使用CodeIgniter更新和刪除圖片

Question

有些日子我一直在尋找教程來解決這個問題，但我還沒有找到。

控制器：City.php

public function edit() { 
    $id = $this->uri->segment(3); 
    if(empty($id)){ 
     redirect('city/add'); 
    } 

    $this->load->model('m_city'); 
    $res['data'] = $this->m_city->select_data($id); 

    if(empty($res['data'])){ 
     redirect('city/add'); 
    } 

    $this->load->view('design/header'); 
    $this->load->view('city/edit',$res); 
    $this->load->view('design/footer'); 
} 

public function update() { 
    $id = $this->uri->segment(3); 
    if($this->validate() == TRUE){ 
     $this->load->model('m_city'); 
     $res = $this->m_city->update_data(); 
     if($res){ 
      redirect('city'); 
     } 
    }else{ 
     redirect('city/edit/' . $id); 
    } 
} 

public function delete() { 
    $id = $this->uri->segment(3); 
    if(empty($id)){ 
     redirect('city'); 
    } 

    if($this->input->post('id')){ 
     $this->load->model('m_city'); 
     $res = $this->m_city->delete_data(); 
     if($res){ 
      redirect('city'); 
     } 
    } 

    $this->load->model('m_city'); 
    $res['data'] = $this->m_city->select_data($id); 

    if(empty($res['data'])){ 
     redirect('city'); 
    } 

    $this->load->view('design/header'); 
    $this->load->view('city/delete',$res); 
    $this->load->view('design/footer');   
} 

型號：M_city.php

function select_data($id = NULL) { 
    if(!empty($id)){ 
     $this->db->where('id', $id); 
    }   
    $query = $this->db->get('m_city'); 
    return $query->result(); 
} 

function update_data() { 
    $data = array(
     'name' => $this->input->post('name'), 
     'description' => $this->input->post('description'), 
     'name_image' => $name_image 
    ); 
    $this->db->where('id', $this->input->post('id')); 
    $this->db->update('m_city', $data); 
    return true;   
} 

function delete_data() { 
    $this->db->delete('m_city', array('id' => $this->input->post('id'))); 
    return true;   
} 

查看：edit.php

<section class="content"> 
    <div class="row"> 
    <div class="col-lg-12"> 
     <!-- general form elements --> 
     <div class="box box-primary"> 
     <div class="box-header"> 
      <h3 class="box-title">Edit City</h3> 
     </div><!-- /.box-header --> 
     <!-- form start --> 
     <?php 
      $id = $this->uri->segment(3); 
      $attributes = array('role' => 'form', 'id' => 'formedit'); 
      echo form_open('city/update/'.$id,$attributes); 
     ?> 
      <div class="box-body"> 
      <?php 
      echo validation_errors('<div class="alert alert-danger"><button class="close" data-dismiss="alert" type="button">×</button>','</div>'); 
      foreach ($data as $val) { 
       $name = $val->name; 
       $description = $val->description; 
      } 
      ?> 
       <input type="hidden" name="id" value="<?php echo $id;?>" /> 
      <div class="form-group"> 
       <label for="nm_city">City</label> 
       <input type="text" class="form-control" value="<?php echo $name; ?>" id="name" name="name" placeholder="City"> 
      </div> 
      <div class="form-group"> 
       <label for="description">Description</label> 
       <input type="text" class="form-control" value="<?php echo $description; ?>" id="description" name="decription" placeholder="Description"> 
      </div> 
      <div class="form-group"> 
       <label for="deal_descriptions">Image City</label> 
       <img width="200" src="<?= base_url(); ?>uploadfiles/<?php echo $name_image; ?>"> 
      </div> 
      </div><!-- /.box-body --> 

      <div class="box-footer"> 
      <button type="submit" class="btn btn-primary">Simpan</button> 
      <a href="<?=base_url() . 'city';?>" class="btn btn-default">Batal</a> 
      </div> 
     <?php echo form_close(); ?> 
     </div><!-- /.box --> 
    </div> 
    </div> <!-- /.row --> 
</section><!-- /.content --> 

如何實現功能更新和刪除的圖像碼？我非常感謝你的幫助。

Answer 1

在控制器

public function delete($id) { 

    if(empty($id)){ 
     redirect('city'); 
    } 
    else 
    { 

     $this->load->model('m_city'); 
     $res = $this->m_city->delete_data($id); 
     if($res == 0){ 
      redirect('city'); 
     } 
     else 
     { 
      $res['data'] = $this->m_city->select_data($id); 

      if(empty($res['data'])) 
      { 
       redirect('city'); 
      } 
      else 
      { 
       $this->load->view('design/header'); 
       $this->load->view('city/delete',$res); 
       $this->load->view('design/footer');   
      } 
     } 
    } 
} 

public function update_view($id) { 

    if($this->validate() == TRUE) 
    { 
     $this->load->model('m_city'); 
     $res = $this->m_city->select_data($id); 
     if(empty($res)) 
     { 
      redirect('city'); 
     } 
     else 
     { 
      #load the View of Edit 
     } 
    } 
    else 
    { 
     redirect('city/edit/' . $id); 
    } 
} 

public function update($id) { 

    if($this->validate() == TRUE) 
    { 
     $this->load->model('m_city'); 
     $res = $this->m_city->update_data(); 
     if($res == 0) 
     { 
      redirect('city'); 
     } 
     else 
     { 
      echo 'Edit Submitted'; 
     } 
    } 
    else 
    { 
     redirect('city/edit/' . $id); 
    } 
} 

在模型

function delete_data($id) { 

    if(!$this->db->delete('mytable', array('id' => $id))) //provide table name 
    { 
     return $log = 0; 
    } 
    else 
    { 
     return $log = ; 
    }  
} 

function select_data($id) { 

    if(!empty($id)) 
    { 
     $this->db->where('id', $id); 
     $query = $this->db->get('m_city'); 
    } 
    else 
    { 
     $query = $this->db->get('m_city'); 
    }  

    return $query->result_array(); 
} 

function update_data() { 

    $data = array(
     'name' => $this->input->post('name'), 
     'description' => $this->input->post('description'), 
     'name_image' => $name_image 
    ); 

    $this->db->where('id', $this->input->post('id')); 

    if($this->db->update('m_city', $data)) 
    { 
     return $log = 1; 
    } 
    else 
    { 
     return $log = 0; 
    } 

}