9a\u304d\u3068\u4e0b\u4f4d\u4e92\u63db\u6027\u304c\u306a\u3044\u5909\u66f4\u70b9\u306a\u3069\u306b\u3064\u3044\u3066\u7d39\u4ecb\u3057\u307e\u3059\uff0e<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u3000<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u590f\u3082\u305d\u308d\u305d\u308d\u7d42\u308f\u308b\u9803\u3068\u306a\u308a\u307e\u3057\u305f\u304c\uff0c\u6b21\u671f\u30de\u30a4\u30ca\u30fc\u30d0\u30fc\u30b8\u30e7\u30f3\u30a2\u30c3\u30d7\u3068\u306a\u308bPHP\u30d0\u30fc\u30b8\u30e7\u30f38.1\u306e\u958b\u767a\u306f\u8a08\u753b\u901a\u308a\u9806\u8abf\u306b\u9032\u3093\u3067\u304a\u308a\uff0c7\u670820\u65e5\u306b\u30d5 ... <a title=\"PHP\u91cd\u93ae\u306e\u5ee3\u5ddd\u985e\u6c0f\u306b\u3088\u308b\u30b3\u30e9\u30e0\u300cPHP\u306e\u6700\u65b0\u72b6\u6cc1\uff1aPHP 8.1\u306e\u958b\u767a\u304c\u3044\u3088\u3044\u3088\u6700\u7d42\u6bb5\u968e\u306b\uff08\u7b2c19\u56de\uff09\u300d\" class=\"read-more\" href=\"https:\/\/kusanagi.tokyo\/column\/archives\/column_4532\" aria-label=\"PHP\u91cd\u93ae\u306e\u5ee3\u5ddd\u985e\u6c0f\u306b\u3088\u308b\u30b3\u30e9\u30e0\u300cPHP\u306e\u6700\u65b0\u72b6\u6cc1\uff1aPHP 8.1\u306e\u958b\u767a\u304c\u3044\u3088\u3044\u3088\u6700\u7d42\u6bb5\u968e\u306b\uff08\u7b2c19\u56de\uff09\u300d \u306b\u3064\u3044\u3066\u3055\u3089\u306b\u8aad\u3080\">Read more<\/a><\/p>\n","protected":false},"author":14,"featured_media":1280,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"content-type":"","footnotes":""},"categories":[15],"tags":[110],"series":[50],"journey":[99],"product":[],"class_list":["post-4532","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-php","tag-technical-guides","series-php-column-hiirokawa","journey-run","generate-columns","tablet-grid-50","mobile-grid-100","grid-parent","grid-33","no-featured-image-padding"],"_links":{"self":[{"href":"https:\/\/kusanagi.tokyo\/column\/wp-json\/wp\/v2\/posts\/4532","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/kusanagi.tokyo\/column\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/kusanagi.tokyo\/column\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/kusanagi.tokyo\/column\/wp-json\/wp\/v2\/users\/14"}],"replies":[{"embeddable":true,"href":"https:\/\/kusanagi.tokyo\/column\/wp-json\/wp\/v2\/comments?post=4532"}],"version-history":[{"count":1,"href":"https:\/\/kusanagi.tokyo\/column\/wp-json\/wp\/v2\/posts\/4532\/revisions"}],"predecessor-version":[{"id":5340,"href":"https:\/\/kusanagi.tokyo\/column\/wp-json\/wp\/v2\/posts\/4532\/revisions\/5340"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/kusanagi.tokyo\/column\/wp-json\/wp\/v2\/media\/1280"}],"wp:attachment":[{"href":"https:\/\/kusanagi.tokyo\/column\/wp-json\/wp\/v2\/media?parent=4532"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kusanagi.tokyo\/column\/wp-json\/wp\/v2\/categories?post=4532"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kusanagi.tokyo\/column\/wp-json\/wp\/v2\/tags?post=4532"},{"taxonomy":"series","embeddable":true,"href":"https:\/\/kusanagi.tokyo\/column\/wp-json\/wp\/v2\/series?post=4532"},{"taxonomy":"journey","embeddable":true,"href":"https:\/\/kusanagi.tokyo\/column\/wp-json\/wp\/v2\/journey?post=4532"},{"taxonomy":"product","embeddable":true,"href":"https:\/\/kusanagi.tokyo\/column\/wp-json\/wp\/v2\/product?post=4532"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}