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<?php $foo = function () { $cache = null; $closure = function () use (&$cache) { if ($cache === null) { $instance = new StdClass; $instance->param = 0; $cache = $instance; } $cache->param += 1; return $cache; }; return $closure; }; $provider = $foo(); var_dump($provider()); var_dump($provider());
Output for git.master, git.master_jit, rfc.property-hooks
object(stdClass)#3 (1) { ["param"]=> int(1) } object(stdClass)#3 (1) { ["param"]=> int(2) }

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