phpCURL采集有关问题-

      $url){
        $conn[$k]=curl_init($url);
        curl_setopt($conn[$k], CURLOPT_TIMEOUT, $timeout);//设置超时时间
        curl_setopt($conn[$k], CURLOPT_USERAGENT, 'Mozilla/5.0 (compatible; MSIE 5.01; Windows NT 5.0)');
        curl_setopt($conn[$k], CURLOPT_MAXREDIRS, 7);//HTTp定向级别
        curl_setopt($conn[$k], CURLOPT_HEADER, 0);//这里不要header，加块效率
        curl_setopt($conn[$k], CURLOPT_FOLLOWLOCATION, 1); // 302 redirect
        curl_setopt($conn[$k],CURLOPT_RETURNTRANSFER,1);
        curl_multi_add_handle ($mh,$conn[$k]);
    }
     //防止死循环耗死cpu 这段是根据网上的写法
        do {
            $mrc = curl_multi_exec($mh,$active);//当无数据，active=true
        } while ($mrc == CURLM_CALL_MULTI_PERFORM);//当正在接受数据时
        while ($active and $mrc == CURLM_OK) {//当无数据时或请求暂停时，active=true
            if (curl_multi_select($mh) != -1) {
                do {
                    $mrc = curl_multi_exec($mh, $active);
                } while ($mrc == CURLM_CALL_MULTI_PERFORM);
            }
        }
    foreach ($array as $k => $url) {
          curl_error($conn[$k]);
          $res[$k]=curl_multi_getcontent($conn[$k]);//获得返回信息
          $header[$k]=curl_getinfo($conn[$k]);//返回头信息
          curl_close($conn[$k]);//关闭语柄
          curl_multi_remove_handle($mh  , $conn[$k]);   //释放资源 
        }

         
        curl_multi_close($mh);
        $endtime = getmicrotime();
        $diff_time = $endtime - $startime;

        return array('diff_time'=>$diff_time,
               'return'=>$res,
                'header'=>$header       
 );
}
 //计算当前时间
 function getmicrotime() {
list($usec, $sec) = explode(" ",microtime());
        return ((float)$usec + (float)$sec);
}

    //测试一下，curl 1个网址
$array = array(
"http://www.120ask.com/keshi.asp?c=69&a=&l=0&p=1",
);
 $data = Curl_http($array,'1');//调用
 var_dump($data);//

array(3) { ["diff_time"]=> float(1.0497448444366) ["return"]=> array(1) { [0]=> NULL } ["header"]=> array(1) { [0]=> array(20) { ["url"]=> string(47) "http://www.120ask.com/keshi.asp?c=69&a=&l=0&p=1" ["content_type"]=> NULL ["http_code"]=> int(0) ["header_size"]=> int(0) ["request_size"]=> int(0) ["filetime"]=> int(-1) ["ssl_verify_result"]=> int(0) ["redirect_count"]=> int(0) ["total_time"]=> float(1) ["namelookup_time"]=> float(1) ["connect_time"]=> float(0) ["pretransfer_time"]=> float(0) ["size_upload"]=> float(0) ["size_download"]=> float(0) ["speed_download"]=> float(0) ["speed_upload"]=> float(0) ["download_content_length"]=> float(-1) ["upload_content_length"]=> float(-1) ["starttransfer_time"]=> float(0) ["redirect_time"]=> float(0) } } }