php excel在ie 下显示乱码问题

// **** 下面的$title 是要导出的文件名称 $ua = $_SERVER["HTTP_USER_AGENT"]; if (strpos($ua,'MSIE')!==false || strpos($ua,'rv:11.0')) { header('Content-Disposition: attachment; filename="' . urlencode($title) . '"'.".xlsx"); } else { header('Content-Disposition: attachment;filename='.$title.".xlsx"); }