Custom Path Function

Hello WordPressers. Quandry for you:

I’m looking to define a new function in functions.php so that I can call it everytime I need to call a specific path to a folder.

So essentially, instead of using ‘template_url’ and then adding text to the relevant folder, I would just call the function.

This:

<?php bloginfo (‘template_url’); ?>/library/media/images/example/sample.jpg

Would become something like:

<?php example_folder_path (); ?>/sample.jpg

Know what I mean? Any ideas? Thanks in advance!