Codeigniter 中的文件上传错误

Question

我正在尝试在 codeigniter 中上传图片。

这是我的视图文件代码。

<form action="<?php echo site_url('pages/data_submitted') ?>" method="get" enctype="multipart/form-data">
Image: <input type="file" name="image"/>
<button>Submit</button>
</form>

这是我的控制器代码。

class Pages extends CI_Controller 
{ 
 public function data_submitted(){
 $config['upload_path']   =   "img/";
$this->load->library('upload',$config);
$this->upload->do_upload();
$finfo=$this->upload->data();
$data = $this->upload->display_errors();

$this->load->model('user_model');
$this->user_model->insert_item($data);
}
}

这是我的模型代码

<?php
class User_model extends CI_Model {
function __construct(){
    /* Call the Model constructor */
    parent::__construct();
}


public function insert_item($item){

    print_r($item);
}
}
?>

这段代码有什么问题... 这里我传递了 $data 只是为了检查是否发生任何错误。 它显示“您没有选择要上传的文件。”即使我选择了一个文件。 请帮帮我。

Answer 1

在 codeigniter 中上传文件要容易得多。在这里，我正在为视图文件和控制器文件编写代码。

查看文件

<html>
<body>
<?php if(isset($error)){echo $error;} ?>
<?php if(isset($success)){echo $success;} ?>    
<?php echo form_open_multipart('upload_controller/do_upload');?>
<input type='file' name='userfile' size='20' />
<input type='submit' name='submit' value='upload' /> 
</form>
</body>
</html>

控制器文件

为了启用文件上传，我们必须加载一个库它的“上传”

$this->load->library('upload');

<?php 

class Upload_Controller extends CI_Controller {

public function __construct() {
     parent::__construct();
}

public function index(){
    $this->load->view('fileupload_view');
}

public function do_upload(){

if (!is_dir('/upload')) {
    mkdir('./upload',777,0);         
}

$config = array(
'upload_path' => "./uploads/",
'allowed_types' => "gif|jpg|png|jpeg|pdf",
'overwrite' => TRUE,    
);

$this->load->library('upload', $config);

if($this->upload->do_upload())
{
     $data['upload_data'] = $this->upload->data();
     $data['success']= 'File Successfully Uploaded';
     $this->load->view('fileupload_view',$data);
}
else
{
     $error = array('error' => $this->upload->display_errors());
     $this->load->view('fileupload_view', $error);
}
}
}
?>

Answer 2

参考此代码。这肯定对你有用

public function uploadImage() {
        $this->load->helper(array('form', 'url'));  
        $config['upload_path'] = 'assets/images/b2bcategory';
        $config['allowed_types'] = 'gif|jpg|png';
        $config['max_size'] = '1000';
        $config['max_width'] = '2024';
        $config['max_height'] = '1768';
        $config['width'] = 75;
        $config['height'] = 50;
        if (isset($_FILES['catimage']['name'])) {
            $filename = "-" . $_FILES['catimage']['name'];
            $config['file_name'] = substr(md5(time()), 0, 28) . $filename;
        }
        $config['overwrite'] = TRUE;
        $config['remove_spaces'] = TRUE;
        $field_name = "catimage";
        $this->load->library('upload', $config);
        if ($this->input->post('selsub')) {
            if (!$this->upload->do_upload('catimage')) {
                //no file uploaded or failed upload
                $error = array('error' => $this->upload->display_errors());
            } else {
                $dat = array('upload_data' => $this->upload->data());
                $this->resize($dat['upload_data']['full_path'],           $dat['upload_data']['file_name']);
            }
            $ip = $_SERVER['REMOTE_ADDR'];
            if (empty($dat['upload_data']['file_name'])) {
                $catimage = '';
            } else {
                $catimage = $dat['upload_data']['file_name'];
            }
            $data = array(            
                'ctg_image' => $catimage,
                'ctg_dated' => time()
            );
            $this->b2bcategory_model->form_insert($data);

        }
    }

Answer 3

使用$this->upload->do_upload('image'); 而不是$this->upload->do_upload();

您必须在 do_upload() 中将文件输入名称作为参数传递。如果您没有传递字段名称，则默认情况下它将采用 userfile 。这就是为什么它给出You did not select a file to upload. 错误

Answer 4

试试这个：

查看页面

<?php echo echo form_open_multipart(base_url('Pages/data_submitted'),['name' => 'form', 'id' => 'form']);

  //or <form action="<?php echo base_url('Pages/data_submitted') ?>" method="post" enctype="multipart/form-data">

   Image: <input type="file" name="image"/>
   <button id="button" name="button">Submit</button>

</form>

控制器

class Pages extends CI_Controller 
{ 
    public function data_submitted(){

        $config['upload_path'] = getcwd().'/img/';
        $config['allowed_types'] = 'jpg|png';
        $config['max_size'] = 2500;
        $config['remove_space'] = TRUE;

        $this->load->library('upload',$config);
        $this->load->model('user_model');

        if($this->upload->do_upload(image))
        {
            $data = $this->upload->data();
            $this->user_model->insert_item($data);
        }
        else
        {
           $this->upload->display_errors();            
        }
     }
}

Answer 5

你必须在 do_upload 方法中提及字段名称。

<form method="post" enctype="multipart/form-data">
    <input type="file" name="field_name"/>
</form>

<?php
 $this->upload->do_upload('field_name');
 ?>

Answer 6

改变这个：

<button>Submit</button>

到这里：

<input type="submit" value="Submit" name="submit">

---

在控制器中

class Pages extends CI_Controller 
{ 
    public function data_submitted(){

        $this->load->helper(array('form', 'url'));

        $config['upload_path']   =   "./img/";
        $config['allowed_types'] = 'gif|jpg|png'; # Changed 

        $this->load->library('upload',$config);
        if(!$this->upload->do_upload())
        {
            $data = $this->upload->display_errors();
        }
        else{
            $finfo = $this->upload->data();
            $this->load->model('user_model');
            $this->user_model->insert_item($finfo);
        }

        # Load the view on here

    }
}