PHP 检查Whois的实现方法

PHP检查Whois的方法，感兴趣的小伙伴，下面一起跟随脚本之家 jb51.cc的小编来看看吧。
经测试代码如下：

/**
 * 检查Whois
 *
 * @param 
 * @author 脚本之家 jb51.cc jb51.cc
 **/
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:
    //
    //
    $servers = array(
        "biz" => "whois.neulevel.biz","com" => "whois.internic.net","us" => "whois.nic.us","coop" => "whois.nic.coop","info" => "whois.nic.info","name" => "whois.nic.name","net" => "whois.internic.net","gov" => "whois.nic.gov","edu" => "whois.internic.net","mil" => "rs.internic.net","int" => "whois.iana.org","ac" => "whois.nic.ac","ae" => "whois.uaenic.ae","at" => "whois.ripe.net","au" => "whois.aunic.net","be" => "whois.dns.be","bg" => "whois.ripe.net","br" => "whois.registro.br","bz" => "whois.belizenic.bz","ca" => "whois.cira.ca","cc" => "whois.nic.cc","ch" => "whois.nic.ch","cl" => "whois.nic.cl","cn" => "whois.cnnic.net.cn","cz" => "whois.nic.cz","de" => "whois.nic.de","fr" => "whois.nic.fr","hu" => "whois.nic.hu","ie" => "whois.domainregistry.ie","il" => "whois.isoc.org.il","in" => "whois.ncst.ernet.in","ir" => "whois.nic.ir","mc" => "whois.ripe.net","to" => "whois.tonic.to","tv" => "whois.tv","ru" => "whois.ripn.net","org" => "whois.pir.org","aero" => "whois.information.aero","nl" => "whois.domain-registry.nl"
    );
    if (!isset($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,$domain."rn");
        while(!feof($conn)) {
            $output .= fgets($conn,128);
        }
        fclose($conn);
    }
    else { die('Error: Could not connect to ' . $nic_server . '!'); }
    return $output;
}

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