[PHP] Using header in if statement

[Gary Ogilvie]

If I attempt to direct the user to a url with in a if statement using a
header I get the following error message:
 
Warning: Cannot modify header information - headers already sent by
(output started at c:\inetpub\wwwroot\company_search\admin\login.php:3)
in c:\inetpub\wwwroot\company_search\admin\login.php on line 48
 
The code I am trying :
 
if ($myUser == $myReturnedUser && $myPass == $myReturnedPass) {
            ("Location:
http://192.92.0.248/company_search/admin/admin2.php";);
} else {
 
Is there any other way I can try and do this?
 
Many thanks