用PHP查询域名状态whois的类

<? 
class SearchDomain 
{ 
 var $domain=""; 
 function SetDomain($udomain) 
 { 
 $this->domain = $udomain; 
 } 
 // 
 // 获取whois并分析域名状态 
 // ok 未被注册 
 // 非空值 过期时间 
 // 空值 未知 
 // 
 function GetInfo() 
 { 
 /* 
 $dinfo = trim($this->GetWhois()); 
 if($dinfo=="") return ""; 
 if(eregi("no match",$dinfo)) return "ok"; 
 //return $rs; 
 */ 
 $wl = ""; 
 $w_server = $this->GetServer(); 
 if($w_server=="") return ""; 
 $fp = fsockopen($w_server, 43, $errno, $errstr, 30); 
 if(!$fp) 
 { 
 echo $errstr; 
 return ""; 
 } 
 $out = $this->domain."\r\n"; 
 $out .= "Connection: Close\r\n\r\n"; 
 fputs($fp, $out); 
 while (!feof($fp)) 
 { 
 $wl = fgets($fp, 255); 
 if(eregi("no match",$wl)) 
 { 
 fclose($fp); 
 return "ok"; 
 } 
 if(eregi("Expiration Date",$wl)) 
 { 
 $lines = split(":",$wl); 
 $t = trim($lines[1]); 
 $ts = split(" ",$t); 
 $t = $ts[0]; 
 if(ereg("[^0-9-]",$t)) 
 { 
 $ts = split("-",$t); 
 $t = $ts[2]."-".$this->MonthToNum($ts[1])."-".$ts[0]; 
 } 
 fclose($fp); 
 return $t; 
 } 
 } 
 fclose($fp); 
 return ""; 
 } 
 // 
 //获得域名的整个whois信息 
 // 
 function GetWhois() 
 { 
 $wh = ""; 
 $w_server = $this->GetServer(); 
 if($w_server=="") return ""; 
 $fp = fsockopen($w_server, 43, $errno, $errstr, 30); 
 if(!$fp) 
 { 
 echo $errstr; 
 return ""; 
 } 
 $out = $this->domain."\r\n"; 
 $out .= "Connection: Close\r\n\r\n"; 
 fputs($fp, $out); 
 while (!feof($fp)) 
 { 
 $wh .= nl2br(fgets($fp, 255)); 
 } 
 fclose($fp); 
 return $wh; 
 } 
 // 
 //输出当前域名的状态信息 
 // 
 function PrintSta() 
 { 
 $rs = $this->GetInfo(); 
 if($rs=="ok") echo $this->domain." 未注册！<br/>\r\n"; 
 else if($rs=="") echo "无法查询 ".$this->domain." 状态！<br/>\r\n"; 
 else echo $this->domain." 已注册，到期时间：$rs<br/>\r\n"; 
 } 
 // 
 //获得 whois 查询服务器 
 // 
 function GetServer() 
 { 
 $udomain=substr($this->domain,-3); 
 switch($udomain) 
 { 
 case "com": 
 $w_server="whois.internic.net"; 
 break; 
 case "net": 
 $w_server="whois.internic.net"; 
 break; 
 case "org": 
 $w_server="whois.pir.org"; 
 break; 
 case "nfo": 
 $w_server="whois.afilias.info"; 
 break; 
 case "biz": 
 $w_server="whois.biz"; 
 break; 
 case ".cc": 
 $w_server="whois.nic.cc"; 
 break; 
 case "edu": 
 $w_server="whois.educause.net"; 
 break; 
 case "gov": 
 $w_server="whois.nic.gov"; 
 break; 
 case ".cn": 
 $w_server="whois.cnnic.net.cn"; 
 break; 
 default: 
 $w_server=""; 
 } 
 return $w_server; 
 } 
 // 
 //英语的月份转为数字 
 // 
 function MonthToNum($m) 
 { 
 $m = strtolower($m); 
 for($i=1;$i<=12;$i++) 
 { 
 $tt = mktime(0,0,0,$i+1,0,2005); 
 if($m==strtolower(strftime("%b",$tt))) 
 { 
 if($i>9) return $i-1; 
 else return "0".$i-1; 
 } 
 } 
 } 
} 

$sd = new SearchDomain(); 
$sd->SetDomain("job-sky.com"); 

//查询域名是否被注册，等价于 $sd->PrintSta();  
$rs = $sd->GetInfo(); 
if($rs=="ok") echo $sd->domain." 未注册！<br/>\r\n"; 
else if($rs=="") echo "无法查询 ".$sd->domain." 状态！<br/>\r\n"; 
else echo $sd->domain." 已注册，到期时间：$rs<br/>\r\n"; 

//获得域名的详细whois信息 
//echo $sd->GetWhois(); 
?>