求助，代码如下，在输出文件时出现乱码：

public function download(){
Loader::import('phpword/PHPWord',EXTEND_PATH);
$phpword=new \PHPWord();
$section=$phpword->createSection();
$section->addText('holleword', array('name'=>'Tahoma', 'size'=>16, 'bold'=>true));
$section->addText('ᠪᠦᠬᠦᠳᠡ ᠨᠡᠶᠢᠷᠡᠮᠳᠡᠬᠤ ᠲᠤᠮᠳᠡᠳᠤ ᠠᠷᠡᠳ ᠤᠯᠤᠰ ᠤᠨ ᠢᠷᠭᠡᠨ ᠤ ᠬᠠᠣᠯᠢ ᠶᠢᠨ ᠶᠡᠷᠦᠩᠭᠡᠢ ᠲᠦᠷᠢᠮ');
$phpword->addFontstyle('mongol', array('name'=>'Verdana', 'size'=>14, 'color'=>'1B2232'));
$section->addText('ᠪᠠᠶᠢᠴᠠᠭᠠᠬᠤ ᠡᠳᠦᠷ  ᠦᠨ ᠰᠣᠨᠢᠨ ᠄ ᠢᠷᠡᠭᠡᠳᠦᠢ  ᠪᠡᠨ ᠬᠠᠯᠠᠮᠵᠢᠯᠠᠵᠤ ᠂ ᠬᠠᠤᠯᠢᠵᠢᠯ  ᠤᠨ ᠪᠢᠴᠢᠯ ᠬᠦᠰᠡᠯ ᠡᠷᠡᠮᠡᠯᠵᠡᠯ  ᠢ ᠴᠢᠨᠢ ᠬᠠᠩᠭᠠᠨᠠᠮ','mongol');
$objWriter =\PHPWord_IOFactory::createWriter($phpword,'Word2007');
header("Content-type: *");
header("Content-Disposition:attachment;filename=testExport.docx");
header('Cache-Control: max-age=0');
$objWriter->save('php://output');

}