Retrieve the data from MySQL database and execute algorithm with PHP

It's a WordPress website, and here is the algorithm for PHP script that needs to be executed within particular .php file: 1. Check if WordPress user membership level is "dolphin": <?php if(woocommerce_members_only(array("dolphin"))): ?> ...do the rest <?php endif; ?> 2. Get user ID (X) 3. Get user membership start/end dates from: Table 1: wp_usermeta Columns: - user_id : X - meta_key : _rpwcm_dolphin_expires (start date) AND _rpwcm_dolphin_since (end date) - meta_value : 1516901635 4. Count number of rows where column "timestamp" is >= start date AND <= end date Table 2: wp_ahm_download_stats Columns: - user_id : X - timestamp: 1514392796 5. Save the value (number) to variable and echo it. That's it :) Deadline: 2 days.