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<?php
/*
* This file is part of the Symfony package.
*
* (c) Fabien Potencier <fabien@symfony.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Symfony\Component\HttpFoundation;
/**
* Request stack that controls the lifecycle of requests.
*
* @author Benjamin Eberlei <kontakt@beberlei.de>
*/
class RequestStack
{
/**
* @var Request[]
*/
private $requests = array();
/**
* Pushes a Request on the stack.
*
* This method should generally not be called directly as the stack
* management should be taken care of by the application itself.
*/
public function push(Request $request)
{
$this->requests[] = $request;
}
/**
* Pops the current request from the stack.
*
* This operation lets the current request go out of scope.
*
* This method should generally not be called directly as the stack
* management should be taken care of by the application itself.
*
* @return Request|null
*/
public function pop()
{
if (!$this->requests) {
return null;
}
return array_pop($this->requests);
}
/**
* @return Request|null
*/
public function getCurrentRequest()
{
return end($this->requests) ?: null;
}
/**
* Gets the master Request.
*
* Be warned that making your code aware of the master request
* might make it un-compatible with other features of your framework
* like ESI support.
*
* @return Request|null
*/
public function getMasterRequest()
{
if (!$this->requests) {
return null;
}
return $this->requests[0];
}
/**
* Returns the parent request of the current.
*
* Be warned that making your code aware of the parent request
* might make it un-compatible with other features of your framework
* like ESI support.
*
* If current Request is the master request, it returns null.
*
* @return Request|null
*/
public function getParentRequest()
{
$pos = count($this->requests) - 2;
if (!isset($this->requests[$pos])) {
return null;
}
return $this->requests[$pos];
}
}