mysql_num_rows

 int mysql_num_rows ( resource $result ) 

説明

Retrieves the number of rows from a result set. This command is only valid for statements like SELECT or SHOW that return an actual result set. To retrieve the number of rows affected by a INSERT, UPDATE, REPLACE or DELETE query, use mysql_affected_rows().

戻り値

The number of rows in a result set on success or FALSE on failure.