这篇文章将为大家详细讲解有关怎么在PHP中利用pthreads实现一个多线程，文章内容质量较高，因此小编分享给大家做个参考，希望大家阅读完这篇文章后对相关知识有一定的了解。

1、扩展的编译安装(Linux），编译参数 –enable-maintainer-zts 是必选项：

复制代码 代码如下:

cd /Data/tgz/php-5.5.1
./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

php.ini中添加：

复制代码 代码如下:

vi /Data/apps/php/etc/php.ini
extension = "pthreads.so"

给出一段PHP多线程、与For循环，抓取百度搜索页面的PHP代码示例：

复制代码 代码如下:

<?php
  class 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)."
";

  $t = microtime(true);
  foreach ($urls_array as $key => $value)
  {
      $result_new[$key] = model_http_curl_get($value["url"]);
  }
  $e = microtime(true);
  echo "For循环：".($e-$t)."
";
?>