兼容ie6浏览器的php下载文件代码分享

$filename = "./".$_REQUEST[name]; //这里是枫哥具体路径,只要$filename是所要下载文件的完整路径就可以.
if (!is_file($filename)) {//检测文件是否存在.
 die(下载的文件好像跟TM谁私奔啦!);
}
$filepath = str_replace(\\, /, realpath($filename));
$filesize = filesize($filepath);
$filename = substr(strrchr(/.$filepath, /), 1);
$extension = strtolower(substr(strrchr($filepath, .), 1));
       // use this unless you want to find the mime type based on extension,文件后缀格式,不解释.
$mime = array(application/octet-stream);
header(Content-Type: .$mime);
header(Content-Disposition: attachment; filename=".$filename.");
header(Content-Transfer-Encoding: binary);
header(Content-Length: .sprintf(%d, $filesize));
header(Expires: 0);
// check for IE only headers,坑爹的IE检测,你懂的.
if (isset($_SERVER[HTTP_USER_AGENT]) &&((strpos($_SERVER[HTTP_USER_AGENT], MSIE) !== false)))
{
 header(Cache-Control: must-revalidate, post-check=0, pre-check=0);
 header(Pragma: public);
}
else
{
 header(Pragma: no-cache);
}
$handle = fopen($filepath, rb);
fpassthru($handle);
fclose($handle);