title: Is it possible to List Out All the Global variables in PHP?
body: <p>Is it possible to list out all the Global Variable. Such , as to print all session variable we can use <code>print_r($_SESSION);</code> as the same way, if i want to know how many Global variables are define in my site. is it possible?  Please Help.</p>
  
  <p>I need the list which can show me all the Global variables List in PHP. </p>