Find drupal site root directory path We have hosted one of our Drupal 7 site at Acquia. 

How do I find site root directory - /mnt/www/html/mysite/docroot/?


  I'm using dpr(shell_exec("drush status")); command in devel/php


Is there anyother way to find it?
Use DRUPAL_ROOT.

It is defined in index.php as:

define('DRUPAL_ROOT', getcwd());