PHP IE中下载附件问题解决方法

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。
<div class="codetitle"><a style="CURSOR: pointer" data="88334" class="copybut" id="copybut88334" onclick="doCopy('code88334')"> 代码如下:<div class="codebody" id="code88334">
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
<div class="codetitle"><a style="CURSOR: pointer" data="80048" class="copybut" id="copybut80048" onclick="doCopy('code80048')"> 代码如下:<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;

（编辑：李大同）

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