da php.net per la funzione

mysql_result()

If you want to fetch the result from a mysql query similar to one of these two queries...

$query = mysql_query("SELECT COUNT(*) FROM table");
$query = mysql_query("SELECT LAST_INSERT_ID()");

... you would use mysql_result() like shown below to retrieve the output as an int.

$result = mysql_result($query, 0, 0);