Total numbers node,comments,etc PHP snippets - Views 2.5

Can someone tell me the php snippets for Views,

I want to put the snippet in header, I already have the code for displaying total number of nodes in view, but I need more features e.g. total number of comments, and so on ..

snippet for total number of nodes in view is :

<?php
  global $pager_total_items;
  print $pager_total_items[0] ;
?>