ip2long
(PHP 4, PHP 5, PHP 7)
ip2long — Converts a string containing an (IPv4) Internet Protocol dotted address into a long integer
Description
$ip_address
) : intThe function ip2long() generates an long integer representation of IPv4 Internet network address from its Internet standard format (dotted string) representation.
ip2long() will also work with non-complete IP addresses. Read » http://publibn.boulder.ibm.com/doc_link/en_US/a_doc_lib/libs/commtrf2/inet_addr.htm for more info.
Changelog
| Version | Description |
|---|---|
| 5.5.0 | Prior to this version, on Windows ip2long() would sometimes return a valid number even if passed a value which was not an (IPv4) Internet Protocol dotted address. |
| 5.2.10 | Prior to this version, ip2long() would sometimes return a valid number even if passed a value which was not an (IPv4) Internet Protocol dotted address. |
Examples
Example #1 ip2long() Example
<?php
$ip = gethostbyname('www.example.com');
$out = "The following URLs are equivalent:<br />\n";
$out .= 'http://www.example.com/, http://' . $ip . '/, and http://' . sprintf("%u", ip2long($ip)) . "/<br />\n";
echo $out;
?>
Example #2 Displaying an IP address
This second example shows how to print a converted address with the printf() function:
<?php
$ip = gethostbyname('www.example.com');
$long = ip2long($ip);
if ($long == -1 || $long === FALSE) {
echo 'Invalid IP, please try again';
} else {
echo $ip . "\n"; // 192.0.34.166
echo $long . "\n"; // 3221234342 (-1073732954 on 32-bit systems, due to integer overflow)
printf("%u\n", ip2long($ip)); // 3221234342
}
?>
Notes
Note:
Because PHP's integer type is signed, and many IP addresses will result in negative integers on 32-bit architectures, you need to use the "%u" formatter of sprintf() or printf() to get the string representation of the unsigned IP address.
Note:
ip2long() will return
FALSEfor the IP 255.255.255.255 in PHP 5 <= 5.0.2, and -1 on 64-bits systems in PHP 5 <=5.2.4. It was fixed in PHP 5.2.5 where it returns 4294967295. 32-bit systems will return -1 due to the integer value overflowing.
English translation
You have asked to visit this site in English. For now, only the interface is translated, but not all the content yet.If you want to help me in translations, your contribution is welcome. All you need to do is register on the site, and send me a message asking me to add you to the group of translators, which will give you the opportunity to translate the pages you want. A link at the bottom of each translated page indicates that you are the translator, and has a link to your profile.
Thank you in advance.
Document created the 30/01/2003, last modified the 26/10/2018
Source of the printed document:https://www.gaudry.be/en/php-rf-function.ip2long.html
The infobrol is a personal site whose content is my sole responsibility. The text is available under CreativeCommons license (BY-NC-SA). More info on the terms of use and the author.
References
These references and links indicate documents consulted during the writing of this page, or which may provide additional information, but the authors of these sources can not be held responsible for the content of this page.
The author This site is solely responsible for the way in which the various concepts, and the freedoms that are taken with the reference works, are presented here. Remember that you must cross multiple source information to reduce the risk of errors.
