{"id":30186,"date":"2024-02-16T09:14:22","date_gmt":"2023-02-03T21:27:28","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e5%85%b3%e4%ba%8e-php-enum\/"},"modified":"2025-08-12T17:59:10","modified_gmt":"2025-08-12T09:59:10","slug":"%e5%85%b3%e4%ba%8e-php-enum","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e5%85%b3%e4%ba%8e-php-enum\/","title":{"rendered":"\u5173\u4e8e PHP Enum"},"content":{"rendered":"<h1>\u603b\u7ed3<\/h1>\n<ul class=\"post-ul\">\nPHP\u306eEnum\u306b\u3064\u3044\u3066\u3061\u3083\u3093\u3068\u7406\u89e3\u3057\u3066\u307e\u3068\u3081\u308b\n<\/ul>\n<h1>&#8220;Enum\u662f\u4ec0\u4e48\u610f\u601d\u5462\uff1f&#8221;<\/h1>\n<ul class=\"post-ul\">\n\u53d6\u308a\u3046\u308b\u5024\u3092\u9650\u5b9a\u3057\u305f\u72ec\u81ea\u306e\u578b\u3092\u5b9a\u7fa9\u3067\u304d\u308b\u30af\u30e9\u30b9\u306b\u4f3c\u3066\u3044\u308b\u3082\u306e\u3002<br \/>\n\u4f3c\u3066\u3044\u308b\u3060\u3051\u3067\u30af\u30e9\u30b9\u3067\u306f\u306a\u3044\u3002\u30af\u30e9\u30b9\u3084\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u4e0a\u306b\u69cb\u7bc9\u3055\u308c\u3066\u3044\u308b\u3002\n<\/ul>\n<h1>\u679a\u4e3e\u89c4\u5219<\/h1>\n<ul class=\"post-ul\">\n\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u3001\u30c7\u30b9\u30c8\u30e9\u30af\u30bf\u306f\u66f8\u3051\u306a\u3044\u3002<br \/>\n\u7d99\u627f\u3092\u3059\u308b\u3053\u3068\u3082\u7d99\u627f\u3055\u308c\u308b\u3053\u3068\u3082\u3067\u304d\u306a\u3044\u3002<br \/>\n\u30d7\u30ed\u30d1\u30c6\u30a3\u30fc\u306f\u8a31\u53ef\u3055\u308c\u3066\u3044\u306a\u3044\u3002<br \/>\ncase\u3092clone\u3059\u308b\u3053\u3068\u306f\u30b5\u30dd\u30fc\u30c8\u3055\u308c\u3066\u3044\u306a\u3044\u3002<br \/>\n\u4f7f\u3046\u524d\u306b\u5ba3\u8a00\u3057\u306a\u3044\u3068\u3044\u3051\u306a\u3044\u3002<br \/>\nnew\u3092\u4f7f\u3063\u3066\u76f4\u63a5\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u5316\u3067\u304d\u306a\u3044\u3002<\/p>\n<p>__call\u3068__callStatic\u3068__invoke\u4ee5\u5916\u306e\u30de\u30b8\u30c3\u30af\u30e1\u30bd\u30c3\u30c9\u306f\u8a31\u53ef\u3055\u308c\u3066\u3044\u306a\u3044\u3002<\/p>\n<p>__CLASS__\u3068__FUNCTION__\u4ee5\u5916\u306e\u30de\u30b8\u30c3\u30af\u5b9a\u6570\u306f\u8a31\u53ef\u3055\u308c\u3066\u3044\u306a\u3044\u3002<br \/>\n\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u306e\u5b9f\u88c5\u53ef\u80fd<br \/>\n\u30a2\u30c8\u30ea\u30d3\u30e5\u30fc\u30c8\u3092\u6df1\u3059\u308b\u4e8b\u304c\u53ef\u80fd<br \/>\n\u5b9a\u7fa9\u53ef\u80fd\u30e1\u30bd\u30c3\u30c9<\/p>\n<p>public<br \/>\nprivate<br \/>\nprotected<\/p>\n<p>\u5b9a\u7fa9\u53ef\u80fdstatic\u30e1\u30bd\u30c3\u30c9<\/p>\n<p>public<br \/>\nprivate<br \/>\nprotected<\/p>\n<\/ul>\n<h1>\u679a\u4e3e\u7684\u7c7b\u578b\u9009\u9879<\/h1>\n<h3>PureEnum \u7eaf\u679a\u4e3e<\/h3>\n<ul class=\"post-ul\">\n<p>PureCase\u3060\u3051\u3092\u542b\u3080Enum\u306e\u3053\u3068\u3002<\/p>\n<p>PureCase<\/p>\n<p>\u95a2\u9023\u3059\u308b\u30c7\u30fc\u30bf\u304c\u7121\u3044\u540d\u524d\u3060\u3051\u306eCase<\/p>\n<p>\u4f8b<br \/>\n<?php\nenum Suit\n{\n    case Hearts;\n    case Diamonds;\n    case Clubs;\n    case Spades;\n}\n\n\n\n\u8aad\u307f\u53d6\u308a\u5c02\u7528\u30d7\u30ed\u30d1\u30c6\u30a3\u30fc\u306ename\u304c\u3042\u308b\u3002\u4e0b\u8a18\u306b\u3088\u3046\u306bEnum\u3092\u547c\u3073\u51fa\u3059\u3053\u3068\u3067case\u3067\u5b9a\u7fa9\u3055\u308c\u3066\u3044\u308bcase\u305d\u306e\u3082\u306e\u306e\u540d\u524d\u3092\u5f97\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u3002\n<?php\n\/\/ Hearts\u304c\u683c\u7d0d\u3055\u308c\u308b\n$suit = Suit::Hearts->name;<\/p>\n<\/ul>\n<h3>\u652f\u6301\u7684\u679a\u4e3e\u7c7b\u578b<\/h3>\n<ul class=\"post-ul\">\n<p>\u30b9\u30ab\u30e9\u30fc\u5024\u3092\u6301\u3064Case\u304c\u542b\u307e\u308c\u308bEnum\u306e\u3053\u3068\u3002<\/p>\n<p>\u30b9\u30ab\u30e9\u30fc\u5024<\/p>\n<p>\u30b9\u30ab\u30e9\u30fc\u578b\u306e\u5024\u306e\u3053\u3068<br \/>\nPHP\u3060\u3068\u8ad6\u7406\u578b\uff08bool\uff09\u3001\u6574\u6570\u578b\uff08int\uff09\u3001\u6d6e\u52d5\u5c0f\u6570\u70b9\u578b\uff08float, double, real\uff09\u3001\u6587\u5b57\u5217\u578b\uff08string\uff09\u304c\u30b9\u30ab\u30e9\u30fc\u578b<\/p>\n<p>\u4f8b<br \/>\n<?php\nenum Suit: string\n{\n    case Hearts = 'H';\n    case Diamonds = 'D';\n    case Clubs = 'C';\n    case Spades = 'S';\n}\n\n\n\n\u4e00\u3064\u306eEnum\u3067\u6301\u3066\u308b\u30b9\u30ab\u30e9\u30fc\u5024\u306e\u578b\u306f\u4e00\u3064\u3060\u3051\u3002\u4e0b\u8a18\u307f\u305f\u3044\u306a\u66f8\u304d\u65b9\u306f\u3067\u304d\u306a\u3044\u3002\uff08\u305d\u3082\u305d\u3082enum Suit: string|int\u3068\u3044\u3046\u66f8\u304d\u65b9\u304c\u3067\u304d\u306a\u3044\u3002\u4eee\u306b\u3000enum Suit: string\u3067\u30b9\u30ab\u30e9\u30fc\u5024\u304cstring\u3068int\u304c\u5165\u308a\u6df7\u3058\u3063\u3066\u3044\u305f\u3089\u300cEnum\u5b9a\u7fa9\u6642\u306estring\u578b\u3068\u30de\u30c3\u30c1\u3057\u306a\u3044\u7269\u304c\u3042\u308b\u30a8\u30e9\u30fc\u300d\u304c\u51fa\u308b\u3002\uff09\n<?php\nenum Suit: string|int\n{\n    case Hearts = 'H';\n    case Diamonds = 1;\n    case Clubs = 'C';\n    case Spades = 2;\n}\n\n\n\n\u30b9\u30ab\u30e9\u30fc\u5024\u306f\u30e6\u30cb\u30fc\u30af\u3067\u3042\u308b\u5fc5\u8981\u304c\u3042\u308b\u3002\u4e0b\u8a18\u307f\u305f\u3044\u306a\u66f8\u304d\u65b9\u306f\u3067\u304d\u306a\u3044\u3002\n<?php\nenum Suit: string\n{\n    case Hearts = 'H';\n    case Diamonds = 'H';\n    case Clubs = 'H';\n    case Spades = 'H';\n}\n\n\n\n\u8aad\u307f\u53d6\u308a\u5c02\u7528\u30d7\u30ed\u30d1\u30c6\u30a3\u30fc\u306evalue\u304c\u3042\u308b\u3002\u4e0b\u8a18\u306e\u3088\u3046\u306b\u8a18\u8f09\u3059\u308b\u3053\u3068\u3067case\u306e\u540d\u524d\u306b\u7d10\u3065\u304f\u30b9\u30ab\u30e9\u30fc\u5024\u3092\u53d6\u5f97\u3059\u308b\u4e8b\u304c\u3067\u304d\u308b\u3002\n<?php\n\/\/ H\u304c\u683c\u7d0d\u3055\u308c\u308b\n$suitValue = Suit::Hearts->value;<\/p>\n<p>BackedEnum\u306fBackedEnum\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3092\u5b9f\u88c5\u3057\u3066\u3044\u308b\u3089\u3057\u3044\u3002\u305d\u306e\u305f\u3081from\u3068tryFrom\u3068\u3044\u30462\u500b\u306estatic\u306a\u95a2\u6570\u3092\u547c\u3073\u51fa\u3059\u4e8b\u304c\u3067\u304d\u308b\u3002<\/p>\n<p>from\u95a2\u6570\u3092\u4f7f\u3063\u3066\u5024\u304b\u3089Enum\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u53d6\u5f97\u3059\u308b\u3002<\/p>\n<p>\u4e0b\u8a18\u306e\u3088\u3046\u306bfrom\u95a2\u6570\u3092\u7528\u3044\u308b\u3053\u3068\u3067\u5f15\u6570\u306e\u5024\u3068case\u306b\u7d10\u3065\u304f\u30b9\u30ab\u30e9\u30fc\u5024\u3092\u6bd4\u8f03\u3001\u4e00\u81f4\u3059\u308b\u3082\u306e\u304c\u3042\u308c\u3070\u5f53\u8a72case\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u8fd4\u3059\u3002\uff08\u5f15\u6570\u3068\u30b9\u30ab\u30e9\u30fc\u5024\u306e\u6bd4\u8f03\u306fPHP\u5074\u306e\u8a2d\u5b9a\u3067\u300c\u5f37\u3044\u6bd4\u8f03\u300d\u300c\u5f31\u3044\u6bd4\u8f03\u300d\u3092\u9078\u629e\u3067\u304d\u308b\u3002\u5f37\u3044\u6bd4\u8f03 \u2192 PHP declare(strict_types=1)\u3063\u3066\u306a\u3093\u3060\uff01\uff1f\uff09<br \/>\n<?php\n\nenum Suit: string\n{\n    case Hearts = 'H';\n    case Diamonds = 'D';\n    case Clubs = 'C';\n    case Spades = 'S';\n}\n\n$suit = Suit::from('H');\n\n\/\/ enum(Suit::Hearts)\u3068\u51fa\u529b\u3055\u308c\u308b\nvar_dump($suit);\n\n\n\n\u5f15\u6570\u306e\u5024\u304ccase\u306b\u7d10\u3065\u304f\u30b9\u30ab\u30e9\u30fc\u5024\u306e\u3044\u305a\u308c\u3068\u3082\u4e00\u81f4\u3057\u306a\u304b\u3063\u305f\u5834\u5408\u30a8\u30e9\u30fc\u3092\u8fd4\u3059\u3002\n<?php\n\nenum Suit: string\n{\n    case Hearts = 'H';\n    case Diamonds = 'D';\n    case Clubs = 'C';\n    case Spades = 'S';\n}\n\n\/\/ \u30a8\u30e9\u30fc\u767a\u751f\u3000\u300cPHP Fatal error:  Uncaught ValueError: \"X\" is not a valid backing value for enum \"Suit\"\u300d\n$suit = Suit::from('X');\n\n\n\n\n\ntryFrom\u95a2\u6570\u3092\u7528\u3044\u3066\u5024\u304b\u3089Enum\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u53d6\u5f97\u3059\u308b\u3002\n\n\n\u4e0b\u8a18\u306e\u3088\u3046\u306btryFrom\u95a2\u6570\u3092\u7528\u3044\u308b\u3053\u3068\u3067from\u95a2\u6570\u306e\u6642\u3068\u540c\u69d8\u306e\u632f\u308b\u821e\u3044\u3092\u3059\u308b\u3002\n<?php\n\nenum Suit: string\n{\n    case Hearts = 'H';\n    case Diamonds = 'D';\n    case Clubs = 'C';\n    case Spades = 'S';\n}\n\n$suit = Suit::tryFrom('H');\n\n\/\/ enum(Suit::Hearts)\u3068\u51fa\u529b\u3055\u308c\u308b\nvar_dump($suit);\n\n\n\n\u5f15\u6570\u306e\u5024\u304ccase\u306b\u7d10\u3065\u304f\u30b9\u30ab\u30e9\u30fc\u5024\u306e\u3044\u305a\u308c\u3068\u3082\u4e00\u81f4\u3057\u306a\u304b\u3063\u305f\u5834\u5408null\u3092\u8fd4\u3059\u3002\n<?php\n\nenum Suit: string\n{\n    case Hearts = 'H';\n    case Diamonds = 'D';\n    case Clubs = 'C';\n    case Spades = 'S';\n}\n\n$suit = Suit::tryFrom('X');\n\n\/\/ null\u3068\u51fa\u529b\u3055\u308c\u308b\nvar_dump($suit);\n\n\n\n\n<\/ul>\n<h1>\u51fd\u6570\u7684\u5b9a\u4e49<\/h1>\n<ul class=\"post-ul\">\n<p>PureEnum\u3001BackedEnum\u5171\u306b\u95a2\u6570\u3092\u5b9a\u7fa9\u3059\u308b\u3053\u3068\u306f\u53ef\u80fd\u3067\u3042\u308b\u3002\uff08public, private, protected\u306e\u95a2\u6570\u304c\u5b9a\u7fa9\u3067\u304d\u308b\u3051\u3069\u3001\u7d50\u5c40Enum\u306f\u7d99\u627f\u3067\u304d\u306a\u3044\u304b\u3089\u4f55\u3092\u6307\u5b9a\u3057\u3066\u3082protected\u3068\u5b9f\u8cea\u306f\u540c\u3058\uff09<\/p>\n<p>\u4f8b<br \/>\n<?php\n\nenum Suit: string\n{\n    case Hearts = 'H';\n    case Diamonds = 'D';\n    case Clubs = 'C';\n    case Spades = 'S';\n    \n    public function foo(){\n        return '\u30c8\u30e9\u30f3\u30d7\u306f\u697d\u3057\u3044';\n    }\n}\n\n$suit = Suit::Hearts->foo();<\/p>\n<p>\/\/ \u300c\u30c8\u30e9\u30f3\u30d7\u306f\u697d\u3057\u3044\u300d\u3068\u51fa\u529b\u3055\u308c\u308b<br \/>\necho $suit;<\/p>\n<p>\u30c8\u30ec\u30a4\u30c8\u3092use\u3059\u308b\u3053\u3068\u3082\u3067\u304d\u308b\u3002<br \/>\n<?php\n\ntrait Values{\n    public function foo(){\n        return '\u30c8\u30e9\u30f3\u30d7\u306f\u697d\u3057\u3044';\n    }\n}\n\nenum Suit: string\n{\n    use Values;\n    \n    case Hearts = 'H';\n    case Diamonds = 'D';\n    case Clubs = 'C';\n    case Spades = 'S';\n}\n\n$suit = Suit::Hearts->foo();<\/p>\n<p>\/\/ \u300c\u30c8\u30e9\u30f3\u30d7\u306f\u697d\u3057\u3044\u300d\u3068\u51fa\u529b\u3055\u308c\u308b<br \/>\necho $suit;<\/p>\n<p>\u4e0b\u8a18\u306e\u3088\u3046\u306b\u8a18\u8f09\u3059\u308c\u3070PureEnum\u3067\u3082\u7d10\u3065\u304f\u5024\u3092\u8a2d\u5b9a\u3059\u308b\u4e8b\u304c\u3067\u304d\u308b\u3002<br \/>\n<?php\n\nenum Suit\n{\n    case Hearts;\n    case Diamonds;\n    case Clubs;\n    case Spades;\n    \n    public function values(){\n        return match ($this) {\n            Suit::Hearts => &#8216;H&#8217;,<br \/>\n            Suit::Diamonds => &#8216;D&#8217;,<br \/>\n            Suit::Clubs => &#8216;C&#8217;,<br \/>\n            Suit::Spades => &#8216;S&#8217;,<br \/>\n        };<br \/>\n    }<br \/>\n}<\/p>\n<p>\/\/ \u300cH\u300d\u3068\u51fa\u529b\u3055\u308c\u308b<br \/>\necho Suit::Hearts->values();<\/p>\n<p>\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u306e\u4ee3\u308f\u308a\u3092\u3055\u305b\u305f\u3044\u306a\u3089static\u95a2\u6570\u3092\u5b9a\u7fa9\u3059\u308b\u3002<br \/>\n<?php\n\nenum Suit: string\n{\n    case Hearts = 'H';\n    case Diamonds = 'D';\n    case Clubs = 'C';\n    case Spades = 'S';\n    \n    public static function foo(int $int){\n        return match ($int) {\n            1 => Suit::Hearts,<br \/>\n            2 => Suit::Diamonds,<br \/>\n            3 => Suit::Clubs,<br \/>\n            4 => Suit::Spades,<br \/>\n        };<br \/>\n    }<br \/>\n}<\/p>\n<p>$suit = Suit::foo(1);<\/p>\n<p>\/\/ \u300cenum(Suit::Hearts)\u300d\u3068\u51fa\u529b\u3055\u308c\u308b<br \/>\nvar_dump($suit);<\/p>\n<\/ul>\n<h1>\u5c06Enum\u7684case\u4ee5\u6570\u7ec4\u5f62\u5f0f\u8fd4\u56de\u3002<\/h1>\n<ul class=\"post-ul\">\n<p>\u4e0b\u8a18\u306e\u3088\u3046\u306b\u8a18\u8f09\u3059\u308b\u3053\u3068\u3067Enum\u306ecase\u3092\u5ba3\u8a00\u3055\u308c\u305f\u9806\u756a\u3067\u914d\u5217\u3067\u53d6\u5f97\u3059\u308b\u4e8b\u304c\u3067\u304d\u308b\u3002<br \/>\n<?php\n\nenum Suit: string\n{\n    case Hearts = 'H';\n    case Diamonds = 'D';\n    case Clubs = 'C';\n    case Spades = 'S';\n}\n\nvar_dump(Suit::cases());\n\n\n<\/ul>\n<h1>\u6587\u732e\u53c2\u8003<\/h1>\n<ul class=\"post-ul\">\nhttps:\/\/www.php.net\/manual\/ja\/language.enumerations.php\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>\u603b\u7ed3 PHP\u306eEnum\u306b\u3064\u3044\u3066\u3061\u3083\u3093\u3068\u7406\u89e3\u3057\u3066\u307e\u3068\u3081\u308b &#8220;Enum\u662f\u4ec0\u4e48\u610f\u601d\u5462\uff1f&#8221; \u53d6 [&hellip;]<\/p>\n","protected":false},"author":12,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[227],"class_list":["post-30186","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-227"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>\u5173\u4e8e PHP Enum - Blog - Silicon Cloud<\/title>\n<meta name=\"description\" content=\"\u5173\u4e8e\u5173\u4e8e PHP Enum\u7684\u6280\u672f\u6587\u7ae0\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.silicloud.com\/zh\/blog\/\u5173\u4e8e-php-enum\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta 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