Something

		$date_of_birth = db::escape($date_of_birth);
        
		db::execute("UPDATE user_info
                     SET date_of_birth = '{$date_of_birth}'
                       , bd_year = YEAR('{$date_of_birth}')
                       , bd_month = MONTH('{$date_of_birth}')
                       , bd_day = DAY('{$date_of_birth}')
                       , age = YEAR(CURDATE()) - YEAR('{$date_of_birth}') - (RIGHT(CURDATE(), 5) < RIGHT('{$date_of_birth}', 5))
                     WHERE user_id = {$uid} LIMIT 1");