File Upload

class UtilController extends Controller {

    function updateshowPosterImage() {

        $Page = Page::get()->filter("ID","17633")->First();
        if(!$Page->BannerImageID) {
            $page_name = $Page->MenuTitle;
            $file_name = 'banner-image-'.$show_name.'.jpg';
            $file_path = $themeFolder.'/images/page/banner/'.$file_name;
            $file_upload_path = sprintf("%s/page/banner",Config::inst()->get('Upload', 'uploads_folder'));
            if (!file_exists(ASSETS_PATH . DIRECTORY_SEPARATOR . $file_upload_path)) {
                    mkdir(ASSETS_PATH . DIRECTORY_SEPARATOR . $file_upload_path, 0777, true);
            }
            $file_upload_file =  $file_upload_path . DIRECTORY_SEPARATOR .$file_name;
            $file_contents = '';
            set_error_handler(function($errno, $errstr, $errfile, $errline, array $errcontext) {
                // error was suppressed with the @-operator
                if (0 === error_reporting()) {
                return false;
                }

                throw new ErrorException($errstr, 0, $errno, $errfile, $errline);
            });

            try {
                if (Director::fileExists($file_path)) {
                    $uploadImage = function() use ($file_name, $file_upload_file,$file_path ) {
                        if(!file_exists(ASSETS_PATH . DIRECTORY_SEPARATOR. $file_upload_file)) {
                            copy(BASE_PATH . DIRECTORY_SEPARATOR . $file_path, ASSETS_PATH . DIRECTORY_SEPARATOR. $file_upload_file);
                        }
                        // emulates the $_FILES array
                        $fileconfig = array(
                            'name' => $file_name,
                            'type' => 'text/plaintext',
                            'size' => filesize(ASSETS_PATH . DIRECTORY_SEPARATOR . $file_upload_file),
                            'tmp_name' => ASSETS_PATH . DIRECTORY_SEPARATOR . $file_upload_file,
                            'extension' => 'jpg',
                            'error' => UPLOAD_ERR_OK,
                        );

                        //test upload into default folder
                        $upload = new Upload();
                        $upload->validate($fileconfig);
                        $upload->validator->setAllowedExtensions(array('jpg'));
                        $upload->load($fileconfig);
                        Debug::show($upload->getErrors());
                        return $upload->getFile();
                    };
                    $image = $uploadImage();
                    Debug::show($image);

                }
            } catch(Exception $e) {
                Debug::show($e->getMessage());
            }
        }
    }

}