{"id":23753,"date":"2017-05-26T15:06:05","date_gmt":"2017-05-26T06:06:05","guid":{"rendered":"http:\/\/www.sejuku.net\/blog\/?p=23753"},"modified":"2024-05-06T11:42:41","modified_gmt":"2024-05-06T02:42:41","slug":"%e3%80%90php%e5%85%a5%e9%96%80%e3%80%91class%e3%81%a7%e9%9d%99%e7%9a%84%e3%83%a1%e3%83%b3%e3%83%90%e3%82%92%e4%bd%bf%e7%94%a8%e3%81%99%e3%82%8b%e6%96%b9%e6%b3%95static","status":"publish","type":"post","link":"https:\/\/www.sejuku.net\/blog\/23753","title":{"rendered":"\u3010PHP\u5165\u9580\u3011\u30af\u30e9\u30b9\u5909\u6570\u30fb\u30af\u30e9\u30b9\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3059\u308b\u65b9\u6cd5(static)"},"content":{"rendered":"

PHP\u3067\u306f\u3001Java\u3084C#\u306e\u3088\u3046\u306a\u30d6\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u8a00\u8a9e\u540c\u69d8\u306bstatic<\/strong><\/span>\u3092\u4f7f\u7528\u3057\u3066\u9759\u7684\u30e1\u30f3\u30d0\u3092\u6307\u5b9a\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n

\u3053\u306e\u8a18\u4e8b\u3067\u306f\u3001<\/p>\n

\u30fbPHP\u306e\u30af\u30e9\u30b9\u306e\u69cb\u9020<\/strong><\/span>
\n\u30fb\u9759\u7684\u306a\u30e1\u30f3\u30d0\u3068static<\/strong><\/span><\/p>\n

\u3068\u3044\u3046\u57fa\u672c\u7684\u306a\u5185\u5bb9\u304b\u3089\u3001<\/p>\n

\u30fbstatic\u3092\u4f7f\u3046\u969b\u306e\u6ce8\u610f\u70b9<\/strong><\/span><\/p>\n

\u3067\u3001\u6c17\u3092\u3064\u3051\u306a\u304f\u3066\u306f\u306a\u3089\u306a\u3044\u70b9\u306b\u3064\u3044\u3066\u8a00\u53ca\u3057\u307e\u3059\u3002<\/p>\n

\u4eca\u56de\u306f\u305d\u3093\u306astatic\u3092\u4f7f\u7528\u3059\u308b\u65b9\u6cd5\u306b\u3064\u3044\u3066\u3001\u308f\u304b\u308a\u3084\u3059\u304f\u89e3\u8aac\u3057\u307e\u3059\uff01<\/p>\n

PHP\u306e\u30af\u30e9\u30b9\u306e\u69cb\u9020<\/h2>\n

static\u306b\u3064\u3044\u3066\u8aac\u660e\u3059\u308b\u524d\u306b\u3001\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u6307\u5411\u8a00\u8a9e\u3068\u3057\u3066\u306ePHP\u306b\u3064\u3044\u3066\u8efd\u304f\u5fa9\u7fd2\u3057\u3066\u304a\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n

class\u5ba3\u8a00<\/h3>\n

\u307e\u305a\u3001\u30af\u30e9\u30b9\u3068\u547c\u3070\u308c\u308b\u578b\u306e\u5ba3\u8a00\u3092\u884c\u3044\u307e\u3059\u3002<\/p>\n

class \uff08\u30af\u30e9\u30b9\u540d\uff09{\r\n    \u2026\r\n}<\/pre>\n
\u30af\u30e9\u30b9\u306f\u52d5\u4f5c\u3092\u8868\u3059\u30e1\u30bd\u30c3\u30c9<\/strong><\/span>\u3068\u3001\u30c7\u30fc\u30bf\u3092\u8868\u3059\u30d7\u30ed\u30d1\u30c6\u30a3<\/strong><\/span>\u304b\u3089\u306a\u308a\u307e\u3059\u3002<\/p>\n
\u3053\u306e\u30af\u30e9\u30b9\u3092\u3082\u3068\u306b\u3001\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u751f\u6210\u3057\u307e\u3059\u3002\u66f8\u5f0f\u306f\u4ee5\u4e0b\u306e\u901a\u308a\u3067\u3059\u3002<\/p>\n
(\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u540d\uff09 = new (\u30af\u30e9\u30b9\u540d\uff09<\/pre>\n
\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u751f\u6210\u3057\u305f\u3089<\/p>\n
(\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u540d\uff09->(\u30d7\u30ed\u30d1\u30c6\u30a3\u540d)\r\n(\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u540d\uff09->(\u30e1\u30bd\u30c3\u30c9\u540d)<\/pre>\n
\u3068\u3044\u3063\u305f\u5f62\u3067\u30d7\u30ed\u30d1\u30c6\u30a3\u3001\u306a\u3089\u3073\u306b\u30e1\u30bd\u30c3\u30c9\u306b\u30a2\u30af\u30bb\u30b9\u3057\u307e\u3059\u3002<\/p>\n
\u3067\u306f\u5b9f\u969b\u306b\u30b5\u30f3\u30d7\u30eb\u3092\u898b\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n
<?php\r\n\r\n\/\/ Student\u3068\u3044\u3046\u30af\u30e9\u30b9(\u578b)\u3092\u5ba3\u8a00\u3002\u30af\u30e9\u30b9\u306e1\u6587\u5b57\u76ee\u306f\u5927\u6587\u5b57\r\nclass Student {\r\n\r\n  \/\/ \u30d7\u30ed\u30d1\u30c6\u30a3\r\n  public $name;\r\n  public $age;\r\n  \/\/  \u30e1\u30bd\u30c3\u30c9\r\n  function showData(){\r\n      echo $this->name." is ".$this->age." years old.<br\/>";\r\n  }\r\n\r\n}\r\n\r\n\/\/\u30af\u30e9\u30b9Student\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u4f5c\u6210\r\n$tanaka = new Student;\r\n\r\n\/\/(\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u540d)->(\u30d7\u30ed\u30d1\u30c6\u30a3\u540d)  \u203b\u30d7\u30ed\u30d1\u30c6\u30a3\u306e"$"\u306f\u3064\u3051\u306a\u3044\r\n\/\/tanaka\u3068\u3044\u3046\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u306e\u30d7\u30ed\u30d1\u30c6\u30a3$name\u306b\u3001tanaka\u3092\u633f\u5165\u3002\r\n$tanaka->name = "tanaka";\r\n$tanaka->age = 12;\r\n\r\necho $tanaka->name."<br\/>";\r\necho $tanaka->age."<br\/>";\r\n\r\n$tanaka->showData();<\/pre>\n
tanaka\r\n12\r\ntanaka is 12 years old.<\/pre>\n
\u9759\u7684\u30e1\u30f3\u30d0\u3068\u52d5\u7684\u30e1\u30f3\u30d0<\/h3>\n
\u901a\u5e38\u30af\u30e9\u30b9\u3078\u30a2\u30af\u30bb\u30b9\u3059\u308b\u306b\u306f\u3001new<\/strong><\/span>\u6f14\u7b97\u5b50\u3092\u4f7f\u7528\u3057\u3066\u30af\u30e9\u30b9\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u751f\u6210\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n
\u3057\u304b\u3057\u3001\u30af\u30e9\u30b9\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u751f\u6210\u3057\u306a\u304f\u3066\u3082\u3001\u30af\u30e9\u30b9\u306e\u30e1\u30f3\u30d0\u306b\u30a2\u30af\u30bb\u30b9\u53ef\u80fd<\/strong><\/span>\u306a\u30e1\u30f3\u30d0\u306e\u3053\u3068\u3092\u9759\u7684\uff08static\uff09<\/strong><\/span>\u30e1\u30f3\u30d0\u3068\u547c\u3073\u307e\u3059\u3002<\/p>\n
\u8a00\u8a9e\u306b\u3088\u3063\u3066\u306f\u30af\u30e9\u30b9\u30e1\u30f3\u30d0<\/strong><\/span>\u3068\u8a00\u3046\u5834\u5408\u3082\u3042\u308a\u307e\u3059\u3002\u305d\u306e\u969b\u3001\u30e1\u30bd\u30c3\u30c9\u306e\u5834\u5408\u306f\u30af\u30e9\u30b9\u30e1\u30bd\u30c3\u30c9<\/strong><\/span>\u3001\u30d7\u30ed\u30d1\u30c6\u30a3\u3092\u30af\u30e9\u30b9\u5909\u6570<\/strong><\/span>\u306a\u3069\u3068\u547c\u3073\u307e\u3059\u3002<\/p>\n
\u9759\u7684\uff08static\uff09\u30e1\u30f3\u30d0\u3092\u4f7f\u7528\u3059\u308b\u305f\u3081\u306b\u306f\u3001\u5909\u6570\u3084\u95a2\u6570\u3001\u30e1\u30bd\u30c3\u30c9\u306e\u5148\u982d\u306bstatic\u3092\u8a18\u8ff0\u3059\u308b\u5fc5\u8981<\/strong><\/span>\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n
static\u306a\u5909\u6570\u3092\u5b9a\u7fa9\u3059\u308b\u5834\u5408\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u8a18\u8ff0\u3057\u307e\u3059\u3002<\/p>\n
\u30af\u30e9\u30b9\u540d{\r\n  static $\u5909\u6570\u540d = \u5024;\r\n  \/\/\u51e6\u7406\r\n}<\/pre>\n
\u307e\u305f\u3001static\u306e\u524d\u306b\u306fpublic<\/strong><\/span>\u3001private<\/strong><\/span>\u306a\u3069\u306e\u30a2\u30af\u30bb\u30b9\u6a29\u3092\u6307\u5b9a\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n
\u30a2\u30af\u30bb\u30b9\u6a29\u3092\u6307\u5b9a\u3059\u308c\u3070\u3001static\u306e\u30e1\u30f3\u30d0\u304c\u3069\u3053\u304b\u3089\u3067\u3082\u30a2\u30af\u30bb\u30b9\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u3063\u305f\u308a\u3001\u9006\u306b\u30a2\u30af\u30bb\u30b9\u3092\u9650\u5b9a\u3059\u308b<\/strong><\/span>\u3088\u3046\u306a\u3053\u3068\u304c\u53ef\u80fd\u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n
public static $\u5909\u6570\u540d = \u5024;<\/pre>\n
\u306a\u304aPHP\u306eclass\u306e\u3055\u307e\u3056\u307e\u306a\u51e6\u7406\u306b\u3064\u3044\u3066\u306f\u3001\u4ee5\u4e0b\u306e\u8a18\u4e8b\u306b\u307e\u3068\u3081\u3066\u3044\u307e\u3059\u306e\u3067\u3001\u305c\u3072\u53c2\u8003\u306b\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n
            \n                
\n                
\n                    
\n                    \n                    <\/div>\n                    
\n                    
PHP\u3067\u30af\u30e9\u30b9\u3092\u4f7f\u3044\u3053\u306a\u3059\u306b\u306f\uff1f\u57fa\u790e\u304b\u3089\u5fdc\u7528\u307e\u3067\u89e3\u8aac<\/div>\n                    
\u66f4\u65b0\u65e5\uff1a2024\u5e745\u67086\u65e5<\/div>\n                    <\/div>\n                <\/div>\n                <\/div>\n            <\/a>\n            
\n            \n                
\n                
\n                    
\n                    \n                    <\/div>\n                    
\n                    
\u3010PHP\u5165\u9580\u3011\u30af\u30e9\u30b9\u306e\u4f7f\u3044\u65b9\u307e\u3068\u3081<\/div>\n                    
\u66f4\u65b0\u65e5\uff1a2024\u5e745\u67086\u65e5<\/div>\n                    <\/div>\n                <\/div>\n                <\/div>\n            <\/a>\n            <\/p>\n
\u9759\u7684\u306a\u30e1\u30f3\u30d0\u3068static<\/h2>\n
\u3053\u3053\u3067\u306f\u9759\u7684\uff08static\uff09\u306a\u30e1\u30f3\u30d0\u306e\u4f7f\u7528\u65b9\u6cd5\u306b\u3064\u3044\u3066\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n
static\u5909\u6570\u306e\u4f7f\u3044\u65b9<\/h3>\n
\u901a\u5e38\u30af\u30e9\u30b9\u306e\u5909\u6570\u306f\u5916\u90e8\u304b\u3089\u53c2\u7167\u3059\u308b\u305f\u3081\u306b\u306f\u3001\u30af\u30e9\u30b9\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u751f\u6210<\/strong><\/span>\u3057\u3066\u30af\u30e9\u30b9\u306e\u95a2\u6570\u3084\u5909\u6570\u306a\u3069\u306b\u30a2\u30af\u30bb\u30b9\u3057\u307e\u3059\u3002<\/p>\n
\u3057\u304b\u3057\u3001\u524d\u8ff0\u3057\u305f\u3088\u3046\u306bstatic<\/strong><\/span>\u3092\u4f7f\u7528\u3059\u308c\u3070\u3001\u30af\u30e9\u30b9\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u751f\u6210\u3057\u306a\u3044\u3067\u76f4\u63a5\u30af\u30e9\u30b9\u306e\u30e1\u30f3\u30d0\u306b\u30a2\u30af\u30bb\u30b9<\/strong><\/span>\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n
\u3053\u308c\u306f\u3001static\u3092\u6307\u5b9a\u3057\u305f\u5909\u6570\u3084\u95a2\u6570\u30fb\u30e1\u30bd\u30c3\u30c9\u306f\u30af\u30e9\u30b9\u305d\u306e\u3082\u306e\u306b\u5c5e\u3059\u308b<\/strong><\/span>\u3053\u3068\u306a\u308a\u3001\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3068\u306e\u95a2\u308f\u308a\u304c\u306a\u304f\u306a\u308b\u304b\u3089\u3067\u3059\u3002<\/p>\n
\u4ee5\u4e0b\u306bstatic\u306a\u5909\u6570\u3092\u5b9a\u7fa9\u3057\u3066\u3001\u30af\u30e9\u30b9\u5916\u304b\u3089\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u751f\u6210\u3057\u306a\u3044\u3067\u53c2\u7167\u3059\u308b\u65b9\u6cd5\u3092\u8a18\u8ff0\u3057\u307e\u3059\u3002<\/p>\n
<?php\r\n \r\nclass Foo {\r\n \r\n  \/\/\u9759\u7684\u5909\u6570\u3092\u4f5c\u6210\u3059\u308b\r\n  public static $val = 10;\r\n}\r\n \r\n\/\/\u9759\u7684\u5909\u6570\u3092\u53c2\u7167\u3059\u308b\r\n$value = Foo::$val;\r\necho $value;\r\n \r\n?><\/pre>\n
\u5b9f\u884c\u7d50\u679c<\/p>\n
10<\/pre>\n
\u5b9f\u884c\u7d50\u679c\u306e\u3068\u304a\u308a\u3001\u30af\u30e9\u30b9Foo\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u751f\u6210\u3057\u306a\u3044\u3067\u3001\u30af\u30e9\u30b9\u5185\u306e\u9759\u7684\u30e1\u30f3\u30d0\u306b\u30a2\u30af\u30bb\u30b9\u3067\u304d\u308b\u3053\u3068\u304c\u308f\u304b\u308a\u307e\u3059\u306d\uff01<\/p>\n
static\u306a\u5909\u6570\u306e\u6d3b\u7528\u6cd5\u3068\u3057\u3066\u3001\u30ed\u30fc\u30ab\u30eb\u306a\u5909\u6570\u3067\u306f\u95a2\u6570\u5185\u3067\u30bb\u30c3\u30c8\u3057\u305f\u5024\u306f\u95a2\u6570\u306e\u5916\u306b\u51fa\u305f\u3089\u5024\u306f\u30ea\u30bb\u30c3\u30c8<\/strong><\/span>\u3055\u308c\u3066\u3057\u307e\u3044\u307e\u3059\u304c\u3001static\u306a\u5909\u6570\u3092\u95a2\u6570\u5185\u3067\u5b9a\u7fa9\u3057\u305f\u5834\u5408\u3001\u30bb\u30c3\u30c8\u3057\u305f\u5024\u306f\u51e6\u7406\u304c\u95a2\u6570\u5916\u306b\u79fb\u3063\u3066\u3082\u4fdd\u6301<\/strong><\/span>\u3055\u308c\u307e\u3059\u3002<\/p>\n
\u4ee5\u4e0b\u306e\u4f8b\u3067\u306f\u3001\u95a2\u6570\u3092\u547c\u3073\u51fa\u3059\u3054\u3068\u306bstatic\u306a\u5909\u6570\u306e\u5024\u3092\u30a4\u30f3\u30af\u30ea\u30e1\u30f3\u30c8\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n
<?php\r\n \r\nfunction Foo(){\r\n  static $val = 0;\r\n  echo $val.'<br>';\r\n \r\n  $val++;\r\n}\r\n \r\nFoo();\r\nFoo();\r\nFoo();\r\n \r\n?><\/pre>\n
\u5b9f\u884c\u7d50\u679c<\/p>\n
0\r\n1\r\n2<\/pre>\n
\u5b9f\u884c\u7d50\u679c\u306e\u3068\u304a\u308a\u3001\u95a2\u6570\u3092\u547c\u3073\u51fa\u3059\u3054\u3068\u306b\u5024\u304c\u30a4\u30f3\u30af\u30ea\u30e1\u30f3\u30c8\u3055\u308c\u3066\u3044\u308b\u3053\u3068\u304c\u308f\u304b\u308a\u307e\u3059\u306d\uff01<\/p>\n
\u3053\u308c\u304cstatic\u3092\u6307\u5b9a\u3057\u306a\u3044\u30ed\u30fc\u30ab\u30eb\u306a\u5909\u6570\u3060\u3063\u305f\u3089\u3001\u6bce\u56de0\u304c\u51fa\u529b\u3055\u308c\u3066\u3057\u307e\u3044\u307e\u3059<\/strong><\/span>\u3002<\/p>\n
\u306a\u304a\u3001\u30af\u30e9\u30b9\u5185\u3067\u751f\u6210\u3057\u305fstatic\u3067\u306a\u3044\u901a\u5e38\u306e\u5909\u6570\u3092\u9759\u7684\u306b\u30a2\u30af\u30bb\u30b9\u3057\u3088\u3046\u3068\u3059\u308b\u3068\u3001\u30a8\u30e9\u30fc\u304c\u767a\u751f<\/strong><\/span>\u3057\u307e\u3059\u306e\u3067\u6ce8\u610f\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n
\u9006\u306b\u9759\u7684\u306a\u30e1\u30f3\u30d0\u306f\u3001\u30af\u30e9\u30b9\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u304b\u3089\u53c2\u7167\u3059\u308b\u3068\u304d\u306b\u4f7f\u7528\u3059\u308b\u77e2\u5370\u6f14\u7b97\u5b50-><\/strong><\/span>\u306b\u3088\u308b\u30a2\u30af\u30bb\u30b9\u306f\u3067\u304d\u307e\u305b\u3093\u3002<\/p>\n
static\u306a\u914d\u5217\u306e\u6307\u5b9a\u65b9\u6cd5<\/h3>\n
\u914d\u5217\u3092static\u306a\u30e1\u30f3\u30d0<\/strong><\/span>\u3068\u3057\u3066\u5b9a\u7fa9\u3059\u308b\u3053\u3068\u3082\u53ef\u80fd\u3067\u3059\u3002<\/p>\n
\u4ee5\u4e0b\u306b\u914d\u5217\u3092static\u3068\u3057\u3066\u5b9a\u7fa9\u3057\u3066\u3001\u30af\u30e9\u30b9\u5916\u304b\u3089\u53c2\u7167\u3059\u308b\u65b9\u6cd5\u3092\u8a18\u8ff0\u3057\u307e\u3059\u3002<\/p>\n
<?php\r\n \r\nclass fruitsClass{\r\n  \/\/\u9759\u7684\u306a\u914d\u5217\u3092\u5b9a\u7fa9\u3059\u308b\r\n  public static $fruits_array = ['apple', 'orange', 'melon', 'banana', 'pineapple'];\r\n}\r\n \r\n\/\/\u9759\u7684\u306a\u914d\u5217\u3092\u53c2\u7167\u3059\u308b\r\n$array = fruitsClass::$fruits_array;\r\n \r\nforeach($array as $value){\r\n  echo $value;\r\n  echo '<br>';\r\n}\r\n \r\n?><\/pre>\n
\u5b9f\u884c\u7d50\u679c<\/p>\n
apple\r\norange\r\nmelon\r\nbanana\r\npineapple<\/pre>\n
\u5b9f\u884c\u7d50\u679c\u306e\u3068\u304a\u308a\u3001\u914d\u5217\u3082\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u5316\u3057\u306a\u3044\u3067static\u306a\u30e1\u30f3\u30d0\u3068\u3057\u3066\u30a2\u30af\u30bb\u30b9\u3067\u304d\u308b<\/strong><\/span>\u3053\u3068\u304c\u308f\u304b\u308a\u307e\u3057\u305f\u306d\u3002<\/p>\n
\u914d\u5217\u3082static\u4fee\u98fe\u5b50\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u306b\u3088\u308a\u3001\u30ed\u30fc\u30ab\u30eb\u304b\u3089\u5916\u306b\u51e6\u7406\u304c\u79fb\u884c\u3057\u3066\u3082\u3001\u5024\u306f\u305d\u306e\u307e\u307e\u4fdd\u6301<\/strong><\/span>\u3055\u308c\u307e\u3059\u306e\u3067\u3001\u51e6\u7406\u306b\u3088\u3063\u3066\u4f7f\u3044\u5206\u3051\u308b\u3068\u3088\u3044\u3067\u3057\u3087\u3046\u3002<\/p>\n
\u306a\u304a\u3001\u5909\u6570\u3084\u914d\u5217\u306a\u3069\u3092\u30af\u30e9\u30b9\u5185\u3067\u5b9a\u6570\u5316\u3057\u305f\u3044\u5834\u5408\u306fconst\u3092\u4f7f\u7528\u3057\u307e\u3059\u3002<\/p>\n
const\u306e\u4f7f\u3044\u65b9\u306b\u3064\u3044\u3066\u306f\u3001\u4ee5\u4e0b\u306e\u8a18\u4e8b\u3067\u8a73\u3057\u304f\u89e3\u8aac\u3057\u3066\u3044\u307e\u3059\uff01<\/p>\n            \n                
\n                
\n                    
\n                    \n                    <\/div>\n                    
\n                    
\u3010PHP\u5165\u9580\u3011define\u3067\u5b9a\u6570\u3092\u5b9a\u7fa9\u3059\u308b\u65b9\u6cd5<\/div>\n                    
\u66f4\u65b0\u65e5\uff1a2024\u5e745\u67086\u65e5<\/div>\n                    <\/div>\n                <\/div>\n                <\/div>\n            <\/a>\n            \n
static\u306a\u30e1\u30bd\u30c3\u30c9<\/h3>\n
static\u3092\u4f7f\u7528\u3057\u3066\u30e1\u30bd\u30c3\u30c9\u3092\u9759\u7684\u306b\u30a2\u30af\u30bb\u30b9<\/strong><\/span>\u3059\u308b\u3053\u3068\u3082\u3067\u304d\u307e\u3059\u3002<\/p>\n
\u4ee5\u4e0b\u306bstatic\u306a\u30e1\u30bd\u30c3\u30c9\u3092\u5b9a\u7fa9\u3057\u3066\u3001\u30af\u30e9\u30b9\u5916\u304b\u3089\u30a2\u30af\u30bb\u30b9\u3059\u308b\u65b9\u6cd5\u3092\u8a18\u8ff0\u3057\u307e\u3059\u3002<\/p>\n
<?php\r\n\r\nclass SamuraiClass {\r\n\r\n  \/\/\u9759\u7684\u306a\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3059\u308b\r\n  public static function SamuraiMethod($val) {\r\n    $val = 'Samurai '.$val;\r\n    return $val;\r\n  }\r\n}\r\n\r\n\/\/\u9759\u7684\u306a\u30e1\u30bd\u30c3\u30c9\u3092\u53c2\u7167\u3059\u308b\r\n$name = SamuraiClass::SamuraiMethod('Engineer');\r\n\r\necho $name;\r\n \r\n?><\/pre>\n
\u5b9f\u884c\u7d50\u679c<\/p>\n
Samurai Engineer<\/pre>\n
\u3053\u306e\u3088\u3046\u306bstatic\u3092\u4f7f\u7528\u3059\u308c\u3070\u3001\u6c17\u8efd\u306b\u95a2\u6570\u3084\u30e1\u30bd\u30c3\u30c9\u306b\u30a2\u30af\u30bb\u30b9\u3059\u308b\u3053\u3068\u304c\u53ef\u80fd\u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n
static\u3092\u4f7f\u3046\u969b\u306e\u6ce8\u610f\u70b9<\/h2>\n
\u3053\u306e\u3088\u3046\u306b\u4fbf\u5229\u306astatic\u3067\u3059\u304c\u3001\u4f7f\u3046\u3068\u304d\u306b\u306f\u6ce8\u610f\u3057\u306a\u304f\u3066\u306f\u306a\u3089\u306a\u3044\u70b9<\/strong><\/span>\u304c\u3044\u304f\u3064\u304b\u3042\u308a\u307e\u3059\u3002<\/p>\n
\u4ee5\u4e0b\u3001\u305d\u308c\u3089\u306b\u3064\u3044\u3066\u8aac\u660e\u3057\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n
\u52d5\u7684\u30e1\u30f3\u30d0\u3068\u9759\u7684\u30e1\u30f3\u30d0\u306e\u95a2\u4fc2\u6027<\/h3>\n
\u9759\u7684\u306a\u30e1\u30bd\u30c3\u30c9\u304a\u3088\u3073\u9759\u7684\u306a\u30d7\u30ed\u30d1\u30c6\u30a3\u306f\u3001\u52d5\u7684\u306a\u30e1\u30bd\u30c3\u30c9\u30fb\u30d7\u30ed\u30d1\u30c6\u30a3\u306b\u30a2\u30af\u30bb\u30b9<\/strong><\/span>\u3067\u304d\u307e\u3059\u3002<\/p>\n
\u3057\u304b\u3057\u3001\u52d5\u7684\u306a\u30e1\u30bd\u30c3\u30c9\u30fb\u30d7\u30ed\u30d1\u30c6\u30a3\u304b\u3089\u9759\u7684\u30e1\u30bd\u30c3\u30c9\u3001\u30d7\u30ed\u30d1\u30c6\u30a3\u306b\u30a2\u30af\u30bb\u30b9\u3059\u308b\u3053\u3068\u306f\u51fa\u6765\u307e\u305b\u3093\u3002<\/p>\n
\u4f8b\u3048\u3070\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u30af\u30e9\u30b9\u306f\u30a8\u30e9\u30fc\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n
<?php\r\n\r\nclass Foo{\r\n    public static $n = "static";\r\n    public $m = "instance";\r\n    \/\/  \u9759\u7684\u30e1\u30bd\u30c3\u30c9\u304b\u3089\u52d5\u7684\u30d7\u30ed\u30d1\u30c6\u30a3\u3092\u547c\u3073\u51fa\u3059\r\n    public static function show(){\r\n        echo Foo::$n;    \/\/  \u9759\u7684\u30d7\u30ed\u30d1\u30c6\u30a3\r\n        echo $this->m;    \/\/  \u52d5\u7684\u30d7\u30ed\u30d1\u30c6\u30a3\r\n    }\r\n    \r\n}\r\n\r\nFoo::show();<\/pre>\n
Fatal static Fatal error: Using $this when not in object context in \/home\/ubuntu\/workspace\/Err.php on line 9<\/pre>\n
\u52d5\u7684\u30d7\u30ed\u30d1\u30c6\u30a3\u306f\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u4f5c\u3089\u306a\u3051\u308c\u3070\u4f7f\u3048\u307e\u305b\u3093\u3002<\/p>\n
\u7d99\u627f\u3068\u9759\u7684\u30e1\u30bd\u30c3\u30c9<\/h3>\n
\u307e\u305f\u3001\u7d99\u627f\u306e\u969b\u306b\u3082\u6c17\u3092\u3064\u3051\u306a\u304f\u3066\u306f\u306a\u3089\u306a\u3044\u70b9<\/strong><\/span>\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n
\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u30e1\u30bd\u30c3\u30c9\u306b\u306f\u30aa\u30fc\u30d0\u30fc\u30e9\u30a4\u30c9<\/strong><\/span>\u3068\u8a00\u3046\u6982\u5ff5\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n
\u3053\u308c\u306f\u3001\u30b5\u30d6\u30af\u30e9\u30b9\u306e\u4e2d\u3067\u30b9\u30fc\u30d1\u30fc\u30af\u30e9\u30b9\u306e\u30e1\u30bd\u30c3\u30c9\u3092\u4e0a\u66f8\u304d<\/strong><\/span>\u3067\u304d\u308b\u3068\u3044\u3046\u3082\u306e\u3067\u3059\u304c\u3001\u9759\u7684\u30e1\u30bd\u30c3\u30c9\u306e\u5834\u5408\u306f\u3053\u308c\u304c\u5f53\u3066\u306f\u307e\u308a\u307e\u305b\u3093<\/strong><\/span>\u3002<\/p>\n
<?php\r\n\r\n\/\/ \u30b9\u30fc\u30d1\u30fc\u30af\u30e9\u30b9\r\nclass MyParent\r\n{\r\n    static function foo()\r\n    {\r\n        return "Super";\r\n    }\r\n\r\n    static function bar()\r\n    {\r\n        echo self::foo() ."<br\/>";\r\n    }\r\n}\r\n\r\n\/\/ \u30b5\u30d6\u30af\u30e9\u30b9\r\nclass MyChild extends  MyParent\r\n{\r\n    \/\/ \u30b9\u30fc\u30d1\u30fc\u306e\u30e1\u30bd\u30c3\u30c9\u3092\u30aa\u30fc\u30d0\u30fc\u30e9\u30a4\u30c9\r\n    static function foo()\r\n    {\r\n        return "Sub";\r\n    }\r\n}\r\n\r\nMyParent::bar();    # <= "Super"\u3068\u51fa\u529b\u3057\u3066\u307b\u3057\u3044\r\nMyChild::bar();     # <= "Sub"\u3068\u51fa\u529b\u3057\u3066\u307b\u3057\u3044<\/pre>\n
Super\r\nSuper<\/pre>\n
\u30b5\u30d6\u30af\u30e9\u30b9\u3067\u30aa\u30fc\u30d0\u30fc\u30e9\u30a4\u30c9\u3057\u305ffoo()\u304c\u547c\u3070\u308c\u305a\u3001\u30b9\u30fc\u30d1\u30fc\u30af\u30e9\u30b9\u306efoo()\u304c\u547c\u3070\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n
self<\/strong><\/span>\u306f\u3001self::\u304c\u8a18\u8f09\u3055\u308c\u305f\u30af\u30e9\u30b9\u5185\u306e\u30d7\u30ed\u30d1\u30c6\u30a3\u3084\u30e1\u30bd\u30c3\u30c9\u3092\u547c\u3073\u51fa\u3059<\/strong><\/span>\u306e\u306b\u4f7f\u308f\u308c\u307e\u3059\u3002<\/p>\n
\u3057\u305f\u304c\u3063\u3066\u3001\u30b9\u30fc\u30d1\u30fc\u30af\u30e9\u30b9\u5185\u3067\u306f\u3001\u201dParent\u201d\u304c\u3001\u30b5\u30d6\u30af\u30e9\u30b9\u5185\u3067\u306f\u201dSub\u201d\u304c\u53d6\u5f97\u3055\u308c\u308b\u306f\u305a\u3067\u3059\u3002<\/p>\n
\u3068\u3053\u308d\u304c\u5b9f\u969b\u306f\u3001\u30b5\u30d6\u30af\u30e9\u30b9\u304b\u3089\u30b9\u30fc\u30d1\u30fc\u30af\u30e9\u30b9\u306e\u9759\u7684\u30e1\u30bd\u30c3\u30c9\u3092\u547c\u3073\u51fa\u3057\u305f\u5834\u5408\u3001\u305d\u306e\u30e1\u30bd\u30c3\u30c9\u306f\u89aa\u30af\u30e9\u30b9\u306e\u30b3\u30f3\u30c6\u30ad\u30b9\u30c8\u3067\u5b9f\u884c\u3055\u308c\u3066\u3057\u307e\u3044\u307e\u3059\u3002<\/p>\n
\u305d\u306e\u305f\u3081\u3001\u30b5\u30d6\u30af\u30e9\u30b9\u304b\u3089\u547c\u3073\u51fa\u3057\u305f\u30b9\u30fc\u30d1\u30fc\u30af\u30e9\u30b9\u306estatic\u306a\u30e1\u30bd\u30c3\u30c9\u5185\u3067\u30b5\u30d6\u30af\u30e9\u30b9\u3067\u30aa\u30fc\u30d0\u30fc\u30e9\u30a4\u30c9\u3055\u308c\u305f\u30e1\u30bd\u30c3\u30c9\u3092\u547c\u3073\u51fa\u305d\u3046\u3068\u3057\u3066\u3082\u3001\u89aa\u30af\u30e9\u30b9\u3067\u5b9a\u7fa9\u3055\u308c\u305f\u3082\u306e\u304c\u547c\u3070\u308c\u308b<\/strong><\/span>\u7d50\u679c\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n
\u3053\u306e\u3088\u3046\u306b\u3001static\u3092\u4f7f\u3046\u969b\u306b\u306f\u610f\u5916\u306a\u843d\u3068\u3057\u7a74<\/strong><\/span>\u304c\u3042\u308a\u307e\u3059\u306e\u3067\u3001\u6c17\u3092\u3064\u3051\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n
\u306a\u304a\u3001PHP\u306e\u7d99\u627f\u306b\u3064\u3044\u3066\u306f\u3001\u4ee5\u4e0b\u306e\u8a18\u4e8b\u3067\u8a73\u3057\u304f\u8aac\u660e\u3057\u3066\u3044\u307e\u3059\u3002\u8208\u5473\u306e\u3042\u308b\u65b9\u306f\u3053\u3061\u3089\u3082\u3042\u308f\u305b\u3066\u307f\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n            \n                
\n                
\n                    
\n                    \n                    <\/div>\n                    
\n                    
\u3010PHP\u5165\u9580\u3011\u7d99\u627f(extends)\u3001\u30c8\u30ec\u30a4\u30c8(trait)\u3092\u4f7f\u3044\u3053\u306a\u305d\u3046\uff01<\/div>\n                    
\u66f4\u65b0\u65e5\uff1a2024\u5e745\u67086\u65e5<\/div>\n                    <\/div>\n                <\/div>\n                <\/div>\n            <\/a>\n            \n
\u307e\u3068\u3081<\/h2>\n
\u3053\u3053\u3067\u306f\u9759\u7684\u30e1\u30f3\u30d0\u306e\u610f\u5473\u3084static\u3092\u4f7f\u7528\u3057\u305f\u5909\u6570\u3084\u30af\u30e9\u30b9\u3001\u30e1\u30bd\u30c3\u30c9\u3001\u914d\u5217\u306a\u3069\u306e\u4f7f\u3044\u65b9\u306b\u3064\u3044\u3066\u89e3\u8aac\u3057\u307e\u3057\u305f\u3002<\/p>\n
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\u3082\u3057static<\/strong><\/span>\u306e\u4f7f\u3044\u65b9\u5fd8\u308c\u3066\u3057\u307e\u3063\u305f\u3089\u3001\u3053\u306e\u8a18\u4e8b\u3092\u601d\u3044\u51fa\u3057\u3066\u304f\u3060\u3055\u3044\u306d\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
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