header("Content-Type:text/html;charset=utf8");

 /* 先获取两个页面的所有a标签 */

 // 初始化两个简单处理句柄

 $ch1 = curl_init();

 $ch2 = curl_init();

 curl_setopt_array($ch1,array(

     CURLOPT_URL => 'http://www.sina.com.cn',

     CURLOPT_HEADER => 0,

     CURLOPT_RETURNTRANSFER => 1,

 ));

 curl_setopt_array($ch2,array(

     CURLOPT_URL => 'http://www.baidu.com/',

     CURLOPT_HEADER => 0,

     CURLOPT_RETURNTRANSFER => 1,

 ));

 // 初始化批处理句柄，并添加简单处理句柄

 $mh = curl_multi_init();

 curl_multi_add_handle($mh,$ch1);

 curl_multi_add_handle($mh,$ch2);

 // 初始化执行状态

 $state = null;

 // 执行批处理

 do{

     $mc = curl_multi_exec($mh,$state);

 }while($mc == CURLM_CALL_MULTI_PERFORM);

 while($mc == CURLM_OK && $state) {

     while (curl_multi_exec($mh, $state) === CURLM_CALL_MULTI_PERFORM);

     // 经过实验，发现curl_multi_select($mh)总是返回-1，意味着一下代码不会执行

     if(curl_multi_select($mh) != -1) {

         do{

             $mc = curl_multi_exec($mh,$state);

         }while($mc == CURLM_CALL_MULTI_PERFORM);

     }

 }

 // 获取内容

 $text  = curl_multi_getcontent($ch1);

 $text .= curl_multi_getcontent($ch2);

 // 找到页面中所有的a标签,保存到$matches

 $matches = null;

 preg_match_all("/<a.*?href\s*?=\s*?[\'\"](.*?)[\'\"].*?>(.*?)<\/a>/",$text,$matches);

 // 关闭各个句柄

 curl_multi_remove_handle($mh,$ch1);

 curl_multi_remove_handle($mh,$ch2);

 curl_multi_close($mh);

 /*在找到的连接中继续查找title标签 */

 $handle = array(); // 存储简单处理句柄的数组

 $mhandle = curl_multi_init(); //批处理句柄

 // 处理100个页面

 foreach(array_slice($matches[1],0,100) as $href) {

     $tmp_h = curl_init();

     curl_setopt_array($tmp_h,array(

         CURLOPT_URL => $href,

         CURLOPT_HEADER => 0,

         CURLOPT_RETURNTRANSFER => 1,

     ));

     curl_multi_add_handle($mhandle,$tmp_h);

     $handle[] = $tmp_h;

 }

 do{

     $mrc = curl_multi_exec($mhandle,$active);

 }while($mrc == CURLM_CALL_MULTI_PERFORM);

 while($mrc == CURLM_OK && $active) {

     while(curl_multi_exec($mhandle,$active) == CURLM_CALL_MULTI_PERFORM);

     if(curl_multi_select($mhandle) != -1) {

         do{

             $mrc = curl_multi_exec($mhandle,$active);

         }while($mrc == CURLM_CALL_MULTI_PERFORM);

     }

 }

 // 获取这些页面的内容

 $mtext = null;

 foreach($handle as $tmp_h) {

     $mtext .= curl_multi_getcontent($tmp_h);

     curl_multi_remove_handle($mhandle, $tmp_h);

 }

 $mmatches = array();

 preg_match_all("/<title>(.*?)<\/title>/",$mtext, $mmatches);

 // 编码转换

 mb_detect_order('GB2312,GBK,BIG5,GB18030,UNICODE ,CP936');

 foreach($mmatches[1] as $key => $val) {

     $encoding = mb_detect_encoding($val);

     if($encoding != 'UTF-8' && $encoding != 'CP936' && $encoding != 'GB18030' && $encoding !='') {

         $mmatches[1][$key] = iconv($encoding,'UTF-8//IGNORE',$val);

     }

 }

 // 打印title信息

 var_dump($mmatches[1]);

 // 关闭批处理句柄

 curl_multi_close($mhandle);