在codeigniter中上传不起作用。可能是什么原因？

Question

这是控制器，和我有没有错误

public function admin_page(){ 
    if($this->input->post('add_product')){    
     if(empty($_FILES['userfile']['name'])){ 
      $data = array(
       'category' => $this->input->post('category') , 
       'product_name' => $this->input->post('name') , 
       'description' => $this->input->post('description'), 
       'image' => 'no_image.jpg' 
      ); 
     } else{      
      $config['upload_path'] = './public/images/'; 
      $config['allowed_types'] = 'gif|jpg|png|jpeg|JPG'; 
      $config['max_size'] = '1000'; 
      $this->load->library('upload', $config); 
      $this->upload->do_upload('userfile'); 
      echo 'uploaded :)'; 
      $data = array(
       'category' => $this->input->post('category') , 
       'product_name' => $this->input->post('name') , 
       'description' => $this->input->post('description'), 
       'image' => $_FILES['userfile']['name'] 
      );   
     }  
     $this->load->model('products'); 
     $this->products->add_product($data); 
    } 
    $this->load->view('admin_page'); 
} 

查看

<form action="<?php echo base_url();?>admin/admin_page" method="post" enctype="multipart/form-data"> 
     <div class="col-xs-3"> 
      <div class="form-group"> 
       <label for="exampleInputEmail1"> Product name </label> 
       <input type="text" name="name" class="form-control" > 
      </div> 
      <div class="form-group"> 
       <label for="exampleInputEmail1"> Category </label> 
       <input type="text" name="category" class="form-control"> 
      </div> 
      <div class="form-group"> 
       <label for="exampleInputEmail1"> Description </label> 
       <textarea class="form-control" name="description" rows="3"></textarea> 
      </div> 
      <div class="form-group"> 
       <label for="exampleInputEmail1"> Image </label> 
       <input type="file" name="userfile" class="form-control"> 
      </div> 
      <input type="submit" name="add_product" class="btn btn-default" value="OK" /> 
     </div> 
    </form> 
</div> 

Answer 1

注：检查事项上笨3.

确保控制器和模型名称有第一个字母大写 Admin.php和class Admin extends CI_Controller {

和型号Products.php和class Products extends CI_Model {

CI2上传http://www.codeigniter.com/userguide2/libraries/form_validation.html

CI3上传http://www.codeigniter.com/user_guide/libraries/file_uploading.html

控制器

<?php 

class Admin extends CI_Controller { 

    public function __construct() { 
     parent::__construct(); 
     $this->load->helper(array('form', 'url')); 
     $this->load->library('form_validation'); 
     $this->load->library('upload'); 

     //$this->load->model('products'); 
    } 

    public function index() { 

    } 

    public function admin_page() { 

     $this->form_validation->set_rules('name', 'Name', 'required'); 
     $this->form_validation->set_rules('category', 'Category', 'required'); 
     $this->form_validation->set_rules('description', 'Description', 'required'); 

     if ($this->form_validation->run() == FALSE) { 

      $data['upload_errors'] = $this->upload->display_errors(); 

      $this->load->view('admin_page', $data); 

     } else { 


      /* 
      * If userfile checks if. 
      * 
      */ 

      if (!empty($_FILES['userfile']['name'])) { 

       /* 
       * 
       * Make sure your images upload path is on the main directory 
       * 
       * application 
       * public 
       * public > images 
       * system 
       * .htaccess 
       * index.php 
       * 
       */ 

       $config['upload_path'] = './public/images/'; 
       $config['allowed_types'] = 'gif|jpg|png'; 
       $config['max_size'] = '3000'; 
       $config['max_width'] = '0'; 
       $config['max_height'] = '0'; 

       $this->upload->initialize($config); 

       $field_name = 'userfile'; 

       if (! $this->upload->do_upload($field_name)) { 

        $data['upload_errors'] = $this->upload->display_errors(); 

        $this->load->view('admin_page', $data); 

       } else { 

        /* 
        * Using the variable below you are able to get codeigniter file upload info. 
        * Note: Codeigniter upload only made for one file 
        * $upload_data = $this->upload->data(); 
        * 
        */ 

        $upload_data = $this->upload->data(); 

        $data = array(
         'category' => $this->input->post('category') , 
         'product_name' => $this->input->post('name') , 
         'description' => $this->input->post('description'), 
         'image' => $upload_data['file_name'] 
        ); 

        $this->products->add_product($data); 

        $data['upload_errors'] = ''; 

        $this->load->view('admin_page', $data); 
       } 


       /* 

        If no image isset 

       */ 

      } else { 

       echo "No File Isset"; 


       $data = array(
        'category' => $this->input->post('category') , 
        'product_name' => $this->input->post('name') , 
        'description' => $this->input->post('description'), 
        'image' => 'no_image.jpg' 
       ); 


       $this->products->add_product($data); 

       $data['upload_errors'] = ''; 

       $this->load->view('admin_page', $data); 

      } 

     } 
    } 
} 

查看

更改输入提交按钮提交。

<div class="container"> 

<?php echo validation_errors('<div class="alert alert-danger">', '</div>'); ?> 

<?php if ($upload_errors) {?> 
    <div class="alert alert-info"><?php echo $upload_errors;?></div> 
<?php }?> 

<?php echo form_open_multipart('admin/admin_page');?> 

    <div class="form-group"> 
     <label>Product name</label> 
     <input type="text" name="name" class="form-control" value="<?php echo set_value('name');?>" size="50"> 
    </div> 

    <div class="form-group"> 
     <label>Category</label> 
     <input type="text" name="category" value="<?php echo set_value('category');?>" class="form-control" size="50"> 
    </div> 

    <div class="form-group"> 
     <label>Description</label> 
     <textarea class="form-control" name="description" rows="3"></textarea> 
    </div> 

    <div class="form-group"> 
     <label>Image</label> 
     <input type="file" name="userfile" size="20"> 
    </div> 

    <div class="form-group">  
     <button type="submit" class="btn btn-default">Save</button> 
    </div> 

<?php echo form_close();?> 

</div> 

我会用CodeIgniter的form_open_multipart()http://www.codeigniter.com/user_guide/helpers/form_helper.html

所有的工作我的结束。