global $wpdb;

		$limit_clause = $limit < 1 ? '' : "LIMIT 0, {$limit}";

		// phpcs:disable WordPress.DB.PreparedSQL.InterpolatedNotPrepared
		$res = $wpdb->get_results(
			$wpdb->prepare(
				"SELECT * FROM {$wpdb->prefix}lifterlms_user_postmeta
					WHERE meta_key = %s AND user_id = %d ORDER BY {$order_by} {$order} {$limit_clause};",
				'_favorite',
				get_current_user_id()
			)
		);

		return empty( $res ) ? false : $res;

	}

	/**
	 * Retrieve IDs of courses a user has completed
	 *
	 * @param  array $args query arguments
	 *                      @arg int    $limit    number of courses to return
	 *                      @arg string $orderby  table reference and field to order results by
	 *                      @arg string $order    result order (DESC, ASC)
	 *                      @arg int    $skip     number of results to skip for pagination purposes
	 * @return array        "courses" will contain an array of course ids
	 *                      "more" will contain a boolean determining whether or not more courses are available beyond supplied limit/skip criteria
	 * @since   ??
	 * @version 3.24.0
	 */
	public function get_completed_courses( $args = array() ) {

		global $wpdb;

		$args = array_merge(
			array(
				'limit'   => 20,
				'orderby' => 'upm.updated_date',
				'order'   => 'DESC',
				'skip'    => 0,
			),
			$args
		);

		// Add one to the limit to see if there's pagination.
		$args['limit']++;

		// phpcs:disable WordPress.DB.PreparedSQL.InterpolatedNotPrepared
		$q = $wpdb->get_results(
			$wpdb->prepare(
				"SELECT upm.post_id AS id
			 FROM {$wpdb->prefix}lifterlms_user_postmeta AS upm
			 JOIN {$wpdb->posts} AS p ON p.ID = upm.post_id
			 WHERE p.post_type = 'course'
			   AND upm.meta_key = '_is_complete'
			   AND upm.meta_value = 'yes'
			   AND upm.user_id = %d
			 ORDER BY {$args['orderby']} {$args['order']}
			 LIMIT %d, %d;
			",
				array(