关于php多线程抓取信息小试

php相关 / 2014年02月17日 17时39分 / 8566人浏览
PHP 5.3 以上版本,使用pthreads PHP扩展,可以使PHP真正地支持多线程。多线程在处理重复性的循环任务,能够大大缩短程序执行时间。 PHP扩展下载:https://github.com/krakjoe/pthreads PHP手册文档:http://php.net/manual/zh/book.pthreads.php 1、扩展的编译安装(Linux),编辑参数 --enable-maintainer-zts 是必选项:
cd /Data/tgz/php-5.3.8
./configure --prefix=/Data/apps/php --with-config-file-path=/Data/apps/php/etc --with-mysql=/Data/apps/mysql --with-mysqli=/Data/apps/mysql/bin/mysql_config --with-iconv-dir --with-freetype-dir=/Data/apps/libs --with-jpeg-dir=/Data/apps/libs --with-png-dir=/Data/apps/libs --with-zlib --with-libxml-dir=/usr --enable-xml --disable-rpath --enable-bcmath --enable-shmop --enable-sysvsem --enable-inline-optimization --with-curl --enable-mbregex --enable-fpm --enable-mbstring --with-mcrypt=/Data/apps/libs --with-gd --enable-gd-native-ttf --with-openssl --with-mhash --enable-pcntl --enable-sockets --with-xmlrpc --enable-zip --enable-soap --enable-opcache --with-pdo-mysql --enable-maintainer-zts
make clean
make
make install        

unzip pthreads-master.zip
cd pthreads-master
/Data/apps/php/bin/phpize
./configure --with-php-config=/Data/apps/php/bin/php-config
make
make install
添加扩展:
vi /Data/apps/php/etc/php.ini
extension = "pthreads.so"
一段PHP多线程、与For循环,抓取百度搜索页面的PHP代码示例:
url = $url;  
      }  
  
      public function run()  
      {  
          if(($url = $this->url))  
          {  
              $this->data = model_http_curl_get($url);  
          }  
      }  
  }  
  
  function model_thread_result_get($urls_array)   
  {  
      foreach ($urls_array as $key => $value)   
      {  
          $thread_array[$key] = new test_thread_run($value["url"]);  
          $thread_array[$key]->start();  
      }  
  
      foreach ($thread_array as $thread_array_key => $thread_array_value)   
      {  
          while($thread_array[$thread_array_key]->isRunning())  
          {  
              usleep(10);  
          }  
          if($thread_array[$thread_array_key]->join())  
          {  
              $variable_data[$thread_array_key] = $thread_array[$thread_array_key]->data;  
          }  
      }  
      return $variable_data;  
  }  
  
  function model_http_curl_get($url,$userAgent="")   
  {  
      $userAgent = $userAgent ? $userAgent : 'Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.2)';   
      $curl = curl_init();  
      curl_setopt($curl, CURLOPT_URL, $url);  
      curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);  
      curl_setopt($curl, CURLOPT_TIMEOUT, 5);  
      curl_setopt($curl, CURLOPT_USERAGENT, $userAgent);  
      $result = curl_exec($curl);  
      curl_close($curl);  
      return $result;  
  }  
  
  for ($i=0; $i < 100; $i++)   
  {   
      $urls_array[] = array("name" => "baidu", "url" => "http://www.baidu.com/s?wd=".mt_rand(10000,20000));  
  }  
  
  $t = microtime(true);  
  $result = model_thread_result_get($urls_array);  
  $e = microtime(true);  
  echo "多线程:".($e-$t)."\n";  
  
  $t = microtime(true);  
  foreach ($urls_array as $key => $value)   
  {  
      $result_new[$key] = model_http_curl_get($value["url"]);  
  }  
  $e = microtime(true);  
  echo "For循环:".($e-$t)."\n";  
?>