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<?php $x = 'cat'; $closure = function () use (&$x) { return $x == 'dog'; }; var_dump($closure); $x = 'dog'; var_dump($closure);
Output for git.master, git.master_jit, rfc.property-hooks
object(Closure)#1 (1) { ["static"]=> array(1) { ["x"]=> &string(3) "cat" } } object(Closure)#1 (1) { ["static"]=> array(1) { ["x"]=> &string(3) "dog" } }

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