{"id":30651,"date":"2023-02-25T06:55:38","date_gmt":"2023-03-03T19:04:09","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e3%80%90php%e3%80%91%e5%85%b3%e4%ba%8e%e8%ae%bf%e9%97%ae%e6%9d%83%e9%99%90\/"},"modified":"2025-08-12T20:11:13","modified_gmt":"2025-08-12T12:11:13","slug":"%e3%80%90php%e3%80%91%e5%85%b3%e4%ba%8e%e8%ae%bf%e9%97%ae%e6%9d%83%e9%99%90","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e3%80%90php%e3%80%91%e5%85%b3%e4%ba%8e%e8%ae%bf%e9%97%ae%e6%9d%83%e9%99%90\/","title":{"rendered":"\u3010PHP\u3011\u5173\u4e8e\u8bbf\u95ee\u6743\u9650"},"content":{"rendered":"

\u8bbf\u95ee\u4fee\u9970\u7b26\u662f\u4ec0\u4e48<\/h2>\n

\u4e3a\u4e86\u786e\u4fdd\u7a0b\u5e8f\u4e2d\u53d8\u91cf\u548c\u65b9\u6cd5\u4e0d\u4f1a\u91cd\u590d\u547d\u540d\uff0c\u53ef\u4ee5\u4f7f\u7528\u53d8\u91cf\u548c\u51fd\u6570\u7684\u4f5c\u7528\u57df\u3002<\/p>\n

\u8bbf\u95ee\u4fee\u9970\u7b26\u7684\u4f7f\u7528\u4e0e\u79cd\u7c7b<\/h2>\n

\u516c\u5171\u7684<\/h3>\n

\u5728\u8bfe\u5802\u5185\u5916\uff0c\u90fd\u53ef\u4ee5\u4ece\u4efb\u4f55\u5730\u65b9\u8bbf\u95ee\u3002<\/p>\n

<?php<\/span>\r\n\r\nclass<\/span> Myclass<\/span> {<\/span>\r\n  public<\/span> $public<\/span> =<\/span> 'public'<\/span>;<\/span>\r\n\r\n  public<\/span> function<\/span> printhello<\/span>()<\/span> {<\/span>\r\n    echo<\/span> $this<\/span>-><\/span>public<\/span>;<\/span>\r\n  }<\/span>\r\n}<\/span>\r\n\r\n$obj<\/span> =<\/span> new<\/span> Myclass<\/span>;<\/span>\r\necho<\/span> $obj<\/span>-><\/span>public<\/span>;<\/span> \/\/\u30d7\u30ed\u30d1\u30c6\u30a3\u306e\u547c\u3073\u51fa\u3057<\/span>\r\necho<\/span> $obj<\/span>-><\/span>printhello<\/span>();<\/span> \/\/\u30e1\u30bd\u30c3\u30c9\u306e\u547c\u3073\u51fa\u3057<\/span>\r\n\r\n\/\/=> public public <\/span>\r\n\r\n<\/code><\/pre>\n
\u53d7\u4fdd\u62a4\u7684 h\u00f9 de)<\/h3>\n
\u53ef\u4ee5\u4ece\u8be5\u7c7b\u548c\u5176\u7ee7\u627f\u7c7b\u4e2d\u8bbf\u95ee\u3002<\/p>\n
<?php<\/span>\r\n\r\nclass<\/span> Myclass<\/span> {<\/span>\r\n  protected<\/span> $protected<\/span> =<\/span> 'protected'<\/span>;<\/span>\r\n\r\n  public<\/span> function<\/span> printhello<\/span>()<\/span> {<\/span>\r\n    echo<\/span> $this<\/span>-><\/span>protected<\/span>;<\/span>\r\n  }<\/span>\r\n}<\/span>\r\n\r\nclass<\/span> Myclass2<\/span> extends<\/span> Myclass<\/span> {<\/span>\r\n  public<\/span> function<\/span> printhello2<\/span>()<\/span> {<\/span>\r\n    echo<\/span> $this<\/span>-><\/span>protected<\/span>;<\/span>\r\n  }<\/span>\r\n}<\/span>\r\n\r\n$obj<\/span> =<\/span> new<\/span> Myclass2<\/span>;<\/span>\r\necho<\/span> $obj<\/span>-><\/span>protected<\/span>;<\/span>\r\necho<\/span> $obj<\/span>-><\/span>printhello2<\/span>();<\/span>\r\n\r\n\/\/ =><\/span>\r\n\/\/ Fatal error: Uncaught Error: Cannot access protected property Myclass2::$protected in \/var\/www\/html\/php2\/47\/C.php:18 Stack trace: #0 {main} thrown in \/var\/www\/html\/php2\/47\/C.php on line 18<\/span>\r\n\/\/ protected<\/span>\r\n\r\n<\/code><\/pre>\n
\u79c1\u4eba\u7684<\/h3>\n
\u53ea\u80fd\u4ece\u8fd9\u4e2a\u73ed\u7ea7\u8bbf\u95ee<\/p>\n
<?php<\/span>\r\n\r\nclass<\/span> Myclass<\/span> {<\/span>\r\n  private<\/span> $private<\/span> =<\/span> 'private'<\/span>;<\/span>\r\n\r\n  public<\/span> function<\/span> printhello<\/span>()<\/span> {<\/span>\r\n    echo<\/span> $this<\/span>-><\/span>private<\/span>;<\/span>\r\n  }<\/span>\r\n}<\/span>\r\n\r\n$obj<\/span> =<\/span> new<\/span> Myclass<\/span>;<\/span>\r\necho<\/span> $obj<\/span>-><\/span>private<\/span>;<\/span> \/\/\u547c\u3073\u51fa\u305b\u306a\u3044<\/span>\r\necho<\/span> $obj<\/span>-><\/span>printhello<\/span>();<\/span> \/\/\u547c\u3073\u51fa\u305b\u308b<\/span>\r\n\r\n\/\/ =><\/span>\r\n\/\/ Fatal error: Uncaught Error: Cannot access private property Myclass::$private in \/var\/www\/html\/php2\/47\/B.php:12 Stack trace: #0 {main} thrown in \/var\/www\/html\/php2\/47\/B.php on line 12<\/span>\r\n\/\/ private<\/span>\r\n\r\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"
\u8bbf\u95ee\u4fee\u9970\u7b26\u662f\u4ec0\u4e48 \u4e3a\u4e86\u786e\u4fdd\u7a0b\u5e8f\u4e2d\u53d8\u91cf\u548c\u65b9\u6cd5\u4e0d\u4f1a\u91cd\u590d\u547d\u540d\uff0c\u53ef\u4ee5\u4f7f\u7528\u53d8\u91cf\u548c\u51fd\u6570\u7684\u4f5c\u7528\u57df\u3002 \u8bbf\u95ee\u4fee\u9970\u7b26\u7684\u4f7f\u7528\u4e0e\u79cd\u7c7b  […]<\/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-30651","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-227"],"yoast_head":"\n\u3010PHP\u3011\u5173\u4e8e\u8bbf\u95ee\u6743\u9650 - Blog - Silicon Cloud<\/title>\n<meta name=\"description\" content=\"\u5173\u4e8e\u3010PHP\u3011\u5173\u4e8e\u8bbf\u95ee\u6743\u9650\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\u8bbf\u95ee\u6743\u9650\/\" \/>\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\u8bbf\u95ee\u6743\u9650\" \/>\n<meta property=\"og:description\" content=\"\u5173\u4e8e\u3010PHP\u3011\u5173\u4e8e\u8bbf\u95ee\u6743\u9650\u7684\u6280\u672f\u6587\u7ae0\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/zh\/blog\/\u3010php\u3011\u5173\u4e8e\u8bbf\u95ee\u6743\u9650\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - 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