Description:
------------
When I unset value of array which equal to $_GET superglobal, php unsets element in $_GET superglobal, but not in this array.

Reproduce code:
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<? 
echo '<pre>'; 
$x = $_GET; 
print_R($x); 
unset($x['id']); 
print_R($_GET); 
?> 

Expected result:
----------------
Array ( [test] => 123 ) 
Array ( [test] => 123 [id] => 5 )

Actual result:
--------------
Array ( [test] => 123 [id] => 5 )
Array ( [test] => 123 )