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--TEST-- Fix UMR in array_user_key_compare (MOPB24) --FILE-- <?php $arr = array("A" => 1, "B" => 1); function array_compare(&$key1, &$key2) { $GLOBALS['a'] = &$key2; unset($key2); return 1; } uksort($arr, "array_compare"); var_dump($a); ?> --EXPECT-- string(1) "B"