headers?

Hi all.. Got this script to verify a login against a mysql-databas with several checking for type errors etc. When I wanna login people, I include a file with all my functions ('functions.php') and I a function verify is called upon. the function returns false if user entered wrong user/pass, And if they enter correct info I want them to be redirected to another page.. hm. the headers cant be added (u heard that before?) cuz my login form already started output... function verify($user,$pass){ // some sql queries here... if(count($number)>0){ return false; }else{ header("Location:admin.php"); } } I would like som help using headers in a correct way, or be able to use another way... reg:cleaner