3v4l.org

run code in 300+ PHP versions simultaneously
<?php echo base_convert( 'ffffffffffffffff', 16, 10 );
Output for 7.4.0 - 7.4.33, 8.0.1 - 8.0.26, 8.1.0 - 8.1.13, 8.2rc1 - rc3
18446744073709552046

preferences:
19.47 ms | 409 KiB | 5 Q