{"id":30273,"date":"2023-12-17T03:24:38","date_gmt":"2023-08-26T10:22:11","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e5%85%b3%e4%ba%8ephp%e7%9a%84%e5%b8%b8%e9%87%8f\/"},"modified":"2025-08-12T18:24:12","modified_gmt":"2025-08-12T10:24:12","slug":"%e5%85%b3%e4%ba%8ephp%e7%9a%84%e5%b8%b8%e9%87%8f","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e5%85%b3%e4%ba%8ephp%e7%9a%84%e5%b8%b8%e9%87%8f\/","title":{"rendered":"\u5173\u4e8ePHP\u7684\u5e38\u91cf"},"content":{"rendered":"

\u201c\u5b9a\u6570\u201d\u5728\u4e2d\u6587\u4e2d\u53ef\u4ee5\u7528\u4ee5\u4e0b\u65b9\u5f0f\u8868\u8fbe\uff1a<\/h1>\n

\u5728\u5ba3\u8a00\u65f6\u786e\u5b9a\u7684\u503c\u65e0\u6cd5\u91cd\u65b0\u5b9a\u4e49\u3002<\/p>\n

\u5728PHP\u4e2d\u5b9a\u4e49\u5e38\u91cf\u7684\u4e24\u79cd\u65b9\u6cd5<\/h2>\n

\u4f7f\u7528define()\u51fd\u6570\u6765\u5b9a\u4e49\u5e38\u91cf\u3002<\/h3>\n
define<\/span>(<\/span>'\u5b9a\u6570\u540d'<\/span>,<\/span> '\u5024'<\/span>);<\/span>\r\n<\/code><\/pre>\n
PHP7\u4ee5\u540e\u53ef\u4ee5\u5b9a\u4e49\u6570\u7ec4\u5e38\u91cf\u3002<\/p>\n
\/\/ \u5b9a\u6570\u3092\u30af\u30e9\u30b9\u5916\u306b\u5b9a\u7fa9<\/span>\r\ndefine<\/span>(<\/span>'CONSTANT'<\/span>,<\/span> [<\/span>'key1'<\/span> =><\/span> 'hoge'<\/span>,<\/span> 'key2'<\/span> =><\/span> 'fuga'<\/span>]);<\/span>\r\nclass<\/span> Sample<\/span>\r\n{<\/span>\r\n    function<\/span> printConst<\/span>()<\/span>\r\n    {<\/span>\r\n        \/\/ \u30af\u30e9\u30b9\u5185\u304b\u3089\u5b9a\u6570\u306b\u30a2\u30af\u30bb\u30b9\u3059\u308b\u5834\u5408<\/span>\r\n        print_r<\/span>(<\/span>CONSTANT<\/span>);<\/span>\r\n    }<\/span>\r\n}<\/span>\r\n$sample<\/span> =<\/span> new<\/span> Sample<\/span>();<\/span>\r\n$sample<\/span>-><\/span>printConst<\/span>();<\/span>                 \/\/ CONSTANT\u304c\u51fa\u529b\u3055\u308c\u308b<\/span>\r\n\/\/ \u30af\u30e9\u30b9\u5916\u304b\u3089\u5b9a\u6570\u306b\u30a2\u30af\u30bb\u30b9\u3059\u308b\u5834\u5408\uff08\u540c\u3058\uff09<\/span>\r\nprint_r<\/span>(<\/span>CONSTANT<\/span>);<\/span>                     \/\/ CONSTANT\u304c\u51fa\u529b\u3055\u308c\u308b<\/span>\r\n<\/code><\/pre>\n
\u5728JavaScript\u4e2d\u901a\u8fc7\u4f7f\u7528const\u5173\u952e\u5b57\u6765\u5b9a\u4e49\u5e38\u91cf\u3002<\/h3>\n
const<\/span> '\u5b9a\u6570\u540d'<\/span> =<\/span> '\u5024'<\/span>;<\/span>\r\n<\/code><\/pre>\n
\u53ef\u4ee5\u5728PHP5.3\u4ee5\u4e0a\u7248\u672c\u4f7f\u7528\u3002
\nPHP7\u4ee5\u540e\u53ef\u4ee5\u5b9a\u4e49\u6570\u7ec4\u5e38\u91cf\u3002
\nconst\u53ef\u4ee5\u5b9a\u4e49\u7c7b\u5e38\u91cf\u3002<\/p>\n
class<\/span> Sample<\/span>\r\n{<\/span>\r\n    \/\/ \u5b9a\u6570\u3092\u30af\u30e9\u30b9\u5185\u306b\u5b9a\u7fa9<\/span>\r\n    const<\/span> CONSTANT<\/span> =<\/span> [<\/span>'key1'<\/span> =><\/span> 'hoge'<\/span>,<\/span> 'key2'<\/span> =><\/span> 'fuga'<\/span>];<\/span>\r\n    function<\/span> printConst<\/span>()<\/span>\r\n    {<\/span>\r\n        \/\/ \u30af\u30e9\u30b9\u5185\u304b\u3089\u5b9a\u6570\u306b\u30a2\u30af\u30bb\u30b9\u3059\u308b\u5834\u5408<\/span>\r\n        print_r<\/span>(<\/span>self<\/span>::<\/span>CONSTANT<\/span>);<\/span>\r\n    }<\/span>\r\n}<\/span>\r\n$sample<\/span> =<\/span> new<\/span> Sample<\/span>();<\/span>\r\n$sample<\/span>-><\/span>printConst<\/span>();<\/span>          \/\/ CONSTANT\u304c\u51fa\u529b\u3055\u308c\u308b<\/span>\r\n\/\/ \u30af\u30e9\u30b9\u5916\u304b\u3089\u5b9a\u6570\u306b\u30a2\u30af\u30bb\u30b9\u3059\u308b\u5834\u5408<\/span>\r\nprint_r<\/span>(<\/span>Sample<\/span>::<\/span>CONSTANT<\/span>);<\/span>      \/\/ CONSTANT\u304c\u51fa\u529b\u3055\u308c\u308b<\/span>\r\n<\/code><\/pre>\n
define() \u548c const \u7684\u533a\u522b\u662f\u4ec0\u4e48\uff1f<\/h2>\n
define() \u306f\u95a2\u6570\u306a\u306e\u3067\u3001const \u306e\u65b9\u304c\u9ad8\u901f\u306b\u51e6\u7406\u3055\u308c\u308b\u3002<\/p>\n
define() \u306f\u5909\u6570\u3084\u95a2\u6570\u306e\u623b\u308a\u5024\u3092\u4f7f\u3048\u3066\u3001const \u3067\u306f\u4f7f\u3048\u306a\u3044\u3002<\/p>\n
$func<\/span> =<\/span> function<\/span>(){<\/span>\r\n    return<\/span> '\u5b9a\u6570'<\/span>;<\/span>\r\n};<\/span>\r\ndefine<\/span>(<\/span>'CONST_DEFINE'<\/span>,<\/span> $func<\/span>());<\/span>\r\necho<\/span> CONST_DEFINE<\/span>;<\/span>  \/\/ \u5b9a\u6570\u304c\u51fa\u529b\u3055\u308c\u308b<\/span>\r\n\/\/ \u5b9a\u6570\u5f0f\u306b\u7121\u52b9\u306a\u3082\u306e\u304c\u542b\u307e\u308c\u3066\u3044\u308b\u3068\u3044\u3046\u4ee5\u4e0b\u306e\u30a8\u30e9\u30fc\u3067\u7d42\u4e86\u3059\u308b<\/span>\r\n\/\/ Fatal error: Constant expression contains invalid <\/span>\r\nconst<\/span> CONST_CONST<\/span> =<\/span> $func<\/span>();<\/span>\r\necho<\/span> CONST_CONST<\/span>;<\/span>   \r\n<\/code><\/pre>\n
define() \u306f if \u6587\u3084 function \u306e\u4e2d\u3067\u3082\u4f7f\u3048\u308b\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u201c\u5b9a\u6570\u201d\u5728\u4e2d\u6587\u4e2d\u53ef\u4ee5\u7528\u4ee5\u4e0b\u65b9\u5f0f\u8868\u8fbe\uff1a \u5728\u5ba3\u8a00\u65f6\u786e\u5b9a\u7684\u503c\u65e0\u6cd5\u91cd\u65b0\u5b9a\u4e49\u3002 \u5728PHP\u4e2d\u5b9a\u4e49\u5e38\u91cf\u7684\u4e24\u79cd\u65b9\u6cd5 \u4f7f\u7528def […]<\/p>\n","protected":false},"author":8,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[227],"class_list":["post-30273","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-227"],"yoast_head":"\n\u5173\u4e8ePHP\u7684\u5e38\u91cf - Blog - Silicon Cloud<\/title>\n<meta name=\"description\" content=\"\u5173\u4e8e\u5173\u4e8ePHP\u7684\u5e38\u91cf\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\u4e8ephp\u7684\u5e38\u91cf\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\u5173\u4e8ePHP\u7684\u5e38\u91cf\" \/>\n<meta property=\"og:description\" content=\"\u5173\u4e8e\u5173\u4e8ePHP\u7684\u5e38\u91cf\u7684\u6280\u672f\u6587\u7ae0\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/zh\/blog\/\u5173\u4e8ephp\u7684\u5e38\u91cf\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - 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