本文将通过PHP来实现直接下载PDF文件。
实现原理：只需要修改页面HTTP头，把Content-Type设置为force-download，问题即可解决。
请看代码：
- forceDownload("pdfdemo.pdf");
- function forceDownload($filename) {
- if (false == file_exists($filename)) {
- return false;
- }
- // http headers
- header('Content-Type: application-x/force-download');
- header('Content-Disposition: attachment; filename="' . basename($filename) .'"');
- header('Content-length: ' . filesize($filename));
- // for IE6
- if (false === strpos($_SERVER['HTTP_USER_AGENT'], 'MSIE 6')) {
- header('Cache-Control: no-cache, must-revalidate');
- }
- header('Pragma: no-cache');
- // read file content and output
- return readfile($filename);;
- }