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run code in 300+ PHP versions simultaneously
<?php class A { private $a = null; public function setValue($value) { $this->a = $value; } } class B extends A {} $b = new B(); $b->setValue("B"); var_dump($b); $c = unserialize(serialize($b)); var_dump($c);

preferences:
59.58 ms | 402 KiB | 5 Q