Can't Go to Checkout

[JmanA9]

Hi, I haven't made any changes to my configuration, but all of a sudden, there's two errors on my admin page, and I can't proceed to the checkout. My webhost might have made some changes to their servers. I don't see any blank lines before and/or after the php tags. When I try to add something to the cart, I get this:

 

Warning: Cannot modify header information - headers already sent by (output started at /public_html/cart/includes/application_top.php:515) in /public_html/cart/includes/functions/general.php on line 29

It's just that error, and a blank page, nothing else.

 

On the admin page, I get these two:

Warning: session_start() [function.session-start]: Cannot send session cookie - headers already sent by (output started at /public_html/cart/admin/includes/filenames.php:56) in /public_html/cart/admin/includes/functions/sessions.php on line 67

Warning: session_start() [function.session-start]: Cannot send session cache limiter - headers already sent (output started at /public_html/cart/admin/includes/filenames.php:56) in /public_html/cart/admin/includes/functions/sessions.php on line 67

 

Here's the relevant sections of those files:

Line 29:
header('Location: ' . $url);

That's all by itself.

 

sessions.php:

function tep_session_start() {
return session_start();
 }

 

If someone can tell me what to do to fix this, I'd really appreciate it. Here are links to the whole files:

 

General.php

Sessions.php

[germ]

Headers Already Sent

 

Error explained at the above link.

 

/cart/includes/application_top.php line 515

 

/cart/admin/includes/filenames.php line 56

[JmanA9]

Headers Already Sent

 

Error explained at the above link.

 

/cart/includes/application_top.php line 515

 

/cart/admin/includes/filenames.php line 56

Thanks. I checked the other files listed in the errors, but not those two. I don't know how the spaces got there, I hadn't changed anything. Oh well.