php 模拟用户抓取网页内容程序...

function _link($url){
 $contents = @file_get_contents("$url");
 if($contents=="Forbidden" || $contents==""){
  $ch = curl_init();
  $timeout = 5;
  curl_setopt ($ch, CURLOPT_URL, "$url");
  curl_setopt ($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($ch);
 }
 if(empty($contents)){
  exit('<font color=red>cant locaion.</font>');
 }
 preg_match_all("/charset=(.*?)>/is",$contents,$cod);
 if(!empty($cod[1][0])){
  if(preg_match("/utf-8/i",$cod[1][0])){
   $contents=iconv("UTF-8","gbk//TRANSLIT",$contents);
  }
 }
 return $contents;
}