setcookie PHP3 != PHP4 ?

spectacell

Hello!

I've written a small program in PHP out of a book. It involves making cookies. The book is about PHP3 and on my server I have PHP4.

When I run the code I get this error:

Warning: Cannot add header information - headers already sent by (output started at /home/httpd/vhosts/sunesha.nu/httpdocs/test/added_items.php:5) in /home/httpd/vhosts/sunesha.nu/httpdocs/test/added_items.php on line 22

the code on that line looks like this:
setcookie ("items_tray[$total_items]", $selected_item_no);

I wonder if there are any big difference between PHP3 and 4 when it comes to setting cookies. Or is it maybe some settings on the server that is wrong?

Hope you understand my problem. Just reply and ask for more info if you like.

Thanks.
Best regards,
Emil Hansson

floR

PHP4 can supposedly set multiple cookies (although I have failed to do that until now) whereas PHP3 can not.

BUT what you seem to be doing, is setting a cookie after the PHP has written data to the client. Cookie should be set before sending anything else to the client, as it will be part of the header information.

So:

...will give you that error.

Hope this helps.

spectacell

Thanks for the answer.

I tried that but it didn't work...

floR

Maybe it would make things clearer if you would post the code of the PHP page up until the line with setcookie.

netizen

If you don't have content passing before the cookie, make sure you don't have any whitespaces or breaks in the code.

ie.


<?php
// code snippets
?>

<?php
// code snippets
?>

You will notice a space at the beginning of the code and between tags. These are whitespaces/breaks that will be passed on as header content.

spectacell

ah thank you very much netizen...that solved my problem! =)

Thank you too flor for taking time!

Best regards
Emil

noodles

I think to clarify HEADER content, I had sucessfully created a cookie ONLY when it was the very first line of code on the site!

This worked only because we are still testing the site and using a hidden filepath www.xxx.com/hidden.php rather www.xxx.com

So if this is the case, there would be no way to create a cookie using setcookie, unless index.php can be used for an index page?

I have tried pasting the code from the site mentioned above, into a new site I'm working on and the code will not work once a few pages of the site have been clicked through!

Any advice?
Thanks, Noodles