{"id":30580,"date":"2023-03-30T23:44:03","date_gmt":"2023-06-15T18:06:44","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e3%80%90php%e3%80%91%e5%85%b3%e4%ba%8e%e7%bb%a7%e6%89%bf%e5%92%8c%e8%a6%86%e7%9b%96\/"},"modified":"2025-08-12T19:51:34","modified_gmt":"2025-08-12T11:51:34","slug":"%e3%80%90php%e3%80%91%e5%85%b3%e4%ba%8e%e7%bb%a7%e6%89%bf%e5%92%8c%e8%a6%86%e7%9b%96","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e3%80%90php%e3%80%91%e5%85%b3%e4%ba%8e%e7%bb%a7%e6%89%bf%e5%92%8c%e8%a6%86%e7%9b%96\/","title":{"rendered":"\u3010PHP\u3011\u5173\u4e8e\u7ee7\u627f\u548c\u8986\u76d6"},"content":{"rendered":"<p>\u6211\u5c1d\u8bd5\u56de\u5230\u57fa\u7840\u7684\u57fa\u7840\u4e0a\u3002<\/p>\n<h2>\u7ee7\u627f\u662f\u6307\u4f20\u627f\u3002<\/h2>\n<p>\u6839\u636e\u5df2\u7ecf\u5b58\u5728\u7684\u7c7b\u521b\u5efa\u65b0\u7684\u7c7b\uff0c\u88ab\u79f0\u4e3a\u7236\u7c7b\u6216\u57fa\u7c7b\u3002<br \/>\n\u65b0\u7684\u7c7b\u88ab\u79f0\u4e3a\u5b50\u7c7b\u3002<\/p>\n<h3>\u7ee7\u627f\u7684\u597d\u5904<\/h3>\n<p>\u5728\u5b50\u7c7b\u4e2d\u4e5f\u53ef\u4ee5\u50cf\u7236\u7c7b\u5b9a\u4e49\u7684\u51fd\u6570\u4e00\u6837\u4f7f\u7528\uff0c\u8fd9\u6837\u5c31\u4e0d\u9700\u8981\u591a\u6b21\u7f16\u5199\u76f8\u4f3c\u7684\u4ee3\u7801\uff0c\u8fd9\u4e0d\u4ec5\u63d0\u9ad8\u4e86\u4ee3\u7801\u7684\u53ef\u91cd\u7528\u6027\uff0c\u8fd8\u63d0\u9ad8\u4e86\u4ee3\u7801\u7684\u53ef\u8bfb\u6027\uff0c\u4f7f\u5f97\u7ef4\u62a4\u66f4\u52a0\u5bb9\u6613\u3002<\/p>\n<h3>\u7ee7\u627f\u7684\u4f7f\u7528\u65b9\u6cd5 &#8211; de<\/h3>\n<p>\u53ef\u4ee5\u901a\u8fc7\u4f7f\u7528 &#8220;class \u5b50\u7c7b\u540d extends \u7236\u7c7b\u540d {}&#8221; \u7684\u5f62\u5f0f\u8fdb\u884c\u7ee7\u627f\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"cp\">&lt;?php<\/span>\r\n<span class=\"c1\">\/\/ \u89aa\u30af\u30e9\u30b9<\/span>\r\n<span class=\"kd\">class<\/span> <span class=\"nc\">ParentClass<\/span> <span class=\"p\">{<\/span>\r\n  <span class=\"k\">public<\/span> <span class=\"k\">function<\/span> <span class=\"n\">test<\/span><span class=\"p\">(){<\/span>\r\n    <span class=\"k\">print<\/span> <span class=\"s1\">'\u89aa\u30af\u30e9\u30b9\u306e\u30e1\u30bd\u30c3\u30c9\u3067\u3059'<\/span><span class=\"mf\">.<\/span><span class=\"s2\">\"<\/span><span class=\"se\">\\n<\/span><span class=\"s2\">\"<\/span><span class=\"p\">;<\/span>\r\n  <span class=\"p\">}<\/span>\r\n<span class=\"p\">}<\/span>\r\n\r\n<span class=\"c1\">\/\/ \u5b50\u30af\u30e9\u30b9 <\/span>\r\n<span class=\"kd\">class<\/span> <span class=\"nc\">ChildClass<\/span> <span class=\"kd\">extends<\/span> <span class=\"nc\">ParentClass<\/span> <span class=\"p\">{<\/span>\r\n\r\n<span class=\"p\">}<\/span>\r\n\r\n<span class=\"nv\">$a<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">ChildClass<\/span><span class=\"p\">();<\/span>\r\n<span class=\"k\">echo<\/span> <span class=\"nv\">$a<\/span><span class=\"o\">-&gt;<\/span><span class=\"nf\">test<\/span><span class=\"p\">();<\/span>\r\n\r\n<span class=\"c1\">\/\/\u51fa\u529b\u7d50\u679c\/\/\/\/\/\/\/<\/span>\r\n<span class=\"n\">\u89aa\u30af\u30e9\u30b9\u306e\u30e1\u30bd\u30c3\u30c9\u3067\u3059<\/span>\r\n<span class=\"cp\">?&gt;<\/span>\r\n<\/code><\/pre>\n<h2>\u8986\u76d6\u91cd\u5199\u6240\u6307\u7684\u662f<\/h2>\n<p>\u901a\u8fc7\u7ee7\u627f\u6765\u8986\u76d6\u7236\u7c7b\u7684\u51fd\u6570\u662f\u524d\u63d0\u6761\u4ef6\u3002\u53ea\u9700\u5728\u5b50\u7c7b\u4e2d\u5b9a\u4e49\u4e00\u4e2a\u4e0e\u7236\u7c7b\u540c\u540d\u7684\u51fd\u6570\uff0c\u5e76\u4e14\u53c2\u6570\u4e5f\u8981\u5339\u914d\uff0c\u5c31\u53ef\u4ee5\u5b9e\u73b0\u51fd\u6570\u7684\u8986\u76d6\u3002(\u203b\u8bf7\u6ce8\u610f\u53c2\u6570\u7684\u5339\u914d)<\/p>\n<h3>\u8986\u76d6\u7684\u597d\u5904<\/h3>\n<p>\u4f60\u53ef\u4ee5\u4f7f\u7528\u4e00\u4e2a\u51fd\u6570\u540d\u79f0\u6765\u6839\u636e\u7c7b\u6267\u884c\u9002\u5f53\u7684\u5904\u7406\uff08\u51fd\u6570\uff09\u3002<\/p>\n<h3>\u4f7f\u7528\u7684\u4f8b\u5b50<\/h3>\n<pre class=\"post-pre\"><code><span class=\"cp\">&lt;?php<\/span>\r\n<span class=\"c1\">\/\/ \u89aa\u30af\u30e9\u30b9<\/span>\r\n<span class=\"kd\">class<\/span> <span class=\"nc\">ParentClass<\/span> <span class=\"p\">{<\/span>\r\n  <span class=\"k\">public<\/span> <span class=\"k\">function<\/span> <span class=\"n\">output<\/span><span class=\"p\">(){<\/span>\r\n    <span class=\"k\">print<\/span> <span class=\"s1\">'\u89aa\u30af\u30e9\u30b9\u306e\u30e1\u30bd\u30c3\u30c9\u3067\u3059'<\/span><span class=\"mf\">.<\/span><span class=\"s2\">\"<\/span><span class=\"se\">\\n<\/span><span class=\"s2\">\"<\/span><span class=\"p\">;<\/span>\r\n  <span class=\"p\">}<\/span>\r\n<span class=\"p\">}<\/span>\r\n\r\n<span class=\"c1\">\/\/ \u5b50\u30af\u30e9\u30b9 <\/span>\r\n<span class=\"kd\">class<\/span> <span class=\"nc\">ChildClass<\/span> <span class=\"kd\">extends<\/span> <span class=\"nc\">ParentClass<\/span> <span class=\"p\">{<\/span>\r\n  <span class=\"k\">public<\/span> <span class=\"k\">function<\/span> <span class=\"n\">output<\/span><span class=\"p\">(){<\/span>\r\n    <span class=\"k\">print<\/span> <span class=\"s2\">\"\u5b50\u30af\u30e9\u30b9\u306e\u30e1\u30bd\u30c3\u30c9\u304c\u89aa\u30af\u30e9\u30b9\u3092\u30aa\u30fc\u30d0\u30fc\u30e9\u30a4\u30c9\u3057\u307e\u3057\u305f\"<\/span><span class=\"p\">;<\/span> \r\n  <span class=\"p\">}<\/span>\r\n<span class=\"p\">}<\/span>\r\n\r\n<span class=\"nv\">$test<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">ParentClass<\/span><span class=\"p\">();<\/span>\r\n<span class=\"nv\">$test<\/span><span class=\"o\">-&gt;<\/span><span class=\"nf\">output<\/span><span class=\"p\">();<\/span>\r\n\r\n<span class=\"nv\">$test2<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">ChildClass<\/span><span class=\"p\">();<\/span>\r\n<span class=\"nv\">$test2<\/span><span class=\"o\">-&gt;<\/span><span class=\"nf\">output<\/span><span class=\"p\">();<\/span>\r\n<span class=\"cp\">?&gt;<\/span>\r\n\/\/\/\/\u51fa\u529b\u7d50\u679c\/\/\/\/\/\/\r\n\u89aa\u30af\u30e9\u30b9\u306e\u30e1\u30bd\u30c3\u30c9\u3067\u3059\r\n\u5b50\u30af\u30e9\u30b9\u306e\u30e1\u30bd\u30c3\u30c9\u304c\u89aa\u30af\u30e9\u30b9\u3092\u30aa\u30fc\u30d0\u30fc\u30e9\u30a4\u30c9\u3057\u307e\u3057\u305f\r\n<\/code><\/pre>\n<p>\u56e0\u4e3a\u8fdb\u884c\u4e86\u7ee7\u627f\uff0c\u5982\u679c\u51fd\u6570\u540d\u79f0\u53d1\u751f\u51b2\u7a81\uff0c\u7cfb\u7edf\u53ef\u80fd\u4f1a\u95ee\u201c\u8be5\u6267\u884c\u54ea\u4e2a\uff1f\u201d\u4f46\u8fd9\u6ca1\u5173\u7cfb\u3002<\/p>\n<h3>\u8986\u76d6\uff08Override\uff09\u7684\u7528\u6cd5<\/h3>\n<p>\u6bd4\u5982\u8bf4\uff0c\u5982\u679c\u6709\u591a\u4e2a\u7c7b\uff0c\u53ea\u60f3\u5bf9\u5176\u4e2d\u4e00\u4e2a\u7c7b\u8fdb\u884c\u4e0d\u540c\u7684\u5904\u7406\u65f6\uff0c\u53ef\u4ee5\u4f7f\u7528\u5b83\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"cp\">&lt;?php<\/span>\r\n<span class=\"c1\">\/\/ 4\u3064\u306e\u30af\u30e9\u30b9\u3067\u306f\u3001\u89aa\u30af\u30e9\u30b9\u306e\u51e6\u7406\u3092\u305d\u306e\u307e\u307e\u4f7f\u3044\u305f\u3044<\/span>\r\n<span class=\"kd\">class<\/span> <span class=\"nc\">ParentClass<\/span> <span class=\"p\">{<\/span>\r\n  <span class=\"k\">public<\/span> <span class=\"k\">function<\/span> <span class=\"n\">duplicateCheck<\/span><span class=\"p\">(<\/span><span class=\"nv\">$id<\/span><span class=\"p\">){<\/span>\r\n    <span class=\"k\">return<\/span> <span class=\"p\">[];<\/span>\r\n  <span class=\"p\">}<\/span>\r\n<span class=\"p\">}<\/span>\r\n\r\n<span class=\"c1\">\/\/ 1\u3064\u306e\u30af\u30e9\u30b9\u3060\u3051\u3001DB\u306e\u91cd\u8907\u30c1\u30a7\u30c3\u30af\u3092\u3057\u305f\u3044<\/span>\r\n<span class=\"kd\">class<\/span> <span class=\"nc\">ChildClass<\/span> <span class=\"kd\">extends<\/span> <span class=\"nc\">ParentClass<\/span> <span class=\"p\">{<\/span>\r\n  <span class=\"k\">public<\/span> <span class=\"k\">function<\/span> <span class=\"n\">duplicateCheck<\/span><span class=\"p\">(<\/span><span class=\"nv\">$id<\/span><span class=\"p\">){<\/span>\r\n      <span class=\"k\">return<\/span> <span class=\"no\">DB<\/span><span class=\"o\">::<\/span><span class=\"nf\">findxx<\/span><span class=\"p\">(<\/span><span class=\"nv\">$id<\/span><span class=\"p\">);<\/span>\r\n  <span class=\"p\">}<\/span>\r\n<span class=\"cp\">?&gt;<\/span>\r\n<\/code><\/pre>\n<p>\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u53ef\u4ee5\u4f7f\u7528\u8fd9\u4e2a\u9009\u9879\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6211\u5c1d\u8bd5\u56de\u5230\u57fa\u7840\u7684\u57fa\u7840\u4e0a\u3002 \u7ee7\u627f\u662f\u6307\u4f20\u627f\u3002 \u6839\u636e\u5df2\u7ecf\u5b58\u5728\u7684\u7c7b\u521b\u5efa\u65b0\u7684\u7c7b\uff0c\u88ab\u79f0\u4e3a\u7236\u7c7b\u6216\u57fa\u7c7b\u3002 \u65b0\u7684\u7c7b\u88ab\u79f0\u4e3a\u5b50\u7c7b\u3002  [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[227],"class_list":["post-30580","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-227"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>\u3010PHP\u3011\u5173\u4e8e\u7ee7\u627f\u548c\u8986\u76d6 - Blog - Silicon Cloud<\/title>\n<meta name=\"description\" content=\"\u5173\u4e8e\u3010PHP\u3011\u5173\u4e8e\u7ee7\u627f\u548c\u8986\u76d6\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\/\u3010php\u3011\u5173\u4e8e\u7ee7\u627f\u548c\u8986\u76d6\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\u3010PHP\u3011\u5173\u4e8e\u7ee7\u627f\u548c\u8986\u76d6\" \/>\n<meta property=\"og:description\" content=\"\u5173\u4e8e\u3010PHP\u3011\u5173\u4e8e\u7ee7\u627f\u548c\u8986\u76d6\u7684\u6280\u672f\u6587\u7ae0\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/zh\/blog\/\u3010php\u3011\u5173\u4e8e\u7ee7\u627f\u548c\u8986\u76d6\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - Silicon Cloud\" \/>\n<meta property=\"article:published_time\" content=\"2023-06-15T18:06:44+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2025-08-12T11:51:34+00:00\" \/>\n<meta name=\"author\" content=\"\u97f5, \u79d1\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u4f5c\u8005\" \/>\n\t<meta name=\"twitter:data1\" content=\"\u97f5, \u79d1\" \/>\n\t<meta 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