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']; 
Add a comment |
2 Answers
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; } 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().
answered Nov 23, 2012 at 18:10
Joseph at SwiftOtter
4,3215 gold badges39 silver badges56 bronze badges
4 Comments
benmarks
Also gives access to params parsed from the url e.g. site.com/foo/bar/baz/bip/bop/boom/bum would have params bip = bop and boom = bum
Joseph at SwiftOtter
Ah, yes - can't believe I missed that :)
Buttle Butkus
And what exacly IS a "param", if not a request parameter (part of the url)? Why would you use
setParam()?Joseph at SwiftOtter
A param in Magento is a helper for a combined array of the values found in the url, GET and POST variables. I don't see much usage for
setParam() other than to filter or parse values before they get to the system (in a predispatch observer). That isn't something that is used often, but it is helpful when you need it.Mage::app()->getRequest()->getParam('getparam'); Will return you 'getparam' if it is send with GET, POST (not sure about DELETE, PUT ...) request. Did not work with Magento but if there parameters that sent through routing. I would expect them also being accessible through that function.
$_GET contains only parameters sent through GET
$_POST contains only parameters sent through POST
