Error messages on my page

hello,

I got error messages on my page, please help...

http://www.sultan-pizza.de/

http://www.tereshonka.com/

Hi.

This looks like your site has some spam code (possibly hacked?)

Check first this 2 files if they are same as original opencart installation.

Notice: Undefined variable: _POST in /home/sultanpi/public_html/catalog/controller/common/home.php on line 1
Notice: Undefined variable: _POST in /home/sultanpi/public_html/catalog/model/design/layout.php on line 1

how can this happen, these sites are on the sae server... maybe some server setting changes?

you are right after backup it works...