Home php教程 php手册 解决PHP4.0 和 PHP5.0类构造函数的兼容问题

解决PHP4.0 和 PHP5.0类构造函数的兼容问题

Jun 13, 2016 am 11:42 AM
4 compatible function and exist Version of kind solve question

在 PHP5.0 以上版本里,还兼容了 4.0 版本的构造函数的定义规则。如果同时定义了4.0的构造函数和 __construct()函数,则__construct() 函数优先。
为了使类代码同时兼容 PHP4.0 和 5.0,可以采取以下的方式:

复制代码 代码如下:


class MyClass {
 function __construct() { //for PHP5.0
  echo 'this is class2 construct';
 }
 // 为了使类代码同时兼容 PHP4.0 和 5.0
 function MyClass() { //for PHP4.0
  $this->__construct();
 }
}
$c3 = new MyClass;
?>

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