{"id":183801,"date":"2024-05-08T21:53:37","date_gmt":"2024-05-08T13:53:37","guid":{"rendered":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/183801.html"},"modified":"2024-05-08T21:53:45","modified_gmt":"2024-05-08T13:53:45","slug":"php-%e7%b1%bb%e7%9a%84%e6%96%b9%e6%b3%95%e7%9a%84%e5%8f%82%e6%95%b0%e6%98%af%e7%b1%bb%e5%90%8d%e6%80%8e%e4%b9%88%e7%90%86%e8%a7%a3","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/183801.html","title":{"rendered":"php \u7c7b\u7684\u65b9\u6cd5\u7684\u53c2\u6570\u662f\u7c7b\u540d\u600e\u4e48\u7406\u89e3"},"content":{"rendered":"<p style=\"text-align:center\"><img decoding=\"async\" src=\"https:\/\/cdn-kb.worktile.com\/kb\/wp-content\/uploads\/2024\/04\/27074608\/c3782512-2025-4fe1-858d-4e0a320a049e.webp\" alt=\"php \u7c7b\u7684\u65b9\u6cd5\u7684\u53c2\u6570\u662f\u7c7b\u540d\u600e\u4e48\u7406\u89e3\" \/><\/p>\n<p><p>PHP\u4e2d\u7684\u7c7b\u65b9\u6cd5\u53c2\u6570\u53ef\u4ee5\u6307\u5b9a\u4e3a\u5176\u4ed6\u7c7b\u7684\u540d\u79f0\uff0c\u8fd9\u662f\u4e00\u79cd\u7c7b\u578b\u63d0\u793a\u7279\u6027\uff0c\u8868\u660e\u65b9\u6cd5\u671f\u671b\u5176\u53c2\u6570\u662f\u67d0\u4e2a\u7279\u5b9a\u7c7b\u7684\u5b9e\u4f8b\u3002<strong>\u7c7b\u578b\u63d0\u793a<\/strong>\u3001<strong>\u4f9d\u8d56\u6ce8\u5165<\/strong>\u3001<strong>\u9762\u5411\u5bf9\u8c61\u7f16\u7a0b<\/strong>\u4e2d\u7684\u4e00\u4e2a\u5173\u952e\u6982\u5ff5\u3002<\/p>\n<\/p>\n<p><p>\u4f8b\u5982\uff0c\u5982\u679c\u6709\u4e00\u4e2a\u540d\u4e3a <code>Em<a href=\"https:\/\/docs.pingcode.com\/blog\/59162.html\" target=\"_blank\">AI<\/a>l<\/code> \u7684\u7c7b\uff0c\u5e76\u4e14\u6709\u53e6\u4e00\u4e2a\u7c7b\u7684\u65b9\u6cd5 <code>sendEmail<\/code> \u5e0c\u671b\u63a5\u6536\u4e00\u4e2a <code>Email<\/code> \u7c7b\u578b\u7684\u53c2\u6570\uff0c\u90a3\u4e48\u4f60\u53ef\u4ee5\u5728 <code>sendEmail<\/code> \u65b9\u6cd5\u7684\u5b9a\u4e49\u4e2d\u5c06\u53c2\u6570\u7c7b\u578b\u6307\u5b9a\u4e3a <code>Email<\/code>\u3002\u5f53\u8fd9\u4e2a\u65b9\u6cd5\u88ab\u8c03\u7528\u65f6\uff0c\u5b83\u53ea\u63a5\u53d7 <code>Email<\/code> \u7c7b\u7684\u5b9e\u4f8b\uff0c\u5426\u5219\u4f1a\u629b\u51fa\u4e00\u4e2a\u7c7b\u578b\u9519\u8bef\u5f02\u5e38\u3002\u8fd9\u79cd\u505a\u6cd5\u63d0\u9ad8\u4e86\u4ee3\u7801\u7684\u5065\u58ee\u6027\uff0c\u4fdd\u8bc1\u4e86\u65b9\u6cd5\u6309\u7167\u5f00\u53d1\u8005\u7684\u9884\u671f\u4f7f\u7528\u9002\u5f53\u7c7b\u578b\u7684\u5bf9\u8c61\u3002<\/p>\n<\/p>\n<p><p>\u63a5\u4e0b\u6765\uff0c\u6211\u4eec\u5c06\u8be6\u7ec6\u63a2\u8ba8\u8fd9\u4e00\u7279\u6027\u7684\u7528\u6cd5\u548c\u597d\u5904\u3002<\/p>\n<\/p>\n<p><h3>\u4e00\u3001\u7c7b\u578b\u63d0\u793a\u548c\u7c7b\u7c7b\u578b\u58f0\u660e<\/h3>\n<\/p>\n<p><p><strong>\u7c7b\u578b\u63d0\u793a<\/strong>\u662f\u5728\u51fd\u6570\u6216\u65b9\u6cd5\u7684\u53c2\u6570\u524d\u6307\u5b9a\u53c2\u6570\u7684\u7c7b\u578b\uff0c\u76ee\u7684\u662f\u786e\u4fdd\u8c03\u7528\u51fd\u6570\u6216\u65b9\u6cd5\u65f6\u63d0\u4f9b\u7684\u53c2\u6570\u5177\u6709\u6b63\u786e\u7684\u7c7b\u578b\u3002\u8fd9\u6837\u505a\u53ef\u4ee5\u51cf\u5c11\u8fd0\u884c\u65f6\u9519\u8bef\uff0c\u5e76\u4f7f\u4ee3\u7801\u66f4\u52a0\u6e05\u6670\u3002\u5728PHP\u4e2d\uff0c\u9664\u4e86\u53ef\u4ee5\u6307\u5b9a\u57fa\u672c\u6570\u636e\u7c7b\u578b\u505a\u4e3a\u53c2\u6570\u7c7b\u578b\u5916\uff0c\u8fd8\u5141\u8bb8\u6307\u5b9a\u7c7b\u540d\u4f5c\u4e3a\u53c2\u6570\u7c7b\u578b\u3002<\/p>\n<\/p>\n<p><p>\u4f8b\u5982\uff0c\u5b9a\u4e49\u4e00\u4e2a\u63a5\u6536 <code>User<\/code> \u7c7b\u578b\u53c2\u6570\u7684\u65b9\u6cd5\uff1a<\/p>\n<\/p>\n<p><pre><code class=\"language-php\">class User {<\/p>\n<p>    \/\/ User\u7c7b\u7684\u5b9a\u4e49<\/p>\n<p>}<\/p>\n<p>class UserProcessor {<\/p>\n<p>    public function process(User $user) {<\/p>\n<p>        \/\/ \u65b9\u6cd5\u4f53\u4e2d\u5904\u7406$user\u5bf9\u8c61<\/p>\n<p>    }<\/p>\n<p>}<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p><strong>\u7c7b\u7c7b\u578b\u58f0\u660e<\/strong>\u786e\u4fdd\u4f20\u9012\u7ed9 <code>process<\/code> \u65b9\u6cd5\u7684\u53c2\u6570\u4e00\u5b9a\u662f <code>User<\/code> \u7c7b\u7684\u4e00\u4e2a\u5b9e\u4f8b\uff0c\u5426\u5219\u5c06\u4ea7\u751f\u9519\u8bef\u3002\u8fd9\u79cd\u65b9\u5f0f\u5728\u5904\u7406\u9700\u8981\u660e\u786e\u7279\u5b9a\u7c7b\u5b9e\u4f8b\u7684\u65b9\u6cd5\u65f6\u975e\u5e38\u6709\u7528\u3002<\/p>\n<\/p>\n<p><h3>\u4e8c\u3001\u4f9d\u8d56\u6ce8\u5165<\/h3>\n<\/p>\n<p><p>\u5229\u7528\u7c7b\u7c7b\u578b\u7684\u53c2\u6570\u53ef\u4ee5\u5b9e\u73b0 <strong>\u4f9d\u8d56\u6ce8\u5165<\/strong>\uff08Dependency Injection\uff09\uff0c\u8fd9\u662f\u4e00\u79cd\u8f6f\u4ef6\u8bbe\u8ba1\u6a21\u5f0f\uff0c\u7528\u4e8e\u51cf\u5c11\u7c7b\u4e4b\u95f4\u7684\u8026\u5408\u3002\u901a\u8fc7\u7c7b\u7c7b\u578b\u7684\u53c2\u6570\uff0c\u5bf9\u8c61\u53ef\u4ee5\u5728\u8fd0\u884c\u65f6\u63a5\u6536\u5176\u5b83\u5bf9\u8c61\u7684\u5b9e\u4f8b\u3002<\/p>\n<\/p>\n<p><pre><code class=\"language-php\">class EmailService {<\/p>\n<p>    \/\/ \u90ae\u4ef6\u670d\u52a1\u7c7b\u7684\u5b9e\u73b0<\/p>\n<p>}<\/p>\n<p>class UserController {<\/p>\n<p>    protected $emailService;<\/p>\n<p>    public function __construct(EmailService $emailService) {<\/p>\n<p>        $this-&gt;emailService = $emailService;<\/p>\n<p>    }<\/p>\n<p>    public function sendUserEmail(User $user) {<\/p>\n<p>        \/\/ \u4f7f\u7528$this-&gt;emailService\u53d1\u9001\u90ae\u4ef6\u7ed9$user<\/p>\n<p>    }<\/p>\n<p>}<\/p>\n<p>\/\/ \u4f7f\u7528\u4f9d\u8d56\u6ce8\u5165<\/p>\n<p>$emailService = new EmailService();<\/p>\n<p>$userController = new UserController($emailService);<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p>\u5728\u4e0a\u8ff0\u4ee3\u7801\u4e2d\uff0c<code>UserController<\/code> \u6784\u9020\u51fd\u6570\u4f7f\u7528 <code>EmailService<\/code> \u7c7b\u578b\u7684\u53c2\u6570\uff0c\u8fd9\u610f\u5473\u7740\u5fc5\u987b\u4f20\u9012 <code>EmailService<\/code> \u7c7b\u7684\u5b9e\u4f8b\u3002\u8fd9\u4f7f\u5f97 <code>EmailService<\/code> \u7684\u5b9e\u4f8b\u53ef\u4ee5\u5728 <code>UserController<\/code> \u7c7b\u4e2d\u88ab\u5229\u7528\uff0c\u964d\u4f4e\u4e86\u4e24\u4e2a\u7c7b\u4e4b\u95f4\u7684\u8026\u5408\u5ea6\u3002<\/p>\n<\/p>\n<p><h3>\u4e09\u3001\u589e\u5f3a\u7684\u4ee3\u7801\u53ef\u8bfb\u6027\u548c\u5065\u58ee\u6027<\/h3>\n<\/p>\n<p><p>\u4f7f\u7528\u7c7b\u540d\u4f5c\u4e3a\u53c2\u6570\u7c7b\u578b\u4e0d\u4ec5\u53ef\u4ee5\u589e\u5f3a\u4ee3\u7801\u7684\u53ef\u8bfb\u6027\uff0c\u540c\u65f6\u4e5f\u63d0\u9ad8\u4e86\u4ee3\u7801\u7684\u5065\u58ee\u6027\u3002\u5f00\u53d1\u8005\u53ef\u4ee5\u6e05\u695a\u5730\u4e86\u89e3\u6bcf\u4e2a\u65b9\u6cd5\u6240\u671f\u671b\u7684\u5177\u4f53\u7c7b\u578b\uff0cIDE\u4e5f\u53ef\u4ee5\u63d0\u4f9b\u66f4\u7cbe\u51c6\u7684\u4ee3\u7801\u63d0\u793a\u548c\u81ea\u52a8\u5b8c\u6210\u529f\u80fd\u3002<\/p>\n<\/p>\n<p><p>\u5f53\u65b9\u6cd5\u88ab\u8c03\u7528\u65f6\uff0c\u5982\u679c\u4f20\u9012\u4e86\u9519\u8bef\u7c7b\u578b\u7684\u53c2\u6570\uff0cPHP\u5c06\u629b\u51fa\u4e00\u4e2a <code>TypeError<\/code> \u5f02\u5e38\uff0c\u8fd9\u4e2a\u673a\u5236\u53ef\u4ee5\u5c3d\u65e9\u7684\u53d1\u73b0\u9519\u8bef\uff0c\u907f\u514d\u6f5c\u5728\u7684\u95ee\u9898\u5728\u8f6f\u4ef6\u7684\u540e\u671f\u624d\u66b4\u9732\u51fa\u6765\u3002<\/p>\n<\/p>\n<p><pre><code class=\"language-php\">class Payment {<\/p>\n<p>    \/\/ \u652f\u4ed8\u7c7b\u7684\u5b9e\u73b0<\/p>\n<p>}<\/p>\n<p>class PaymentProcessor {<\/p>\n<p>    public function process(Payment $payment) {<\/p>\n<p>        \/\/ \u5904\u7406\u652f\u4ed8<\/p>\n<p>    }<\/p>\n<p>}<\/p>\n<p>$paymentProcessor = new PaymentProcessor();<\/p>\n<p>$paymentProcessor-&gt;process(new User()); \/\/ \u5c06\u4f1a\u629b\u51faTypeError\uff0c\u56e0\u4e3a\u671f\u671b\u7684\u662fPayment\u7c7b\u578b\u800c\u4e0d\u662fUser<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><h3>\u56db\u3001\u603b\u7ed3<\/h3>\n<\/p>\n<p><p>\u4e86\u89e3PHP\u4e2d\u7c7b\u7c7b\u578b\u53c2\u6570\u7684\u4f7f\u7528\uff0c\u5bf9\u4e8e\u7f16\u5199\u9ad8\u8d28\u91cf\u548c\u53ef\u7ef4\u62a4\u6027\u5f3a\u7684\u9762\u5411\u5bf9\u8c61\u4ee3\u7801\u81f3\u5173\u91cd\u8981\u3002<strong>\u7c7b\u578b\u63d0\u793a<\/strong>\u4e0d\u4ec5\u53ef\u4ee5\u786e\u4fdd\u65b9\u6cd5\u8c03\u7528\u65f6\u4f20\u9012\u6b63\u786e\u7c7b\u578b\u7684\u53c2\u6570\uff0c\u4e5f\u662f\u5b9e\u73b0<strong>\u4f9d\u8d56\u6ce8\u5165<\/strong>\u7684\u5173\u952e\u4e00\u73af\uff0c\u540c\u65f6\u589e\u5f3a\u4ee3\u7801\u7684\u53ef\u8bfb\u6027\u548c\u5065\u58ee\u6027\u3002\u901a\u8fc7\u8fd9\u79cd\u65b9\u5f0f\uff0c\u5f00\u53d1\u8005\u53ef\u4ee5\u6784\u5efa\u51fa\u7ed3\u6784\u66f4\u52a0\u6e05\u6670\u3001\u66f4\u80fd\u5e94\u5bf9\u590d\u6742\u573a\u666f\u7684\u8f6f\u4ef6\u7cfb\u7edf\u3002<\/p>\n<\/p>\n<h2><strong>\u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n<p><strong>Q: \u5728PHP\u4e2d\uff0c\u7c7b\u7684\u65b9\u6cd5\u7684\u53c2\u6570\u662f\u7c7b\u540d\u8fd9\u662f\u4ec0\u4e48\u610f\u601d\uff1f<\/strong><\/p>\n<p>A: \u5f53\u7c7b\u7684\u65b9\u6cd5\u7684\u53c2\u6570\u662f\u7c7b\u540d\u65f6\uff0c\u610f\u5473\u7740\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528\u8be5\u53c2\u6570\u6765\u5b9e\u4f8b\u5316\u4e00\u4e2a\u5bf9\u8c61\uff0c\u5e76\u5728\u65b9\u6cd5\u4e2d\u901a\u8fc7\u8be5\u5bf9\u8c61\u6765\u8bbf\u95ee\u7c7b\u7684\u5c5e\u6027\u548c\u65b9\u6cd5\u3002\u8fd9\u79cd\u65b9\u5f0f\u5728\u9762\u5411\u5bf9\u8c61\u7f16\u7a0b\u4e2d\u5e38\u7528\u4e8e\u7c7b\u4e4b\u95f4\u7684\u4ea4\u4e92\u548c\u6570\u636e\u5171\u4eab\u3002<\/p>\n<p><strong>Q: \u4e3a\u4ec0\u4e48\u7c7b\u7684\u65b9\u6cd5\u7684\u53c2\u6570\u53ef\u4ee5\u662f\u7c7b\u540d\uff1f\u8fd9\u6709\u4ec0\u4e48\u597d\u5904\uff1f<\/strong><\/p>\n<p>A: 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