3v4l.org

run code in 300+ PHP versions simultaneously
<?php class A{ private $aaa; function __set($prop, $val){ $this->aaa = $val; } } $a = new A(); $a->prop = 'String prop'; var_dump($a);
Output for 7.3.0 - 7.3.30, 7.4.0 - 7.4.23, 8.0.0 - 8.0.11, 8.1rc1 - rc2
object(A)#1 (1) { ["aaa":"A":private]=> string(11) "String prop" }

preferences:
35.23 ms | 531 KiB | 14 Q