In order to get around the problem described in the following post
http://www.zenphoto.org/support/topic.php?id=3383&replies=1#post-20275

my image.php uses the following paging code, instead of the printPageListWithNav function:

" title="">←

         " title=""> →

The above code works as expected for my image page - the navigation links are not displayed if I am on the first or last page.

So, I tried to implement a similar scheme, using two custom functions I defined in a themefunctions.php file:

Next, in my index.php file I included the following:

an then, where I want the paging:

         " title="">←  



         " title=""> →

Now, I am not a PHP coder, so I need a bit of help trying to figure out how to fix the following errors:

Fatal error: Call to a member function getPrevAlbum() on a non-object in C:\wamp\www\zenphoto\themes\boxedblack\themefunctions.php on line 9

If I modify the themefunctions.php file to surround my functions with:

...
class themeFunctions {
... my custom functions go here
}

I get the following:

Fatal error: Call to undefined function hasPrevAlbum() in C:\wamp\www\zenphoto\themes\boxedblack\index.php on line 61

hasPrevAlbum() is a class mathod, you have to call it $_zp_current_album->hasPrevAlbum()
Alternativly you could use functions from templage-functions.php:
http://www.zenphoto.org/documentation/zenphoto/_template-functions.php.html#functiongetPrevAlbum
http://www.zenphoto.org/documentation/zenphoto/_template-functions.php.html#functiongetNextAlbum

Shoot, that should have been so obvious - it`s in the function definition!

Beginner errors. Still, it did not work. I`m giving up, for now.

$_zp_current_album, a global variable, is only available if there is a "current album". For example this is the case on album.php (the thumbnail view) or on image.php (single image view).

I see, thats why it keeps failing for the index.php. Ill try it for the album.php.
Thanks for the info.

You might want to look at our functions guide, we have also functions like getNextPageURL and getNextPageURL you could use for that.

Yes, I did check the functions guide, I need to study it some more.