{"id":30888,"date":"2024-01-10T05:24:29","date_gmt":"2022-11-11T04:46:48","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e4%bd%bf%e7%94%a8php%e7%b1%bb\/"},"modified":"2025-08-12T21:15:05","modified_gmt":"2025-08-12T13:15:05","slug":"%e4%bd%bf%e7%94%a8php%e7%b1%bb","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e4%bd%bf%e7%94%a8php%e7%b1%bb\/","title":{"rendered":"\u4f7f\u7528PHP\u7c7b"},"content":{"rendered":"

\u9996\u5148\u56e0\u4e3a\u6211\u53ea\u5199\u8fc7JavaScript\uff0c\u6240\u4ee5\u6709\u5f88\u591a\u964c\u751f\u7684\u5199\u6cd5\u3002
\n\u53ef\u80fd\u6709\u9519\u8bef\uff0c\u8bf7\u7ed9\u4e88\u8bc4\u8bba\u3002<\/p>\n

\u8bfe\u5802\u7684\u57fa\u672c\u8bbe\u7f6e<\/p>\n
<?php<\/span>\r\nclass<\/span> User<\/span>\r\n{<\/span>\r\n  \/\/\u30e1\u30f3\u30d0\u30fc<\/span>\r\n  public<\/span> $name<\/span>;<\/span>\r\n  private<\/span> $nickname<\/span>;<\/span>\r\n\r\n  \/\/\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf<\/span>\r\n  public<\/span> function<\/span> __construct<\/span>(<\/span>$name<\/span>,<\/span>$nickname<\/span>){<\/span>\r\n    \/\/\u5f15\u6570\u3092\u30e1\u30f3\u30d0\u30fc\u5909\u6570\u306b\u683c\u7d0d<\/span>\r\n    $this<\/span>-><\/span>name<\/span> =<\/span> $name<\/span>;<\/span>\r\n    $this<\/span>-><\/span>nickname<\/span> =<\/span> $nickname<\/span>;<\/span>\r\n  }<\/span>\r\n}<\/span>\r\n\r\n\/\/\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u5316<\/span>\r\n$user<\/span> =<\/span> new<\/span> User<\/span>(<\/span>'sato'<\/span>,<\/span>'unko'<\/span>);<\/span>\r\n\r\necho<\/span> $user<\/span>-><\/span>name<\/span>;<\/span>\r\necho<\/span> $user<\/span>-><\/span>nickname<\/span>;<\/span>\/\/Fatal error: Cannot access private property<\/span>\r\n\r\n?><\/span>\r\n<\/code><\/pre>\n
\u6784\u9020\u51fd\u6570\u6784\u9020\u51fd\u6570\u4f7f\u7528__construct\u6765\u521b\u5efa\u65b9\u6cd5\u3002<\/p>\n
\u8bbf\u95ee\u6210\u5458\u5bf9\u4e8e\u8bbf\u95ee\u6210\u5458\u53d8\u91cf\uff0c\u53ef\u4ee5\u4f7f\u7528\u7bad\u5934\u7b26\u53f7->\u3002\u548c\u5728JavaScript\u4e2d\u4f7f\u7528this.name\u7c7b\u4f3c\uff1f
\n\u4e0d\u540c\u4e8e$this->$name = $name\uff0c\u5728PHP\u4e2d\u7684\u89c4\u5219\u662f$this->name = $name\u3002<\/p>\n
\u8bbf\u95ee\u4fee\u9970\u7b26<\/p>\n
\n
\u30a2\u30af\u30bb\u30b9\u4fee\u98fe\u5b50\u610f\u5473public\u5916\u90e8\u304b\u3089\u53c2\u7167\u3067\u304d\u308bprivate\u5909\u6570\u3001\u95a2\u6570\u3092\u5ba3\u8a00\u3057\u305f\u30af\u30e9\u30b9\u5185\u306e\u307f\u53c2\u7167\u3067\u304d\u308bprotected\u5909\u6570\u3001\u95a2\u6570\u3092\u5ba3\u8a00\u3057\u305f\u30af\u30e9\u30b9\u3068\u7d99\u627f\u3055\u308c\u305f\u30af\u30e9\u30b9\u304b\u3089\u53c2\u7167\u3067\u304d\u308b\u5982\u679c\u4e0d\u505a\u4efb\u4f55\u58f0\u660e\uff0c\u5c06\u88ab\u89c6\u4e3apublic\u3002<\/p>\n
<?php<\/span>\r\nclass<\/span> User<\/span>\r\n{<\/span>\r\n  $name<\/span>;<\/span>\r\n<\/code><\/pre>\n
\u7ee7\u627f\u7c7b<\/p>\n
<?php<\/span>\r\nclass<\/span> User<\/span>\r\n{<\/span>\r\n  \/\/\u30e1\u30f3\u30d0\u30fc<\/span>\r\n  public<\/span> $name<\/span>;<\/span>\r\n\r\n  \/\/\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf<\/span>\r\n  public<\/span> function<\/span> __construct<\/span>(<\/span>$name<\/span>){<\/span>\r\n    \/\/\u5f15\u6570\u3092\u30e1\u30f3\u30d0\u30fc\u5909\u6570\u306b\u683c\u7d0d<\/span>\r\n    $this<\/span>-><\/span>name<\/span> =<\/span> $name<\/span>;<\/span>\r\n  }<\/span>\r\n\r\n  protected<\/span> function<\/span> changeName<\/span>(<\/span>$new_name<\/span>){<\/span>\r\n    $this<\/span>-><\/span>name<\/span> =<\/span> $new_name<\/span>;<\/span>\r\n  }<\/span>\r\n}<\/span>\r\n\r\n\/\/class\u3092\u7d99\u627f<\/span>\r\nclass<\/span> ChildUser<\/span> extends<\/span> User<\/span>{<\/span>\r\n  public<\/span> function<\/span> subChangeName<\/span>(<\/span>$new_name<\/span>){<\/span>\r\n    \/\/protected\u306e\u95a2\u6570\u306f\u5b50\u30af\u30e9\u30b9\u304b\u3089\u547c\u3076\u3053\u3068\u306f\u53ef\u80fd<\/span>\r\n    $this<\/span>-><\/span>changeName<\/span>(<\/span>$new_name<\/span>);<\/span>\r\n  }<\/span>\r\n};<\/span>\r\n\r\n\/\/\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u5316<\/span>\r\n$user<\/span> =<\/span> new<\/span> User<\/span>(<\/span>'sato'<\/span>);<\/span>\r\necho<\/span> $user<\/span>-><\/span>name<\/span>;<\/span>\/\/sato<\/span>\r\n\r\n\/\/User\u30af\u30e9\u30b9\u3092\u7d99\u627f\u3057\u305f\u30af\u30e9\u30b9\u3092\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u5316<\/span>\r\n$new_user<\/span> =<\/span> new<\/span> ChildUser<\/span>(<\/span>'kato'<\/span>);<\/span>\r\n\r\n$new_user<\/span>-><\/span>subChangeName<\/span>(<\/span>'chinko'<\/span>);<\/span>\r\necho<\/span> $new_user<\/span>-><\/span>name<\/span>;<\/span>\/\/chinko<\/span>\r\n?><\/span>\r\n<\/code><\/pre>\n
\u7ee7\u627f\u7684\u65b9\u5f0f\u8981\u8fdb\u884c\u7ee7\u627f\uff0c\u9700\u8981\u4f7f\u7528extends\u5173\u952e\u5b57\u3002
\n\u203b\u4e0d\u652f\u6301\u591a\u91cd\u7ee7\u627f\u3002<\/p>\n
class \u30af\u30e9\u30b9\u540d extends \u7d99\u627f\u3059\u308b\u30af\u30e9\u30b9{}\r\n<\/code><\/pre>\n
\u91cd\u5199
\n\u5982\u679c\u5728\u5b50\u7c7b\u4e2d\u5b9a\u4e49\u4e86\u4e0e\u7236\u7c7b\u76f8\u540c\u7684\u53d8\u91cf\u548c\u51fd\u6570\uff0c\u5219\u53ef\u4ee5\u8986\u76d6\u7236\u7c7b\u7684\u53d8\u91cf\u548c\u51fd\u6570\u3002<\/p>\n
<?php<\/span>\r\nclass<\/span> User<\/span>\r\n{<\/span>\r\n  \/\/\u30e1\u30f3\u30d0\u30fc<\/span>\r\n  private<\/span> $name<\/span>;<\/span>\r\n\r\n  \/\/\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf<\/span>\r\n  public<\/span> function<\/span> __construct<\/span>(<\/span>$name<\/span>)<\/span>\r\n  {<\/span>\r\n    \/\/\u5f15\u6570\u3092\u30e1\u30f3\u30d0\u30fc\u5909\u6570\u306b\u683c\u7d0d<\/span>\r\n    $this<\/span>-><\/span>name<\/span> =<\/span> $name<\/span>;<\/span>\r\n  }<\/span>\r\n\r\n  public<\/span> function<\/span> changeName<\/span>(<\/span>$new_name<\/span>){<\/span>\r\n    $this<\/span>-><\/span>name<\/span> =<\/span> $new_name<\/span>;<\/span>\r\n  }<\/span>\r\n}<\/span>\r\n\r\n\/\/class\u3092\u7d99\u627f<\/span>\r\nclass<\/span> ChildUser<\/span> extends<\/span> User<\/span>{<\/span>\r\n  public<\/span> function<\/span> changeName<\/span>(<\/span>$new_name<\/span>){<\/span>\r\n    $this<\/span>-><\/span>name<\/span> =<\/span> $new_name<\/span> .<\/span> '\u3067\u3059\u3002'<\/span>;<\/span>\r\n  }<\/span>\r\n};<\/span>\r\n\r\n\/\/\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u5316<\/span>\r\n$user<\/span> =<\/span> new<\/span> User<\/span>(<\/span>'sato'<\/span>);<\/span>\r\n\/\/echo $user->name;\/\/sato<\/span>\r\n\r\n$new_user<\/span> =<\/span> new<\/span> ChildUser<\/span>(<\/span>'sato'<\/span>);<\/span>\r\n\r\n$new_user<\/span>-><\/span>changeName<\/span>(<\/span>'chinko'<\/span>);<\/span>\r\necho<\/span> $new_user<\/span>-><\/span>name<\/span>;<\/span>\/\/chinko\u3067\u3059\u3002<\/span>\r\n?><\/span>\r\n<\/code><\/pre>\n
\u5982\u679c\u4e0d\u60f3\u88ab\u91cd\u5199\uff0c\u8bf7\u4f7f\u7528final\u5173\u952e\u5b57\u3002
\n\u5982\u679c\u88ab\u91cd\u5199\u4e86\uff0c\u5c06\u4f1a\u663e\u793a\u9519\u8bef\u6d88\u606f\u3002<\/p>\n
<?php<\/span>\r\nclass<\/span> User<\/span>\r\n{<\/span>\r\n  \/\/\u30e1\u30f3\u30d0\u30fc<\/span>\r\n  private<\/span> $name<\/span> =<\/span> '\u4f50\u85e4'<\/span>;<\/span>\r\n\r\n  final<\/span> public<\/span> function<\/span> changeName<\/span>(<\/span>$new_name<\/span>){<\/span>\r\n    $this<\/span>-><\/span>name<\/span> =<\/span> $new_name<\/span>;<\/span>\r\n  }<\/span>\r\n}<\/span>\r\n\r\n\/\/class\u3092\u7d99\u627f<\/span>\r\n\/\/Fatal error: Cannot override final method<\/span>\r\nclass<\/span> ChildUser<\/span> extends<\/span> User<\/span>{<\/span>\r\n  public<\/span> function<\/span> changeName<\/span>(<\/span>$new_name<\/span>){<\/span>\r\n    $this<\/span>-><\/span>name<\/span> =<\/span> $new_name<\/span> .<\/span> '\u3067\u3059\u3002'<\/span>;<\/span>\r\n  }<\/span>\r\n};<\/span>\r\n\r\n?><\/span>\r\n<\/code><\/pre>\n
\u5728\u8bfe\u5802\u4e0a\u4f7f\u7528\u5e38\u91cf
\n\u5728\u8bfe\u5802\u5185\u90e8\uff0c\u4f7f\u7528const\u5173\u952e\u5b57\u800c\u4e0d\u662fdefine\u6765\u5b9a\u4e49\u5e38\u91cf\u3002<\/p>\n
<?php<\/span>\r\nclass<\/span> User<\/span>\r\n{<\/span>\r\n\r\n  const<\/span> CITY<\/span> =<\/span> 'TOKYO'<\/span>;<\/span>\r\n\r\n  public<\/span> function<\/span> __construct<\/span>(<\/span>$name<\/span>){<\/span>\r\n      \/\/\u5b9a\u6570\u3092\u8868\u793a<\/span>\r\n      echo<\/span> self<\/span>::<\/span>CITY<\/span>;<\/span>\/\/TOKYO<\/span>\r\n  }<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
const\u7684\u4f7f\u7528\u65b9\u6cd5\u4f7f\u7528self\u5173\u952e\u5b57\u548c::\u6765\u6307\u793a\u7c7b\u672c\u8eab\u3002<\/p>\n
self::\u5b9a\u6570\u540d\r\n<\/code><\/pre>\n
\u7279\u6027\u7528\u4e8e\u4ee3\u7801\u91cd\u7528\u7684\u673a\u5236\u3002\u5b83\u63d0\u4f9b\u4e86\u50cf\u591a\u91cd\u7ee7\u627f\u90a3\u6837\u7684\u6613\u7528\u6027\u3002<\/p>\n
<?php<\/span>\r\n\r\ntrait<\/span> GreetAtrait<\/span>{<\/span>\r\n  public<\/span> function<\/span> morning<\/span>(){<\/span>\r\n    echo<\/span> $this<\/span> -><\/span> name<\/span> .<\/span> '\u3067\u3059\u3002\u304a\u306f\u3088\u3046\u3054\u3056\u3044\u307e\u3059\u3002'<\/span>;<\/span>\r\n  }<\/span>\r\n  public<\/span> function<\/span> evening<\/span>(){<\/span>\r\n    echo<\/span> $this<\/span> -><\/span> name<\/span> .<\/span> '\u3067\u3059\u3002\u3053\u3093\u306b\u3061\u308f\u3002'<\/span>;<\/span>\r\n  }<\/span>\r\n}<\/span>\r\n\r\ntrait<\/span> GreetBtrait<\/span>{<\/span>\r\n  public<\/span> function<\/span> morningB<\/span>(){<\/span>\r\n    echo<\/span> $this<\/span> -><\/span> name<\/span> .<\/span> '\u3067\u3059\u3002\u7720\u3044\u3067\u3059\u3002'<\/span>;<\/span>\r\n  }<\/span>\r\n  public<\/span> function<\/span> eveningB<\/span>(){<\/span>\r\n    echo<\/span> $this<\/span> -><\/span> name<\/span> .<\/span> '\u3067\u3059\u3002\u307e\u3060\u7720\u3044\u3067\u3059\u3002'<\/span>;<\/span>\r\n  }<\/span>\r\n}<\/span>\r\n\r\nclass<\/span> User<\/span>\r\n{<\/span>\r\n  \/\/\u30c8\u30ec\u30a4\u30c8\u3092\u6307\u5b9a<\/span>\r\n  use<\/span> GreetAtrait<\/span>,<\/span>GreetBtrait<\/span>;<\/span>\r\n\r\n  private<\/span> $name<\/span>;<\/span>\r\n\r\n  \/\/\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf<\/span>\r\n  public<\/span> function<\/span> __construct<\/span>(<\/span>$name<\/span>){<\/span>\r\n      \/\/\u5f15\u6570\u3092\u30e1\u30f3\u30d0\u30fc\u5909\u6570\u306b\u683c\u7d0d<\/span>\r\n      $this<\/span>-><\/span>name<\/span> =<\/span> $name<\/span>;<\/span>\r\n  }<\/span>\r\n}<\/span>\r\n\r\n$user<\/span> =<\/span> new<\/span> User<\/span>(<\/span>'\u4f50\u85e4'<\/span>);<\/span>\r\n\r\n$user<\/span> -><\/span> morning<\/span>();<\/span>\/\/\u4f50\u85e4\u3067\u3059\u3002\u304a\u306f\u3088\u3046\u3054\u3056\u3044\u307e\u3059\u3002<\/span>\r\n$user<\/span> -><\/span> evening<\/span>();<\/span>\/\/\u4f50\u85e4\u3067\u3059\u3002\u3053\u3093\u306b\u3061\u308f<\/span>\r\n$user<\/span> -><\/span> morningB<\/span>();<\/span>\/\/\u4f50\u85e4\u3067\u3059\u3002\u7720\u3044\u3067\u3059\u3002<\/span>\r\n$user<\/span> -><\/span> eveningB<\/span>();<\/span>\/\/\u4f50\u85e4\u3067\u3059\u3002\u307e\u3060\u7720\u3044\u3067\u3059\u3002<\/span>\r\n\r\n?><\/span>\r\n\r\n<\/code><\/pre>\n
\u589e\u52a0\u7279\u5f81<\/p>\n
class User{\r\n  use \u30c8\u30ec\u30a4\u30c8\u540d;\r\n<\/code><\/pre>\n
\u6dfb\u52a0\u591a\u4e2a\u7279\u5f81<\/p>\n
class User{\r\n  use \u30c8\u30ec\u30a4\u30c8\u540d,\u30c8\u30ec\u30a4\u30c8\u540d;\r\n<\/code><\/pre>\n
Traits that should be noted.\u867d\u7136\u65b9\u4fbf\uff0c\u4f46\u8fc7\u5206\u4f7f\u7528\u4f1a\u5bfc\u81f4\u590d\u6742\u7684\u4f9d\u8d56\u5173\u7cfb\uff0c\u4ece\u800c\u53d8\u5f97\u9ad8\u5ea6\u8026\u5408\u3002<\/p>\n
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