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run code in 300+ PHP versions simultaneously
<?php class X { private $t = 5; function fooX() { var_dump($this->t); }} class Y extends X { protected $t = 6; function fooY() { var_dump($this->t); } } var_dump(new Y); (new Y)->fooX(); (new Y)->fooY();
Output for 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
object(Y)#1 (2) { ["t":"X":private]=> int(5) ["t":protected]=> int(6) } int(5) int(6)
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
object(Y)#1 (2) { ["t":protected]=> int(6) ["t":"X":private]=> int(5) } int(5) int(6)

preferences:
191.41 ms | 403 KiB | 330 Q