调用在 php 中定义为对象变量的匿名函数 [英] Calling anonymous functions defined as object variables in php

问题描述

我有这样的 php 代码:

I have php code like:

class Foo {
  public $anonFunction;
  public function __construct() {
    $this->anonFunction = function() {
      echo "called";
    }
  }
}

$foo = new Foo();
//First method
$bar = $foo->anonFunction();
$bar();
//Second method
call_user_func($foo->anonFunction);
//Third method that doesn't work
$foo->anonFunction();

在php中有没有办法可以使用第三种方法来调用定义为类属性的匿名函数?

Is there a way in php that I can use the third method to call anonymous functions defined as class properties?

谢谢

推荐答案

不是直接的.$foo->anonFunction(); 不起作用，因为 PHP 会尝试直接调用该对象上的方法.它不会检查是否存在存储可调用的名称的属性.不过你可以拦截方法调用.

Not directly. $foo->anonFunction(); does not work because PHP will try to call the method on that object directly. It will not check if there is a property of the name storing a callable. You can intercept the method call though.

将此添加到类定义

  public function __call($method, $args) {
     if(isset($this->$method) && is_callable($this->$method)) {
         return call_user_func_array(
             $this->$method, 
             $args
         );
     }
  }

在

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