plz help me session header error

[LOSTBOY]

hi experts ,

   

        am an php beginner when try to redirect using header() it throws error as below what can i do for this ..

 

Warning: Cannot modify header information - headers already sent by (output started at c:\wamp\www\rapid\user\login.php:3) in c:\wamp\www\rapid\user\login.php on line 9

 

 

my code

<?php
if(isset($_POST['submit'])): ?>
  <?php
    include_once("clsuser.php");

          $objuser = new user;
  $objuser->validateuser($_POST['uname'], $_POST['pass']);
  header('Location: http://localhost/rapid/main/campaign.php');
  ?>
<?php else: ?>

//HTML CODE HERE

Plz help me ASAP

[PHP Monkeh]

http://www.phpfreaks.com/forums/index.php/topic,37442.0.html

 

Could've saved yourself the trouble by reading the sticky

[LOSTBOY]

thanks for reply

 

ya read it that thread  but i cant understand ....please suggest me by code example

[PFMaBiSmAd]

Your code is using excessive and unnecessary opening and closing php tags. Between the first closing php tag - ?> and the next opening php tag - <?php you have some white-space in your file. This is output to the browser and prevents headers from being sent.

 

When you have a continuous block of php code, put one opening php tag - <?php at the beginning of it and one closing php tag - ?> at the end of it. Don't use three sets of opening and closing php tags like in the posted code.

[revraz]

clsuser.php probably echos something to the browser.

[PFMaBiSmAd]

Line 3 of the file, where the error message reports the output is occurring, is the indented line with -

 

white-space<?php 

[LOSTBOY]

thanks alot for ur suggestions ..let me try

[budimir]

When you are using header you can not send an output to the browser because you will get the error which you are getting.

 

So you can't use echo or print. Neither you can send html output. It need's to be clean PHP code, without output and on the end header.