Enable and Disable register Globals for Windows server
1 reg globals enabled
2 reg globals disabled


Steps
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RDP to server
open IIS manager
select domain
select handler mapping and find out "php and edit the path to desired one which means if client requires reg globals disabled select php without reg globals disabled

Normally this will be the path

normal php with reg globals disabled : C:\php
reg globals enabled : C:\php_reg_on

Done