header error

semsem

i get the following error
Warning: Cannot modify header information - headers already sent by (output started at F:\portsaidmall\Register.php:2) in F:\portsaidmall\Register.php on line 10

here is my code:

<?php
//i check to make sure the user clicked the agee to terms check box
//on the previous page
if(!isset($_POST['box1]))
{
header("location: NoTerms.html");
}

i m not sure why i get this error, i have used header("location:") before, and sometimes i get the error, and sometimes i don't get the error, the whole thing is very confusing...can someone please clear this error message up for me

Houdini

Is there any whitespace before the <?php becuase that error is telling you that somewhere there is output prior to the header() function being called.

semsem

i removed the white space, now i get a page not found in internet explorer....i don't know what is going on, because i am sure that the page exists....i feel i need to explain more, so you have a full picture

file1: terms.html
this page is a static html page that has a form with method=post action=Register.php, it also has in the form a text area with the terms and conditions, a check box, and a button...what i want to do is make sure the user checks the checkbox, so in Register.php i have the following code:

<?php
//i check to make sure the user clicked the agee to terms check box
//on the previous page
if(!isset($_POST['box1]))
{
header("location: NoTerms.html");
}

as i said, i removed the white space, and now i get a 404 page not found...i am nost sure what is going on, becausei know that Register.php is there, and NoTerms.html is also there

thanks for your help
sam

Houdini

Is the file in the same directory as the file that is using the header, you might have to give the full path like http://someplace.com/NoTerms.html

brakemach1ne

certain code place in the text area such as "email headers" will cause the 404 error.
Perhaps there's a way to force the proper headers and then parse the posted data.