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(PHP 5 >= 5.1.0)

inet_ptonConvertit une adresse IP lisible en sa représentation in_addr


string inet_pton ( string $address )

Convertit une adresse IPv4 ou IPv6 (si PHP a été compilé avec le support IPv6) humainement lisible en une structure binaire appropriée de famille d'adresses 32 bit ou 128 bit.

Liste de paramètres


Une adresse IPv4 ou IPv6.

Valeurs de retour

Retourne la représentation in_addr de l'adresse fournie par le paramètre address ou FALSE si le paramètre address fourni a une synthaxe invalide (par exemple, une adresse IPv4 sans point, ou une adresse IPv6 sans virgule).


Exemple #1 Exemple avec inet_pton()


$in6_addr inet_pton('::1');


Version Description
5.3.0 Cette fonction est maintenant disponible sur les plate-formes Windows.

Voir aussi

  • ip2long() - Convertit une chaîne contenant une adresse (IPv4) IP numérique en adresse littérale
  • long2ip() - Convertit une adresse IP (IPv4) en adresse IP numérique
  • inet_ntop() - Convertit un paquet d'adresses internet en une représentation humainement lisible

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User Contributed Notes 5 notes

strata_ranger at hotmail dot com
5 years ago
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: "" 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:


// Sample IP addresses
$ipaddr = ''; // 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 (
$subnet = (int)(substr($ipaddr, $cx+1));
$ipaddr = substr($ipaddr, 0, $cx);
$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);
"<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);
$subnet & 3)
3: $mask .= 'e'; break;
2: $mask .= 'c'; break;
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);

me at diogoresende dot net
8 years ago
If you want to use the above function you should test for ':' character before '.'. Meaning, you should check if it's an ipv6 address before checking for ipv4.
Why? IPv6 allows this type of notation:


If you check for '.' character you will think this is an ipv4 address and it will fail.
3 months ago
Be careful, address with leading 0 return false.

Example :
(''); // return false
inet_pton('') ;// return the good result
eric at vyncke org
7 years ago
Not so easy in the function below... It is not handling the case of '::' which can happen in an IPv6 and represents any number of 0, addresses could be as simple as ff05::1
francis dot besset at gmail dot com
3 years ago
It is possible to verify if PHP was compiled with --disable-ipv6 option by AF_INET6 constant.


if (defined('AF_INET6')) {
"PHP was compiled without --disable-ipv6 option";
} else {
"PHP was compiled with --disable-ipv6 option";

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