vendor/symfony/http-foundation/RequestStack.php

<?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;
 
class RequestStack
{
    private $requests = [];
 
    public function push(Request $request)
    {
        $this->requests[] = $request;
    }
 
    public function pop()
    {
        if (!$this->requests) {
            return null;
        }
 
        return array_pop($this->requests);
    }
 
    public function getCurrentRequest()
    {
        return end($this->requests) ?: null;
    }
 
    public function getMasterRequest()
    {
        if (!$this->requests) {
            return null;
        }
 
        return $this->requests[0];
    }
 
    public function getParentRequest()
    {
        $pos = \count($this->requests) - 2;
 
        if (!isset($this->requests[$pos])) {
            return null;
        }
 
        return $this->requests[$pos];
    }
}