(PHP 4, PHP 5, PHP 7, PHP 8)
long2ip — Convertit une adresse entier long (IPv4) en sa notation décimale à point
La fonction long2ip() génère une adresse Internet en notation décimale à point (format aaa.bbb.ccc.ddd) à partir de sa représentation entier long.
ipUne propre représentation d'une adresse sous forme entier long
Retourne l'adresse IP Internet, sous la forme d'une chaîne de caractères, ou false si une erreur survient.
Note:
Sur les architectures 32-bits, transtyper la représention d'adresses IP de string à int ne donnera pas de résultats correct pour les nombres qui dépassent
PHP_INT_MAX.
For a 32bit safe long2ip, which can accept string or signed integer input, try:
function safelong2ip($long) {
$binStr = sprintf("%032s", decbin((float)$long));
if (strlen($binStr) != 32) {
throw new Exception("Invalid IPv4 subnet!");
}
$ipArr = [];
for ($i = 0; $i < 4; ++$i) {
$ipArr[] = bindec(substr($binStr, $i*8, 8));
}
return implode('.', $ipArr);
}If the function doesn't exist:
<?
if (!function_exists("long2ip")) {
function long2ip($long) {
// Valid range: 0.0.0.0 -> 255.255.255.255
if ($long < 0 || $long > 4294967295) return false;
$ip = "";
for ($i=3;$i>=0;$i--) {
$ip .= (int)($long / pow(256,$i));
$long -= (int)($long / pow(256,$i))*pow(256,$i);
if ($i>0) $ip .= ".";
}
return $ip;
}
}
?>I wanted to be able to pass an IP address in a URL always as an unsigned int. I then converted it back as shown below:
$ip_addr = "192.168.100.25"; // example IP address that converts to neg #
$s32int = ip2long($ip_addr);
$us32str = sprintf("%u",$s32int); // convert to unsigned string
// display orig IP address, signed 32 bit version, unsigned 32 bit ver,
// finally converted back to IP addr
printf("%s ,%d, %s, %s", $ip_addr, $s32int, $us32str,
long2ip(-(4294967296-$us32str)));
// tested on Linux/Apache PHP 4.1.2an Anonymous wrote several years ago that you should cast the parameter to float to make sure that you get the right result on 32-bit machines. That probably never worked.
But the idea is on a good track: to convert a bitstring into an ip, use
$ip = long2ip((int)bindec($bits));
This works on 32- and 64-bit machines.Use these two functions to convert from and to numbers compatible to MySQLs INET_ATON and INET_NTOA
<?php
function convertIpToString($ip)
{
$long = 4294967295 - ($ip - 1);
return long2ip(-$long);
}
function convertIpToLong($ip)
{
return sprintf("%u", ip2long($ip));
}
?>