{"id":46915,"date":"2024-12-02T13:21:11","date_gmt":"2024-12-02T05:21:11","guid":{"rendered":"https:\/\/fwq.ai\/blog\/46915\/"},"modified":"2024-12-02T13:21:11","modified_gmt":"2024-12-02T05:21:11","slug":"php%e5%87%bd%e6%95%b0%e5%9d%97%e4%bd%9c%e7%94%a8%e5%9f%9f%e9%99%90%e5%88%b6%e5%af%b9%e5%8f%98%e9%87%8f%e7%9a%84%e8%ae%bf%e9%97%ae%e6%9c%89%e4%bd%95%e5%bd%b1%e5%93%8d","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/46915\/","title":{"rendered":"PHP\u51fd\u6570\u5757\u4f5c\u7528\u57df\u9650\u5236\u5bf9\u53d8\u91cf\u7684\u8bbf\u95ee\u6709\u4f55\u5f71\u54cd"},"content":{"rendered":"<p><b><\/b> <\/p>\n<h1>PHP\u51fd\u6570\u5757\u4f5c\u7528\u57df\u9650\u5236\u5bf9\u53d8\u91cf\u7684\u8bbf\u95ee\u6709\u4f55\u5f71\u54cd<\/h1>\n<p>\u672c\u7bc7\u6587\u7ae0\u4e3b\u8981\u662f\u7ed3\u5408\u6211\u4e4b\u524d\u9762\u8bd5\u7684\u5404\u79cd\u7ecf\u5386\u548c\u5b9e\u6218\u5f00\u53d1\u4e2d\u9047\u5230\u7684\u95ee\u9898\u89e3\u51b3\u7ecf\u9a8c\u6574\u7406\u7684\uff0c\u5e0c\u671b\u8fd9\u7bc7\u300aPHP\u51fd\u6570\u5757\u4f5c\u7528\u57df\u9650\u5236\u5bf9\u53d8\u91cf\u7684\u8bbf\u95ee\u6709\u4f55\u5f71\u54cd\u300b\u5bf9\u4f60\u6709\u5f88\u5927\u5e2e\u52a9\uff01\u6b22\u8fce\u6536\u85cf\uff0c\u5206\u4eab\u7ed9\u66f4\u591a\u7684\u9700\u8981\u7684\u670b\u53cb\u5b66\u4e60~<\/p>\n<p>\u51fd\u6570\u5757\u4f5c\u7528\u57df\u9650\u5236\u4e86\u53d8\u91cf\u8bbf\u95ee\u6743\u9650\uff0c\u786e\u4fdd\u51fd\u6570\u5757\u5185\u58f0\u660e\u7684\u53d8\u91cf\u4ec5\u5728\u5757\u5185\u53ef\u7528\uff0c\u800c\u51fd\u6570\u5757\u5916\u7684\u53d8\u91cf\u5728\u5757\u5185\u53ef\u8bbf\u95ee\uff0c\u9664\u975e\u5728\u5757\u5185\u91cd\u65b0\u58f0\u660e\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20241025\/1729854272671b7b401fda2.jpg\" class=\"aligncenter\" title=\"PHP\u51fd\u6570\u5757\u4f5c\u7528\u57df\u9650\u5236\u5bf9\u53d8\u91cf\u7684\u8bbf\u95ee\u6709\u4f55\u5f71\u54cd\u63d2\u56fe\" alt=\"PHP\u51fd\u6570\u5757\u4f5c\u7528\u57df\u9650\u5236\u5bf9\u53d8\u91cf\u7684\u8bbf\u95ee\u6709\u4f55\u5f71\u54cd\u63d2\u56fe\" \/><\/p>\n<p><strong>PHP \u51fd\u6570\u5757\u4f5c\u7528\u57df\u9650\u5236\u5bf9\u53d8\u91cf\u7684\u8bbf\u95ee\u6709\u4f55\u5f71\u54cd<\/strong><\/p>\n<p><strong>\u5f15\u8a00<\/strong><\/p>\n<p>\u5728 PHP \u4e2d\uff0c\u53d8\u91cf\u7684\u4f5c\u7528\u57df\u5b9a\u4e49\u4e86\u53d8\u91cf\u7684\u53ef\u8bbf\u95ee\u6027\u3002\u51fd\u6570\u5757\u4f5c\u7528\u57df\u662f\u4e00\u79cd\u9650\u5b9a\u53d8\u91cf\u8bbf\u95ee\u6743\u9650\u7684\u65b9\u5f0f\uff0c\u672c\u6587\u5c06\u63a2\u8ba8\u51fd\u6570\u5757\u4f5c\u7528\u57df\u5982\u4f55\u5f71\u54cd\u5bf9\u53d8\u91cf\u7684\u8bbf\u95ee\u3002<\/p>\n<p><strong>\u51fd\u6570\u5757\u4f5c\u7528\u57df<\/strong><\/p>\n<p>\u51fd\u6570\u5757\u662f\u4e00\u5bf9\u5927\u62ec\u53f7\u5305\u88f9\u7684\u4ee3\u7801\u5757\uff0c\u5b83\u521b\u5efa\u4e86\u4e00\u4e2a\u65b0\u7684\u4f5c\u7528\u57df\u3002\u5728\u8fd9\u4e2a\u4f5c\u7528\u57df\u4e2d\u58f0\u660e\u7684\u53d8\u91cf\u53ea\u80fd\u5728\u5757\u5185\u8bbf\u95ee\uff0c\u4e0d\u80fd\u88ab\u5916\u90e8\u4ee3\u7801\u8bbf\u95ee\u3002<\/p>\n<p><strong>\u53d8\u91cf\u8bbf\u95ee\u9650\u5236<\/strong><\/p>\n<p>\u51fd\u6570\u5757\u4f5c\u7528\u57df\u9650\u5236\u4e86\u5bf9\u53d8\u91cf\u7684\u8bbf\u95ee\uff0c\u6709\u4ee5\u4e0b\u89c4\u5219\uff1a<\/p>\n<ul>\n<li>\u51fd\u6570\u5757\u5185\u58f0\u660e\u7684\u53d8\u91cf\u53ea\u80fd\u5728\u51fd\u6570\u5757\u5185\u8bbf\u95ee\u3002<\/li>\n<li>\u51fd\u6570\u5757\u5916\u7684\u53d8\u91cf\u53ef\u4ee5\u5728\u51fd\u6570\u5757\u5185\u8bbf\u95ee\uff0c\u524d\u63d0\u662f\u5b83\u4eec\u5728\u5757\u5185\u6ca1\u6709\u88ab\u91cd\u65b0\u58f0\u660e\u3002<\/li>\n<li>\u51fd\u6570\u5757\u5185\u91cd\u65b0\u58f0\u660e\u7684\u53d8\u91cf\u4f1a\u8986\u76d6\u51fd\u6570\u5757\u5916\u7684\u540c\u540d\u53d8\u91cf\uff0c\u5e76\u4e14\u4ec5\u5728\u51fd\u6570\u5757\u5185\u53ef\u7528\u3002<\/li>\n<\/ul>\n<p><strong>\u5b9e\u6218\u6848\u4f8b<\/strong><\/p>\n<p>\u8003\u8651\u4ee5\u4e0b\u793a\u4f8b\u4ee3\u7801\uff1a<\/p>\n<pre>&lt;?php\n\n$global_var = 'Global Variable';\n\nfunction test_scope() {\n    $function_var = 'Function Variable';\n\n    echo $global_var . PHP_EOL; \/\/ \u8f93\u51fa\uff1aGlobal Variable\n    echo $function_var . PHP_EOL; \/\/ \u8f93\u51fa\uff1aFunction Variable\n\n    $global_var = 'Overridden Global Variable'; \/\/ \u91cd\u65b0\u58f0\u660e\u5168\u5c40\u53d8\u91cf\n\n    echo $global_var . PHP_EOL; \/\/ \u8f93\u51fa\uff1aOverridden Global Variable\n    echo $function_var . PHP_EOL; \/\/ \u8f93\u51fa\uff1aFunction Variable\n}\n\ntest_scope();\n\necho $global_var . PHP_EOL; \/\/ \u8f93\u51fa\uff1aOverridden Global Variable<\/pre>\n<p><strong>\u8bf4\u660e\uff1a<\/strong><\/p>\n<ul>\n<li>\u51fd\u6570 <code>test_scope<\/code> \u521b\u5efa\u4e86\u4e00\u4e2a\u51fd\u6570\u5757\u4f5c\u7528\u57df\u3002<\/li>\n<li>\u51fd\u6570\u5757\u5185\u58f0\u660e\u7684\u53d8\u91cf <code>$function_var<\/code> \u53ea\u80fd\u5728\u5757\u5185\u8bbf\u95ee\u3002<\/li>\n<li>\u51fd\u6570\u5757\u5185\u91cd\u65b0\u58f0\u660e\u7684\u5168\u5c40\u53d8\u91cf <code>$global_var<\/code> \u53ea\u5728\u5757\u5185\u6709\u6548\u3002<\/li>\n<li>\u51fd\u6570\u5757\u5916\u4ecd\u7136\u53ef\u4ee5\u4f7f\u7528 <code>$global_var<\/code>\uff0c\u4f46\u88ab\u91cd\u65b0\u58f0\u660e\u540e\u7684\u503c\u6240\u8986\u76d6\u3002<\/li>\n<\/ul>\n<p><strong>\u7ed3\u8bba<\/strong><\/p>\n<p>\u51fd\u6570\u5757\u4f5c\u7528\u57df\u5141\u8bb8\u5bf9\u53d8\u91cf\u7684\u8bbf\u95ee\u8fdb\u884c\u66f4\u7cbe\u786e\u7684\u63a7\u5236\uff0c\u6709\u52a9\u4e8e\u63d0\u9ad8\u4ee3\u7801\u7684\u53ef\u8bfb\u6027\u548c\u53ef\u7ef4\u62a4\u6027\u3002\u901a\u8fc7\u9650\u5236\u8bbf\u95ee\u6743\u9650\uff0c\u53ef\u4ee5\u9632\u6b62\u610f\u5916\u8986\u76d6\u53d8\u91cf\u548c\u63d0\u9ad8\u4ee3\u7801\u5b89\u5168\u6027\u3002<\/p>\n<p>\u4ee5\u4e0a\u5c31\u662f\u672c\u6587\u7684\u5168\u90e8\u5185\u5bb9\u4e86\uff0c\u662f\u5426\u6709\u987a\u5229\u5e2e\u52a9\u4f60\u89e3\u51b3\u95ee\u9898\uff1f\u82e5\u662f\u80fd\u7ed9\u4f60\u5e26\u6765\u5b66\u4e60\u4e0a\u7684\u5e2e\u52a9\uff0c\u8bf7\u5927\u5bb6\u591a\u591a\u652f\u6301\u7c73\u4e91\uff01\u66f4\u591a\u5173\u4e8e\u6587\u7ae0\u7684\u76f8\u5173\u77e5\u8bc6\uff0c\u4e5f\u53ef\u5173\u6ce8\u7c73\u4e91\u516c\u4f17\u53f7\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>PHP\u51fd\u6570\u5757\u4f5c\u7528\u57df\u9650\u5236\u5bf9\u53d8\u91cf\u7684\u8bbf\u95ee\u6709\u4f55\u5f71\u54cd \u672c\u7bc7\u6587\u7ae0\u4e3b\u8981\u662f\u7ed3\u5408\u6211\u4e4b\u524d\u9762\u8bd5\u7684\u5404\u79cd\u7ecf\u5386\u548c\u5b9e\u6218\u5f00\u53d1\u4e2d\u9047\u5230\u7684\u95ee\u9898\u89e3\u51b3\u7ecf\u9a8c\u6574\u7406\u7684\uff0c\u5e0c\u671b\u8fd9\u7bc7\u300aPHP\u51fd\u6570\u5757\u4f5c\u7528\u57df\u9650\u5236\u5bf9\u53d8\u91cf\u7684\u8bbf\u95ee\u6709\u4f55\u5f71\u54cd\u300b\u5bf9\u4f60\u6709\u5f88\u5927\u5e2e\u52a9\uff01\u6b22\u8fce\u6536\u85cf\uff0c\u5206\u4eab\u7ed9\u66f4\u591a\u7684\u9700\u8981\u7684\u670b\u53cb\u5b66\u4e60~ \u51fd\u6570\u5757\u4f5c\u7528\u57df\u9650\u5236\u4e86\u53d8\u91cf\u8bbf\u95ee\u6743\u9650\uff0c\u786e\u4fdd\u51fd\u6570\u5757\u5185\u58f0\u660e\u7684\u53d8\u91cf\u4ec5\u5728\u5757\u5185\u53ef\u7528\uff0c\u800c\u51fd\u6570\u5757\u5916\u7684\u53d8\u91cf\u5728\u5757\u5185\u53ef\u8bbf\u95ee\uff0c\u9664\u975e\u5728\u5757\u5185\u91cd\u65b0\u58f0\u660e\u3002 PHP \u51fd\u6570\u5757\u4f5c\u7528\u57df\u9650\u5236\u5bf9\u53d8\u91cf\u7684\u8bbf\u95ee\u6709\u4f55\u5f71\u54cd \u5f15\u8a00 \u5728 PHP \u4e2d\uff0c\u53d8\u91cf\u7684\u4f5c\u7528\u57df\u5b9a\u4e49\u4e86\u53d8\u91cf\u7684\u53ef\u8bbf\u95ee\u6027\u3002\u51fd\u6570\u5757\u4f5c\u7528\u57df\u662f\u4e00\u79cd\u9650\u5b9a\u53d8\u91cf\u8bbf\u95ee\u6743\u9650\u7684\u65b9\u5f0f\uff0c\u672c\u6587\u5c06\u63a2\u8ba8\u51fd\u6570\u5757\u4f5c\u7528\u57df\u5982\u4f55\u5f71\u54cd\u5bf9\u53d8\u91cf\u7684\u8bbf\u95ee\u3002 \u51fd\u6570\u5757\u4f5c\u7528\u57df \u51fd\u6570\u5757\u662f\u4e00\u5bf9\u5927\u62ec\u53f7\u5305\u88f9\u7684\u4ee3\u7801\u5757\uff0c\u5b83\u521b\u5efa\u4e86\u4e00\u4e2a\u65b0\u7684\u4f5c\u7528\u57df\u3002\u5728\u8fd9\u4e2a\u4f5c\u7528\u57df\u4e2d\u58f0\u660e\u7684\u53d8\u91cf\u53ea\u80fd\u5728\u5757\u5185\u8bbf\u95ee\uff0c\u4e0d\u80fd\u88ab\u5916\u90e8\u4ee3\u7801\u8bbf\u95ee\u3002 \u53d8\u91cf\u8bbf\u95ee\u9650\u5236 \u51fd\u6570\u5757\u4f5c\u7528\u57df\u9650\u5236\u4e86\u5bf9\u53d8\u91cf\u7684\u8bbf\u95ee\uff0c\u6709\u4ee5\u4e0b\u89c4\u5219\uff1a \u51fd\u6570\u5757\u5185\u58f0\u660e\u7684\u53d8\u91cf\u53ea\u80fd\u5728\u51fd\u6570\u5757\u5185\u8bbf\u95ee\u3002 \u51fd\u6570\u5757\u5916\u7684\u53d8\u91cf\u53ef\u4ee5\u5728\u51fd\u6570\u5757\u5185\u8bbf\u95ee\uff0c\u524d\u63d0\u662f\u5b83\u4eec\u5728\u5757\u5185\u6ca1\u6709\u88ab\u91cd\u65b0\u58f0\u660e\u3002 \u51fd\u6570\u5757\u5185\u91cd\u65b0\u58f0\u660e\u7684\u53d8\u91cf\u4f1a\u8986\u76d6\u51fd\u6570\u5757\u5916\u7684\u540c\u540d\u53d8\u91cf\uff0c\u5e76\u4e14\u4ec5\u5728\u51fd\u6570\u5757\u5185\u53ef\u7528\u3002 \u5b9e\u6218\u6848\u4f8b \u8003\u8651\u4ee5\u4e0b\u793a\u4f8b\u4ee3\u7801\uff1a &lt;?php $global_var = &#8216;Global Variable&#8217;; function test_scope() { $function_var = &#8216;Function Variable&#8217;; echo $global_var . PHP_EOL; \/\/ \u8f93\u51fa\uff1aGlobal Variable echo $function_var . PHP_EOL; \/\/ \u8f93\u51fa\uff1aFunction Variable $global_var = &#8216;Overridden Global Variable&#8217;; \/\/ \u91cd\u65b0\u58f0\u660e\u5168\u5c40\u53d8\u91cf echo $global_var . 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