vendor/topthink/framework/src/think/cache/driver/Redis.php

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<?php
// +----------------------------------------------------------------------
// | ThinkPHP [ WE CAN DO IT JUST THINK ]
// +----------------------------------------------------------------------
// | Copyright (c) 2006~2021 http://thinkphp.cn All rights reserved.
// +----------------------------------------------------------------------
// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
// +----------------------------------------------------------------------
// | Author: liu21st <liu21st@gmail.com>
// +----------------------------------------------------------------------
declare (strict_types = 1);

namespace think\cache\driver;

use think\cache\Driver;

/**
 * Redis缓存驱动，适合单机部署、有前端代理实现高可用的场景，性能最好
 * 有需要在业务层实现读写分离、或者使用RedisCluster的需求，请使用Redisd驱动
 *
 * 要求安装phpredis扩展：https://github.com/nicolasff/phpredis
 * @author    尘缘 <130775@qq.com>
 */
class Redis extends Driver
{
    /** @var \Predis\Client|\Redis */
    protected $handler;

    /**
     * 配置参数
     * @var array
     */
    protected $options = [
        'host'       => '127.0.0.1',
        'port'       => 6379,
        'password'   => '',
        'select'     => 0,
        'timeout'    => 0,
        'expire'     => 0,
        'persistent' => false,
        'prefix'     => '',
        'tag_prefix' => 'tag:',
        'serialize'  => [],
    ];

    /**
     * 架构函数
     * @access public
     * @param array $options 缓存参数
     */
    public function __construct(array $options = [])
    {
        if (!empty($options)) {
            $this->options = array_merge($this->options, $options);
        }

        if (extension_loaded('redis')) {
            $this->handler = new \Redis;

            if ($this->options['persistent']) {