变量引用作为函数参数 [英] Variable Reference as Function Argument

问题描述

有关具有动作帮助程序的Zend应用程序的全部信息.

All about a Zend Application with an action helper.

我想通过函数取消设置一些数组对.

helper:

class Application_Controller_Action_Helper_TestHelper extends Zend_Contr[...]
{    
    public function direct(&$array)
    {
        if(isset($array['key']))
            unset($array['key']);
    }
}

controller:

$this->_helper->TestHelper($var);

如何使它正常工作?

推荐答案

您还必须将其作为参考传递:
$this->_helper->TestHelper(&$var);

You must also pass it as reference:
$this->_helper->TestHelper(&$var);

更新: Ups，我关闭了我的错误.您(现在是我)正在收到错误因为...

UPDATE: Ups, I had my errors turned off. You (and now me) are getting the error because...

在函数调用上没有参考符号-仅在函数上 定义.仅函数定义就足以正确传递 通过引用的论点.从PHP 5.3.0开始，您将收到警告 说您使用&时不赞成使用通过引用传递时间" 在foo(& $ a);中.

There is no reference sign on a function call - only on function definitions. Function definitions alone are enough to correctly pass the argument by reference. As of PHP 5.3.0, you will get a warning saying that "call-time pass-by-reference" is deprecated when you use & in foo(&$a);.

ZF的HelperBroker使用return call_user_func_array(array($helper, 'direct'), $args);调用您的direct()方法.检查文档，但看来call_user_func_array通过了引用，尽管有一些怪癖.

ZF's HelperBroker uses return call_user_func_array(array($helper, 'direct'), $args); to call your direct() method. Check the docs, but it seems call_user_func_array passes by reference, although with several quirks.

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