IPV4的地址，我们可以通过ip2long将IP地址转换为INT类型，通过long2ip函数将INT转换为IP地址
$ip = $_SERVER['REMOTE_ADDR'];
$ipnum = ip2long($ip);
echo $ipnum;

IPV6不用使用ip2long函数，使用下面方便处理
1、将php.ini文件中php_gmp.dll扩展打开之后重启服务
2、IPV6转换为INT函数

function ip2long_v6($ipv6) {
$ip_n = inet_pton($ipv6);
$bits = 15; // 16 x 8 bit = 128bit
$ipv6long='';
while ($bits >= 0) {
        $bin = sprintf("%08b",(ord($ip_n[$bits])));
        $ipv6long = $bin.$ipv6long;
        $bits--;
}
return  gmp_strval(gmp_init($ipv6long,2),10); 
}

2、把转的数字反转义成ip

function long2ip_v6($dec) {
    if (function_exists('gmp_init')) {
        $bin = gmp_strval(gmp_init($dec, 10), 2);
    } elseif (function_exists('bcadd')) {
        $bin = '';
        do {
            $bin = bcmod($dec, '2') . $bin;
            $dec = bcdiv($dec, '2', 0);
        } while (bccomp($dec, '0'));
    } else {
        trigger_error('GMP or BCMATH extension not installed!', E_USER_ERROR);
    }
 
    $bin = str_pad($bin, 128, '0', STR_PAD_LEFT);
    $ip = array();
    for ($bit = 0; $bit <= 7; $bit++) {
        $bin_part = substr($bin, $bit * 16, 16);
        $ip[] = dechex(bindec($bin_part));
    }
    $ip = implode(':', $ip);
    return inet_ntop(inet_pton($ip));
}