PHP headers already sent out.

[VortexS]

Hello guys,

 

I'm having a little trouble with my site I'm working on for school.

When I want to choose a stylesheet, and press apply ( you can test it here: http://s1081065.iie.nl/oop_s1081065/view/admin_config.php) I get the following error: 

 

Warning: Cannot modify header information - headers already sent by (output started at /home/s1081065/domains/s1081065.iie.nl/public_html/oop_s1081065/controller/configurationController.php:1) in /home/s1081065/domains/s1081065.iie.nl/public_html/oop_s1081065/controller/configurationController.php on line 15

 

Code of configurationController.php looks like this: http://i.imgur.com/ILjSjxf.png

 

I just want the header to sent me back to the homepage after applying, and I can't find the mistake I'm making.

If any other files are neccesary to look at, I can post the code of them as well.

[Jade]

Copy/paste the code within [ code]

tags (remove the space.) A picture doesn't particularly help us as 1 - No one is gonna write it all out to modify and potentially fix, if they don't know the solution already. 2 - We may not be able to see the entire contents of the file and/or access Imgur.

[Ciccioo]

you can only use the header() function if there has been no output yet

so, from the moment you print/echo something, any header() call will fail

your code outputs 3 tabs before executing the script, which invalidates the header() call

[bbtgp]

<?php should the first line in your code. Anything before that (unless its captured in ob_start) will be sent to the client including the headers. It looks like you need to remove the spaces/tabs before <?php

[VortexS]

Thanks for your help guys! I'm always having problems with tabs and spaces that float around.