Description
int
ip2long ( string
ip_address)
The function ip2long() generates
an IPv4 Internet network address from its Internet standard
format (dotted string) representation.
範例 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;
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注: 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 :
範例 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()