3v4l.org

run code in 300+ PHP versions simultaneously
<?php $ip = '192.168.21.1 - 192.168.21.254'; $ip = explode('-', $ip); list($lower, $upper) = $ip; $lower_dec = (float) sprintf("%u", ip2long($lower)); $upper_dec = (float) sprintf("%u", ip2long($upper)); echo ($lower_dec); echo ($upper_dec);
preferences:
42.75 ms | 402 KiB | 5 Q