{"id":9693,"date":"2025-07-23T17:57:55","date_gmt":"2025-07-23T08:57:55","guid":{"rendered":"https:\/\/www.prime-strategy.co.jp\/column\/?p=9693"},"modified":"2026-02-17T01:05:19","modified_gmt":"2026-02-16T16:05:19","slug":"php%e3%81%ae%e6%9c%80%e6%96%b0%e7%8a%b6%e6%b3%81%ef%bc%9a-php-8-5%e3%81%ae%e9%96%8b%e7%99%ba%e3%81%8c%e9%80%b2%e8%a1%8c%e4%b8%ad-%ef%bc%88%e7%ac%ac43%e5%9b%9e%ef%bc%89","status":"publish","type":"post","link":"https:\/\/kusanagi.tokyo\/column\/archives\/column_9693","title":{"rendered":"PHP\u306e\u6700\u65b0\u72b6\u6cc1\uff1a PHP 8.5\u306e\u958b\u767a\u304c\u9032\u884c\u4e2d \uff08\u7b2c43\u56de\uff09"},"content":{"rendered":"\n

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PHP 8.5\u3067\u306f\u3001OPcache\u304c\u6a19\u6e96\u30a8\u30af\u30b9\u30c6\u30f3\u30b7\u30e7\u30f3\u3068\u306a\u308a\u3001\u5fc5\u9808\u306b\u306a\u308a\u307e\u3059\u3002\u3053\u306e\u305f\u3081\u3001\u660e\u793a\u7684\u306b --enable-opcache\u3092PHP\u69cb\u7bc9\u30aa\u30d7\u30b7\u30e7\u30f3\uff08configure\uff09\u306b\u6307\u5b9a\u3059\u308b\u5fc5\u8981\u306f\u306a\u304f\u306a\u308a\u3001\u6a19\u6e96\u3067PHP\u306b\u7d44\u307f\u8fbc\u307e\u308c\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001OPcache\u3068ZendEngine\u304c\u3088\u308a\u5bc6\u306b\u9023\u643a\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u3001\u30b3\u30fc\u30c9\u306e\u7ba1\u7406\u306e\u624b\u9593\u304c\u4f4e\u6e1b\u3059\u308b\u3068\u5171\u306b\u3001\u5c06\u6765\u7684\u306a\u6027\u80fd\u5411\u4e0a\u304c\u671f\u5f85\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n

<\/span>\u30d1\u30a4\u30d7\u6f14\u7b97\u5b50\u304c\u8ffd\u52a0<\/span><\/h2>\n\n\n\n

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\n

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


class User {
\u00a0 \u00a0 public function __construct(
\u00a0 \u00a0 \u00a0 \u00a0 public string $username\u3001
\u00a0 \u00a0 \u00a0 \u00a0 public bool $isAdmin = false\u3001
\u00a0 \u00a0 ) {}
}<\/p>\n\n\n\n

function getUsers(): array {
\u00a0 \u00a0 return [
\u00a0 \u00a0 \u00a0 \u00a0 new User('root'\u3001 isAdmin: true)\u3001
\u00a0 \u00a0 \u00a0 \u00a0 new User('john.doe'\u3001 isAdmin: false)\u3001
\u00a0 \u00a0 ];
}<\/p>\n\n\n\n

function isAdmin(User $user): bool {
\u00a0 \u00a0 return $user->isAdmin;
}<\/p>\n<\/blockquote>\n\n\n\n

\u3053\u306e\u30b3\u30fc\u30c9\u3067\u306f\u3001User\u3068\u3044\u3046\u30af\u30e9\u30b9\u3092\u5b9a\u7fa9\u3057\u30012\u3064\u306e\u30d7\u30ed\u30d1\u30c6\u30a3\u5909\u6570\uff08$username\u3001 $isAdmin\uff09\u3092\u5b9a\u7fa9\u3057\u3066\u3044\u307e\u3059\u3002getUsers\u95a2\u6570\u306f\u30012\u3064\u306eUser\u30af\u30e9\u30b9\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u304b\u3089\u306a\u308b\u914d\u5217\u3092\u8fd4\u3057\u307e\u3059\u3002isAdmin\u306fUser\u30af\u30e9\u30b9\u3092\u5f15\u6570\u3068\u3057\u3066\u305d\u306e\u30e6\u30fc\u30b6\u304c\u7ba1\u7406\u8005\u3067\u3042\u308b\u304b\uff08isAdmin\u304ctrue\u3067\u3042\u308b\u304b\uff09\u78ba\u8a8d\u3057\u307e\u3059\u3002<\/p>\n\n\n\n

\u4f8b\u3048\u3070\u3001\u8907\u6570\u306e\u767b\u9332\u30e6\u30fc\u30b6\u306e\u4e2d\u3067\u7ba1\u7406\u8005\u306e\u6570\u3092\u6570\u3048\u305f\u3044\u5834\u5408\u3001\u5f93\u6765\uff08PHP 8.4\u307e\u3067\uff09\u306e\u30d0\u30fc\u30b8\u30e7\u30f3\u3067\u306f\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u500b\u5225\u306e\u51e6\u7406\u3092\u5206\u5272\u3057\u3066\u8a18\u8ff0\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3057\u305f\u3002<\/p>\n\n\n\n

\n

$users = getUsers();
$admins = array_filter($users\u3001 'isAdmin');
$numberOfAdmins = count($admins);<\/p>\n\n\n\n

var_dump($numberOfAdmins); \/\/ int(1);<\/p>\n<\/blockquote>\n\n\n\n

\u5148\u306b\u5b9a\u7fa9\u3057\u305fgetUsers()\u95a2\u6570\u3092\u7528\u3044\u3066\u6709\u52b9\u306a\u30e6\u30fc\u30b6\u306e\u5b9a\u7fa9\u3092User\u30af\u30e9\u30b9\u306e\u914d\u5217\u3068\u3057\u3066\u53d6\u5f97\u3057\u305f\u5f8c\u3001isAdmin\u95a2\u6570\u3092\u30d5\u30a3\u30eb\u30bf\u3068\u3057\u3066array_filter\u95a2\u6570\u306b\u9069\u7528\u3057\u3001\u914d\u5217\u5909\u6570$admins\u3092\u53d6\u5f97\u3057\u3066\u3044\u307e\u3059\u3002\u3053\u306e\u914d\u5217\u306e\u4e2d\u3067\u5024\u304c\u771f\u5024\u3067\u3042\u308b\u3082\u306e\u3092count\u95a2\u6570\u3067\u6570\u3048\u3066\u51fa\u529b\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n

PHP 8.5\u3067\u30b5\u30dd\u30fc\u30c8\u3055\u308c\u308b\u30d1\u30a4\u30d7\u6a5f\u80fd\u3067\u306f\u3001\u201d|>\u201d\u306b\u3088\u308a\u8907\u6570\u306e\u51e6\u7406\u3092\u9023\u7d50\u3057\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u7c21\u6f54\u306b\u8a18\u8ff0\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n

\n

$numberOfAdmins = getUsers()
\u00a0 \u00a0 |> fn ($list) => array_filter($list\u3001 isAdmin(...))
\u00a0 \u00a0 |> count(\u2026);<\/p>\n\n\n\n

var_dump($numberOfAdmins); \/\/ int(1);<\/p>\n<\/blockquote>\n\n\n\n

\u3000\u3053\u3053\u3067\u3001isAdmin(\u2026)\u304a\u3088\u3073count(\u2026)\u306b\u304a\u3044\u3066\u3001\u201d\u2026\u201d\u306e\u90e8\u5206\u306f\uff26\uff23\uff23\uff08First class callable\uff09\u69cb\u6587\u3068\u547c\u3070\u308c\u3001PHP 8.1\u3067\u8ffd\u52a0\u3055\u308c\u305f\u6a5f\u80fd\u3067\u3059\u3002FCC\u306b\u3088\u308a\u30b3\u30fc\u30e9\u30d6\u30eb\u306a\u95a2\u6570\u304b\u3089\u30af\u30ed\u30fc\u30b8\u30e3\u3092\u751f\u6210\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u30d1\u30a4\u30d7\u6f14\u7b97\u5b50\u3092\u5229\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u4e00\u9023\u306e\u51e6\u7406\u3092\uff11\u884c\u3067\u30b7\u30f3\u30d7\u30eb\u306b\u8a18\u8ff0\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n

<\/span>array_first()\u3001arrai_last()\u95a2\u6570\u8ffd\u52a0<\/span><\/h2>\n\n\n\n

PHP\u3067\u306f\u3001v[0]\u306e\u3088\u3046\u306b\u914d\u5217\u3092\u6dfb\u5b57\uff08\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\uff09\u306b\u3088\u308a\u30a2\u30af\u30bb\u30b9\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002PHP\u306e\u914d\u5217\u306f\u3001\u6dfb\u5b57\u3092\u30ad\u30fc\u3068\u3059\u308b\u30de\u30c3\u30d7\u3068\u3057\u3066\u5b9f\u88c5\u3055\u308c\u3066\u304a\u308a\u3001\u6dfb\u5b57\u306b\u8ca0\u306e\u5024\u3084\u6587\u5b57\u5217\u3092\u6307\u5b9a\u3059\u308b\u3053\u3068\u3082\u53ef\u80fd\u3067\u3059\u3002\u3053\u306e\u305f\u3081\u3001\u5404\u8981\u7d20\u306e\u5024\u306b\u95a2\u3057\u3066\u6dfb\u5b57\u306e\u9806\u756a\u3068\u914d\u5217\u306b\u304a\u3051\u308b\u30e1\u30e2\u30ea\u4e0a\u306e\u4f4d\u7f6e\u306f\u7570\u306a\u308b\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n

\u3000\u3053\u3053\u3067\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u914d\u5217$v\u3092\u4f8b\u3068\u3057\u3066\u898b\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n

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$v = [1 => 'a'\u3001 0 => 'b'\u3001 3 => 'c'\u3001 2 => 'd'];
var_dump($v); \/\/ [1 => 'a'\u3001 0 => 'b'\u3001 3 => 'c'\u3001 2 => 'd']<\/p>\n<\/blockquote>\n\n\n\n

\u3000\u7269\u7406\u7684\u306a\u30e1\u30e2\u30ea\u4e0a\u306e\u914d\u7f6e\u306b\u57fa\u3065\u304d\u3001\u914d\u5217\u306e\u6700\u521d\uff08\u307e\u305f\u306f\u6700\u5f8c\uff09\u306e\u8981\u7d20\u306b\u30a2\u30af\u30bb\u30b9\u3059\u308b\u305f\u3081\u306b\u306f\u3001\u4f8b\u3048\u3070\u3001PHP 7.3\u3067\u8ffd\u52a0\u3055\u308c\u305farray_key_first() \uff08\u307e\u305f\u306farray_key_last()\uff09\u95a2\u6570\u3092\u7528\u3044\u3066\u914d\u5217\u306e\u5148\u982d\uff08\u307e\u305f\u306f\u6700\u5f8c\uff09\u306e\u30ad\u30fc\u3092\u53d6\u5f97\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3057\u305f\u3002<\/p>\n\n\n\n

\n

var_dump($v[array_key_first($v)]); \/\/ string(1) \"a\"
var_dump($v[array_key_last($v)]); \/\/ string(1) \"d\"<\/p>\n<\/blockquote>\n\n\n\n

\u3000PHP 8.5\u3067\u306f\u3001array_first()\u3001array_last()\u95a2\u6570\u304c\u8ffd\u52a0\u3055\u308c\u3001\u914d\u5217\u306e\u5148\u982d\uff08\u6700\u5f8c\uff09\u306e\u5024\u3092\u7c21\u5358\u306b\u53d6\u5f97\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n

\n

var_dump(array_first($v)); \/\/ string(1) \"a\"
var_dump(array_last($v)); \/\/ string(1) \"d\"<\/p>\n<\/blockquote>\n\n\n\n

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ksort($v); \/\/ \u30ad\u30fc\u3067\u30bd\u30fc\u30c8
var_dump($v); \/\/ [0 => 'b'\u3001 1 => 'a'\u3001 2 => 'd'\u3001 3 => 'c']
var_dump(array_first($v)); \/\/ string(1) \"b\"
var_dump(array_last($v)); \/\/ string(1) \"c\"
var_dump($v[0]); \/\/ string(1) \"b\"
var_dump($v[3]); \/\/ string(1) \"c\"<\/p>\n<\/blockquote>\n\n\n\n

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