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<?php class Check { private static $instance; public function getInstance($name = null) { if (isset(self::$instance)) { return self::$instance; } self::$instance = $name; return self::$instance; } } $a = new Check; var_dump($a->getInstance('a')); $b = new Check; var_dump($b->getInstance('b')); var_dump($a->getInstance());
Output for git.master, git.master_jit, rfc.property-hooks
string(1) "a" string(1) "a" string(1) "a"

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