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') . "\n"; echo getIPStringForFullDNS('158.58.169.254', 'B') . "\n"; echo getIPStringForFullDNS('158.58.169.254', 'C') . "\n"; echo getIPStringForFullDNS('158.58.169.254', 'D') . "\n";
Output for 5.1.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
158.*.*.* 158.58.*.* 158.58.169.* 158.58.169.254
Output for 4.3.0 - 5.0.5
158.58.169.254.*.*.* 158.58.169.254.*.* 158.58.169.254.* 158.58.169.254