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<?php class Immutable { private $super_secret = 5; } $immutable = new Immutable(); var_dump($immutable); $immutable = (function () { $this->super_secret = 10; return $this; })->call($immutable); var_dump($immutable);
Output for git.master, git.master_jit, rfc.property-hooks
object(Immutable)#1 (1) { ["super_secret":"Immutable":private]=> int(5) } object(Immutable)#1 (1) { ["super_secret":"Immutable":private]=> int(10) }

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