I was updating my XAMPP htdocs folder on my 3rd computer at my office (I had to change because of defects and upgrades), when I realized that my old works was not in my current htdocs folder. I decided to copy the old files into my new folder and when I checked it on a browser I forgot that the DB files are not yet imported. I searched for automatic and manual methods, but then I found nothing(Or at least I thought, I usually eye the first 3-5 results on Google). And so, what I did was, I browsed every folder on XAMPP that would give me hints what to do.
Until I reached the 'mysql' (In terms of common sense you would go first with 'phpmyadmin' and 'mysql') then I found folders inside /xampp/mysql/data that are named as what my old DB's were.
I copied these specific folders pasted them into the same folder on the current xampp folder, then Voilà! You can now check your phpMyAdmin and see your old DBs listed on the left sidebar.