3v4l.org

run code in 300+ PHP versions simultaneously
<?php $seq = 2839067015; $iso = 13; echo sprintf("%X", ($iso << 48) + $seq); echo "\n"; echo ($iso << 48) + $seq; echo "\n"; echo (($iso << 48) | $seq); echo "\n"; echo dechex(($iso << 48) | $seq); echo "\n";

preferences:
40.24 ms | 402 KiB | 5 Q