title: wordpress custom page not in admin
body: <p>I am trying to create a page <code>test.php</code> that can use <code>wordpress</code> functions but is not part of the <code>admin/pages</code> section.  so basically if I have a link on my <code>single.php</code> or <code>page.php</code> to direct me to <code>test.php</code> not show the <code>404</code> but actually show me the contents of <code>test.php</code>.  I've heard that i might have to make some changes to the <code>htaccess</code> but I'm not sure how to search for this issue so any help is greatly appreciated.</p>