3v4l.org

run code in 500+ PHP versions simultaneously
<?php var_dump(2**53); var_dump(2**53 + 1); var_dump(2**53 == 2**53 + 1);
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
int(9007199254740992) int(9007199254740993) bool(false)
preferences:
49.65 ms | 839 KiB | 4 Q