在设置类属性时调用函数 [英] Call a function while setting class properties

问题描述

在PHP（5.2或5.3）中设置类属性时访问函数？

Is accessing functions while setting class properties possible in PHP (5.2 or 5.3) ?

class DAOClass {

   var $someProperty = SomeObject::staticMethod('readConfigProperty');

}

推荐答案

不可能，因为您必须使用常量值初始化属性。甚至不可能这样做：

It is not possible because you have to initialize the properties with constant values. It isn't even possible to do this:

var $property = array(0);

你想做什么的方法是在类构造函数中：

The way to do what you want to do is inside the class constructor:

class DAOClass {

    var $someProperty;

    public function __construct() {
         $this->someProperty = SomeObject::staticMethod('readConfigProperty');
    }
}

注意，使用 var 声明属性不是首选方法。改为使用 private ， protected 或 public 以及其可见性（ var 默认为 public ）。

As a side note, using var to declare properties is not the preferred way. Use private, protected or public instead to declare a property along with its visibility (var defaults to public).

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