note 93501 added to function.inet-pton

If the input string is not a readable IP address, inet_pton() generates an E_WARNING and returns FALSE. The same is true for inet_ntop(). Also, inet_pton() does not recognize netmask notation (e.g: "1.2.3.4/24" or "1:2::3:4/64") in the input string. This differs from how some database systems (like postgreSQL) support IP address types, so if you need that sort of functionality when processing IP addresses in PHP you'll have to write it in yourself. A rough example: <?php // Sample IP addresses $ipaddr = '1.2.3.4/24'; // IPv4 with /24 netmask $ipaddr = '1:2::3:4/64'; // IPv6 with /64 netmask // Strip out the netmask, if there is one. $cx = strpos($ipaddr, '/'); if ($cx) { $subnet = (int)(substr($ipaddr, $cx+1)); $ipaddr = substr($ipaddr, 0, $cx); } else $subnet = null; // No netmask present // Convert address to packed format $addr = inet_pton($ipaddr); // Let's display it as hexadecimal format foreach(str_split($addr) as $char) echo str_pad(dechex(ord($char)), 2, '0', STR_PAD_LEFT); echo "<br />\n"; // Convert the netmask if (is_integer($subnet)) { // Maximum netmask length = same as packed address $len = 8*strlen($addr); if ($subnet > $len) $subnet = $len; // Create a hex expression of the subnet mask $mask = str_repeat('f', $subnet>>2); switch($subnet & 3) { case 3: $mask .= 'e'; break; case 2: $mask .= 'c'; break; case 1: $mask .= '8'; break; } $mask = str_pad($mask, $len>>2, '0'); // Packed representation of netmask $mask = pack('H*', $mask); } // Display the netmask as hexadecimal foreach(str_split($mask) as $char) echo str_pad(dechex(ord($char)), 2, '0', STR_PAD_LEFT); ?> ---- Server IP: 64.71.164.2 Probable Submitter: 67.237.228.46 ---- Manual Page -- http://www.php.net/manual/en/function.inet-pton.php Edit -- https://master.php.net/note/edit/93501 Del: integrated -- https://master.php.net/note/delete/93501/integrated Del: useless -- https://master.php.net/note/delete/93501/useless Del: bad code -- https://master.php.net/note/delete/93501/bad+code Del: spam -- https://master.php.net/note/delete/93501/spam Del: non-english -- https://master.php.net/note/delete/93501/non-english Del: in docs -- https://master.php.net/note/delete/93501/in+docs Del: other reasons-- https://master.php.net/note/delete/93501 Reject -- https://master.php.net/note/reject/93501 Search -- https://master.php.net/manage/user-notes.php