Cookie and Session Headers

[Tryst]

At the moment my script is throwing a 'Headers Already Sent..." message when I attempt to set a cookie, but before this I start a session.

Is it this that throws the error message? Or is it possible to start a session, and then later on to set a cookie?

Thanks

Tryst

[mullen]

The problem is probably due to you having output something to the screen before trying to set the cookie. Check you haven't ECHOed anything prior to setting the cookie. Also, double check to ensure there are no blank lines before your opening <?php tag (as this is output to the browser too).

[Tryst]

But can you send a session header, and then later on in the script send a cookie header?

Thanks

Tryst

[Tryst]

So does the blank line in the following piece of code constitute as being as 'output'?

<?php
session_start();
/* load in main configuration file for application */
require_once('..\application.php');
require_once('user.php');

/* Checks to see whether the HTML <form> has been posted */
if(isset($_POST['login_submit'])) {
$user = new member_class();
$user->check_login($_POST['username'], $_POST['password'], $_POST['remember']);
}// End POST

In the above code, the 'check_login() function is called from the user.php file, where the cookie is called.

Thanks

Tryst

[1337-Dev]

Yes, a space, text, anything remotely outtpued is counted as "output":

 <?php

session_start();

?>

This would send the error because of the space before the <?php etc..

Regards,

James


EDIT - Sorry didnt read your question properly, no that space wouldn't cause the error because it isnt actually output.

[1337-Dev]

Check that your require'd files dont have output as that would cause an error aswell..

Off Topic:


Where in wales do you live btw?

[Tryst]

So my blank line within my <PHP> tags is ok? But any ouput before the <PHP> tag would be the possible cause for this error?

Tryst

[1337-Dev]

Yes, output in your application.php or user.php, or a simple space before a start of line of code would cause the error but the line in your code wouldn't.

Regards,

James

[Tryst]

I think I found the error - you were right, I was output from with in my required/included files.

Off topic

1337-Dev - I live in Cardiff, well, near Cardiff in a place called Pontypridd. Why are you from the 'Valleys'?

Thanks

Tryst

[1337-Dev]

Glad to have helped .

Im from llantrisant which is about 5 - 10 miles away from ponty awesome.

[mullen]

That's correct... within PHP tags, you can have as many blank lines as you like, but a single space or carriage return before the opening tag will prevent you from being able to send any headers (including setting cookies).

Edit: Hmmm, posts crossed

[1337-Dev]

Edit: Hmmm, posts crossed

I hate it when that happens, make things so confusing..but yeh i suggested the includes etc and its all sorted .

[Tryst]

Haha - evening better, I am from Church Village/Tonteg Which is even closer!

My sister lives in Beddua (is that how you spell it?) :-s

Tryst

[1337-Dev]

Beddau, awesome whats her name? i know basically everyone in beddau

Interesting info for you - my nan is from church village, lol..

[Tryst]

Her name is Heulwen.

She never went to Bryn school, she, well we, went to Cardinal Newman school in Trefforest.

So are you a student, or do you work with PHP?

Tryst