vendor/symfony/symfony/src/Symfony/Component/HttpFoundation/ResponseHeaderBag.php

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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;

/**
 * ResponseHeaderBag is a container for Response HTTP headers.
 *
 * @author Fabien Potencier <fabien@symfony.com>
 */
class ResponseHeaderBag extends HeaderBag
{
    const COOKIES_FLAT = 'flat';
    const COOKIES_ARRAY = 'array';

    const DISPOSITION_ATTACHMENT = 'attachment';
    const DISPOSITION_INLINE = 'inline';

    /**
     * @var array
     */
    protected $computedCacheControl = array();

    /**
     * @var array
     */
    protected $cookies = array();

    /**
     * @var array
     */
    protected $headerNames = array();

    /**
     * Constructor.
     *
     * @param array $headers An array of HTTP headers
     */
    public function __construct(array $headers = array())
    {
        parent::__construct($headers);

        if (!isset($this->headers['cache-control'])) {
            $this->set('Cache-Control', '');
        }
    }

    /**
     * {@inheritdoc}
     */
    public function __toString()
    {