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apphp-snippets on 05/22/17

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WhoIs Query in PHP

/ Published in: PHP

This code allows to perform a query to WhoIs service in PHP.

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<?php           
function whois_query($domain) {
    // fix the domain name: $domain = strtolower(trim($domain));
    $domain = preg_replace('/^http:\/\//i', '', $domain);
    $domain = preg_replace('/^www\./i', '', $domain);
    $domain = explode('/', $domain);
    $domain = trim($domain[0]);
    // split the TLD from domain name
    $_domain = explode('.', $domain);
    $lst = count($_domain)-1;
    $ext = $_domain[$lst];
    // You find resources and lists
    // like these on wikipedia:
    //
    // de.wikipedia.org/wiki/Whois
    //
    $servers = array(
        "biz" => "whois.neulevel.biz",
        "com" => "whois.internic.net", "us" => "whois.nic.us",
        "coop" => "whois.nic.coop", "info" => "whois.nic.info",
        "name" => "whois.nic.name", "net" => "whois.internic.net",
        "gov" => "whois.nic.gov", "edu" => "whois.internic.net",
        "mil" => "rs.internic.net", "int" => "whois.iana.org",
        "ac" => "whois.nic.ac", "ae" => "whois.uaenic.ae",
        "at" => "whois.ripe.net", "au" => "whois.aunic.net",
        "be" => "whois.dns.be", "bg" => "whois.ripe.net",
        "br" => "whois.registro.br", "bz" => "whois.belizenic.bz",
        "ca" => "whois.cira.ca", "cc" => "whois.nic.cc",
        "ch" => "whois.nic.ch", "cl" => "whois.nic.cl",
        "cn" => "whois.cnnic.net.cn", "cz" => "whois.nic.cz",
        "de" => "whois.nic.de", "fr" => "whois.nic.fr",
        "hu" => "whois.nic.hu", "ie" => "whois.domainregistry.ie",
        "il" => "whois.isoc.org.il", "in" => "whois.ncst.ernet.in",
        "ir" => "whois.nic.ir", "mc" => "whois.ripe.net",
        "to" => "whois.tonic.to", "tv" => "whois.tv",
        "ru" => "whois.ripn.net", "org" => "whois.pir.org",
        "aero" => "whois.information.aero", "nl" => "whois.domain-registry.nl"
    );
        
    if (!isset($servers[$ext])){ die('Error: No matching nic server found!'); }
    $nic_server = $servers[$ext];
    $output = '';
    
    // connect to whois server:
    if ($conn = fsockopen ($nic_server, 43)) {
        fputs($conn, $domain."\r\n");
        while(!feof($conn)) {
            $output .= fgets($conn,128);
        }
        fclose($conn);
    }
    else {
        die('Error: Could not connect to ' . $nic_server . '!');
    }
    return $output;
}
?>

URL: www.apphp.com/index.php?snippet=php-whois-query

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