Return the latest quiz result items

/**
 * LearnDash Utility function to return the latest quiz result items
 * @param int $quiz_id The Quiz ID Post to return
 * @param int $user_id The specific user ID. Optional. Will use current user if not set.
 * @return array the attay of quiz information. Will look something like:
 *	Array(
 *		[quiz] => 49
 *		[score] => 1
 *		[count] => 1
 *		[question_show_count] => 1
 *		[pass] => 1
 *		[rank] => -
 *		[time] => 1490300513
 *		[pro_quizid] => 3
 *		[points] => 1
 *		[total_points] => 1
 *		[percentage] => 100
 *		[timespent] => 2.116
 *		[has_graded] => 
 *		[statistic_ref_id] => 1
 *		[started] => 1490300510
 *		[completed] => 1490300512
 *	)
 */
function learndash_get_latest_quiz_results( $quiz_id = 0, $user_id = 0 ) {
	if ( !empty( $quiz_id ) ) {
		if ( empty( $user_id ) ) {
			if ( is_user_logged_in() ) {
				$user_id = get_current_user_id();
			}
		}

		if ( !empty( $user_id ) ) {
			
			$user_quizzes = get_user_meta( $user_id, '_sfwd-quizzes', true );
			krsort( $user_quizzes );
			foreach( $user_quizzes as $user_quiz ) {
				if ( $user_quiz['quiz'] == $quiz_id ) {
					return $user_quiz;
				}
			}
		}
	}
}