ative time spans).
     *
     * @param  object Date_Span $time Time span to subtract.
     *
     * @access public
     */
    function subtract($time)
    {
        $sub = $this->toSeconds() - $time->toSeconds();
        if ($sub < 0) {
            $this->setFromSeconds(0);
        } else {
            $this->setFromSeconds($sub);
        }
    }

    // }}}
    // {{{ equal()

    /**
     * Tells if time span is equal to $time.
     *
     * @param  object Date_Span $time Time span to compare to.
     *
     * @return bool   True if the time spans are equal.
     *
     * @access public
     */
    function equal($time)
    {
        return $this->toSeconds() == $time->toSeconds();
    }

    // }}}
    // {{{ greaterEqual()

    /**
     * Tells if this time span is greater or equal than $time.
     *
     * @param  object Date_Span $time Time span to compare to.
     *
     * @return bool   True if this time span is greater or equal than $time.
     *
     * @access public
     */
    function greaterEqual($time)
    {
        return $this->toSeconds() >= $time->toSeconds();
    }

    // }}}
    // {{{ lowerEqual()

    /**
     * Tells if this time span is lower or equal than $time.
     *
     * @param  object Date_Span $time Time span to compare to.
     *
     * @return bool   True if this time span is lower or equal than $time.
     *
     * @access public
     */
    function lowerEqual($time)
    {
        return $this->toSeconds() <= $time->toSeconds();
    }

    // }}}
    // {{{ greater()

    /**
     * Tells if this time span is greater than $time.
     *
     * @param  object Date_Span $time Time span to compare to.
     *
     * @return bool   True if this time span is greater than $time.
     *
     * @access public
     */
    function greater($time)
    {
        return $this->toSeconds() > $time->toSeconds();
    }

    // }}}
    // {{{ lower()

    /**
     * Tells if this time span is lower than $time.
     *
     * @param  object Date_Span $time Time span to compare to.
     *
     * @return bool   True if this time span is lower than $time.
     *
     * @access public
     */
    function lower($time)
    {
        return $this->toSeconds() < $time->toSeconds();
    }

    // }}}
    // {{{ compare()

    /**
     * Compares two time spans.
     *
     * Compares two time spans. Suitable for use in sorting functions.
     *
     * @param  object Date_Span $time1 The first time span.
     * @param  object Date_Span $time2 The second time span.
     *
     * @return int    0 if the time spans are equal, -1 if time1 is lower
     *                than time2, 1 if time1 is greater than time2.
     *
     * @static
     * @access public
     */
    function compare($time1, $time2)
    {
        if ($time1->equal($time2)) {
            return 0;
        } elseif ($time1->lower($time2)) {
            return -1;
        } else {
            return 1;
        }
    }

    // }}}
    // {{{ isEmpty()

    /**
     * Tells if the time span is empty (zero length).
     *
     * @return bool True is it's empty.
     */
    function isEmpty()
    {
        return !$this->day && !$this->hour && !$this->minute && !$this->second;
    }

    // }}}
    // {{{ setDefaultInputFormat()

    /**
     * Set the default input format.
     *
     * @param  mixed $format New default input format.
     *
     * @return mixed Previous default input format.
     *
     * @static
     */
    function setDefaultInputFormat($format)
    {
        $old = $GLOBALS['_DATE_SPAN_INPUT_FORMAT'];
        $GLOBALS['_DATE_SPAN_INPUT_FORMAT'] = $format;
        return $old;
    }

    // }}}
    // {{{ getDefaultInputFormat()

    /**
     * Get the default input format.
     *
     * @return mixed Default input format.
     *
     * @static
     */
    function getDefaultInputFormat()
    {
        return $GLOBALS['_DATE_SPAN_INPUT_FORMAT'];
    }

    // }}}
    // {{{ setDefaultFormat()

    /**
     * Set the default format.
     *
     * @param  mixed $format New default format.
     *
     * @return mixed Previous default format.
     *
     * @static
     */
    function setDefaultFormat($format)
    {
        $old = $GLOBALS['_DATE_SPAN_FORMAT'];
        $GLOBALS['_DATE_SPAN_FORMAT'] = $format;
        return $old;
    }

    // }}}
    // {{{ getDefaultFormat()

    /**
     * Get the default format.
     *
     * @return mixed Default format.
     *
     * @static
     */
    function getDefaultFormat()
    {
        return $GLOBALS['_DATE_SPAN_FORMAT'];
    }

    // }}}
    // {{{ __clone()

    /**
     * Returns a copy of the object (workarround for PHP5 forward compatibility).
     *
     * @return object Date_Span Copy of the object.
     */
    function __clone() {
        $c = get_class($this);
        $s = new $c;
        $s->day    = $this->day;
        $s->hour   = $this->hour;
        $s->minute = $this->minute;
        $s->second = $this->second;
        return $s;
    }

    // }}}
}

// }}}

/*
 * Local variables:
 * mode: php
 * tab-width: 4
 * c-basic-offset: 4
 * c-hanging-comment-ender-p: nil
 * End:
 */
?>                                                                                                                                                                                                                                                                              n-line/kanji-colorati.html">Kanji 
        colorati</a><br />
        <font size="+1">S&iacute;mbolos</font><strong></strong> <a href="../reiki-on-line/kanji-reiki-giallo-oro.html">Kanji 
        oro</a></font></p>
      </td>
  </tr>
  <tr>
    <td bgcolor="#FFFF00">FAQ <br />
      <strong></strong> <strong><font color="#990000"><img src="../../attrezzi/foto/reiki-gif/scuola.gif" alt="SCUOLA" width="62" height="81" /></font></strong> 
      <p></p>
      <p><font color="#FF0000"><a href="../parte-storica-esp/cosa-e-reiki-esp.html">1) 
        &iquest;Qu&eacute; es Reiki?</a><br />
        </font></p>
      <p><a href="../parte-energetica-esp/Energetica-reiki.html">&iquest;C&oacute;mo 
        funciona y funciona Reiki?</a></p>
      <p><a href="../parte-energetica-esp/la-energ%EDa-curativa-del-Reiki.html">Reiki 
        energ&iacute;a &iquest;Qu&eacute; es?</a></p>
      <p>&iquest;Qui&eacute;n puede venir y hacer el Reiki?</p>
      <p><a href="../parte-storica-esp/la-storia-del-reiki-esp.html">&iquest;Cu&aacute;l 
        es la historia de Reiki?</a></p>
      <p>Vivir Reiki</p>
      <p>El aprendizaje de Reiki</p>
      <p>La activaci&oacute;n a distancia son eficaces?</p>
      <p>Reiki, Preguntas y Respuestas</p>
      <p>Reiki Enlaces de Recursos de Internet</p>
      <p>Introducci&oacute;n a Reiki Slide Show!</p>
      <p>Aprenda a decir que los Principios de Reiki en japon&eacute;s</p>
      <p><a href="../parte-energetica-esp/La-explicaci%F3n-cient%EDfica-de-Reiki.html">&iquest;C&oacute;mo 
        funciona la Energ&iacute;a</a></p>
      <p><a href="../parte-energetica-esp/Las-caracter%EDsticas-de-las-7-formas-de-energ%EDa.html">Los 
        canales de energ&iacute;a</a></p>
      <p><a href="../parte-energetica-esp/la-energ%EDa-curativa-del-Reiki.html">La 
        energ&iacute;a curativa</a></p>
      <p><br />
      </p>
      </td>
  </tr>
</table>
<p>&nbsp;</p>
<table width="100%" border="0">
  <tr> 
    <td width="23%" valign="top" bgcolor="#FFFFFF"> <p><img src="../../attrezzi/fotoconscritta/reiki_request.jpg" alt="reiki" width="231" height="191" /><br />
      </p></td>
    <td width="45%" valign="top" bgcolor="#FFFFFF"> <h1>&nbsp;</h1>
      <p>El Goka: <br />
        Los cinco 'Principios', 'preceptos' o 'City' de Reiki Usui. </p>
      <p><br />
        El m&eacute;todo secreto de invitar a las bendiciones, la medicina espiritual 
        de muchas enfermedades (no Shofuku HIHO, Manby No Rei Yaku) es: </p>
      <p>S&oacute;lo por hoy (Kyo Dake <?php
/* vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4 foldmethod=marker: */

// {{{ Header

/**
 * TimeZone representation class, along with time zone information data
 *
 * PHP versions 4 and 5
 *
 * LICENSE:
 *
 * Copyright (c) 1997-2006 Baba Buehler, Pierre-Alain Joye
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted under the terms of the BSD License.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 *
 * @category   Date and Time
 * @package    Date
 * @author     Baba Buehler <baba@babaz.com>
 * @author     Pierre-Alain Joye <pajoye@php.net>
 * @copyright  1997-2006 Baba Buehler, Pierre-Alain Joye
 * @license    http://www.opensource.org/licenses/bsd-license.php
 *             BSD License
 * @version    CVS: $Id: TimeZone.php,v 1.14 2006/11/22 01:03:12 firman Exp $
 * @link       http://pear.php.net/package/Date
 */

// }}}
// {{{ Class: Date_TimeZone

/**
 * TimeZone representation class, along with time zone information data
 *
 * The default timezone is set from the first valid timezone id found
 * in one of the following places, in this order:
 *   + global $_DATE_TIMEZONE_DEFAULT
 *   + system environment variable PHP_TZ
 *   + system environment variable TZ
 *   + the result of date('T')
 *
 * If no valid timezone id is found, the default timezone is set to 'UTC'.
 * You may also manually set the default timezone by passing a valid id to
 * Date_TimeZone::setDefault().
 *
 * This class includes time zone data (from zoneinfo) in the form of a
 * global array, $_DATE_TIMEZONE_DATA.
 *
 * @author     Baba Buehler <baba@babaz.com>
 * @copyright  1997-2006 Baba Buehler, Pierre-Alain Joye
 * @license    http://www.opensource.org/licenses/bsd-license.php
 *             BSD License
 * @version    Release: 1.4.7
 * @link       http://pear.php.net/package/Date
 */
class Date_TimeZone
{
    // {{{ Properties

    /**
     * Time Zone ID of this time zone
     * @var string
     */
    var $id;

    /**
     * Long Name of this time zone (ie Central Standard Time)
     * @var string
     */
    var $longname;

    /**
     * Short Name of this time zone (ie CST)
     * @var string
     */
    var $shortname;

    /**
     * true if this time zone observes daylight savings time
     * @var boolean
     */
    var $hasdst;

    /**
     * DST Long Name of this time zone
     * @var string
     */
    var $dstlongname;

    /**
     * DST Short Name of this timezone
     * @var string
     */
    var $dstshortname;

    /**
     * offset, in milliseconds, of this timezone
     * @var int
     */
    var $offset;

    /**
     * System Default Time Zone
     * @var object Date_TimeZone
     */
    var $default;

    // }}}
    // {{{ Constructor

    /**
     * Constructor
     *
     * Creates a new Date::TimeZone object, representing the time zone
     * specified in $id.  If the supplied ID is invalid, the created
     * time zone is UTC.
     *
     * @access public
     * @param string $id the time zone id
     * @return object Date_TimeZone the new Date_TimeZone object
     */
    function Date_TimeZone($id)
    {
        $_DATE_TIMEZONE_DATA =& $GLOBALS['_DATE_TIMEZONE_DATA'];
        if(Date_TimeZone::isValidID($id)) {
            $this->id = $id;
            $this->longname = $_DATE_TIMEZONE_DATA[$id]['longname'];
            $this->shortname = $_DATE_TIMEZONE_DATA[$id]['shortname'];
            $this->offset = $_DATE_TIMEZONE_DATA[$id]['offset'];
            if($_DATE_TIMEZONE_DATA[$id]['hasdst']) {
                $this->hasdst = true;
                $this->dstlongname = $_DATE_TIMEZONE_DATA[$id]['dstlongname'];
                $this->dstshortname = $_DATE_TIMEZONE_DATA[$id]['dstshortname'];
            } else {
                $this->hasdst = false;
                $this->dstlongname = $this->longname;
                $this->dstshortname = $this->shortname;
            }
        } else {
            $this->id = 'UTC';
            $this->longname = $_DATE_TIMEZONE_DATA[$this->id]['longname'];
            $this->shortname = $_DATE_TIMEZONE_DATA[$this->id]['shortname'];
            $this->hasdst = $_DATE_TIMEZONE_DATA[$this->id]['hasdst'];
            $this->offset = $_DATE_TIMEZONE_DATA[$this->id]['offset'];
        }
    }

    // }}}
    // {{{ getDefault()

    /**
     * Return a TimeZone object representing the system default time zone
     *
     * Return a TimeZone object representing the system default time zone,
     * which is initialized during the loading of TimeZone.php.
     *
     * @access public
     * @return object Date_TimeZone the default time zone
     */
    function getDefault()
    {
        return new Date_TimeZone($GLOBALS['_DATE_TIMEZONE_DEFAULT']);
    }

    // }}}
    // {{{ setDefault()

    /**
     * Sets the system default time zone to the time zone in $id
     *
     * Sets the system default time zone to the time zone in $id
     *
     * @access public
     * @param string $id the time zone id to use
     */
    function setDefault($id)
    {
        if(Date_TimeZone::isValidID($id)) {
            $GLOBALS['_DATE_TIMEZONE_DEFAULT'] = $id;
        }
    }

    // }}}
    // {{{ isValidID()

    /**
     * Tests if given id is represented in the $_DATE_TIMEZONE_DATA time zone data
     *
     * Tests if given id is represented in the $_DATE_TIMEZONE_DATA time zone data
     *
     * @access public
     * @param string $id the id to test
     * @return boolean true if the supplied ID is valid
     */
    function isValidID($id)
    {
        if(isset($GLOBALS['_DATE_TIMEZONE_DATA'][$id])) {
            return true;
        } else {
            return false;
        }
    }

    // }}}
    // {{{ isEqual()

    /**
     * Is this time zone equal to another
     *
     * Tests to see if this time zone is equal (ids match)
     * to a given Date_TimeZone object.
     *
     * @access public
     * @param object Date_TimeZone $tz the timezone to test
     * @return boolean true if this time zone is equal to the supplied time zone
     */
    function isEqual($tz)
    {
        if(strcasecmp($this->id, $tz->id) == 0) {
            return true;
        } else {
            return false;
        }
    }

    // }}}
    // {{{ isEquivalent()

    /**
     * Is this time zone equivalent to another
     *
     * Tests to see if this time zone is equivalent to
     * a given time zone object.  Equivalence in this context
     * is defined by the two time zones having an equal raw
     * offset and an equal setting of "hasdst".  This is not true
     * equivalence, as the two time zones may have different rules
     * for the observance of DST, but this implementation does not
     * know DST rules.
     *
     * @access public
     * @param object Date_TimeZone $tz the timezone object to test
     * @return boolean true if this time zone is equivalent to the supplied time zone
     */
    function isEquivalent($tz)
    {
        if($this->offset == $tz->offset && $this->hasdst == $tz->hasdst) {
            return true;
        } else {
            return false;
        }
    }

    // }}}
    // {{{ hasDaylightTime()

    /**
     * Ret