I solved my forms question so I edit most!
Deleting mysql row:
This code will delete all rows where colum date is less than $todaydate.
How can I delete rows where colum date is not $todaydate and colum catagory is equal to $value.
Thanks
if( $delete_old_content == 1 ){
MySQLQuery($DB_DBName,"DELETE FROM $DB_TBLName WHERE date < $todaydate");
}