php文件下载的实现，header

php文件下载的实现（header）

$file_xls=$path; // 文件的保存路径

$example_name=basename($file_xls); //获取文件名

header('Content-Description: File Transfer');

header('Content-Type: application/octet-stream');

header('Content-Disposition: attachment; filename='.mb_convert_encoding($example_name,"gb2312","utf-8")); //转换文件名的编码

header('Content-Transfer-Encoding: binary');

header('Expires: 0');

header('Cache-Control: must-revalidate, post-check=0, pre-check=0');

header('Pragma: public');

header('Content-Length: ' . filesize($file_xls));

ob_clean();

flush();

readfile($file_xls);