class.format.php

        case 'short':
            return Format::date($this->date, $this->fromdb, false, $this->timezone, $this->user);
        case 'long':
            return Format::datetime($this->date, $this->fromdb, $this->timezone, $this->user);
        case 'time':
            return Format::time($this->date, $this->fromdb, false, $this->timezone, $this->user);
        case 'full':
            return Format::daydatetime($this->date, $this->fromdb, $this->timezone, $this->user);
        }
    }

    function __toString() {
        return $this->asVar() ?: '';
    }

    static function getVarScope() {
        return array(
            'full' => 'Expanded date, e.g. day, month dd, yyyy',
            'long' => 'Date and time, e.g. d/m/yyyy hh:mm',
            'short' => 'Date only, e.g. d/m/yyyy',
            'time' => 'Time only, e.g. hh:mm',
        );
    }
}

class FormattedDate
extends FormattedLocalDate {
    function asVar() {
        return $this->getVar('system')->asVar();
    }

    function __toString() {
        global $cfg;

        $timezone = new DatetimeZone($this->timezone ?:
                $cfg->getTimezone());
        $options = array(
                'timezone'  => $timezone->getName(),
                'fromdb'    => $this->fromdb,
                'format'    => $this->format
                );

        $val = (string) new FormattedLocalDate($this->date, $options);
        if ($this->timezone && $this->format == 'long') {
            try {
                $this->datetime->setTimezone($timezone);
                $val = sprintf('%s %s',
                        $val, $this->datetime->format('T'));

            } catch(Exception $ex) {
                // ignore
            }
        }

        return $val;
    }

    function getVar($what, $context=null) {
        global $cfg;

        if ($rv = parent::getVar($what, $context))
            return $rv;

        switch ($what) {
        case 'user':
            // Fetch $recipient from the context and find that user's time zone
            if ($context && ($recipient = $context->getObj('recipient'))) {
                $options = array(
                        'timezone' => $recipient->getTimezone() ?: $cfg->getDefaultTimezone(),
                        'user' => $recipient
                        );
                return new FormattedLocalDate($this->date, $options);
            }
            // Don't resolve the variable until correspondance is sent out
            return false;
        case 'system':
            return new FormattedLocalDate($this->date, array(
                        'timezone' => $cfg->getDefaultTimezone()
                        )
                    );
        }
    }

    function getHumanize() {
        return Format::relativeTime(Misc::db2gmtime($this->date));
    }

    static function getVarScope() {
        return parent::getVarScope() + array(
            'humanize' => 'Humanized time, e.g. about an hour ago',
            'user' => array(
                'class' => 'FormattedLocalDate', 'desc' => "Localize to recipient's time zone and locale"),
            'system' => array(
                'class' => 'FormattedLocalDate', 'desc' => 'Localize to system default time zone'),
        );
    }
}
?>