Admin index.php suddenly blank

Hello,

I am a pizza. How are you?

I did do a search for this before posting, no go.

I've had a Zen Cart installed and running fine for a few months now. Just today, the /admin/index.php file suddenly went blank. None of the files have been modified in the past month, this is a weird problem that suddenly happened today. So what happens is, I go to https://www.example.com/admin/, it takes me to login.php. I log in. It then redirects me to https://www.example.com/admin/index.php, which is blank.

I've checked the cookies. The cookies exist, showing that I'm authenticated and logged in.

I'm able to browse to the other admin pages such as https://www.example.com/admin/categories.php or https://www.example.com/admin/orders.php, all of those pages work fine. It's just this one index.php page that is blank.

I checked the response headers, it shows an HTTP 200. I do a view source, and there's nothing in there. Not even a doctype or an <html> tag.

I turned on debug logging as outlined in this FAQ, no errors showing at all.

I removed the existing /admin/index.php file and replaced it with a flat HTML file. That worked. I restored the index.php file and placed a "HELLO WORLD" outside the <? ?> php delimiters, that worked fine as well. So this must be a code problem, I just don't know how to narrow this down. Any suggestions or pointers?

Thanks,
I Am A Pizza.

That's interesting...

In index.php I just changed this

$version_check_index=true;

to

$version_check_index=false;

And it started working.

This means that there's a problem with this server attempting to reach http://ping.zen-cart.com/version_id.txt (which is where the Zen Cart version is stored). The code currently uses @file() to query this URL and I tried making a test.php to query any URL, the page kept coming back blank. Hmm...

Is this a problem with the server or PHP? Is there a way to not have the rest of the page rely on the functioning of file()?

Related FAQ article: https://www.zen-cart.com/tutorials/index.php?article=81

That solution worked for me.

Why did this happen?

New settings on the Hosting server? Security Issue?

tom

:frusty:I tried it and I still get a Blank Page. Can't Login Any suggestions? https://www.dulcesencuentros.com

Most blank-page situations are a result of a PHP error caused by one or more incorrect code customizations you've done, or by bad FTP uploads.

This article talks about common causes and supplies some tools to help diagnose:
https://www.zen-cart.com/tutorials/index.php?article=82