1--TEST-- 2traverse an array and use its keys to unset GLOBALS 3--FILE-- 4<?php 5 6$arr = array("a" => 1, "b" => 2); 7foreach ($arr as $key => $val) { 8 unset($GLOBALS[$key]); 9} 10 11var_dump($arr); 12echo "Done\n"; 13?> 14--EXPECTF-- 15array(2) { 16 ["a"]=> 17 int(1) 18 ["b"]=> 19 int(2) 20} 21Done 22