3v4l.org

run code in 300+ PHP versions simultaneously
<?php $ip = 'a.b.c.d'; $octets = explode('.', $ip); var_dump($octets); foreach($octets as $key => $octet) { (255 - (int) $octet) < 0 ? $valid = false : $valid = true; if ($valid) echo 'valid'; else echo 'invalid'; echo PHP_EOL; } var_dump($octets);

preferences:
38.51 ms | 402 KiB | 5 Q