Fatal Error:

[tri_nut]

I don't know what the problem is or how to explain it but I keep getting this error:

Fatal error: Call to undefined function: get_header() in /homepages/17/d245651204/htdocs/index.php on line 1

on my website, here's the site.

(URL deleted -- mod.)

I don't get what's wrong.

[NogDog]

The problem is that the file mentioned in the error message is trying to call a function named "get_header()", but that is not a built-in PHP function and has not been defined as a user-defined function in your script. Whether it's supposed to be the PHP get_headers() function or if you need to include a file that defines it, or some other issue, there's no way for us to know for sure based just on that information.