Whois

function whois ($a_server, $a_query, $a_port=43) {
    $available = "No match";
    $a_query = str_replace("www.", "", $a_query);
    $a_query = str_replace("http://", "", $a_query);
    
    //connects to whois to search for username
    $sock = fsockopen($a_server,$a_port);
    if(!$sock) {
        echo 'Could Not Connect To Server.';
    }
    
    //write the query to whois
    fputs($sock,"$a_query\r\n");
    //get the line of results
    while(!feof($sock)) $result .= fgets($sock,128);
    //close the connection

    fclose($sock);
    
    if (eregi($available,$result)) {
        echo $a_query . ' is available.';
    } else {
        echo $a_query . ' is not available.</b></font>';
    }

}

if($query != ''){
    if(!eregi(".com",$query) AND !eregi(".net",$query) AND !eregi(".org",$query)) {
        echo 'You must specify a .com, .net, or .org domain name.';
    } else {
        $server = 'whois.internic.net';
        whois($server,$query);
    }
} elseif(isset($query)) {
    echo 'Please fill in a domain name and try again.';
}