php导出excel出现乱码怎么办

foreach ($licenseList as $key => $item) {
 $objPHPExcel->setActiveSheetIndex(0)
 ->setCellValue('A' . ($key + 2), $item["company_name"])
 ->setCellValue('B' . ($key + 2), $item["user_name"])
 ->setCellValue('C' . ($key + 2), $item["order_number"])
 ->setCellValue('D' . ($key + 2), $item['apply_type']==2 ? 'official':'trial')
 ->setCellValue('E' . ($key + 2), $item["license_key"])
 ->setCellValue('F' . ($key + 2), $statusArr[$item['license_status']])->setCellValue('G' . ($key + 2), $item["user_email"])
 ->setCellValue('H' . ($key + 2), date('y/m/d H:i:s', strtotime($item['insert_time'])));
 }

 $objPHPExcel->getActiveSheet()->setTitle('Simple');
 $objPHPExcel->setActiveSheetIndex(0);
 ob_end_clean();//解决乱码核心 就在此处添加此函数
 header('Content-Type: application/vnd.ms-excel');
 header('Content-Disposition: attachment;filename="test_list.xls"');
 header('Cache-Control: max-age=0');
 header('Cache-Control: max-age=1');
 header('Expires: Mon, 26 Jul 1997 05:00:00 GMT');
 header('Last-Modified: ' . gmdate('D, d M Y H:i:s') . ' GMT');
 header('Cache-Control: cache, must-revalidate');
 header('Pragma: public');

 $objWriter = PHPExcel_IOFactory::createWriter($objPHPExcel, 'Excel5');
 $objWriter->save('php://output');
 exit;