Show uploaded pdf files dynamically and filter by month name

unfortunately, I can’t write comments yet, I don’t have enough reputation.

first, the file path must be absolute.

$filename = __DIR__.'/wp-content/uploads/2020/10/'. $months.'.pdf';

second, does the frontend browser handle file uploads? On JS or something else?

Hata!: SQLSTATE[HY000] [1045] Access denied for user 'divattrend_liink'@'localhost' (using password: YES)