如何在Codeigniter中更新（编辑）多个图像（文件）

Question

我想在提交表单时同时在codeigniter中更新多个图像，并在Submit上上传新图像。这仅适用于上传新的多个图像 这是我的控制器文件

公共功能product_edit（$ product_id）{

<tbody>
    <% @patients.each do |patient| %>
        <tr>
            <td><%= patient.first_name %></td>
            <td><%= patient.last_name %></td>
            <td><%= patient.gender %></td>
            <td>
            <% if patient.most_recent_surgery %>
                <%= patient.most_recent_surgery.to_time.strftime('%d-%m-%Y') %>
            <% end %></td>
            <td class="centra"><%= link_to t('edit'), edit_patient_path(patient) %></td>
            <td class="centra"><%= link_to t('delete'), patient, method: :delete, data: { confirm: 'Eliminazione irreversibile. Continuare?' } %></td>
        </tr>
    <% end %>
</tbody>

<div style="text-align:center;"><%= paginate @patients %></div>

}

这是我的模特

公共函数updateProduct（$ product_id，$ updateData，$ filename，$ sub_category_id，$ category_id）{

    $data["data"] = $this->Menu_management_model->getCat();
    $this->load->view('header',$data);
    $category_id= $this->uri->segment(4);
    $viewData['data'] = $this->Menu_management_model->getProduct($id='',$product_id);
    $viewData['image'] = $this->Menu_management_model->getProductPhoto($id='',$product_id);
    $this->load->view('products/product_edit', $viewData);
    $updateData = array(
        'product_name' => $this->input->post('product_name'),
        'product_description'=> $this->input->post('product_description'),
    );
    if($this->input->post('update_product')){
        $sub_category_id= $this->input->post('sub_category_id');
        $files = $_FILES;
        if(!empty($files['product_photo']['name'])){
            $count = count($_FILES['product_photo']['name']);
            for($i=0; $i<$count; $i++){
                $_FILES['product_photo']['name']= $files['product_photo']['name'][$i];
                $_FILES['product_photo']['tmp_name']= $files['product_photo']['tmp_name'][$i];
                $_FILES['product_photo']['size']= $files['product_photo']['size'][$i];
                $config['upload_path'] = 'assets/uploads/products/';
                $config['allowed_types'] = 'jpg|png|jpeg';
                $this->load->library('upload', $config);
                $this->upload->initialize($config);
                $this->upload->do_upload('product_photo');
                $fileName = $this->upload->data('file_name');
                $images[] = $fileName;
            }
            $fileName = implode(',',$images);
            $update= $this->Menu_management_model->updateProduct($product_id,$updateData,$fileName,$sub_category_id,$category_id);

        }

这是我的查看页面，所以请检查并帮助我

    $update= $this->db->update('products', $updateData, array('product_id'=>$product_id));
    if($filename!='' ){
        $filename1 = explode(',',$filename);
        foreach($filename1 as $file){
            $file_data = array(
                'product_photo' => $file,
                'product_id' => $product_id,
                'sub_category_id'=>$sub_category_id,
                'category_id'=>$category_id
            );
            $update = $this->db->insert('product_images', $file_data);
        }
    }
    return $update?true:false;
}