Error: Cannot modify header information

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, https://www.RickRushArt.com
The Hockey product works fine, but the products in the Racing category do not.

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"...

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

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?

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

...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.

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.

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

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

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

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

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 ?

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

Kim:

What are you using to edit and then upload your files?
I use FileZilla as recommeded .

And edit with Notepad , save with utf-8 format.

traquau:

the same problem occur ( with another file )If it keeps happening with different files, you'll have to deal with each file until the errors stop.

Related FAQ:
https://www.zen-cart.com/tutorials/index.php?article=87

If your files are double-spaced, then your FTP program may be translating line-endings incorrectly. Or maybe your files have been damaged by a different FTP program somehow. Sometimes it's easier to start with a fresh set of original files.

You might try using Notepad++, which is more usable than regular Notepad.

traquau:

I use FileZilla as recommeded .

DrByte:

If it keeps happening with different files, you'll have to deal with each file until the errors stop.

Related FAQ:
https://www.zen-cart.com/tutorials/index.php?article=87

If your files are double-spaced, then your FTP program may be translating line-endings incorrectly. Or maybe your files have been damaged by a different FTP program somehow. Sometimes it's easier to start with a fresh set of original files.

You might try using Notepad++, which is more usable than regular Notepad.

Thanks Dr Byte
Already go through these suggestion , but the problem still there.
I try to upload the original file , this work fine . The problem began when I convert this file to local language ( which need to save in utf-8 ) format . Do you think the problem because utf-8 format ?

traquau:

Thanks Dr Byte
Already go through these suggestion , but the problem still there.
I try to upload the original file , this work fine . The problem began when I convert this file to local language ( which need to save in utf-8 ) format . Do you think the problem because utf-8 format ?

Hi All
I think I have solved this problem now and I think it helful in case of someone need localize language in utf-8 format . I don't know why , but when we use Notepad++ as Mr Byte suggested ( thanks very much for your suggestion ) and save file with option **"Encode in UTF-8 without BOM" ** , everything is OK.

Now I need open all my files with Noteplus and save again , take time but I am happy . o:)