When i use $HTTP_GET_VARS it does not work on php 5.3

As of 5.3.0 register_long_arrays in php.ini is set to default Off, so variables like $HTTP_GET_VARS will not be defined, it's recommended to turn them off, for performance reasons. Instead, use the superglobal arrays, like $_GET.
to use $HTTP_GET_VARS ,  set register_long_arrays as ON in  php.ini

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