3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php function getIPStringForFullDNS($ip, $class) { $limits = array('A' => -3, 'B' => -2, 'C' => -1, 'D' => 0); $limit = $limits[$class]; $ip = implode('.', explode('.', $ip, $limit)); $ip .= str_repeat('.*', abs($limit)); return $ip; } echo getIPStringForFullDNS('158.58.169.254', 'A') . '<br>'; echo getIPStringForFullDNS('158.58.169.254', 'B') . '<br>'; echo getIPStringForFullDNS('158.58.169.254', 'C') . '<br>'; echo getIPStringForFullDNS('158.58.169.254', 'D') . '<br>';
Output for 5.1.0 - 7.1.0
158.*.*.*<br>158.58.*.*<br>158.58.169.*<br>158.58.169.254<br>
Output for 4.3.0 - 5.0.5
158.58.169.254.*.*.*<br>158.58.169.254.*.*<br>158.58.169.254.*<br>158.58.169.254<br>