if( stripos($_SERVER['HTTP_USER_AGENT'], 'MSIE')!==false )

　　$filename = urlencode( $filename );

// 输入文件标签

Header("Content-Type: application/vnd.android.package-archive");

Header("Accept-Ranges: bytes");

Header("Accept-Length: ".filesize($file_path));

Header("Content-Disposition: attachment; filename=" . $filename );

// 输出文件内容

echo fread($file,filesize($file_path));

fclose($file);

如果当前浏览器是ie, 需要对包含中文的文件名进行urlencode编码