3v4l.org

run code in 500+ PHP versions simultaneously
<?php abstract class Command { protected function configure() {} } abstract class TypedCommand { protected function configure(): void {} } class MyCommand extends Command { protected function configure(): void {} } class MyTypedCommand extends TypedCommand { protected function configure(): void {} }
Output for 8.1.34, 8.2.0 - 8.2.30, 8.3.0 - 8.3.30, 8.4.1 - 8.4.18, 8.5.0 - 8.5.3

preferences:
49.33 ms | 836 KiB | 4 Q