In this post, We will learn how to Codeigniter 3 resize image and create thumbnail example . Here use "image_lib" library for resize image in codeigniter.
Step 1:
Download Codeigniter 3 https://codeigniter.com/download
Step 2:
Create Routes application/config/routes.php
<?php
defined('BASEPATH') OR exit('No direct script access allowed');
$route['default_controller'] = 'welcome';
$route['404_override'] = '';
$route['translate_uri_dashes'] = FALSE;
$route['image-upload'] = 'ImageUpload';
$route['image-upload/post']['post'] = "ImageUpload/uploadImage";
Step 3:
Create ImageUpload Controller application/controllers/ImageUpload.php
<?php
class ImageUpload extends CI_Controller {
/**
* Manage __construct
*
* @return Response
*/
public function __construct() {
parent::__construct();
$this->load->helper(array('form', 'url'));
}
/**
* Manage index
*
* @return Response
*/
public function index() {
$this->load->view('imageUploadForm', array('error' => '' ));
}
/**
* Manage uploadImage
*
* @return Response
*/
public function uploadImage() {
$config['upload_path'] = './uploads/';
$config['allowed_types'] = 'gif|jpg|png';
$config['max_size'] = 1024;
$this->load->library('upload', $config);
if ( ! $this->upload->do_upload('image')) {
$error = array('error' => $this->upload->display_errors());
$this->load->view('imageUploadForm', $error);
}else {
$uploadedImage = $this->upload->data();
$this->resizeImage($uploadedImage['file_name']);
print_r('Image Uploaded Successfully.');
exit;
}
}
/**
* Manage uploadImage
*
* @return Response
*/
public function resizeImage($filename)
{
$source_path = $_SERVER['DOCUMENT_ROOT'] . '/uploads/' . $filename;
$target_path = $_SERVER['DOCUMENT_ROOT'] . '/uploads/thumbnail/';
$config_manip = array(
'image_library' => 'gd2',
'source_image' => $source_path,
'new_image' => $target_path,
'maintain_ratio' => TRUE,
'create_thumb' => TRUE,
'thumb_marker' => '_thumb',
'width' => 150,
'height' => 150
);
$this->load->library('image_lib', $config_manip);
if (!$this->image_lib->resize()) {
echo $this->image_lib->display_errors();
}
$this->image_lib->clear();
}
}
?<
Step 4:
Create View application/views/imageUploadForm.php
<!DOCTYPE html>
<html>
<head>
<title>Codeignier 3 Image Upload with Resize Example from Scratch</title>
</head>
<body>
<?php echo $error;?>
<?php echo form_open_multipart('image-upload/post');?>
<input type="file" name="image" size="20" />
<input type="submit" value="upload" />
</form>
</body>
</html>
There you go, now you can run this example.