如何通过文件验证来验证2张图片字段，然后上传这些图片？

Question

您好，开发人员我想对具有不同配置的输入字段和2个图像字段进行验证，然后上传图像。上传后，要将这些图像名称保存在数据库中。

public function addcourse()
    {
    if ($_SERVER['REQUEST_METHOD'] == "POST")
        {
        $this->form_validation->set_rules('course_name', 'Course 
        Name', 'trim|required|min_length[2]|max_length[50]', array(
            'required' => '%s is required.'
        ));
        $this->form_validation->set_rules('meta_title', 'Meta 
        Title', 'trim|required', array(
            'required' => '%s is required.'
        ));
        $this->form_validation->set_rules('meta_description', 'Meta 
         'trim | required',
          array('required' => ' % sisrequired . '));

     if (empty($_FILES['image']['name'])) 
       {
          $this->form_validation->set_rules('image', 'Courseimage','trim | required',array('required'=> ' % sisrequired . '));
        }

    if (empty($_FILES['bannerimage']['name'])) 
     {
       {
         $this->form_validation->set_rules('bannerimage', 'Courseimage','trim | required',array('required'=> ' % sisrequired . '));
       }


    if ($this->form_validation->run() == false) 
                         {
                            $this->add();
                         }
                           else
                         {


             $course_name = $this->input->post('course_name');
             $meta_title = $this->input->post('meta_title');
             $meta_description = $this->input->post('meta_description');




        if(isset($_FILES['image']['name']) && $_FILES['image']['name']!='')
             {
           $config2['upload_path']  = ' . /images / uploads / courses / ';
               $config2['allowed_types']= 'gif | jpg | png';
               $config2['max_size']     = 1000;
               $config2['max_width']    = 2000;
               $config2['max_height']   = 2000;
            $config2['file_ext_tolower']= true;


            $this->upload->initialize($config2);
        $this->load->library('upload', $config2);
        if (!$this->upload->do_upload('image'))
           {
            $this->session->set_flashdata("warning", 
            $this->upload->display_errors());
            redirect(base_url('admin / course / add'));
       } 
             else 
           {
              $fileData = $this->upload->data();
          $userfile2 = $fileData['file_name'];
           }

       }

       if(isset($_FILES['bannerimage']['name']) && 
        $_FILES['bannerimage']['name']!='') 
      {
          $config2['upload_path']  = ' . /images / uploads / banners / ';
               $config2['allowed_types']= 'gif | jpg | png';
               $config2['max_size']     = 700;
               $config2['max_width']    = 1500;
               $config2['max_height']   = 800;
            $config2['file_ext_tolower']= true;


            $this->upload->initialize($config2);
        $this->load->library('upload', $config2);
        if (!$this->upload->do_upload('bannerimage'))
           {
            $this->session->set_flashdata("warning", 
            $this->upload->display_errors());
            redirect(base_url('admin / course / add'));
       } 
             else 
           {
              $fileData = $this->upload->data();
          $userfile = $fileData['file_name];
        }
    }                               

但是代码中正在发生的事情也正在保存并进行验证，但是如果一个文件验证为真，它将上传文件，但是如果第二个失败则显示错误>所以我想要在条件为真时保存两个文件显示验证错误。