使用PHP强制下载PDF文件示例_php技巧

WBOY
Release: 2016-05-17 08:50:57
Original
959 people have browsed it

我们有时会遇到这样一种情况,当需要下载一个PDF文件时,如果不经处理会直接在浏览器里打开PDF文件,然后再需要通过另存为才能保存下载文件。本文将通过PHP来实现直接下载PDF文件。

实现原理:我们仅仅只需要修改页面HTTP头,把Content-Type设置为force-download,问题即可解决。

请看代码:

复制代码 代码如下:

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);;
}

为了方便,我写了一个函数forceDownload(),然后通过调用该函数即可。
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