Php多线程的使用，首先需要PHP5.3以上版本，并安装pthreads PHP扩展，可以使PHP真正的支持多线程，扩展如何安装请自行百度

PHP扩展下载：htt://github.com/krakjoe/pthreads

PHP手册文档：http://php.net/manual/zh/book.pthreads.php

在安装好扩展之后，就可以运用多线程了，下面贴个通过搜索结果抓取百度网盘内容的代码：

     start ();   }   foreach ( $thread_array as $thread_array_key => $thread_array_value ) {
   //检查线程是否执行结束    while ( $thread_array [$thread_array_key]->isRunning () ) {     usleep ( 10 );    }    if ($thread_array [$thread_array_key]->join ()) {
   //如果执行结束，取出结果     $temp = $thread_array [$thread_array_key]->data;     if ($temp != null)      $infos ['res'] [] = $temp;    }   }   $infos ['pages'] = $ret ['pages'];   $infos ['status'] = "1";  } else  $infos = null; } else  $infos = null; return $infos;}/** * 获取百度搜索结果列表URL * * @param string $url *         搜索结果页URL * @param int $format *         默认$format=0，获取默认地址；$format=1获取跳转后真实地址 * @return NULL multitype:array() */function BaiduSRLinksGet($url, $format = 0) { $html = CurlLoad::HtmlGet ( $url ); // 获取页面 if ($html == null)  return null; try {  preg_match_all ( "/"url":"(?
     
      .*)"}/", $html, $rets ); // 搜索结果链接筛选  if (! array_key_exists ( 'links', $rets )) // 如果数组中不包含Links键名，表示获取失败   return null;  $ret = array ();  if ($format == 1) {   $number = count ( $rets ['links'] );   for($i = 0; $i < $number; $i ++) {    $headr_temp = CurlLoad::Get_Headers ( $rets ['links'] [$i], 1 ); // 通过headr获取真实地址    if (array_key_exists ( "Location", $headr_temp ))     $ret ['links'] [$i] = $headr_temp ['Location'];    else     $ret ['links'] = $rets ['links'];   }  } else   $ret ['links'] = $rets ['links'];  preg_match_all ( '/href="?/s?wd=site%3Apan.baidu.com%20(?
      
       .+?)&ie=utf-8">/', $html, $out );  unset ( $out ['url'] [0] );  $number = count ( $out ['url'] );  for($i = 1; $i < $number; $i ++) {   preg_match_all ( '/&pn=(.*)/', $out ['url'] [$i], $temp );   $ret ['pages'] [$temp [1] [0] / 10] = base64_encode ( $out ['url'] [$i] );  }  return $ret; } catch ( Exception $e ) {  WriteLog ( $e );  return null; }}/** * 百度网盘资源信息获取 * * @param string $url *         网盘资源页URL * @return NULL array */function PanInfoGet($url) { $html = CurlLoad::HtmlGet ( $url ); // 获取页面 if ($html == null)  return null; try {  if (preg_match_all ( "/文件名:(?
       
        .*) 文件大小:(?
        
         .*) 分享者:(?
         
          .*) 分享时间:(?
          
           .*) 下载次数:(?
           
            [0-9]+)/", $html, $ret ) == 0) return null; $rets ['name'] = $ret ['name'] [0]; $rets ['size'] = $ret ['size'] [0]; $rets ['user'] = $ret ['user'] [0]; $rets ['date'] = $ret ['date'] [0]; $rets ['number'] = $ret ['number'] [0]; $rets ['link'] = $url; return $rets; } catch ( Exception $e ) { WriteLog ( $e ); return null; }}function WriteLog($str) { $file = fopen ( "../error.log", "a+" ); fwrite ( $file, "Warning:" . date ( "Y/m/d H:i:s" ) . ":" . $str . "rn" ); fclose ( $file );}/** * 多线程抓取对象 * @author MuXi * */class baidu_thread_run extends Thread { public $url; public $data; public function __construct($url) { $this->url = $url; } public function run() { if (($url = $this->url)) { $this->data = PanInfoGet ( $url );//线程执行方法 } }}?>