php域名匹配正则表达式代码

$com = 'www.111cn.net';

echo matchdomain($com);

//www.111cn.net

$cn = 'afdsafs';

echo matchdomain($cn);

$hostname = gethostbyaddr($_server['remote_addr']);

echo $hostname;

function grabimage($url,$filename="") {
  if($url==""):return false;endif;

  if($filename=="") {
    $ext=strrchr($url,".");
    if($ext!=".gif" && $ext!=".jpg"):return false;endif;
    $filename=date("dmyhis").$ext;
  }

  ob_start();
  readfile($url);
  $img = ob_get_contents();
  ob_end_clean();
  $size = strlen($img);

  $fp2=@fopen($filename, "a");
  fwrite($fp2,$img);
  fclose($fp2);

  return $filename;
}

$ch = curl_init();
curl_setopt($ch, curlopt_url, $url);//这是目标地址
curl_setopt($ch, curlopt_header, 0);
curl_setopt($ch, curlopt_returntransfer, 1);
curl_setopt($ch, curlopt_referer,   $referer);//这里伪造
$data = curl_exec($ch);
curl_close($ch);
echo $data;

<script language="网页特效">
function getsource(pageindex,pagesize,divid)
{
   if(typeof(pageindex) == "undefined" || typeof(pagesize) == "undifined")
   {
       pageindex = 0;
       pagesize = 5;
   }
   var url = "getlist.php?pageindex="+pageindex+"&pagesize="+pagesize;
   var divs = document.getelementbyid(divid);
   var ajax = initajax();
   ajax.open("get",url,true);
   ajax.onreadystatechange = function()
   {
    if(ajax.readystate == 4)
    {
        divs.innerhtml = ajax.responsetext;
    }
   }
   ajax.send(null);
}

</script>

function matchip($q){
preg_match('/((25[0-5])|(2[0-4]d)|(1dd)|([1-9]d)|d)(.((25[0-5])|(2[0-4]d)|(1dd)|([1-9]d)|d)){3}/', $q, $matches);
return $matches[0];
}

$ipaddress = '201.103.2.2';
$iperror ='262.3.6.6';