ip2long
If you're running a 32 bit machine you can get wrong IPs. To prevent from this just cast to float e.g.
<?php
long2Ip32bit($ip){
return long2ip((float)$ip);
}
?>
long2ip
(PHP 4, PHP 5)
long2ip — Converts an (IPv4) Internet network address into a string in Internet standard dotted format
Description
string long2ip
( string
$proper_address
)The function long2ip() generates an Internet address in dotted format (i.e.: aaa.bbb.ccc.ddd) from the proper address representation.
Parameters
-
proper_address -
A proper address representation.
Return Values
Returns the Internet IP address as a string.
See Also
- ip2long() - Converts a string containing an (IPv4) Internet Protocol dotted address into a proper address
add a note
User Contributed Notes
long2ip - [7 notes]
Anonymous ¶
1 year ago
php dot net at davidstockton dot com ¶
4 years ago
Beware when processing values that are invalid, you may get values that are different based on the OS. For instance:
$ip = long2ip(pow(2,32)+1024);
On windows you get 255.255.255.255. On linux it's 0.0.4.0.
So it seems it would be important to make sure the long you're converting is in the correct range.
Gabriel Malca ¶
7 years ago
If the function doesn't exist:
<?
if (!function_exists("long2ip")) {
function long2ip($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;
}
}
?>
Tom Crosley ¶
10 years ago
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 4.1.2
randomize at randomizer dot com ¶
7 years ago
Random ip address! (4294967295 is 255.255.255.255)
long2ip(rand(0, "4294967295"))
klawd at kamundo dot de ¶
1 year ago
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));
}
?>
flobee ¶
8 years ago
when importing ip-ranges to a mysql database using an INT(10) field - NOTE: that you will get problems when using intval() function!
copied from "cleong" : 02-Oct-2001 02:21
intval() handles overflow differently depending on the type of the argument.
<?php
// intval('10000000000') = 2147483647
// intval(1e10) = 1410065408
?>