gistfile1.php

<?php
$pageURL = 'http';
 if ($_SERVER["HTTPS"] == "on") {$pageURL .= "s";}
 $pageURL .= "://";
 if ($_SERVER["SERVER_PORT"] != "80") {
  $pageURL .= $_SERVER["SERVER_NAME"].":".$_SERVER["SERVER_PORT"].$_SERVER["REQUEST_URI"];
 } else {
  $pageURL .= $_SERVER["SERVER_NAME"].$_SERVER["REQUEST_URI"];
 }
if (!is_user_logged_in() && $pageURL!=wp_login_url())
{
	echo wp_login_url().$_SERVER["QUERY_STRING"];
	echo " ".$_SERVER["SERVER_NAME"].$_SERVER["REQUEST_URI"];
}
 ?>