help me to give explaination........soryyyyyy there is $HTTP_GET_VARS.

php manual gives a good explenation:
http://www.php.net/manual/en/reserved.variables.get.php

$HTTP_GET_VARS is deprecated as of php 4.1.0. Bascially $_GET and $_POST are superglobal, meaning that you do not need the global keyword to access them within funcions or classes.

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