如何在php中找到mysql中一个字段的真实表名？

Question

I have this query in my PHP code:

SELECT usr.user_id,online.online_totime
 FROM users AS usr
 LEFT JOIN online_users AS online ON online.online_user=usr.user_id

I want to find tables in this query with PHP. I use mysql_field_table and it returns "usr" and "online" as table names: those are not the real names. How I can find real table names of fields?

This query only is an example. Please don't advise me not to use AS synonym.

Answer 1

You could parse the query, as one commenter of the php.net documentation suggests.