Getting subs for known product IDs

get_subs_by_products.php

<?php
// for troubleshooting specific site. 

add_action( 'wp', 'get_subs_by_products' );
function get_subs_by_products() {
  $product_ids = array(39002, 39001, 27181, 26017, 73821, 4178);
  $subscriptions = wcs_get_subscriptions( array( 'product_id' => $product_ids, 'subscriptions_per_page' => -1, 'subscription_status'    => array( 'wc-active', 'wc-on-hold' ) ) );

  $number_of_subs = count($subscriptions);

  $log = new WC_Logger();
  $log_entry = 'Subs count for existing products: ' . print_r( $number_of_subs, true );
  $log->add( 'wcs-troubleshooting-log', $log_entry );
}