Help! A week before my event and Zencart is down!

[LegendOfTheEpic]

I'm desperate.

I haven't changed anything on Zencart since I installed it months ago. It was working fine. Suddenly, I get word that customers are getting 'kicked out' and can't purchase anything. Upon investigating, I see this code at the top of my Zencart catalog:

Warning: Cannot modify header information - headers already sent by (output started at /home/action/public_html/zencart/includes/languages/english/simple_action/header.php:31) in /home/action/public_html/zencart/includes/init_includes/init_templates.php on line 78

I find this to be weird, obviously. I attempt to login to my Admin interface, and I see, again, a similar error:

Warning: Cannot modify header information - headers already sent by (output started at /home/action/public_html/zencart/admin/includes/languages/english/login.php:31) in /home/action/public_html/zencart/admin/includes/init_includes/init_templates.php on line 36

Then, when I put my password information in, I get this error:

Warning: Cannot modify header information - headers already sent by (output started at /home/action/public_html/zencart/admin/includes/languages/english/login.php:31) in /home/action/public_html/zencart/admin/includes/init_includes/init_templates.php on line 36

Warning: Cannot modify header information - headers already sent by (output started at /home/action/public_html/zencart/admin/includes/languages/english/login.php:31) in /home/action/public_html/zencart/admin/includes/functions/general.php on line 34

I'm going to check if items can still be purchased, but I doubt they can with these types of errors. If, by some chance, purchases go through I will update this thread. But, let's assume they do not.

Please help me! My event is in a week and I need this working! My catalog can be found here if you need to take a look for whatever reason.

Again, I'm desperate. Someone please help me out.

[Kim]

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

[LegendOfTheEpic]

Thank you for responding so quickly.

That link says to remove the space before the first . (period). But, there are a lot of periods, and removing the space in front of the very first one I saw didn't seem to help. Maybe I'm doing this wrong. Can someone talk me through this?

[DrByte]

/zencart/includes/languages/english/simple_action/header.php:31

This means that the error is on line 31 of the file named:
/includes/languages/english/simple_action/header.php

Perhaps you have blank spaces or blank lines after the closing ?>

[LegendOfTheEpic]

All is well. I thank you for your time, patience, and strategies. Last question: How did this happen!? There were multiple errors on multiple .php files, and they all happened sudden; without warning. I ask so that, hopefully, this will never--ever--happen again.

Thank you all again for helping me in this time of grief.

[Kim]

Best guess? Your host restored a backup and corrupted the files is the most common.