Nice URLS PHP .htaccess

.htaccess
RewriteEngine On
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.*)$ $1.php [L,QSA]
# http://domain/about -> http://domain/about.php
 
--------------------------------------------------
 
.htaccess
RewriteEngine On
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.*)$ index.php?q=$1 [L,QSA]
# http://domain/about -> http://domain/index.php?q=about
 
<?php
// $url_data is an array
$url_data = explode("/",$HTTP_SERVER_VARS['PATH_INFO']);
?>