在CodeIgniter中使用gd2将图像旋转90度整体调整大小

我曾使用gd2库调整图像大小，但某些图像在调整大小后旋转了90度，但不是全部图像。我没有使用任何旋转，这可能是什么原因呢？是否需要设置其他配置？

我的代码在这里：

if(isset($_FILES) && !empty($_FILES)){

    $item_images = $_FILES;
    $this->load->library('upload');
    $this->load->library('image_lib'); 
    $config['upload_path']   = './temp/';
    $config['allowed_types'] = '*';
    $this->upload->initialize($config);

    //print_r($item_images);
    foreach($item_images as $ind=>$img_name){
        if($this->upload->do_upload($ind)){

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


            //for cropping
            $config_crop['image_library'] = 'gd2';
            $config_crop['source_image']     = $config['upload_path'] . $data_image['file_name'];
            $config_crop['create_thumb']     = FALSE;
            $config_crop['maintain_ratio']   = TRUE;
            $config_crop['width']       = 300;
            $config_crop['height']      = 300;
            //$config_crop['rotation_angle'] = '0';
            //$config_crop['x_axis'] = '100';
            //$config_crop['y_axis'] = '40';

            $this->image_lib->initialize($config_crop);


            if ( ! $this->image_lib->resize())
            {
                echo $this->image_lib->display_errors(); 
            }

        }
        $image_thumb = $this->s3_model->upload_image('thumb_'.$img_name['name'] ,$config['upload_path'] . $data_image['file_name']);
        if($image_thumb){
            $result = $this->s3_model->upload_image($img_name['name'] ,$img_name['tmp_name']);
            //unlink($config['upload_path'] . $data_image['file_name']);
        }


        if(! $result){
            $flag = false; //Error in uploading image.
            break;
        }
    }


}