<div class="codebody" id="code80048">
header('Content-Description: File Transfer');
header('Content-Type: application/octet-stream');
header('Content-Disposition: attachment; filename='.urlencode(basename($file) )); //IE中不用urlencode中文名会出现乱码
header('Content-Transfer-Encoding: binary'); //二进制传输
header('Expires: 0');
header('Cache-Control: must-revalidate,post-check=0,pre-check=0'); //不加的话，IE中会提示目标主机无法访问
header('Pragma: public'); //不加的话，IE中会提示目标主机无法访问
header('Content-Length: ' . filesize($file));
ob_clean();
flush();
readfile($file);
exit;