如何从父静态函数调用静态子函数? [英] How do I call a static child function from parent static function?

问题描述

如何从父静态函数调用子函数?

How do I call child function from parent static function ?

在php5.3中，有一个名为get_called_class()的内置方法可以从父类调用子方法.但是我的服务器运行的是 php 5.1 .

In php5.3 there is a built in method called get_called_class() to call child method from parent class. But my server is running with php 5.1.

有什么办法可以做到这一点?

Is there any way can do this ?

我想从静态函数调用它.这样我就不能使用"$ this"

I want to call it from a static function . So that I can not use "$this"

所以我应该使用自我"关键字.

So i should use "self" keyword.

在下面的示例中，我的父类是"Test123"，它试图从父类静态函数"myfunc"调用子类函数，例如"self :: test();"

Below example my parent class is "Test123" , from the parent class static function "myfunc" am trying to call child class function like this "self::test();"

abstract class Test123
{

  function __construct()
  {
    // some code here
  }

  public static function myfunc()
  {
    self::test();
  }

  abstract function test();
}

class Test123456 extends Test123
{
  function __construct()
  {
    parent::__construct();
  }

  function test()
  {
    echo "So you managed to call me !!";
  }

}

$fish = new Test123456();
$fish->test();
$fish->myfunc();

推荐答案

编辑:PHP 5.1无法实现您试图实现的目标.没有静态绑定 ^PHP手册 在PHP 5.1中，您需要显式命名子类以调用子函数:Test123456::test()，self在类Test123 >(始终)，并且static关键字不可用于在PHP 5.1中调用静态函数.

What you try to achieve is not possible with PHP 5.1. There is no late static bindings ^{PHP Manual} in PHP 5.1, you need to explicitly name the child class to call the child function: Test123456::test(), self will be Test123 in a static function of the class Test123 (always) and the static keyword is not available to call a static function in PHP 5.1.

相关: 新的自我与新的静态 ； 等同于后期静态绑定(新静态)的PHP 5.2 ?

如果要引用静态父函数，则需要为php 5.1中的函数调用显式命名父(子)子.

If you are referring to a static parent function, then you need to explicitly name the parent (or child) for the function call in php 5.1:

parentClass::func();
Test123456::test();

在PHP 5.3中，您可以使用static关键字 ^PHP手册 来解析被调用类的名称:

In PHP 5.3 you can do this instead with the static keyword ^{PHP Manual} to resolve the called class' name:

static::func();
static::test();

如果这些不是静态的，则只需使用$this ^PHP手册 :

If those are non-static, just use $this ^{PHP Manual}:

$this->parentFunc();
$this->childFunc();

或者，如果名称相同，请使用parent ^PHP手册 :

Or if it has the same name, use parent ^{PHP Manual}:

parent::parentFunc();

(这与您要求的不完全相同，只是为了完整起见将其放在此处).

(which is not exactly what you asked for, just putting it here for completeness).

已针对非常特殊的情况(如后期静态绑定 ^PHP手册 .

Get_called_class() has been introduced for very specific cases like to late static bindings ^{PHP Manual}.

请参见对象继承 ^{PHP手册 >}

这篇关于如何从父静态函数调用静态子函数?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！