Михаил Конюхов

foreach ($all as $one) {
    $pid = pcntl_fork();
    if ($pid == -1) {
       die('could not fork');
    } else if ($pid) {
      pcntl_wait($status); //Protect against Zombie children
      continue;
    } else {
      $one->doSomething(); 
      exit(0);
    }
}