fsockopen 抓取网页内容

fsockopen 抓取网页内容：

function get_page_content($url){
$url = eregi_replace('^http://', '', $url);
$temp = explode('/', $url);
$host = array_shift($temp);
$path = '/'.implode('/', $temp);
$temp = explode(':', $host);
$host = $temp[0];
$port = isset($temp[1]) ? $temp[1] : 80;
$fp = @fsockopen($host, $port, &$errno, &$errstr, 30);
if ($fp){
@fputs($fp, "GET $path HTTP/1.1/r/nHost: $host/r/nAccept: */*/r/nReferer:$url/r/nUser-Agent: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1)/r/nConnection: Close/r/n/r/n");
}
$Content = '';
while ($str = @fread($fp, 4096)){
$Content .= $str;
}
@fclose($fp);
//重定向
if(preg_match("/^HTTP///d./d 301 Moved Permanently/is",$Content)){
if(preg_match("/Location:(.*?)/r/n/is",$Content,$murl)){
return get_page_content($murl[1]);
}
}
//读取内容
if(preg_match("/^HTTP///d./d 200 OK/is",$Content)){
preg_match("/Content-Type:(.*?)/r/n/is",$Content,$murl);
$contentType=trim($murl[1]);
$Content=explode("/r/n/r/n",$Content,2);
$Content=$Content[1];
}
return $Content;
}

print_r(get_page_content('www.google.cn'));