PHP function ip2long() implements a solution to the problem of negative numbers when converting IP to integer

$ip = "192.168.1.2";
$ip_n = ip2long($ip);
echo $ip_n; //Get -1062731518
?>

Reason: The integer value converted by IP is too large and exceeds the range of the integer, so it becomes a negative number.

You need to make the following modifications, modify it to $ip_n = bindec(decbin(ip2long($ip))) to get the unsigned integer.

For example:

$ip = "192.168.1.2";
$ip_n = bindec(decbin(ip2long($ip)));
//by bbs.it-home.org
echo $ ip_n; //Get 3232235778
?>