(PHP 4 )
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.
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;
?> |
|
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
$ip = gethostbyname("www.example.com");
printf("%u\n", ip2long($ip));
echo $out;
?> |
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See also: long2ip()