Magento getParam v $ _GET

问题描述

任何人都可以从功能上和良好/不良习惯方面解释差异，为什么其中之一应优先于其他:

Can anyone explain the differences both functionally and in terms of good/bad practice whhy one of these should be preferred over the other:

$getParam = Mage::app()->getRequest()->getParam('getparam');

v

$getParam = $_GET['getparam'];

推荐答案

两者之间存在显着差异. $_GET只是一个数组，例如$_POST.但是，调用Mage::app()->getRequest()->getParam('param_name')将使您可以同时访问GET和POST (此处不包括DELETE和PUT)-请参见下面的代码:

There is a significant difference between the two. $_GET is simply an array, like $_POST. However, calling Mage::app()->getRequest()->getParam('param_name') will give you access to both GET and POST (DELETE and PUT are not included here) - see code below:

lib/Zend/Controller/Request/Http.php

public function getParam($key, $default = null)
{
    $keyName = (null !== ($alias = $this->getAlias($key))) ? $alias : $key;

    $paramSources = $this->getParamSources();
    if (isset($this->_params[$keyName])) {
        return $this->_params[$keyName];
    } elseif (in_array('_GET', $paramSources) && (isset($_GET[$keyName]))) {
        return $_GET[$keyName];
    } elseif (in_array('_POST', $paramSources) && (isset($_POST[$keyName]))) {
        return $_POST[$keyName];
    }

    return $default;
}

此外，如果系统使用Mage::app()->getRequest()->setParam()设置其他参数，则可以通过getParam()功能对其进行访问.在Magento中，您希望始终使用getParam().

In addition, if the system sets other params with Mage::app()->getRequest()->setParam(), it becomes accessible via the getParam() function. In Magento you want to always use getParam().

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