note 119478 added to ref.network

improved version of philippe-at-cyberabuse.org's answer: <?php function cidrconv($net) { $start = strtok($net,"/"); $n = 3 - substr_count($net, "."); if ($n > 0) { for ($i = $n;$i > 0; $i--) $start .= ".0"; } $bits1 = str_pad(decbin(ip2long($start)), 32, "0", STR_PAD_LEFT); $net = (1 << (32 - substr(strstr($net, "/"), 1))) - 1; $bits2 = str_pad(decbin($net), 32, "0", STR_PAD_LEFT); $final = ""; for ($i = 0; $i < 32; $i++) { if ($bits1[$i] == $bits2[$i]) $final .= $bits1[$i]; if ($bits1[$i] == 1 and $bits2[$i] == 0) $final .= $bits1[$i]; if ($bits1[$i] == 0 and $bits2[$i] == 1) $final .= $bits2[$i]; } return array($start, long2ip(bindec($final))); } ?> ---- Server IP: 72.52.91.14 Probable Submitter: 2001:610:600:8925:2556:7bd4:20e7:f74d ---- Manual Page -- http://php.net/manual/en/ref.network.php Edit -- https://master.php.net/note/edit/119478 Del: integrated -- https://master.php.net/note/delete/119478/integrated Del: useless -- https://master.php.net/note/delete/119478/useless Del: bad code -- https://master.php.net/note/delete/119478/bad+code Del: spam -- https://master.php.net/note/delete/119478/spam Del: non-english -- https://master.php.net/note/delete/119478/non-english Del: in docs -- https://master.php.net/note/delete/119478/in+docs Del: other reasons-- https://master.php.net/note/delete/119478 Reject -- https://master.php.net/note/reject/119478 Search -- https://master.php.net/manage/user-notes.php