php 模仿蜘蛛抓取内容并分析

header("Content-Type:text/html;charset=gbk");
$message=$_POST['message'];
$contents = @file_get_contents("$message");
if($contents=="Forbidden"){
 $ch = curl_init();
 $timeout = 5;
 curl_setopt ($ch, CURLOPT_URL, "$message");
 curl_setopt ($ch, CURLOPT_RETURNTRANSFER, 1);
 curl_setopt ($ch, CURLOPT_USERAGENT, "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1)");
 curl_setopt ($ch, CURLOPT_CONNECTTIMEOUT, $timeout);
 $contents = curl_exec($ch);
 curl_close($ch);
}
preg_match_all("//is",$contents,$title);
preg_match_all("//is",$contents,$meta);
preg_match_all("//is",$contents,$body);
echo 'title：'.strip_tags($title[0][0]).'

';
for($i=0;$i  if(preg_match("/keywords/i",$meta[0][$i])){
  preg_match_all("/content="(.*?)"/is",$meta[0][$i],$keywords);

 }
 if(preg_match("/description/i",$meta[0][$i])){
  preg_match_all("/content="(.*?)"/is",$meta[0][$i],$description);

 }
}
echo 'keywords：'.strip_tags($keywords[1][0]).'

';
echo 'description：'.strip_tags($description[1][0]).'

';
echo 'body：'.strip_tags($body[0][0]);
?>