3v4l.org

run code in 300+ PHP versions simultaneously
<?php $TEST = 'FLAG_????????????????'; $password = 'FLAG_????????????????'; if (strcasecmp($TEST, $password) == 0) echo "Congratulations! The flag is $password"; else echo "incorrect..."; ?>
Output for 8.1.0 - 8.1.28, 8.2.0 - 8.2.19, 8.3.0 - 8.3.7
Congratulations! The flag is FLAG_????????????????
preferences:
45.63 ms | 402 KiB | 62 Q