CodeIgniter框架下载辅助函数的一个小bug

        if (strpos($_SERVER['HTTP_USER_AGENT'], "MSIE") !== FALSE){header('Content-Type: '.$mime); // <---1)这里header('Content-Disposition: attachment; filename="'.$filename.'"');header('Expires: 0');header('Cache-Control: must-revalidate, post-check=0, pre-check=0');header("Content-Transfer-Encoding: binary");header('Pragma: public');header("Content-Length: ".strlen($data));}else{header('Content-Type: '.$mime); // <---2)这里header('Content-Disposition: attachment; filename="'.$filename.'"');header("Content-Transfer-Encoding: binary");header('Expires: 0');header('Pragma: no-cache');header("Content-Length: ".strlen($data));}

修改前代码：

        if (strpos($_SERVER['HTTP_USER_AGENT'], "MSIE") !== FALSE){header('Content-Type: "'.$mime.'"');header('Content-Disposition: attachment; filename="'.$filename.'"');header('Expires: 0');header('Cache-Control: must-revalidate, post-check=0, pre-check=0');header("Content-Transfer-Encoding: binary");header('Pragma: public');header("Content-Length: ".strlen($data));}else{header('Content-Type: "'.$mime.'"');header('Content-Disposition: attachment; filename="'.$filename.'"');header("Content-Transfer-Encoding: binary");header('Expires: 0');header('Pragma: no-cache');header("Content-Length: ".strlen($data));}