Db::multiConnect PHP Méthode

    protected function multiConnect($master = false)
    {
        static $_config = array();
        if (empty($_config)) {
            // 缓存分布式数据库配置解析
            foreach ($this->config as $key => $val) {
                $_config[$key] = explode(',', $val);
            }
        }
        // 数据库读写是否分离
        if (C('DB_RW_SEPARATE')) {
            // 主从式采用读写分离
            if ($master) {
                // 默认主服务器是连接第一个数据库配置
                $r = 0;
            } else {
                // 读操作连接从服务器
                $r = floor(mt_rand(1, count($_config['hostname']) - 1));
            }
            // 每次随机连接的数据库
        } else {
            // 读写操作不区分服务器
            $r = floor(mt_rand(0, count($_config['hostname']) - 1));
            // 每次随机连接的数据库
        }
        $db_config = array('username' => isset($_config['username'][$r]) ? $_config['username'][$r] : $_config['username'][0], 'password' => isset($_config['password'][$r]) ? $_config['password'][$r] : $_config['password'][0], 'hostname' => isset($_config['hostname'][$r]) ? $_config['hostname'][$r] : $_config['hostname'][0], 'hostport' => isset($_config['hostport'][$r]) ? $_config['hostport'][$r] : $_config['hostport'][0], 'database' => isset($_config['database'][$r]) ? $_config['database'][$r] : $_config['database'][0], 'dsn' => isset($_config['dsn'][$r]) ? $_config['dsn'][$r] : $_config['dsn'][0], 'params' => isset($_config['params'][$r]) ? $_config['params'][$r] : $_config['params'][0]);
        return $this->connect($db_config, $r);
    }