Error: Cannot modify header information

[BradSmith]

This is weird... the store was working fine, but somehow I must have changed something. Some products show up just fine, while other products give me this error :

Warning: Cannot modify header information - headers already sent by (output started at /home/vhosts/rickrushart.com/public_html/includes/languages/english/extra_definitions/CustomFeatured_sidebox_defines.php:31) in /home/vhosts/rickrushart.com/public_html/includes/functions/functions_general.php on line 44

Now, I recognize the "CustomFeatured_sidebox" as the "Rick's Recent Works" table, which I added a graphic to in replace of text in the box header, but I didn't notice any errors until after I moved a product from it's own category to a new one.

Can anyone help out?

The website is, www.RickRushArt.com
The Hockey product works fine, but the products in the Racing category do not.

[BradSmith]

Okay, I removed the...

/public_html/includes/languages/english/extra_definitions/CustomFeatured_sidebox_defines.php


...and now the pages seem to work okay, except the 'Custom Sidebox' header says, "
BOX_HEADING_CUSTOMFEATURED_SIDEBOX"...

[BradSmith]

Somehow there's a communication breakdown, whenever I add the defines PHP back into the folder...

<?php
//
// CustomFeatured Sidebox Mod
// includes/modules/sideboxes/CustomFeatured_sidebox_defines.php

define('BOX_HEADING_CUSTOMFEATURED_SIDEBOX', 'Recent works');

?>


Nothing looks wrong, here, though... so why would adding this file to the location suddenly cause specific products not to work, but other specific products still work perfectly fine?

[Ajeh]

Your first error sounds like you have space(s) or blank line(s) at the end of the file below the closing php tag ?> which sends the error message about:
Warning: Cannot modify header information - headers already sent by

[BradSmith]

...wow... I went into the file and deleted a single space, uploaded it back, and now it appears to be working.

It was literally a SINGLE space. Not even interrupting anything.

[BradSmith]

Well, I just put the img line back to the header spot, and it works perfectly fine. I cannot believe that tiny space totally fried half of the products. Thanks a million and a million.

[Ajeh]

Amazing things what a single typo or space can do to a program, eh?

[panqueconpasas]

Your first error sounds like you have space(s) or blank line(s) at the end of the file below the closing php tag ?> which sends the error message about:
Warning: Cannot modify header information - headers already sent by

So simple, yet such a mind boggler to us php newbies...

[traquau]

Your first error sounds like you have space(s) or blank line(s) at the end of the file below the closing php tag ?> which sends the error message about:
Warning: Cannot modify header information - headers already sent by

Sorry for repeat the same problem, but I can firuge out how to solve it now.
I met the same problem decribed above before, anh some time I solve it successfully by this guidline , but right now the same problem occur ( with another file ) and I do the same, check this file carefully on local , upload it to server and it still..not working . I don't know why ?

[Kim]

What are you using to edit and then upload your files?