goldvision.com - PHP / ip2long

Description

int ip2long ( string ip_address)

The function ip2long() generates an IPv4 Internet network address from its Internet standard format (dotted string) representation.
Example 1. ip2long() Example
<?php $ip = gethostbyname("www.php.net"); $out = "The following URLs are equivalent:<br>\n"; $out .= "http://www.php.net/, http://".$ip."/, and http://".sprintf("%u",ip2long($ip))."/<br>\n"; echo $out; ?>

Note: Because PHP's integer type is signed, and many IP addresses will result in negative integers, you need to use the "%u" formatter of sprintf() or printf() to get the string representation of the unsigned IP address.

This second example shows how to print a converted address with the printf() function :

Example 2. Displaying an IP address

<?php
$ip = gethostbyname("www.php.net");
printf("%u\n", ip2long($ip));
echo $out;
?>