PHP gets the MAC address of the network card and the code of the main domain in the URL

//获取网卡MAC地址
@exec("ipconfig/all",$array);
for($Tmpa;$Tmpaif(eregi("Physical",$array[$Tmpa])){
   $mac=explode(":",$array[$Tmpa]);
   echo $mac[1];
}
}
//获取url主域
//by http://bbs.it-home.org
function GetDomain($url){
$pattern = "/[w-]+.(com|net|org|gov|cc|biz|info|cn)(.(cn|hk))*/";
preg_match($pattern, $url, $matches);
if(count($matches) > 0){
   return $matches[0];
}else{
   $rs = parse_url($url);
   $main_url = $rs["host"];
   if(!strcmp(long2ip(sprintf("%u",ip2long($main_url))),$main_url)) {
    return $main_url;
   }else{
    $arr = explode(".",$main_url);
    $count=count($arr);
    $endArr = array("com","net","org","3322");//com.cn net.cn 等情况
    if(in_array($arr[$count-2],$endArr)){
     $domain = $arr[$count-3].".".$arr[$count-2].".".$arr[$count-1];
    }else{
     $domain = $arr[$count-2].".".$arr[$count-1];
    }
    return $domain;
   }//end if(strcmp)
}//end if(count)
}//end fun
?>