IP to ASN lookup PHP

ipToAsnLookup.php

    private function getAsnFromIP($ip)
    {
        $query = 'whois -h whois.cymru.com " -f ' . (string) $ip . '"';
        $whoisResult = shell_exec($query);
        $asnArray = explode('|', $whoisResult);
        $cleanAsn = array_map('trim', $asnArray);
        return $cleanAsn;
    }

function ip2asn($ip)
{
    return trim(shell_exec("whois -h whois.cymru.com $ip|sed 1,1d|cut -d '|' -f 1"));
}

$asn = ip2asn($_SERVER['REMOTE_ADDR']);

# 16247 https://ipinfo.io/AS16247
# 9009 https://ipinfo.io/AS9009

$bad_asn = array("16247", "9009");

if(in_array($asn, $bad_asn)){
    http_response_code(404);
    exit();
}

https://www.php.net/manual/en/function.geoip-asnum-by-name.php :)

@victorelec14 You'll need to install PECL geoip >= 1.1.0.