如何在PHP中引用一个静态常量成员变量 [英] How to refer to a static constant member variable in PHP

问题描述

我有一个类包含成员变量。 当从静态上下文调用类时，PHP中的语法如何访问类中的成员变量？

I have a class with member variables. What is the syntax in PHP to access the member variables from within the class when the class is being called from a static context?

基本上想调用一个类方法（但不创建一个新的对象），但是当类方法被调用时，我想要一个静态常量变量被初始化，需要在不同的类方法之间共享。

Basically I want to call a class method (but not create a new object), but when the class method is called, I want a handful of static constant variables to be initialized that need to be shared among the different class methods.

或者如果有更好的方法，那么我建议，请与我分享（我是新的PHP）
谢谢！

OR if there's a better way to do it then what I'm proposing, please share with me (I'm new to PHP) Thanks!

例如

class example
{
    var $apple;

    function example()//constructor
    {
        example::apple = "red" //this throws a parse error
    }

}

推荐答案

为了简洁，我只提供php 5版本：

For brevity sake I will only offer the php 5 version:

class Example
{
    // Class Constant
    const APPLE = 'red';

    // Private static member
    private static $apple;

    public function __construct()
    {
        print self::APPLE . "\n";
        self::$apple = 'red';
    }
}

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