Not able to get the orientation of images from iphone5 and 6

Hi
I am using EXIF Orientation to get the orientation of the images coming from iphone5 and 6. Unfortunately when I print $file_exif not able to get the orientation of that images. If I have download some sample images from google having orientation I can see the value in the variable.

I have also tried to customize a bit still not able get the orientation.

Original Code in the Module :

function _exif_orientation_rotate($file) {
  if (function_exists('exif_read_data') && $file->filemime == 'image/jpeg') {
    $file_exif = exif_read_data(drupal_realpath($file->uri));

    // Ensure that the Orientation key|value exists, otherwise leave.
    if (!isset($file_exif['Orientation'])) {
      return;
    }
    // Orientation numbers and corresponding degrees.
    // @note: Odd numbers are flipped images, would need different process.
    switch ($file_exif['Orientation']) {
      case 3:
          $degrees = 180;
          break;
      case 6:
          $degrees = 90;
          break;
      case 8:
          $degrees = 270;
          break;
      default:
          $degrees = 0;
    }

    if ($degrees > 0) {
      // Load the image object for manipulation
      $file_image = image_load(drupal_realpath($file->uri));

      if (image_rotate($file_image, $degrees)) {
        image_save($file_image);
      }
    }
  }
}

Modified Code to check :

if (function_exists('exif_read_data') && $file->filemime == 'image/jpeg') {
//    $file_exif = exif_read_data(drupal_realpath($file->uri));
//    // Ensure that the Orientation key|value exists, otherwise leave.
//    if (!isset($file_exif['Orientation'])) {
//      return;
//    }
    $image_file_path = drupal_realpath($file->uri);
//    $image_file_path = $image_file_info[0]->filepath;
    $imge_info = image_get_info($image_file_path);
    $img = imagecreatefromjpeg("{$image_file_path}");
        $width = $imge_info['width'];
        $height = $imge_info['height'];
        $thumbWidth = $imge_info['width'];
// calculate thumbnail size
        $new_width = $thumbWidth;
        $new_height = floor($height * ( $thumbWidth / $width ));
// create a new temporary image
        $tmp_img = imagecreatetruecolor($new_width, $new_height);
// copy and resize old image into new image
        imagecopyresized($tmp_img, $img, 0, 0, 0, 0, $new_width, $new_height, $width, $height);
        $exif = exif_read_data(drupal_realpath($file->uri));
        $file_exif = $exif["Orientation"];
        
        
    // Orientation numbers and corresponding degrees.
    // @note: Odd numbers are flipped images, would need different process.
        echo '<pre>';
print_r($exif); die;
    switch ($file_exif['Orientation']) {
      case 3:
          $degrees = 180;
          break;
      case 6:
          $degrees = 90;
          break;
      case 8:
          $degrees = 270;
          break;
      default:
          $degrees = 0;
    }

    if ($degrees > 0) {
      // Load the image object for manipulation
      $file_image = image_load(drupal_realpath($file->uri));

      if (image_rotate($file_image, $degrees)) {
        image_save($file_image);
      }
    }
  }
}

Thanks
Jyotisankar