IMP_Message_Date::_buildCache PHP Méthode

    private function _buildCache()
    {
        if (!isset(self::$_cache['today_start'])) {
            $date = new DateTime('today');
            self::$_cache['today_start'] = $date->format('U');
            $date = new DateTime('today + 1 day');
            self::$_cache['today_end'] = $date->format('U');
            $date = new DateTime('today - 1 day');
            self::$_cache['yesterday_start'] = $date->format('U');
        }
    }