php下载文件的代码示例

<?php
$file = monkey.gif;

if (file_exists($file)) {
header(Content-Description: File Transfer);
header(Content-Type: application/octet-stream);
header(Content-Disposition: attachment; filename=.basename($file));
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($file));
ob_clean();
flush();
readfile($file);
exit;
}
?>

<?php
public function fddAction()
{
// get attachment location
$attachment_location = $_SERVER["DOCUMENT_ROOT"] . "/pdf/fdd/sample.pdf";

if (file_exists($attachment_location)) {
// attachment exists

// send open pdf dialog to user
header(Cache-Control: public); // needed for i.e.
header(Content-Type: application/pdf);
header(Content-Disposition: inline; filename="sample.pdf");
readfile($attachment_location);
die(); // stop execution of further script because we are only outputting the pdf

} else {
die(Error: File not found.);
}
}
?>