ExecScript can run any command from command line as would be done via web.
Copy execScript.php to same directory as index.php and .htaccess files.
Go to command line to this directory and type:
php execScript.php welcome myhost.com
This would be the same than call:
Remember to change myhost.com to an appropiate vhost.
To install in production environments, it is recomendable to move execScript out of document root.
Modify last line of execScript.php to find the relative path for index.php on this new location.
Also, remember to change 'myhost.com' for your virtual host. This is only used to set $_SERVER['HTTP_HOST'] to allow different environments.