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<?php class Kitchen { private $yummy = 'cake'; } $kitchen = new Kitchen(); $sweetsThief = Closure::bind(function & (Kitchen $kitchen) { return $kitchen->yummy; }, null, $kitchen); $cake = & $sweetsThief($kitchen); $cake = 'lie'; var_dump('the cake is a ' . $sweetsThief($kitchen));

preferences:
36.86 ms | 402 KiB | 5 Q