how different between $_GET and $request->getParameter()

I'm currently studing symfony framework. and I could not found the answer of how differe开发者_开发技巧nt between $_GET and $request->getParameter(). I can understand the $request->getPrameter() can be used for,

if(isset($_GET['test'])){
 $test = $_GET['test'];
}else{
 $test = 'Unknown';
}

to

$request->getParameter('test','Unknown');

and anything else? I was expect it filter XSS but I think it doesn't.

For me, $_GET way is much easier, but I feel like I should use the $request->getParameter()

So, I'd like to know exactly how diffrence.

Thanks! :)

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Use:

$request['parameter']

This is equivalent to $request->getParameter('parameter', null).

Note that $request->getParameter differs from $_GET in that it returns all parameter types. $request->getGetParameter is equivalent to $_GET.

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If you access a request parameter like:

$request->getParameter('parameter');

it can be the value of $_GET['parameter'] or $_POST['parameter'] as well. It is useful as normally you don't care whether the value is coming through post or get method.

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You should infact be using $request->getGetParameter('parameter') if you're specifically after a get parameters.

$request->getGetParameter('parameter') is the equivalent of $_REQUEST['parameter'] which may not result in the desired behaviour.

Also worth noting that the sfWebRequest object is available in your views via $sf_request i.e. $sf_request->getGetParameter('parameter')