在IE中下载附件之前要清空缓存、中文文件名要用urlencode编码，下面有个不错的示例，需要的朋友可以参考下

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。  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  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;