Admin area suddenly showing a blank page

[qwerty94]

What are your myDebug-adm-xxxxxxx.log files showing?
ref: http://www.zen-cart.com/content.php?124-blank-page

[13-Jun-2012 14:11:30 UTC] PHP Fatal error: Cannot redeclare date_diff() in /nfs/c08/h03/mnt/118247/domains/shop.sss-sussex.co.uk/html/samadmin/includes/functions/general.php on line 3001

[DrByte]

That means your /admin/includes/functions/general.php file is the v1.3.8 version of the file.
(Zen Cart v1.3.8a and older are NOT compatible with PHP 5.3)

So, either you're actually running v1.3.8a (instead of v1.3.9h which you stated in your post), or you've installed an addon that replaced core files with old code.

[qwerty94]

That means your /admin/includes/functions/general.php file is the v1.3.8 version of the file.
(Zen Cart v1.3.8a and older are NOT compatible with PHP 5.3)

So, either you're actually running v1.3.8a (instead of v1.3.9h which you stated in your post), or you've installed an addon that replaced core files with old code.

Where about would I find which version I am using? As cant access admin area to see?

[DrByte]

You can find the actual version in the /includes/ vers ion.php file.

But, in many respects technically it doesn't matter at this point.
You're clearly using code that's not compatible with the PHP version on your server.

If I were in your shoes, I would do one of the following:

1 - If you are using v1.3.9a or newer:
a. get the original Zen Cart zip for the version of Zen Cart you're actually using, and unzip that on my computer
b. download a complete set of all the files from your server
c. compare the two sets of files, and fix whatever is broken

2 - If you're actually using v1.3.8a or older:
a. UPGRADE your site to v1.3.9h or v1.5.0

[qwerty94]

define('PROJECT_VERSION_MAJOR', '1');
define('PROJECT_VERSION_MINOR', '3.9h');

So does this mean I am on 3.9h? And shouldn't be having a problem?

[DrByte]

Yes, so that means you need to go fix up the files on your server that belong to an older version, as I mentioned in my first post.

[qwerty94]

Yes, so that means you need to go fix up the files on your server that belong to an older version, as I mentioned in my first post.

Okay, thanks I shall have a look at this later. :)