get user liked posts (IDs) with plugin (WP Ulike)

ulike_user_liked_posts.php

<?php
function dw_get_posts_liked_by_user( $user_ID = '' ) {
	if ( function_exists( 'wp_ulike' ) ) {
		global $wpdb;
		$result = array();
		if ( ! $user_ID ) {
			$user_ID = get_current_user_id();
		}
		$likes = $wpdb->get_results( "
							SELECT U.post_id 
							FROM " . $wpdb->prefix . "ulike AS U
							WHERE  U.user_id = $user_ID AND U.status = 'like'
							GROUP BY U.post_id
							ORDER BY MAX(U.date_time) DESC
						" );
		if ( $likes !== 0 ) {
			foreach ( $likes as $like ) {
				$result[] = $like->post_id;
			}
		}

		return $result;
	} else {
		return false;
	}
}