vendor/topthink/framework/src/think/cache/driver/Memcached.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;

/**
 * Memcached缓存类
 */
class Memcached extends Driver
{
    /**
     * 配置参数
     * @var array
     */
    protected $options = [
        'host'       => '127.0.0.1',
        'port'       => 11211,
        'expire'     => 0,
        'timeout'    => 0, // 超时时间（单位：毫秒）
        'prefix'     => '',
        'username'   => '', //账号
        'password'   => '', //密码
        'option'     => [],
        'tag_prefix' => 'tag:',
        'serialize'  => [],
    ];

    /**
     * 架构函数
     * @access public
     * @param array $options 缓存参数
     */
    public function __construct(array $options = [])
    {
        if (!extension_loaded('memcached')) {
            throw new \BadFunctionCallException('not support: memcached');
        }

        if (!empty($options)) {
            $this->options = array_merge($this->options, $options);
        }

        $this->handler = new \Memcached;

        if (!empty($this->options['option'])) {
            $this->handler->setOptions($this->options['option']);
        }

        // 设置连接超时时间（单位：毫秒）