Получение реального ip адреса посетителя при использовании CloudFlare

<?php
$cfIpRanges = [
    '199.27.128.0/21',
    '173.245.48.0/20',
    '103.21.244.0/22',
    '103.22.200.0/22',
    '103.31.4.0/22',
    '141.101.64.0/18',
    '108.162.192.0/18',
    '190.93.240.0/20',
    '188.114.96.0/20',
    '197.234.240.0/22',
    '198.41.128.0/17',
    '162.158.0.0/15',
    '104.16.0.0/12',
];

$cidr_match = function ($ip, $range) {
    list ($subnet, $bits) = explode('/', $range);
    $ip = ip2long($ip);
    $subnet = ip2long($subnet);
    $mask = -1 << (32 - $bits);
    $subnet &= $mask;
    return ($ip & $mask) == $subnet;
};

if (isset($_SERVER['HTTP_CF_CONNECTING_IP'])) {
    foreach ($cfIpRanges as $cfIpRange) {
        if ($cidr_match($_SERVER['REMOTE_ADDR'], $cfIpRange)) {
            $_SERVER['REMOTE_ADDR'] = $_SERVER['HTTP_CF_CONNECTING_IP'];
            break;
        }
    }
}
?>