vendor/symfony/http-foundation/Session/Attribute/AttributeBag.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\Session\Attribute;

/**
 * This class relates to session attribute storage.
 *
 * @implements \IteratorAggregate<string, mixed>
 */
class AttributeBag implements AttributeBagInterface, \IteratorAggregate, \Countable
{
    private $name = 'attributes';
    private $storageKey;

    protected $attributes = [];

    /**
     * @param string $storageKey The key used to store attributes in the session
     */
    public function __construct(string $storageKey = '_sf2_attributes')
    {
        $this->storageKey = $storageKey;
    }

    /**
     * {@inheritdoc}
     */
    public function getName()
    {
        return $this->name;
    }

    public function setName(string $name)
    {
        $this->name = $name;
    }

    /**
     * {@inheritdoc}
     */
    public function initialize(array &$attributes)
    {
        $this->attributes = &$attributes;
    }

    /**
     * {@inheritdoc}
     */
    public function getStorageKey()
    {
        return $this->storageKey;