ThinkPHP/Library/Think/Session/Driver/Mysqli.class.php

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<?php
// +----------------------------------------------------------------------
// | ThinkPHP [ WE CAN DO IT JUST THINK IT ]
// +----------------------------------------------------------------------
// | Copyright (c) 2006-2014 http://thinkphp.cn All rights reserved.
// +----------------------------------------------------------------------
// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
// +----------------------------------------------------------------------
// | Author: hainuo<admin@hainuo.info> liu21st <liu21st@gmail.com>
// +----------------------------------------------------------------------
// | change  mysql to mysqli  解决php7没有mysql扩展时数据库存放session无法操作的问题
// +----------------------------------------------------------------------
namespace Think\Session\Driver;
/**
 * 数据库方式Session驱动
 *    CREATE TABLE think_session (
 *      session_id varchar(255) NOT NULL,
 *      session_expire int(11) NOT NULL,
 *      session_data blob,
 *      UNIQUE KEY `session_id` (`session_id`)
 *    );
 */
class Mysqli
{

    /**
     * Session有效时间
     */
    protected $lifeTime = '';

    /**
     * session保存的数据库名
     */
    protected $sessionTable = '';

    /**
     * 数据库句柄
     */
    protected $hander = array();

    /**
     * 打开Session
     * @access public
     * @param string $savePath
     * @param mixed $sessName
     */
    public function open($savePath, $sessName)
    {
        $this->lifeTime = C('SESSION_EXPIRE') ? C('SESSION_EXPIRE') : ini_get('session.gc_maxlifetime');
        $this->sessionTable = C('SESSION_TABLE') ? C('SESSION_TABLE') : C("DB_PREFIX") . "session";
        //分布式数据库
        $host = explode(',', C('DB_HOST'));
        $port = explode(',', C('DB_PORT'));
        $name = explode(',', C('DB_NAME'));
        $user = explode(',', C('DB_USER'));
        $pwd = explode(',', C('DB_PWD'));
        if (1 == C('DB_DEPLOY_TYPE')) {
            //读写分离
            if (C('DB_RW_SEPARATE')) {
                $w = floor(mt_rand(0, C('DB_MASTER_NUM') - 1));