Wordpress development script for previews

worpress_dev.php

<?php
/*
Install this in your theme header.php as the first statement 
(next line right after the <?php opening tag)

Change $magic_word to what ever variable you want to use, 
default is "preview"

To use this, go to yoursite.com?preview and a session will 
be created and access to the site will last as long as the 
session endures. Use yoursite.com?preview to refresh the session.

Session length varies. 1-6 hour minimum is common.

When you want to kick it live, just delete these lines.
*/

// Dev preview
$magic_word = 'preview'; 
session_start();
if (isset($_GET[$magic_word])){
	$_SESSION['preview'] = True;
}
if (!$_SESSION['preview']){
	exit();
}