vendor/symfony/http-foundation/Session/Storage/Handler/RedisSessionHandler.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\Storage\Handler;

use Predis\Response\ErrorInterface;
use Symfony\Component\Cache\Traits\RedisClusterProxy;
use Symfony\Component\Cache\Traits\RedisProxy;

/**
 * Redis based session storage handler based on the Redis class
 * provided by the PHP redis extension.
 *
 * @author Dalibor Karlović <dalibor@flexolabs.io>
 */
class RedisSessionHandler extends AbstractSessionHandler
{
    private $redis;

    /**
     * @var string Key prefix for shared environments
     */
    private $prefix;

    /**
     * @var int Time to live in seconds
     */
    private $ttl;

    /**
     * List of available options:
     *  * prefix: The prefix to use for the keys in order to avoid collision on the Redis server
     *  * ttl: The time to live in seconds.
     *
     * @param \Redis|\RedisArray|\RedisCluster|\Predis\ClientInterface|RedisProxy|RedisClusterProxy $redis
     *
     * @throws \InvalidArgumentException When unsupported client or options are passed
     */
    public function __construct($redis, array $options = [])
    {
        if (
            !$redis instanceof \Redis &&
            !$redis instanceof \RedisArray &&
            !$redis instanceof \RedisCluster &&
            !$redis instanceof \Predis\ClientInterface &&
            !$redis instanceof RedisProxy &&
            !$redis instanceof RedisClusterProxy
        ) {
            throw new \InvalidArgumentException(sprintf('"%s()" expects parameter 1 to be Redis, RedisArray, RedisCluster or Predis\ClientInterface, "%s" given.', __METHOD__, get_debug_type($redis)));
        }

        if ($diff = array_diff(array_keys($options), ['prefix', 'ttl'])) {