{"id":48464,"date":"2024-12-02T11:08:20","date_gmt":"2024-12-02T03:08:20","guid":{"rendered":"https:\/\/fwq.ai\/blog\/48464\/"},"modified":"2024-12-02T11:08:20","modified_gmt":"2024-12-02T03:08:20","slug":"php%e5%87%bd%e6%95%b0%e5%a6%82%e4%bd%95%e4%bd%bf%e7%94%a8%e7%b1%bb%e5%9e%8b%e6%8f%90%e7%a4%ba%e5%8f%82%e6%95%b0%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/48464\/","title":{"rendered":"PHP\u51fd\u6570\u5982\u4f55\u4f7f\u7528\u7c7b\u578b\u63d0\u793a\u53c2\u6570\uff1f"},"content":{"rendered":"<p><b><\/b> <\/p>\n<h1>PHP\u51fd\u6570\u5982\u4f55\u4f7f\u7528\u7c7b\u578b\u63d0\u793a\u53c2\u6570\uff1f<\/h1>\n<p>\u4ece\u73b0\u5728\u5f00\u59cb\uff0c\u52aa\u529b\u5b66\u4e60\u5427\uff01\u672c\u6587<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\">\u300aPHP\u51fd\u6570\u5982\u4f55\u4f7f\u7528\u7c7b\u578b\u63d0\u793a\u53c2\u6570\uff1f\u300b<\/span>\u4e3b\u8981\u8bb2\u89e3\u4e86<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\"><\/span>\u7b49\u7b49\u76f8\u5173\u77e5\u8bc6\u70b9\uff0c\u6211\u4f1a\u5728\u7c73\u4e91\u4e2d\u6301\u7eed\u66f4\u65b0\u76f8\u5173\u7684\u7cfb\u5217\u6587\u7ae0\uff0c\u6b22\u8fce\u5927\u5bb6\u5173\u6ce8\u5e76\u79ef\u6781\u7559\u8a00\u5efa\u8bae\u3002\u4e0b\u9762\u5c31\u5148\u4e00\u8d77\u6765\u770b\u4e00\u4e0b\u672c\u7bc7\u6b63\u6587\u5185\u5bb9\u5427\uff0c\u5e0c\u671b\u80fd\u5e2e\u5230\u4f60\uff01<\/p>\n<p>\u662f\u7684\uff0cPHP \u51fd\u6570\u53ef\u4ee5\u4f7f\u7528\u7c7b\u578b\u63d0\u793a\u53c2\u6570\u3002\u5177\u4f53\u800c\u8a00\uff1a\u7c7b\u578b\u63d0\u793a\u5141\u8bb8\u60a8\u5728\u51fd\u6570\u7b7e\u540d\u4e2d\u6307\u5b9a\u53c2\u6570\u7684\u9884\u671f\u7c7b\u578b\u3002\u8bed\u6cd5\u4e3a\uff1afunction function_name(type $parameter_name): type\u3002\u597d\u5904\u5305\u62ec\uff1a\u63d0\u9ad8\u53ef\u8bfb\u6027\u3001\u589e\u5f3a\u5b89\u5168\u6027\uff0c\u6539\u8fdb IDE \u652f\u6301\u3002\u8054\u5408\u7c7b\u578b\u3001\u53ef\u4e3a\u7a7a\u7c7b\u578b\u548c\u6cdb\u578b\u662f\u652f\u6301\u7684\u5176\u4ed6\u7c7b\u578b\u63d0\u793a\u7279\u6027\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20241027\/1730033019671e357be8760.jpg\" class=\"aligncenter\" title=\"PHP\u51fd\u6570\u5982\u4f55\u4f7f\u7528\u7c7b\u578b\u63d0\u793a\u53c2\u6570\uff1f\u63d2\u56fe\" alt=\"PHP\u51fd\u6570\u5982\u4f55\u4f7f\u7528\u7c7b\u578b\u63d0\u793a\u53c2\u6570\uff1f\u63d2\u56fe\" \/><\/p>\n<p><strong>PHP \u51fd\u6570\u5982\u4f55\u4f7f\u7528\u7c7b\u578b\u63d0\u793a\u53c2\u6570<\/strong><\/p>\n<p>PHP \u4e2d\u7684\u7c7b\u578b\u63d0\u793a\u5141\u8bb8\u60a8\u5728\u51fd\u6570\u7b7e\u540d\u4e2d\u6307\u5b9a\u53c2\u6570\u7684\u9884\u671f\u7c7b\u578b\u3002\u8fd9\u6709\u52a9\u4e8e\u63d0\u9ad8\u4ee3\u7801\u53ef\u8bfb\u6027\u3001\u53ef\u7ef4\u62a4\u6027\u548c\u5b89\u5168\u6027\u3002<\/p>\n<p><strong>\u8bed\u6cd5<\/strong><\/p>\n<p>\u51fd\u6570\u7c7b\u578b\u63d0\u793a\u7684\u57fa\u672c\u8bed\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre>function function_name(type $parameter_name): type {\n    \/\/ \u51fd\u6570\u4f53\n}<\/pre>\n<ul>\n<li><strong>type<\/strong> \u662f\u5141\u8bb8\u7684\u53c2\u6570\u7c7b\u578b\uff0c\u5982 <code>int<\/code>\u3001<code>string<\/code>\u3001<code>bool<\/code>\u3001<code>array<\/code>\u3001<code>object<\/code>\u3001<code>iterable<\/code> \u7b49\u3002<\/li>\n<li><strong>$parameter_name<\/strong> \u662f\u51fd\u6570\u53c2\u6570\u7684\u540d\u79f0\u3002<\/li>\n<\/ul>\n<p><strong>\u5b9e\u6218\u6848\u4f8b<\/strong><\/p>\n<p>\u8003\u8651\u4ee5\u4e0b\u51fd\u6570\uff0c\u7528\u4e8e\u8ba1\u7b97\u4e24\u4e2a\u6570\u5b57\u7684\u603b\u548c\uff1a<\/p>\n<pre>function sum(int $num1, int $num2) {\n    return $num1 + $num2;\n}<\/pre>\n<p>\u8be5\u51fd\u6570\u4f7f\u7528\u7c7b\u578b\u63d0\u793a\u6765\u6307\u5b9a <code>$num1<\/code> \u548c <code>$num2<\/code> \u53c2\u6570\u5e94\u4e3a\u6574\u6570\u3002\u5982\u679c\u5c06\u975e\u6574\u6570\u503c\u4f20\u9012\u7ed9\u8fd9\u4e9b\u53c2\u6570\uff0cPHP \u5c06\u5f15\u53d1 <code>TypeError<\/code> \u5f02\u5e38\u3002<\/p>\n<p><strong>\u597d\u5904<\/strong><\/p>\n<p>\u7c7b\u578b\u63d0\u793a\u5177\u6709\u4ee5\u4e0b\u597d\u5904\uff1a<\/p>\n<ul>\n<li><strong>\u63d0\u9ad8\u4ee3\u7801\u53ef\u8bfb\u6027\uff1a<\/strong>\u6e05\u695a\u5730\u8868\u660e\u51fd\u6570\u53c2\u6570\u7684\u9884\u671f\u7c7b\u578b\u3002<\/li>\n<li><strong>\u589e\u5f3a\u5b89\u5168\u6027\uff1a<\/strong>\u901a\u8fc7\u9632\u6b62\u4f20\u9012\u4e0d\u5339\u914d\u7c7b\u578b\u7684\u503c\u6765\u5e2e\u52a9\u9632\u6b62\u9519\u8bef\u548c\u5b89\u5168\u6f0f\u6d1e\u3002<\/li>\n<li><strong>\u6539\u8fdb IDE \u652f\u6301\uff1a<\/strong>IDE\uff08\u96c6\u6210\u5f00\u53d1\u73af\u5883\uff09\u53ef\u4ee5\u5229\u7528\u7c7b\u578b\u63d0\u793a\u6765\u63d0\u4f9b\u4ee3\u7801\u5b8c\u6210\u548c\u53c2\u6570\u9a8c\u8bc1\u7b49\u529f\u80fd\u3002<\/li>\n<\/ul>\n<p><strong>\u5176\u4ed6\u7c7b\u578b\u63d0\u793a\u7279\u6027<\/strong><\/p>\n<ul>\n<li><strong>\u8054\u5408\u7c7b\u578b\uff1a<\/strong>\u60a8\u53ef\u4ee5\u4f7f\u7528\u7ba1\u9053 (|) \u6307\u5b9a\u53c2\u6570\u53ef\u4ee5\u63a5\u53d7\u591a\u4e2a\u7c7b\u578b\uff0c\u4f8b\u5982 <code>function_name(int|string $parameter_name)<\/code>\u3002<\/li>\n<li><strong>\u53ef\u4e3a\u7a7a\uff1a<\/strong>\u4f7f\u7528 <code>?<\/code> \u7b26\u53f7\u6307\u5b9a\u53c2\u6570\u53ef\u4ee5\u4e3a\u7a7a\uff0c\u4f8b\u5982 <code>function_name(?string $parameter_name)<\/code>\u3002<\/li>\n<li><strong>\u6cdb\u578b\uff1a<\/strong>PHP 8.0 \u53ca\u66f4\u9ad8\u7248\u672c\u652f\u6301\u4f7f\u7528 <code>T<\/code> \u6307\u5b9a\u6cdb\u578b\u7c7b\u578b\uff0c\u4f8b\u5982 <code>function_name(T $parameter_name)<\/code>\u3002<\/li>\n<\/ul>\n<p><strong>\u7ed3\u8bba<\/strong><\/p>\n<p>\u7c7b\u578b\u63d0\u793a\u662f\u63d0\u9ad8 PHP \u4ee3\u7801\u8d28\u91cf\u7684\u5b9d\u8d35\u5de5\u5177\u3002\u901a\u8fc7\u4f7f\u7528\u5b83\uff0c\u60a8\u53ef\u4ee5\u786e\u4fdd\u51fd\u6570\u53c2\u6570\u7684\u9884\u671f\u7c7b\u578b\uff0c\u4ece\u800c\u63d0\u9ad8\u4ee3\u7801\u53ef\u9760\u6027\u3001\u5b89\u5168\u6027\u5e76\u51cf\u5c11\u9519\u8bef\u3002<\/p>\n<p>\u672c\u7bc7\u5173\u4e8e\u300aPHP\u51fd\u6570\u5982\u4f55\u4f7f\u7528\u7c7b\u578b\u63d0\u793a\u53c2\u6570\uff1f\u300b\u7684\u4ecb\u7ecd\u5c31\u5230\u6b64\u7ed3\u675f\u5566\uff0c\u4f46\u662f\u5b66\u65e0\u6b62\u5883\uff0c\u60f3\u8981\u4e86\u89e3\u5b66\u4e60\u66f4\u591a\u5173\u4e8e\u6587\u7ae0\u7684\u76f8\u5173\u77e5\u8bc6\uff0c\u8bf7\u5173\u6ce8\u7c73\u4e91\u516c\u4f17\u53f7\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>PHP\u51fd\u6570\u5982\u4f55\u4f7f\u7528\u7c7b\u578b\u63d0\u793a\u53c2\u6570\uff1f \u4ece\u73b0\u5728\u5f00\u59cb\uff0c\u52aa\u529b\u5b66\u4e60\u5427\uff01\u672c\u6587\u300aPHP\u51fd\u6570\u5982\u4f55\u4f7f\u7528\u7c7b\u578b\u63d0\u793a\u53c2\u6570\uff1f\u300b\u4e3b\u8981\u8bb2\u89e3\u4e86\u7b49\u7b49\u76f8\u5173\u77e5\u8bc6\u70b9\uff0c\u6211\u4f1a\u5728\u7c73\u4e91\u4e2d\u6301\u7eed\u66f4\u65b0\u76f8\u5173\u7684\u7cfb\u5217\u6587\u7ae0\uff0c\u6b22\u8fce\u5927\u5bb6\u5173\u6ce8\u5e76\u79ef\u6781\u7559\u8a00\u5efa\u8bae\u3002\u4e0b\u9762\u5c31\u5148\u4e00\u8d77\u6765\u770b\u4e00\u4e0b\u672c\u7bc7\u6b63\u6587\u5185\u5bb9\u5427\uff0c\u5e0c\u671b\u80fd\u5e2e\u5230\u4f60\uff01 \u662f\u7684\uff0cPHP \u51fd\u6570\u53ef\u4ee5\u4f7f\u7528\u7c7b\u578b\u63d0\u793a\u53c2\u6570\u3002\u5177\u4f53\u800c\u8a00\uff1a\u7c7b\u578b\u63d0\u793a\u5141\u8bb8\u60a8\u5728\u51fd\u6570\u7b7e\u540d\u4e2d\u6307\u5b9a\u53c2\u6570\u7684\u9884\u671f\u7c7b\u578b\u3002\u8bed\u6cd5\u4e3a\uff1afunction function_name(type $parameter_name): type\u3002\u597d\u5904\u5305\u62ec\uff1a\u63d0\u9ad8\u53ef\u8bfb\u6027\u3001\u589e\u5f3a\u5b89\u5168\u6027\uff0c\u6539\u8fdb IDE \u652f\u6301\u3002\u8054\u5408\u7c7b\u578b\u3001\u53ef\u4e3a\u7a7a\u7c7b\u578b\u548c\u6cdb\u578b\u662f\u652f\u6301\u7684\u5176\u4ed6\u7c7b\u578b\u63d0\u793a\u7279\u6027\u3002 PHP \u51fd\u6570\u5982\u4f55\u4f7f\u7528\u7c7b\u578b\u63d0\u793a\u53c2\u6570 PHP \u4e2d\u7684\u7c7b\u578b\u63d0\u793a\u5141\u8bb8\u60a8\u5728\u51fd\u6570\u7b7e\u540d\u4e2d\u6307\u5b9a\u53c2\u6570\u7684\u9884\u671f\u7c7b\u578b\u3002\u8fd9\u6709\u52a9\u4e8e\u63d0\u9ad8\u4ee3\u7801\u53ef\u8bfb\u6027\u3001\u53ef\u7ef4\u62a4\u6027\u548c\u5b89\u5168\u6027\u3002 \u8bed\u6cd5 \u51fd\u6570\u7c7b\u578b\u63d0\u793a\u7684\u57fa\u672c\u8bed\u6cd5\u5982\u4e0b\uff1a function function_name(type $parameter_name): type { \/\/ \u51fd\u6570\u4f53 } type \u662f\u5141\u8bb8\u7684\u53c2\u6570\u7c7b\u578b\uff0c\u5982 int\u3001string\u3001bool\u3001array\u3001object\u3001iterable \u7b49\u3002 $parameter_name \u662f\u51fd\u6570\u53c2\u6570\u7684\u540d\u79f0\u3002 \u5b9e\u6218\u6848\u4f8b \u8003\u8651\u4ee5\u4e0b\u51fd\u6570\uff0c\u7528\u4e8e\u8ba1\u7b97\u4e24\u4e2a\u6570\u5b57\u7684\u603b\u548c\uff1a function sum(int $num1, int $num2) { return $num1 + $num2; } \u8be5\u51fd\u6570\u4f7f\u7528\u7c7b\u578b\u63d0\u793a\u6765\u6307\u5b9a $num1 \u548c $num2 \u53c2\u6570\u5e94\u4e3a\u6574\u6570\u3002\u5982\u679c\u5c06\u975e\u6574\u6570\u503c\u4f20\u9012\u7ed9\u8fd9\u4e9b\u53c2\u6570\uff0cPHP \u5c06\u5f15\u53d1 TypeError \u5f02\u5e38\u3002 \u597d\u5904 \u7c7b\u578b\u63d0\u793a\u5177\u6709\u4ee5\u4e0b\u597d\u5904\uff1a \u63d0\u9ad8\u4ee3\u7801\u53ef\u8bfb\u6027\uff1a\u6e05\u695a\u5730\u8868\u660e\u51fd\u6570\u53c2\u6570\u7684\u9884\u671f\u7c7b\u578b\u3002 \u589e\u5f3a\u5b89\u5168\u6027\uff1a\u901a\u8fc7\u9632\u6b62\u4f20\u9012\u4e0d\u5339\u914d\u7c7b\u578b\u7684\u503c\u6765\u5e2e\u52a9\u9632\u6b62\u9519\u8bef\u548c\u5b89\u5168\u6f0f\u6d1e\u3002 \u6539\u8fdb [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[16],"tags":[],"class_list":["post-48464","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/48464","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/comments?post=48464"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/48464\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=48464"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=48464"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=48464"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}