public function actionExcel() {
        Yii::import('application.vendors.*');
        require_once('PHPExcel.php');

        $objPHPExcel = new PHPExcel();

        $objPHPExcel->setActiveSheetIndex(0)
        ->setCellValue('A1', 'Hello')
        ->setCellValue('B2', 'world!')
        ->setCellValue('C1', 'Hello')
        ->setCellValue('D2', 'world!');

        $objPHPExcel->setActiveSheetIndex(0)
        ->setCellValue('A4', 'Miscellaneous glyphs')
        ->setCellValue('A5', 'eaeuaeioueiuyaouc');

        $objPHPExcel->getActiveSheet()->setTitle('Simple');

        $objPHPExcel->setActiveSheetIndex(0);

        ob_end_clean();
        ob_start();

        header('Content-Type: application/vnd.ms-excel');
        header('Content-Disposition: attachment;filename="test.xls"');
        header('Cache-Control: max-age=0');
        $objWriter = PHPExcel_IOFactory::createWriter($objPHPExcel, 'Excel5');
        $objWriter->save('php://output');
}