PHP pthreads 多线程操作

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1、php采用安全线程模式进行编译 --enable-maintainer-zts 必须加上

configure_options=" '--prefix=/usr/local/php' '--with-config-file-path=/usr/local/php/etc' '--enable-fpm' '--with-fpm-user=www' '--with-fpm-group=www' '--with-mysql=mysqlnd' '--with-mysqli=mysqlnd' '--with-pdo-mysql=mysqlnd' '--with-iconv-dir' '--with-freetype-dir=/usr/local/freetype' '--with-jpeg-dir' '--with-png-dir' '--with-zlib' '--with-libxml-dir=/usr' '--enable-xml' '--disable-rpath' '--enable-bcmath' '--enable-shmop' '--enable-sysvsem' '--enable-inline-optimization' '--with-curl' '--enable-mbregex' '--enable-mbstring' '--with-mcrypt' '--enable-ftp' '--with-gd' '--enable-gd-native-ttf' '--with-openssl' '--with-mhash' '--enable-pcntl' '--enable-sockets' '--with-xmlrpc' '--enable-zip' '--enable-soap' '--with-gettext' '--disable-fileinfo' '--enable-opcache' '<span style="color:#ff0000;">--enable-maintainer-zts'</span>"

2、安装pthreads 下载路径为 https://github.com/krakjoe/pthreads php7版本采用V3，php5.3以上版本采用V2。

编译安装成功之后，增加 extension=pthreads.so

重启nginx和php-fpm，提示

Starting php-fpm Failed loading /usr/local/zend/ZendGuardLoader.so:  /usr/local/zend/ZendGuardLoader.so: undefined symbol: executor_globals done

这是由于php在安全线程模式下运行不支持ZendGuardLoader的原因，可以直接无视。

3、下面感受一下多线程的效率

<?phpclass test_thread_run extends Thread  {      public $url;      public $data;      public function __construct($url)      {          $this->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"; ?>

多线程：0.9154269695282 For循环：5.3936388492584

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