PHP link/page referrer
<p>I don't know how to properly explain this, so please bear with me:</p>

<ol>
<li>When a new clicks on create new post/thread/reply .etc, and they are taken to the create new xzy page, they then fill this out the form.</li>
<li>When they fill this out, this are taken to a login/register form.</li>
<li>After they have register/logged-in, they are taken back to the page whence they came (create new xyz or other). </li>
</ol>

<p>How would this be done in PHP? A link referrer of sorts.</p>
