PHP ip2long() Function

Example

Convert an IPv4 address into a long integer:

<?php
$ip = gethostbyname("www.w3schools.com");
$out = "The following URLs are equivalent:<br>";
$out .= "https://www.w3schools.com/, https://" . $ip . "/, and https://" . sprintf("%u", ip2long($ip)) . "/";
echo $out;
?>

Definition and Usage

The ip2long() function converts an IPv4 address into a long integer.

Syntax

ip2long(address)

Parameter Values

Parameter	Description
address	Required. Specifies a standard IP address

Technical Details

Return Value:	A long integer. FALSE on failure
PHP Version:	4.0+
PHP Changelog:	PHP 5.5: Before this version, on Windows, this function might return a valid number even if the passed value was not an IPv4 address. PHP 5.2: PHP 5.5: Before this version, this function might return a valid number even if the passed value was not an IPv4 address.

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