3v4l.org

run code in 500+ PHP versions simultaneously
<?php function func(true|null $a = NULL) { var_dump($a); var_export($a); } func(TRUE);
Output for 8.2.31 - 8.2.34, 8.3.0 - 8.3.35, 8.4.1 - 8.4.26, 8.5.0 - 8.5.11
bool(true) true

preferences:
33.98 ms | 1151 KiB | 7 Q