3v4l.org

run code in 300+ PHP versions simultaneously
<?php var_dump( $foo ?? 1 ); var_dump( false ?? 2 );
Output for 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 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
int(1) bool(false)
preferences:
191.27 ms | 403 KiB | 209 Q