MySQL更新表行，其中列等于php变量

Question

I know that mysql_* is obsolete today, but I need to use it anyway at the moment. Could you please tell me how can I update a table where column equals php variable?

$qid = $_POST['idc'];
mysql_query("UPDATE `db`.`table` SET `status` = 'canceled' WHERE idc = $qid");

Thank you

Answer 1

 mysql_query("UPDATE `db`.`table` SET `status` = 'canceled' WHERE `idc` = '$qid'");