【www.gdgbn.com--网络相关】

php ,模拟,搜索引擎,访问网页时是否带有一些相关参数下面我们就来模仿搜索引擎访问网站吧。

function GetPage($url)
{
$buf=parse_url($url);
if($buf["scheme"]=="http")//如果是URL
 {
 $host=$buf["host"];
 $page=$buf["path"];
 if(trim($buf["query"])!=="") $page.="?".trim($buf["query"]);

 $myHeader="GET $url HTTP/1.1rn";
 $myHeader.="Host: $hostrn";
 $myHeader.="Connection: closern";
 $myHeader.="Accept: text/xml,application/xml,application/xhtml+xml,text/html;q=0.9,text/plain;q=0.8,image/png,*/*;q=0.5rn";
 $myHeader.="Accept-Language: zh-cn,zh;q=0.5rn";
 $myHeader.="Accept-Charset: gb2312,utf-8;q=0.7,*;q=0.7rn";
 $myHeader.="User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; zh-CN; rv:1.7.6) Gecko/20050226 Firefox/1.0.1 Web-Sniffer/1.0.20rn";
 $myHeader.="Referer: http://$host/rnrn";

 $server=$host;
 $port=80;

 $res="";
 if(false!==($fp = @fsockopen ($server, $port, $errno, $errstr, 30)))
  {
  @fputs ($fp, $myHeader);
  while (!@feof($fp)) $res.= @fgets ($fp, 1024);
  @fclose ($fp);
  }
 else return false;

 if(strlen($res)==0) return false;
 
 return $res;
 }
else//如果是本地文件
 {
 $fileName=$url;
 if(false!==@file_exists($fileName))
  {
  if(false!==($buf=@implode("",file($fileName)))&&@strlen($buf)>0)
   {
      
    return $buf;
   }
  else return false;
  }
 else return false;
 }
}


function  GetContent($str,$x,$y){ 
 $tem=strstr($str,$x);
 return substr($tem,0, strpos($tem,$y));
}


?>

本文来源:http://www.gdgbn.com/jiaocheng/19839/