title: Why didnt wordpress include parameter in the save_post action refernce?
body: <p><a href="http://codex.wordpress.org/Plugin_API/Action_Reference/save_post" rel="nofollow">http://codex.wordpress.org/Plugin_API/Action_Reference/save_post</a></p>
  
  <p>Why Wordpress didnt include <code>$post</code> and <code>$post_ID</code> parameter and their function. I realise these parameter exist only when I checked the source code, What these parameter actually do??
  Don't you think that they need to include every parameter in the action hook reference so that we can assign action to the hook</p>