Wordpress router.php, for using the built in PHP server with WP sites.

router.php

<?php

$root = $_SERVER['DOCUMENT_ROOT'];
chdir($root);
$path = '/'.ltrim(parse_url($_SERVER['REQUEST_URI'])['path'],'/');
if(file_exists($root.$path))
{
  if(is_dir($root.$path) && substr($path,strlen($path) - 1, 1) !== '/')
	{
		header('location: '.rtrim($path,'/').'/');
		exit;
	}	
	if(strpos($path,'.php') === false) return false;
	else {
		chdir(dirname($root.$path));
		require_once $root.$path;
	}	
}else include_once 'index.php';