Description:
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From manual page: http://www.php.net/tutorial.useful

Asserted:
"These special variables were introduced in PHP » 4.1.0. Before this time, we used the older $HTTP_*_VARS arrays instead, such as $HTTP_SERVER_VARS. Although deprecated, these older variables still exist. (See also the note on old code.)"

But, actually, with accordancy http://php.net/manual/en/tutorial.oldcode.php, global variables like $HTTP_*_VARS , does not exists since 5.4.0


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