Dnt allow user to access document from url - php

Question

I want the log in user can access the PDF file and anonymous user can not access the file from browser like www.domain.com/pdf/name.pdf
My pdf file is getting corrupted.It is gets failed when clicked for download.
I have created pdf folder in that kept my all pdf.
I have html code
<ul>
<li>
Test
</li>
</ul>
check.php file
if($_SESSION[login]==true){
$file_url = 'http://domainname.com/pdf/example.pdf';
$filename='example.pdf';
header("Content-Disposition: attachment; filename=" . urlencode($filename));
header("Content-Type: application/octet-stream");
header("Content-Type: application/download");
header("Content-Description: File Transfer");
header("Content-Length: " . filesize($file_url));
$fp = fopen($file_url, "r");
while (!feof($fp))
{
echo fread($fp, 65536);
flush(); // this is essential for large downloads
}
fclose($fp);
}
ht.access
RewriteEngine on
RewriteRule .* check.php

Answer 1

Just add a function in your php file as below:
function protect_page(){
if(logged_in()===false){
header('Location: protected.php');
exit();
}
}
Check whether the user is logged in by doing
$_SESSION[login]==true
Write the above protect_page() function on the page that has link to your pdf.
And you're good to go.