php多进程几个例子

                                                                                                //输出重定向到log文件                  
function echo_to_log($content){
    global $current_pid;
    $logfile =  __FILE__ . $current_pid .  '.log';
    $fp = fopen($logfile, 'a+');
    fwrite($fp, $content);
    fclose($fp);
}
                                                                                 
ob_start('echo_to_log');
//获取当前进程pid
$current_pid = getmypid();
$fork_nums = 10;
$total = 1000;
                                                                                 
for($i = 0; $i < $fork_nums; $i++){
    $pid = pcntl_fork();
    //等于0时，是子进程
    if($pid == 0){
        $current_pid = $pid;
        do_task($i);
     //大于0时，是父进程，并且pid是产生的子进程的PID
    } else if($pid > 0) {
    }
}
                                                                                 
//任务函数
function do_task($task_num){
    global $total;
    $start = $total / 10 * $task_num;
    $end = $total / 10 * ($task_num + 1);
    for(;$start<$end;$start++){
        echo $task_num . " " . $start . "＼n";
    }
    //子进程执行完任务以后终止，当然你可以返回主进程的代码部分做相关操作。
    exit();
}

declare(ticks=1);
function sigHandler($signal)
{
    echo "a child exited＼n";
}
pcntl_signal(SIGCHLD, sigHandler, false);
echo "this is " . posix_getpid() . PHP_EOL;
for($i=0; $i<3; $i++)
{
    $pid = pcntl_fork();
    if($pid == -1)
    {  
        echo 'fork failed ' . PHP_EOL;
    }  
    else if($pid)
    {  
    }  
    else
    {  
        $pid = posix_getpid();
        echo 'child ' . $pid . ' ' . time() . PHP_EOL;
        sleep(rand(2,5));
        echo 'child ' . $pid . ' done ' . time() . PHP_EOL;
        exit(0);
    }  
}
do
{
    $pid = pcntl_wait($status);
    echo 'child quit ' . $pid . PHP_EOL;
}while($pid > 0);
echo 'parent done' . PHP_EOL;

  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)."＼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";
?>

$thread = new thread();
$thread->addthread('func1','info1');
$thread->addthread('func2','info2');
$thread->addthread('func3','info3');
$thread->runthread();

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

vi /Data/apps/php/etc/php.ini