使用workerman的mysql或者只要use 别的类都报错

/*
 * 初始化进程实例
 * */
public static function onWorkerStart($worker)
{
    self::$db = new Connection(
        '47.108.144.229',
        '3306',
        'xiangyunyuanlin',
        'yTadwjbzkhB5SJp4',
        'xiangyunyuanlin'
    );
}