how to go to new url after proccess form

[radja]

i have url form like this :

http://server-ampl/?tp=pustaka&menu=peminjam&mode=add

when i press OK button the url still like that. i want my url like this :

http://server-ampl/?tp=pustaka&menu=peminjam

i use header but there is error :
Warning: Cannot modify header information - headers already sent by (output started at H:\server\index .php:7) in H:\server\templ ate\pustaka\pus taka-peminjam.php on line 107

btw, i didnt use header command before but that error still warm me.
tq

[Motoma]

i have url form like this :
http://server-ampl/?tp=pustaka&men u=peminjam&mode =add

when i press OK button the url still like that. i want my url like this :
http://server-ampl/?tp=pustaka&men u=peminjam

i use header but there is error :
Warning: Cannot modify header information - headers already sent by (output started at H:\server\index .php:7) in H:\server\templ ate\pustaka\pus taka-peminjam.php on line 107

btw, i didnt use header command before but that error still warm me.
tq

There are a number of other PHP functions that make use of headers, and it is really hard to know what is causing an error if I cannot see the code. Perhaps you should post some relevant code, and use the [code] tags!

[pbmods]

Warning: Cannot modify header information - headers already sent by (output started at H:\server\index .php:7) in H:\server\templ ate\pustaka\pus taka-peminjam.php on line 107

You're seeing this because your script outputs something on line 7. In order for header functions to work, you have to call them before your script sends anything to the browser.