3v4l.org

run code in 300+ PHP versions simultaneously
<?php declare(strict_types=1); $bytes = pack("P", 101796507803451406); $encoded = base64_encode($bytes); echo $encoded; $bytes = base64_decode($encoded); $result = unpack("P", $bytes); print_r($result);
Output for 8.3.0 - 8.3.30, 8.4.1 - 8.4.18, 8.5.0 - 8.5.3
DgAAb2KnaQE=Array ( [1] => 101796507803451406 )

preferences:
43.9 ms | 478 KiB | 5 Q