note 56373 added to function.ip2long

Below is a merged form of all various notes, and a better (and correct) network matching function. <?php function net_match($network, $ip) { // determines if a network in the form of 192.168.17.1/16 or // 127.0.0.1/255.255.255.255 or 10.0.0.1 matches a given ip $ip_arr = explode('/', $network); $network_long = ip2long($ip_arr[0]); $x = ip2long($ip_arr[1]); $mask = long2ip($x) == $ip_arr[1] ? $x : 0xffffffff << (32 - $ip_arr[1]); $ip_long = ip2long($ip); // echo ">".$ip_arr[1]."> ".decbin($mask)."\n"; return ($ip_long & $mask) == ($network_long & $mask); } echo net_match('192.168.17.1/16', '192.168.15.1')."\n"; // returns true echo net_match('127.0.0.1/255.255.255.255', '127.0.0.2')."\n"; // returns false echo net_match('10.0.0.1', '10.0.0.1')."\n"; // returns true ?> ---- Manual Page -- http://www.php.net/manual/en/function.ip2long.php Edit -- http://master.php.net/manage/user-notes.php?action=edit+56373 Delete: added to the manual -- http://master.php.net/manage/user-notes.php?action=delete+56373&report=yes&reason=added+to+the+manual Delete: bad code -- http://master.php.net/manage/user-notes.php?action=delete+56373&report=yes&reason=bad+code Delete: spam -- http://master.php.net/manage/user-notes.php?action=delete+56373&report=yes&reason=spam Delete: useless -- http://master.php.net/manage/user-notes.php?action=delete+56373&report=yes&reason=useless Delete: non-english -- http://master.php.net/manage/user-notes.php?action=delete+56373&report=yes&reason=non-english Delete: other reasons -- http://master.php.net/manage/user-notes.php?action=delete+56373&report=yes Reject -- http://master.php.net/manage/user-notes.php?action=reject+56373&report=yes Search -- http://master.php.net/manage/user-notes.php