note 37786 added to function.ip2long

The following script will print out subnet statistics when you supply the IP Address and Subnet Mask. Usefull to calculate the broadcast address and network address as well as the number of hosts and the range of IP addresses in the subnet. #!/usr/local/bin/php <? $ip_addr = "172.14.1.57"; $subnet_mask = "255.255.255.0"; $ip = ip2long($ip_addr); $nm = ip2long($subnet_mask); $nw = ($ip & $nm); $bc = $nw | (~$nm); echo "IP Address: " . long2ip($ip) . "\n"; echo "Subnet Mask: " . long2ip($nm) . "\n"; echo "Network Address: " . long2ip($nw) . "\n"; echo "Broadcast Address: " . long2ip($bc) . "\n"; echo "Number of Hosts: " . ($bc - $nw - 1) . "\n"; echo "Host Range: " . long2ip($nw + 1) . " -> " . long2ip($bc - 1) . "\n"; ?> Produces the output: IP Address: 172.14.1.57 Subnet Mask: 255.255.255.0 Network Address: 172.14.1.0 Broadcast Address: 172.14.1.255 Number of Hosts: 254 Host Range: 172.14.1.1 -> 172.14.1.254 ---- Manual Page -- http://www.php.net/manual/en/function.ip2long.php Edit -- http://master.php.net/manage/user-notes.php?action=edit+37786 Delete -- http://master.php.net/manage/user-notes.php?action=delete+37786&report=yes Reject -- http://master.php.net/manage/user-notes.php?action=reject+37786&report=yes Search -- http://master.php.net/manage/user-notes.php