重点： 1、在IE中下载附件之前要清空缓存。 2、中文文件名要用urlencode编码。
复制代码 代码如下:
Header("Pragma: "); //不加的话，IE中会提示目标主机无法访问
Header("Cache-Control: "); //不加的话，IE中会提示目标主机无法访问
Header("content-type: $type");
Header("accept-ranges: bytes");
Header("Content-Transfer-Encoding:base64");
Header("accept-length: " . filesize($path_c));
Header("content-disposition: attachment; filename=" .urlencode($filename)); //IE中不用urlencode中文名会出现乱码
readfile($path_c);
exit;

或
复制代码 代码如下:
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;