Automatic image rotation based on EXIF data

Code:

&lt;?php if (!defined('BASEPATH')) exit('No direct script access allowed');



/**

* @file application/libraries/Image_autorotate.php

*/

class Image_autorotate

{

 function __construct($params = NULL) {

  

  if (!is_array($params) || empty($params)) return FALSE;

  

  $filepath = $params['filepath'];

  $exif = @exif_read_data($filepath);

  

  if (empty($exif['Orientation'])) return FALSE;

  

  $CI =& get_instance();

  $CI->load->library('image_lib');

  

  $config['image_library'] = 'gd2';

  $config['source_image'] = $filepath;

  

  $oris = array();

  

  switch($exif['Orientation'])

  {

   case 1: // no need to perform any changes

   break;

 

   case 2: // horizontal flip

   $oris[] = 'hor';

   break;

                                 

   case 3: // 180 rotate left

   $oris[] = '180';

   break;

                     

   case 4: // vertical flip

   $oris[] = 'ver';

   break;

                 

   case 5: // vertical flip + 90 rotate right

   $oris[] = 'ver';

   $oris[] = '270';

   break;

                 

   case 6: // 90 rotate right

   $oris[] = '270';

   break;

                 

   case 7: // horizontal flip + 90 rotate right

   $oris[] = 'hor';

   $oris[] = '270';

   break;

                 

   case 8: // 90 rotate left

   $oris[] = '90';

   break;

   

   default: break;

  }

  

  foreach ($oris as $ori) {

   $config['rotation_angle'] = $ori;

   $CI->image_lib->initialize($config); 

   $CI->image_lib->rotate();

  }

 }

}



// END class Image_autorotate



/* End of file Image_autorotate.php */

/* Location: ./application/libraries/Image_autorotate.php */

Code:

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

$full_path = $imageinfo['full_path'];



// check EXIF and autorotate if needed

$this->load->library('image_autorotate', array('filepath' => $full_path));