3v4l.org

run code in 300+ PHP versions simultaneously
<?php class A { } $b = 1; new A($b = 2); var_dump($b);
Output for 7.1.0 - 7.1.25, 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 - 8.1.29, 8.2.0 - 8.2.20, 8.3.0 - 8.3.8
int(2)

preferences:
159.14 ms | 403 KiB | 176 Q