Well, I did have a sidebar.php file for my Wordpress theme, but it turns out that sidebar needs to be somewhat dynamic. I had just done this to call the PHP file from my homepage: PHP: <?php include_once "sidebar.php"; ?> I made the sidebar.php file into a custom Wordpress Page template, and I have function calls to fill in the information I need: PHP: <?php the_content(); ?> PHP: <?php the_meta(); ?> Is there a way to call the PHP file now? PHP: <?php include_once "http://website.com/sidebar.php"; ?> and PHP: <?php include_once "http://website.com/sidebar"; ?> Do not work. They error out. Do I even need PHP reference, can I just reference that extension-less link that Wordpress creates(the latter)?