March 20, 2017

Codeigniter File Uploading Class Library

Codeigniter File Uploading Class Library – This library provides various functions that are used to give permission of files to be uploaded. We can set many preferences, like type and size of files. $this->load->library(‘upload’); is used to load the library. This library is also equip for check file type and file size. Here in this tutorial, we are going to explain how to use file uploading class library.

Codeigniter file uploading class library | Load | Example

Let us understand how file uploading class works in codeigniter with examples.

Load file uploading class library

First load file uploading library to use its functions, this library can be loaded simply as below-

How to load file uploading class library:

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

class referneces:-

There are following reference in file uploading class.

1. Initialize.
2. Upload
3. Display errors
4. Data

1. Initialize.

Syntax of initialize function is

Syntax of initialize function is:-

initialize([array $config = array()[$reset = TRUE]])

Parameters:

$config (array) : Preferences
$reset (bool) : Whether to reset preferences (that are not provided in $config) to their defaults
Returns : CI_Upload instance (method chaining)
Return type : CI_Upload

2. Upload.

Syntax of Upload function is

Syntax of Upload function is:-

do_upload([$field = 'userfile'])

Parameters:

$field (string) : Name of the form field
Returns : TRUE on success, FALSE on failure
Return type : bool

3. Display errors.

Syntax of display errors function is

Syntax of display errors function is:-

display_errors([$open = '<p>'[$close = '</p>']])

Parameters:

$open (string) : Opening markup
$close (string) : Closing markup
Returns : Formatted error message
Return type : string

4. Data.

Syntax of data function is

Syntax of data function is:-

data([$index = NULL])

Parameters:

$data (string) : Element to return instead of the full array
Returns : Information about the uploaded file
Return type : mixed

EXAMPLE OF FILE UPLOADING

Controller parts:-

[File Name = upload_controller.php]:-


<?php
defined('BASEPATH') OR exit('No direct script access allowed');

class upload_controller extends CI_Controller
{
public function index()
{
$this->load->view('upload_view');
}
public function uploadfile()
{
$config['upload_path']          = './uploads/';
$config['allowed_types']        = 'gif|jpg|png';
$config['max_size']             = 4096;
$config['max_width']            = 2000;
$config['max_height']           = 2000;
$fileName = 'fileToUpload';
$this->load->library('upload', $config);
if ( ! $this->upload->do_upload($fileName))
{
$error = $this->upload->display_errors($fileName);
echo $error;
}
else
{
$data = $this->upload->data();
$message = "<span style='color:green'>Successfully Uploaded</span>";
$this->session->set_flashdata('message', $message);
redirect(base_url('index.php/library/upload_Controller/index'));
}}}
?>

View part:-

[File Name = upload_view.php]:-

<div>
	<?php  
	echo $this->session->flashdata('message'); 
	?>
</div>
<?php echo form_open_multipart('index.php/library/upload_controller/uploadfile');?>

<input type="file" name="fileToUpload" size="20" />
<br /><br />
<input type="submit" value="upload" />
</form>

The output will be like this –

Selected file

Codeigniter File Uploading Class Library

Successfull message

File save location

Codeigniter File Uploading Class Library