3v4l.org

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);
Output for 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.34, 8.2.0 - 8.2.30, 8.3.0 - 8.3.30, 8.4.1 - 8.4.18, 8.5.0 - 8.5.3
object(B)#1 (1) { ["a":"A":private]=> string(1) "B" } object(B)#2 (1) { ["a":"A":private]=> string(1) "B" }
preferences:
105.56 ms | 2133 KiB | 4 Q