PHP在运行时创建类方法 [英] php create class method at runtime

问题描述

我想知道是否有一种方法可以在运行时使用php将新方法附加到类上. 我的意思是，不是在实例级别上，而是直接在类上，以便所有新创建的实例都具有此新方法. 这样的事情可以通过反思来完成吗?

I am wondering if there is a way to attach a new method to a class at runtime, in php. I mean, not on an instance level but directly to the class, so that all newly created instances, have this new method. Can such a thing be done with reflection?

谢谢

推荐答案

是的，可以.

下面是在php 5.4.x中的运行时中创建方法的方法.

Below is the way to create method in runtime in php 5.4.x.

匿名函数由从5.3.x开始的Closure类表示.从5.4.x开始，它添加了 Closure :: bind 静态方法来将匿名函数绑定到特定的对象或类.

The anonymous function is represented by Closure class started from 5.3.x. From 5.4.x, it add a Closure::bind static method to bind the anonymous function to a particular object or class.

示例:

class Foo {
     private $methods = array();

     public function addBar() {
       $barFunc = function () {
         var_dump($this->methods);
       };
       $this->methods['bar'] = \Closure::bind($barFunc, $this, get_class());
     }

     function __call($method, $args) {
          if(is_callable($this->methods[$method]))
          {
            return call_user_func_array($this->methods[$method], $args);
          }
     }
 }

 $foo = new Foo;
 $foo->addBar();
 $foo->bar();

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