(PHP 4 >= 4.0.0)
ip2long -- Converts a string containing an (IPv4) Internet Protocol dotted address into
a proper address.
Description
int ip2long (string ip_address)
The function ip2long() generates an IPv4 Internet network address from its Internet
standard format (dotted string) representation.
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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;
?>
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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 :
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Example 2. Displaying an IP address
<?php
$ip = gethostbyname("www.php.net");
printf("%u\n", ip2long($ip));
echo $out;
?>
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See also: long2ip()
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