--TEST-- Closure 012: Undefined lexical variables --FILE-- <?php $lambda = function () use ($i) { return ++$i; }; $lambda(); $lambda(); var_dump($i); $lambda = function () use (&$i) { return ++$i; }; $lambda(); $lambda(); var_dump($i); ?> --EXPECTF-- Notice: Undefined variable: i in %sclosure_012.php on line 2 Notice: Undefined variable: i in %sclosure_012.php on line 7 NULL int(2)