致命错误:未捕获的异常“PDOException”与消息“SQLSTATE[HY000]:一般错误”。

I have this function and it keeps giving out the error "Fatal error: Uncaught exception 'PDOException' with message 'SQLSTATE[HY000]: General error' in..." The error is directing me to the line "$row = $q2->fetchAll(PDO::FETCH_OBJ);". I've searched tonnes for a solution but to no avail. My code appears to be the same format as the examples given in the php docs...I have this function and it keeps giving out th