PHP的魔术方法捉array_push [英] php magic method to catch array_push

问题描述

我要寻找一种方式来拦截 array_push < /一>，因为当这将是检索它的阵列的每个值具有像另一个信息：

I am looking for a way to intercept the action in array_push, because when it will be retrieve it each value of the array has another info like:

class ClassName {

    var $test = array();

    function __set($attr, $value) {
      $this->$attr = 'My extra value'.$value;
    }    

    function index(){
      array_push($this->test, "some val");
      array_push($this->test, "some other val");

      print_r($this->test);

    }
}

$o = new ClassName();
$o->index();

和希望得到的东西，如：

And expected to get something like:

Array
(
    [0] => My extra value some val
    [1] => My extra value some other val
)

但我得到：

Array
(
    [0] => some val
    [1] => some other val
)

感谢所有

推荐答案

而不是使用数组，你可以使用实现了ArrayAccess接口的类。这样，你有超过你时追加到数组中发生的事情完全控制。

Instead of using an array, you can use a class that implements the ArrayAccess interface. This way you have full control over what occurs when you append to the array.

http://php.net/manual/en/class.arrayaccess.php

的缺点是，并非所有的阵列功能将对象（即排序等）上工作，但你可以把像这样：

The drawback is that not all array functions will work on the object (ie sorting etc), but you can push like so:

$object[] = 'new value';

另一种方法是简单地做一个包装函数添加到阵列中。

The alternative is to simply make a wrapper function for adding to the array.

public function addToArray($key, $value) {
   if ($key === null) {
      $this->test[] = 'My extra value ' . $value;
   } else {
      $this->test[$key] = 'My extra value ' . $value;
   }
}

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