Question

I want to delete every row where the time difference is 5 minutes. I’m using time() as an int.

mysql_query("DELETE FROM users WHERE time()-time > 300");

the query is the problem…

Answer 1

time() is a PHP function — and has absolutely no meaning in SQL.

You should either :

• use one of MySQL’s datetime functions
  • To get an UNIX Timestamp, I suppose unix_timestamp(now()) might do the trick.
• or get time() out of the SQL query, so it’s evaluated by PHP.

For example, using the second idea, I suppose you could do something like this :

mysql_query("DELETE FROM users WHERE " . time() . "-time > 300");