2090 lines
68 KiB
PHP
2090 lines
68 KiB
PHP
<?php
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/* vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4 foldmethod=marker: */
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// {{{ Header
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/**
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* Calculates, manipulates and retrieves dates
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*
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* It does not rely on 32-bit system time stamps, so it works dates
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* before 1970 and after 2038.
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*
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* PHP versions 4 and 5
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*
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* LICENSE:
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*
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* Copyright (c) 1999-2006 Monte Ohrt, Pierre-Alain Joye, Daniel Convissor
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted under the terms of the BSD License.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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* @category Date and Time
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* @package Date
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* @author Monte Ohrt <monte@ispi.net>
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* @author Pierre-Alain Joye <pajoye@php.net>
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* @author Daniel Convissor <danielc@php.net>
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* @copyright 1999-2006 Monte Ohrt, Pierre-Alain Joye, Daniel Convissor
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* @license http://www.opensource.org/licenses/bsd-license.php
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* BSD License
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* @version CVS: $Id: Calc.php,v 1.35 2006/11/21 23:01:13 firman Exp $
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* @link http://pear.php.net/package/Date
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* @since File available since Release 1.2
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*/
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// }}}
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if (!defined('DATE_CALC_BEGIN_WEEKDAY')) {
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/**
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* Defines what day starts the week
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*
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* Monday (1) is the international standard.
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* Redefine this to 0 if you want weeks to begin on Sunday.
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*/
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define('DATE_CALC_BEGIN_WEEKDAY', 1);
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}
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if (!defined('DATE_CALC_FORMAT')) {
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/**
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* The default value for each method's $format parameter
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*
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* The default is '%Y%m%d'. To override this default, define
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* this constant before including Calc.php.
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*
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* @since Constant available since Release 1.4.4
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*/
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define('DATE_CALC_FORMAT', '%Y%m%d');
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}
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// {{{ Class: Date_Calc
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/**
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* Calculates, manipulates and retrieves dates
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*
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* It does not rely on 32-bit system time stamps, so it works dates
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* before 1970 and after 2038.
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*
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* @author Monte Ohrt <monte@ispi.net>
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* @author Daniel Convissor <danielc@php.net>
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* @copyright 1999-2006 Monte Ohrt, Pierre-Alain Joye, Daniel Convissor
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* @license http://www.opensource.org/licenses/bsd-license.php
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* BSD License
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* @version Release: 1.4.7
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* @link http://pear.php.net/package/Date
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* @since Class available since Release 1.2
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*/
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class Date_Calc
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{
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// {{{ dateFormat()
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/**
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* Formats the date in the given format, much like strfmt()
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*
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* This function is used to alleviate the problem with 32-bit numbers for
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* dates pre 1970 or post 2038, as strfmt() has on most systems.
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* Most of the formatting options are compatible.
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*
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* Formatting options:
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* <pre>
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* %a abbreviated weekday name (Sun, Mon, Tue)
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* %A full weekday name (Sunday, Monday, Tuesday)
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* %b abbreviated month name (Jan, Feb, Mar)
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* %B full month name (January, February, March)
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* %d day of month (range 00 to 31)
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* %e day of month, single digit (range 0 to 31)
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* %E number of days since unspecified epoch (integer)
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* (%E is useful for passing a date in a URL as
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* an integer value. Then simply use
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* daysToDate() to convert back to a date.)
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* %j day of year (range 001 to 366)
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* %m month as decimal number (range 1 to 12)
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* %n newline character (\n)
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* %t tab character (\t)
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* %w weekday as decimal (0 = Sunday)
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* %U week number of current year, first sunday as first week
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* %y year as decimal (range 00 to 99)
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* %Y year as decimal including century (range 0000 to 9999)
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* %% literal '%'
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* </pre>
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*
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* @param int $day the day of the month
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* @param int $month the month
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* @param int $year the year. Use the complete year instead of the
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* abbreviated version. E.g. use 2005, not 05.
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* Do not add leading 0's for years prior to 1000.
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* @param string $format the format string
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*
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* @return string the date in the desired format
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*
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* @access public
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* @static
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*/
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function dateFormat($day, $month, $year, $format)
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{
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if (!Date_Calc::isValidDate($day, $month, $year)) {
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$year = Date_Calc::dateNow('%Y');
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$month = Date_Calc::dateNow('%m');
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$day = Date_Calc::dateNow('%d');
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}
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$output = '';
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for ($strpos = 0; $strpos < strlen($format); $strpos++) {
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$char = substr($format, $strpos, 1);
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if ($char == '%') {
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$nextchar = substr($format, $strpos + 1, 1);
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switch($nextchar) {
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case 'a':
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$output .= Date_Calc::getWeekdayAbbrname($day, $month, $year);
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break;
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case 'A':
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$output .= Date_Calc::getWeekdayFullname($day, $month, $year);
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break;
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case 'b':
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$output .= Date_Calc::getMonthAbbrname($month);
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break;
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case 'B':
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$output .= Date_Calc::getMonthFullname($month);
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break;
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case 'd':
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$output .= sprintf('%02d', $day);
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break;
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case 'e':
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$output .= $day;
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break;
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case 'E':
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$output .= Date_Calc::dateToDays($day, $month, $year);
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break;
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case 'j':
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$output .= Date_Calc::julianDate($day, $month, $year);
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break;
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case 'm':
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$output .= sprintf('%02d', $month);
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break;
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case 'n':
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$output .= "\n";
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break;
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case 't':
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$output .= "\t";
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break;
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case 'w':
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$output .= Date_Calc::dayOfWeek($day, $month, $year);
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break;
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case 'U':
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$output .= Date_Calc::weekOfYear($day, $month, $year);
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break;
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case 'y':
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$output .= substr($year, 2, 2);
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break;
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case 'Y':
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$output .= $year;
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break;
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case '%':
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$output .= '%';
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break;
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default:
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$output .= $char.$nextchar;
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}
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$strpos++;
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} else {
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$output .= $char;
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}
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}
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return $output;
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}
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// }}}
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// {{{ defaultCentury()
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/**
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* Turns a two digit year into a four digit year
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*
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* From '51 to '99 is in the 1900's, otherwise it's in the 2000's.
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*
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* @param int $year the 2 digit year
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*
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* @return string the 4 digit year
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*
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* @access public
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* @static
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*/
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function defaultCentury($year)
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{
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if (strlen($year) == 1) {
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$year = '0' . $year;
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}
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if ($year > 50) {
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return '19' . $year;
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} else {
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return '20' . $year;
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}
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}
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// }}}
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// {{{ dateToDays()
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/**
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* Converts a date to number of days since a distant unspecified epoch
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*
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* @param int $day the day of the month
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* @param int $month the month
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* @param int $year the year. Use the complete year instead of the
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* abbreviated version. E.g. use 2005, not 05.
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* Do not add leading 0's for years prior to 1000.
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*
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* @return integer the number of days since the Date_Calc epoch
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*
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* @access public
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* @static
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*/
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function dateToDays($day, $month, $year)
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{
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$century = (int)substr($year, 0, 2);
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$year = (int)substr($year, 2, 2);
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if ($month > 2) {
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$month -= 3;
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} else {
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$month += 9;
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if ($year) {
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$year--;
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} else {
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$year = 99;
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$century --;
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}
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}
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return (floor((146097 * $century) / 4 ) +
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floor((1461 * $year) / 4 ) +
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floor((153 * $month + 2) / 5 ) +
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$day + 1721119);
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}
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// }}}
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// {{{ daysToDate()
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/**
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* Converts number of days to a distant unspecified epoch
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*
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* @param int $days the number of days since the Date_Calc epoch
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* @param string $format the string indicating how to format the output
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*
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* @return string the date in the desired format
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*
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* @access public
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* @static
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*/
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function daysToDate($days, $format = DATE_CALC_FORMAT)
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{
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$days -= 1721119;
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$century = floor((4 * $days - 1) / 146097);
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$days = floor(4 * $days - 1 - 146097 * $century);
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$day = floor($days / 4);
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$year = floor((4 * $day + 3) / 1461);
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$day = floor(4 * $day + 3 - 1461 * $year);
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$day = floor(($day + 4) / 4);
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$month = floor((5 * $day - 3) / 153);
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$day = floor(5 * $day - 3 - 153 * $month);
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$day = floor(($day + 5) / 5);
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if ($month < 10) {
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$month +=3;
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} else {
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$month -=9;
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if ($year++ == 99) {
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$year = 0;
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$century++;
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}
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}
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$century = sprintf('%02d', $century);
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$year = sprintf('%02d', $year);
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return Date_Calc::dateFormat($day, $month, $century . $year, $format);
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}
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// }}}
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// {{{ gregorianToISO()
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/**
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* Converts from Gregorian Year-Month-Day to ISO Year-WeekNumber-WeekDay
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*
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* Uses ISO 8601 definitions. Algorithm by Rick McCarty, 1999 at
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* http://personal.ecu.edu/mccartyr/ISOwdALG.txt .
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* Transcribed to PHP by Jesus M. Castagnetto.
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*
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* @param int $day the day of the month
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* @param int $month the month
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* @param int $year the year. Use the complete year instead of the
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* abbreviated version. E.g. use 2005, not 05.
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* Do not add leading 0's for years prior to 1000.
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*
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* @return string the date in ISO Year-WeekNumber-WeekDay format
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*
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* @access public
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* @static
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*/
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function gregorianToISO($day, $month, $year)
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{
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$mnth = array (0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334);
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$y_isleap = Date_Calc::isLeapYear($year);
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$y_1_isleap = Date_Calc::isLeapYear($year - 1);
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$day_of_year_number = $day + $mnth[$month - 1];
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if ($y_isleap && $month > 2) {
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$day_of_year_number++;
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}
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// find Jan 1 weekday (monday = 1, sunday = 7)
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$yy = ($year - 1) % 100;
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$c = ($year - 1) - $yy;
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$g = $yy + intval($yy / 4);
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$jan1_weekday = 1 + intval((((($c / 100) % 4) * 5) + $g) % 7);
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// weekday for year-month-day
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$h = $day_of_year_number + ($jan1_weekday - 1);
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$weekday = 1 + intval(($h - 1) % 7);
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// find if Y M D falls in YearNumber Y-1, WeekNumber 52 or
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if ($day_of_year_number <= (8 - $jan1_weekday) && $jan1_weekday > 4){
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$yearnumber = $year - 1;
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if ($jan1_weekday == 5 || ($jan1_weekday == 6 && $y_1_isleap)) {
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$weeknumber = 53;
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} else {
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$weeknumber = 52;
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}
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} else {
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$yearnumber = $year;
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}
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// find if Y M D falls in YearNumber Y+1, WeekNumber 1
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if ($yearnumber == $year) {
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if ($y_isleap) {
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$i = 366;
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} else {
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$i = 365;
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}
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if (($i - $day_of_year_number) < (4 - $weekday)) {
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$yearnumber++;
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$weeknumber = 1;
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}
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}
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// find if Y M D falls in YearNumber Y, WeekNumber 1 through 53
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if ($yearnumber == $year) {
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$j = $day_of_year_number + (7 - $weekday) + ($jan1_weekday - 1);
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$weeknumber = intval($j / 7);
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if ($jan1_weekday > 4) {
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$weeknumber--;
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}
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}
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// put it all together
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if ($weeknumber < 10) {
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$weeknumber = '0'.$weeknumber;
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}
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return $yearnumber . '-' . $weeknumber . '-' . $weekday;
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}
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// }}}
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// {{{ dateSeason()
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/**
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* Determines julian date of the given season
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*
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* Adapted from previous work in Java by James Mark Hamilton.
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*
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* @param string $season the season to get the date for: VERNALEQUINOX,
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* SUMMERSOLSTICE, AUTUMNALEQUINOX,
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* or WINTERSOLSTICE
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* @param string $year the year in four digit format. Must be between
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* -1000BC and 3000AD.
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*
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* @return float the julian date the season starts on
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*
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* @author James Mark Hamilton <mhamilton@qwest.net>
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* @author Robert Butler <rob@maxwellcreek.org>
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* @access public
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* @static
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*/
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function dateSeason($season, $year = 0)
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{
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if ($year == '') {
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$year = Date_Calc::dateNow('%Y');
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}
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if (($year >= -1000) && ($year <= 1000)) {
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$y = $year / 1000.0;
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switch ($season) {
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case 'VERNALEQUINOX':
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$juliandate = (((((((-0.00071 * $y) - 0.00111) * $y) + 0.06134) * $y) + 365242.1374) * $y) + 1721139.29189;
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break;
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case 'SUMMERSOLSTICE':
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$juliandate = (((((((0.00025 * $y) + 0.00907) * $y) - 0.05323) * $y) + 365241.72562) * $y) + 1721233.25401;
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break;
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case 'AUTUMNALEQUINOX':
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$juliandate = (((((((0.00074 * $y) - 0.00297) * $y) - 0.11677) * $y) + 365242.49558) * $y) + 1721325.70455;
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break;
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case 'WINTERSOLSTICE':
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default:
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$juliandate = (((((((-0.00006 * $y) - 0.00933) * $y) - 0.00769) * $y) + 365242.88257) * $y) + 1721414.39987;
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}
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} elseif (($year > 1000) && ($year <= 3000)) {
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$y = ($year - 2000) / 1000;
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switch ($season) {
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case 'VERNALEQUINOX':
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$juliandate = (((((((-0.00057 * $y) - 0.00411) * $y) + 0.05169) * $y) + 365242.37404) * $y) + 2451623.80984;
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break;
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case 'SUMMERSOLSTICE':
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$juliandate = (((((((-0.0003 * $y) + 0.00888) * $y) + 0.00325) * $y) + 365241.62603) * $y) + 2451716.56767;
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break;
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case 'AUTUMNALEQUINOX':
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$juliandate = (((((((0.00078 * $y) + 0.00337) * $y) - 0.11575) * $y) + 365242.01767) * $y) + 2451810.21715;
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break;
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case 'WINTERSOLSTICE':
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default:
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$juliandate = (((((((0.00032 * $y) - 0.00823) * $y) - 0.06223) * $y) + 365242.74049) * $y) + 2451900.05952;
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}
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}
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return $juliandate;
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}
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// }}}
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// {{{ dateNow()
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|
|
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/**
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|
* Returns the current local date
|
|
*
|
|
* NOTE: This function retrieves the local date using strftime(),
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|
* which may or may not be 32-bit safe on your system.
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*
|
|
* @param string $format the string indicating how to format the output
|
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*
|
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* @return string the current date in the specified format
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*
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* @access public
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* @static
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*/
|
|
function dateNow($format = DATE_CALC_FORMAT)
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{
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return strftime($format, time());
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}
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// }}}
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// {{{ getYear()
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|
|
|
/**
|
|
* Returns the current local year in format CCYY
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|
*
|
|
* @return string the current year in four digit format
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*
|
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* @access public
|
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* @static
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|
*/
|
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function getYear()
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{
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return Date_Calc::dateNow('%Y');
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}
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// }}}
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// {{{ getMonth()
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|
|
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/**
|
|
* Returns the current local month in format MM
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|
*
|
|
* @return string the current month in two digit format
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*
|
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* @access public
|
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* @static
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|
*/
|
|
function getMonth()
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|
{
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return Date_Calc::dateNow('%m');
|
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}
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|
|
|
// }}}
|
|
// {{{ getDay()
|
|
|
|
/**
|
|
* Returns the current local day in format DD
|
|
*
|
|
* @return string the current day of the month in two digit format
|
|
*
|
|
* @access public
|
|
* @static
|
|
*/
|
|
function getDay()
|
|
{
|
|
return Date_Calc::dateNow('%d');
|
|
}
|
|
|
|
// }}}
|
|
// {{{ julianDate()
|
|
|
|
/**
|
|
* Returns number of days since 31 December of year before given date
|
|
*
|
|
* @param int $day the day of the month, default is current local day
|
|
* @param int $month the month, default is current local month
|
|
* @param int $year the year in four digit format, default is current local year
|
|
*
|
|
* @return int the julian date for the date
|
|
*
|
|
* @access public
|
|
* @static
|
|
*/
|
|
function julianDate($day = 0, $month = 0, $year = 0)
|
|
{
|
|
if (empty($year)) {
|
|
$year = Date_Calc::dateNow('%Y');
|
|
}
|
|
if (empty($month)) {
|
|
$month = Date_Calc::dateNow('%m');
|
|
}
|
|
if (empty($day)) {
|
|
$day = Date_Calc::dateNow('%d');
|
|
}
|
|
$days = array(0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334);
|
|
$julian = ($days[$month - 1] + $day);
|
|
if ($month > 2 && Date_Calc::isLeapYear($year)) {
|
|
$julian++;
|
|
}
|
|
return $julian;
|
|
}
|
|
|
|
// }}}
|
|
// {{{ getWeekdayFullname()
|
|
|
|
/**
|
|
* Returns the full weekday name for the given date
|
|
*
|
|
* @param int $day the day of the month, default is current local day
|
|
* @param int $month the month, default is current local month
|
|
* @param int $year the year in four digit format, default is current local year
|
|
*
|
|
* @return string the full name of the day of the week
|
|
*
|
|
* @access public
|
|
* @static
|
|
*/
|
|
function getWeekdayFullname($day = 0, $month = 0, $year = 0)
|
|
{
|
|
if (empty($year)) {
|
|
$year = Date_Calc::dateNow('%Y');
|
|
}
|
|
if (empty($month)) {
|
|
$month = Date_Calc::dateNow('%m');
|
|
}
|
|
if (empty($day)) {
|
|
$day = Date_Calc::dateNow('%d');
|
|
}
|
|
$weekday_names = Date_Calc::getWeekDays();
|
|
$weekday = Date_Calc::dayOfWeek($day, $month, $year);
|
|
return $weekday_names[$weekday];
|
|
}
|
|
|
|
// }}}
|
|
// {{{ getWeekdayAbbrname()
|
|
|
|
/**
|
|
* Returns the abbreviated weekday name for the given date
|
|
*
|
|
* @param int $day the day of the month, default is current local day
|
|
* @param int $month the month, default is current local month
|
|
* @param int $year the year in four digit format, default is current local year
|
|
* @param int $length the length of abbreviation
|
|
*
|
|
* @return string the abbreviated name of the day of the week
|
|
*
|
|
* @access public
|
|
* @static
|
|
* @see Date_Calc::getWeekdayFullname()
|
|
*/
|
|
function getWeekdayAbbrname($day = 0, $month = 0, $year = 0, $length = 3)
|
|
{
|
|
if (empty($year)) {
|
|
$year = Date_Calc::dateNow('%Y');
|
|
}
|
|
if (empty($month)) {
|
|
$month = Date_Calc::dateNow('%m');
|
|
}
|
|
if (empty($day)) {
|
|
$day = Date_Calc::dateNow('%d');
|
|
}
|
|
return substr(Date_Calc::getWeekdayFullname($day, $month, $year),
|
|
0, $length);
|
|
}
|
|
|
|
// }}}
|
|
// {{{ getMonthFullname()
|
|
|
|
/**
|
|
* Returns the full month name for the given month
|
|
*
|
|
* @param int $month the month
|
|
*
|
|
* @return string the full name of the month
|
|
*
|
|
* @access public
|
|
* @static
|
|
*/
|
|
function getMonthFullname($month)
|
|
{
|
|
$month = (int)$month;
|
|
if (empty($month)) {
|
|
$month = (int)Date_Calc::dateNow('%m');
|
|
}
|
|
$month_names = Date_Calc::getMonthNames();
|
|
return $month_names[$month];
|
|
}
|
|
|
|
// }}}
|
|
// {{{ getMonthAbbrname()
|
|
|
|
/**
|
|
* Returns the abbreviated month name for the given month
|
|
*
|
|
* @param int $month the month
|
|
* @param int $length the length of abbreviation
|
|
*
|
|
* @return string the abbreviated name of the month
|
|
*
|
|
* @access public
|
|
* @static
|
|
* @see Date_Calc::getMonthFullname
|
|
*/
|
|
function getMonthAbbrname($month, $length = 3)
|
|
{
|
|
$month = (int)$month;
|
|
if (empty($month)) {
|
|
$month = Date_Calc::dateNow('%m');
|
|
}
|
|
return substr(Date_Calc::getMonthFullname($month), 0, $length);
|
|
}
|
|
|
|
// }}}
|
|
// {{{ getMonthNames()
|
|
|
|
/**
|
|
* Returns an array of month names
|
|
*
|
|
* Used to take advantage of the setlocale function to return
|
|
* language specific month names.
|
|
*
|
|
* TODO: cache values to some global array to avoid preformace
|
|
* hits when called more than once.
|
|
*
|
|
* @returns array an array of month names
|
|
*
|
|
* @access public
|
|
* @static
|
|
*/
|
|
function getMonthNames()
|
|
{
|
|
$months = array();
|
|
for ($i = 1; $i < 13; $i++) {
|
|
$months[$i] = strftime('%B', mktime(0, 0, 0, $i, 1, 2001));
|
|
}
|
|
return $months;
|
|
}
|
|
|
|
// }}}
|
|
// {{{ getWeekDays()
|
|
|
|
/**
|
|
* Returns an array of week days
|
|
*
|
|
* Used to take advantage of the setlocale function to
|
|
* return language specific week days.
|
|
*
|
|
* TODO: cache values to some global array to avoid preformace
|
|
* hits when called more than once.
|
|
*
|
|
* @returns array an array of week day names
|
|
*
|
|
* @access public
|
|
* @static
|
|
*/
|
|
function getWeekDays()
|
|
{
|
|
$weekdays = array();
|
|
for ($i = 0; $i < 7; $i++) {
|
|
$weekdays[$i] = strftime('%A', mktime(0, 0, 0, 1, $i, 2001));
|
|
}
|
|
return $weekdays;
|
|
}
|
|
|
|
// }}}
|
|
// {{{ dayOfWeek()
|
|
|
|
/**
|
|
* Returns day of week for given date (0 = Sunday)
|
|
*
|
|
* @param int $day the day of the month, default is current local day
|
|
* @param int $month the month, default is current local month
|
|
* @param int $year the year in four digit format, default is current local year
|
|
*
|
|
* @return int the number of the day in the week
|
|
*
|
|
* @access public
|
|
* @static
|
|
*/
|
|
function dayOfWeek($day = 0, $month = 0, $year = 0)
|
|
{
|
|
if (empty($year)) {
|
|
$year = Date_Calc::dateNow('%Y');
|
|
}
|
|
if (empty($month)) {
|
|
$month = Date_Calc::dateNow('%m');
|
|
}
|
|
if (empty($day)) {
|
|
$day = Date_Calc::dateNow('%d');
|
|
}
|
|
if ($month > 2) {
|
|
$month -= 2;
|
|
} else {
|
|
$month += 10;
|
|
$year--;
|
|
}
|
|
|
|
$day = (floor((13 * $month - 1) / 5) +
|
|
$day + ($year % 100) +
|
|
floor(($year % 100) / 4) +
|
|
floor(($year / 100) / 4) - 2 *
|
|
floor($year / 100) + 77);
|
|
|
|
$weekday_number = $day - 7 * floor($day / 7);
|
|
return $weekday_number;
|
|
}
|
|
|
|
// }}}
|
|
// {{{ weekOfYear()
|
|
|
|
/**
|
|
* Returns week of the year, first Sunday is first day of first week
|
|
*
|
|
* @param int $day the day of the month, default is current local day
|
|
* @param int $month the month, default is current local month
|
|
* @param int $year the year in four digit format, default is current local year
|
|
*
|
|
* @return int the number of the week in the year
|
|
*
|
|
* @access public
|
|
* @static
|
|
*/
|
|
function weekOfYear($day = 0, $month = 0, $year = 0)
|
|
{
|
|
if (empty($year)) {
|
|
$year = Date_Calc::dateNow('%Y');
|
|
}
|
|
if (empty($month)) {
|
|
$month = Date_Calc::dateNow('%m');
|
|
}
|
|
if (empty($day)) {
|
|
$day = Date_Calc::dateNow('%d');
|
|
}
|
|
$iso = Date_Calc::gregorianToISO($day, $month, $year);
|
|
$parts = explode('-', $iso);
|
|
$week_number = intval($parts[1]);
|
|
return $week_number;
|
|
}
|
|
|
|
// }}}
|
|
// {{{ quarterOfYear()
|
|
|
|
/**
|
|
* Returns quarter of the year for given date
|
|
*
|
|
* @param int $day the day of the month, default is current local day
|
|
* @param int $month the month, default is current local month
|
|
* @param int $year the year in four digit format, default is current local year
|
|
*
|
|
* @return int the number of the quarter in the year
|
|
*
|
|
* @access public
|
|
* @static
|
|
*/
|
|
function quarterOfYear($day = 0, $month = 0, $year = 0)
|
|
{
|
|
if (empty($year)) {
|
|
$year = Date_Calc::dateNow('%Y');
|
|
}
|
|
if (empty($month)) {
|
|
$month = Date_Calc::dateNow('%m');
|
|
}
|
|
if (empty($day)) {
|
|
$day = Date_Calc::dateNow('%d');
|
|
}
|
|
$year_quarter = intval(($month - 1) / 3 + 1);
|
|
return $year_quarter;
|
|
}
|
|
|
|
// }}}
|
|
// {{{ daysInMonth()
|
|
|
|
/**
|
|
* Find the number of days in the given month
|
|
*
|
|
* @param int $month the month, default is current local month
|
|
* @param int $year the year in four digit format, default is current local year
|
|
*
|
|
* @return int the number of days the month has
|
|
*
|
|
* @access public
|
|
* @static
|
|
*/
|
|
function daysInMonth($month = 0, $year = 0)
|
|
{
|
|
if (empty($year)) {
|
|
$year = Date_Calc::dateNow('%Y');
|
|
}
|
|
if (empty($month)) {
|
|
$month = Date_Calc::dateNow('%m');
|
|
}
|
|
|
|
if ($year == 1582 && $month == 10) {
|
|
return 21; // October 1582 only had 1st-4th and 15th-31st
|
|
}
|
|
|
|
if ($month == 2) {
|
|
if (Date_Calc::isLeapYear($year)) {
|
|
return 29;
|
|
} else {
|
|
return 28;
|
|
}
|
|
} elseif ($month == 4 or $month == 6 or $month == 9 or $month == 11) {
|
|
return 30;
|
|
} else {
|
|
return 31;
|
|
}
|
|
}
|
|
|
|
// }}}
|
|
// {{{ weeksInMonth()
|
|
|
|
/**
|
|
* Returns the number of rows on a calendar month
|
|
*
|
|
* Useful for determining the number of rows when displaying a typical
|
|
* month calendar.
|
|
*
|
|
* @param int $month the month, default is current local month
|
|
* @param int $year the year in four digit format, default is current local year
|
|
*
|
|
* @return int the number of weeks the month has
|
|
*
|
|
* @access public
|
|
* @static
|
|
*/
|
|
function weeksInMonth($month = 0, $year = 0)
|
|
{
|
|
if (empty($year)) {
|
|
$year = Date_Calc::dateNow('%Y');
|
|
}
|
|
if (empty($month)) {
|
|
$month = Date_Calc::dateNow('%m');
|
|
}
|
|
$FDOM = Date_Calc::firstOfMonthWeekday($month, $year);
|
|
if (DATE_CALC_BEGIN_WEEKDAY==1 && $FDOM==0) {
|
|
$first_week_days = 7 - $FDOM + DATE_CALC_BEGIN_WEEKDAY;
|
|
$weeks = 1;
|
|
} elseif (DATE_CALC_BEGIN_WEEKDAY==0 && $FDOM == 6) {
|
|
$first_week_days = 7 - $FDOM + DATE_CALC_BEGIN_WEEKDAY;
|
|
$weeks = 1;
|
|
} else {
|
|
$first_week_days = DATE_CALC_BEGIN_WEEKDAY - $FDOM;
|
|
$weeks = 0;
|
|
}
|
|
$first_week_days %= 7;
|
|
return ceil((Date_Calc::daysInMonth($month, $year)
|
|
- $first_week_days) / 7) + $weeks;
|
|
}
|
|
|
|
// }}}
|
|
// {{{ getCalendarWeek()
|
|
|
|
/**
|
|
* Return an array with days in week
|
|
*
|
|
* @param int $day the day of the month, default is current local day
|
|
* @param int $month the month, default is current local month
|
|
* @param int $year the year in four digit format, default is current local year
|
|
* @param string $format the string indicating how to format the output
|
|
*
|
|
* @return array $week[$weekday]
|
|
*
|
|
* @access public
|
|
* @static
|
|
*/
|
|
function getCalendarWeek($day = 0, $month = 0, $year = 0,
|
|
$format = DATE_CALC_FORMAT)
|
|
{
|
|
if (empty($year)) {
|
|
$year = Date_Calc::dateNow('%Y');
|
|
}
|
|
if (empty($month)) {
|
|
$month = Date_Calc::dateNow('%m');
|
|
}
|
|
if (empty($day)) {
|
|
$day = Date_Calc::dateNow('%d');
|
|
}
|
|
|
|
$week_array = array();
|
|
|
|
// date for the column of week
|
|
|
|
$curr_day = Date_Calc::beginOfWeek($day, $month, $year,'%E');
|
|
|
|
for ($counter = 0; $counter <= 6; $counter++) {
|
|
$week_array[$counter] = Date_Calc::daysToDate($curr_day, $format);
|
|
$curr_day++;
|
|
}
|
|
return $week_array;
|
|
}
|
|
|
|
// }}}
|
|
// {{{ getCalendarMonth()
|
|
|
|
/**
|
|
* Return a set of arrays to construct a calendar month for the given date
|
|
*
|
|
* @param int $month the month, default is current local month
|
|
* @param int $year the year in four digit format, default is current local year
|
|
* @param string $format the string indicating how to format the output
|
|
*
|
|
* @return array $month[$row][$col]
|
|
*
|
|
* @access public
|
|
* @static
|
|
*/
|
|
function getCalendarMonth($month = 0, $year = 0,
|
|
$format = DATE_CALC_FORMAT)
|
|
{
|
|
if (empty($year)) {
|
|
$year = Date_Calc::dateNow('%Y');
|
|
}
|
|
if (empty($month)) {
|
|
$month = Date_Calc::dateNow('%m');
|
|
}
|
|
|
|
$month_array = array();
|
|
|
|
// date for the first row, first column of calendar month
|
|
if (DATE_CALC_BEGIN_WEEKDAY == 1) {
|
|
if (Date_Calc::firstOfMonthWeekday($month, $year) == 0) {
|
|
$curr_day = Date_Calc::dateToDays('01', $month, $year) - 6;
|
|
} else {
|
|
$curr_day = Date_Calc::dateToDays('01', $month, $year)
|
|
- Date_Calc::firstOfMonthWeekday($month, $year) + 1;
|
|
}
|
|
} else {
|
|
$curr_day = (Date_Calc::dateToDays('01', $month, $year)
|
|
- Date_Calc::firstOfMonthWeekday($month, $year));
|
|
}
|
|
|
|
// number of days in this month
|
|
$daysInMonth = Date_Calc::daysInMonth($month, $year);
|
|
|
|
$weeksInMonth = Date_Calc::weeksInMonth($month, $year);
|
|
for ($row_counter = 0; $row_counter < $weeksInMonth; $row_counter++) {
|
|
for ($column_counter = 0; $column_counter <= 6; $column_counter++) {
|
|
$month_array[$row_counter][$column_counter] =
|
|
Date_Calc::daysToDate($curr_day , $format);
|
|
$curr_day++;
|
|
}
|
|
}
|
|
|
|
return $month_array;
|
|
}
|
|
|
|
// }}}
|
|
// {{{ getCalendarYear()
|
|
|
|
/**
|
|
* Return a set of arrays to construct a calendar year for the given date
|
|
*
|
|
* @param int $year the year in four digit format, default current local year
|
|
* @param string $format the string indicating how to format the output
|
|
*
|
|
* @return array $year[$month][$row][$col]
|
|
*
|
|
* @access public
|
|
* @static
|
|
*/
|
|
function getCalendarYear($year = 0, $format = DATE_CALC_FORMAT)
|
|
{
|
|
if (empty($year)) {
|
|
$year = Date_Calc::dateNow('%Y');
|
|
}
|
|
|
|
$year_array = array();
|
|
|
|
for ($curr_month = 0; $curr_month <= 11; $curr_month++) {
|
|
$year_array[$curr_month] =
|
|
Date_Calc::getCalendarMonth($curr_month + 1,
|
|
$year, $format);
|
|
}
|
|
|
|
return $year_array;
|
|
}
|
|
|
|
// }}}
|
|
// {{{ prevDay()
|
|
|
|
/**
|
|
* Returns date of day before given date
|
|
*
|
|
* @param int $day the day of the month, default is current local day
|
|
* @param int $month the month, default is current local month
|
|
* @param int $year the year in four digit format, default is current local year
|
|
* @param string $format the string indicating how to format the output
|
|
*
|
|
* @return string the date in the desired format
|
|
*
|
|
* @access public
|
|
* @static
|
|
*/
|
|
function prevDay($day = 0, $month = 0, $year = 0,
|
|
$format = DATE_CALC_FORMAT)
|
|
{
|
|
if (empty($year)) {
|
|
$year = Date_Calc::dateNow('%Y');
|
|
}
|
|
if (empty($month)) {
|
|
$month = Date_Calc::dateNow('%m');
|
|
}
|
|
if (empty($day)) {
|
|
$day = Date_Calc::dateNow('%d');
|
|
}
|
|
$days = Date_Calc::dateToDays($day, $month, $year);
|
|
return Date_Calc::daysToDate($days - 1, $format);
|
|
}
|
|
|
|
// }}}
|
|
// {{{ nextDay()
|
|
|
|
/**
|
|
* Returns date of day after given date
|
|
*
|
|
* @param int $day the day of the month, default is current local day
|
|
* @param int $month the month, default is current local month
|
|
* @param int $year the year in four digit format, default is current local year
|
|
* @param string $format the string indicating how to format the output
|
|
*
|
|
* @return string the date in the desired format
|
|
*
|
|
* @access public
|
|
* @static
|
|
*/
|
|
function nextDay($day = 0, $month = 0, $year = 0,
|
|
$format = DATE_CALC_FORMAT)
|
|
{
|
|
if (empty($year)) {
|
|
$year = Date_Calc::dateNow('%Y');
|
|
}
|
|
if (empty($month)) {
|
|
$month = Date_Calc::dateNow('%m');
|
|
}
|
|
if (empty($day)) {
|
|
$day = Date_Calc::dateNow('%d');
|
|
}
|
|
$days = Date_Calc::dateToDays($day, $month, $year);
|
|
return Date_Calc::daysToDate($days + 1, $format);
|
|
}
|
|
|
|
// }}}
|
|
// {{{ prevWeekday()
|
|
|
|
/**
|
|
* Returns date of the previous weekday, skipping from Monday to Friday
|
|
*
|
|
* @param int $day the day of the month, default is current local day
|
|
* @param int $month the month, default is current local month
|
|
* @param int $year the year in four digit format, default is current local year
|
|
* @param string $format the string indicating how to format the output
|
|
*
|
|
* @return string the date in the desired format
|
|
*
|
|
* @access public
|
|
* @static
|
|
*/
|
|
function prevWeekday($day = 0, $month = 0, $year = 0,
|
|
$format = DATE_CALC_FORMAT)
|
|
{
|
|
if (empty($year)) {
|
|
$year = Date_Calc::dateNow('%Y');
|
|
}
|
|
if (empty($month)) {
|
|
$month = Date_Calc::dateNow('%m');
|
|
}
|
|
if (empty($day)) {
|
|
$day = Date_Calc::dateNow('%d');
|
|
}
|
|
$days = Date_Calc::dateToDays($day, $month, $year);
|
|
if (Date_Calc::dayOfWeek($day, $month, $year) == 1) {
|
|
$days -= 3;
|
|
} elseif (Date_Calc::dayOfWeek($day, $month, $year) == 0) {
|
|
$days -= 2;
|
|
} else {
|
|
$days -= 1;
|
|
}
|
|
return Date_Calc::daysToDate($days, $format);
|
|
}
|
|
|
|
// }}}
|
|
// {{{ nextWeekday()
|
|
|
|
/**
|
|
* Returns date of the next weekday of given date, skipping from
|
|
* Friday to Monday
|
|
*
|
|
* @param int $day the day of the month, default is current local day
|
|
* @param int $month the month, default is current local month
|
|
* @param int $year the year in four digit format, default is current local year
|
|
* @param string $format the string indicating how to format the output
|
|
*
|
|
* @return string the date in the desired format
|
|
*
|
|
* @access public
|
|
* @static
|
|
*/
|
|
function nextWeekday($day = 0, $month = 0, $year = 0,
|
|
$format = DATE_CALC_FORMAT)
|
|
{
|
|
if (empty($year)) {
|
|
$year = Date_Calc::dateNow('%Y');
|
|
}
|
|
if (empty($month)) {
|
|
$month = Date_Calc::dateNow('%m');
|
|
}
|
|
if (empty($day)) {
|
|
$day = Date_Calc::dateNow('%d');
|
|
}
|
|
$days = Date_Calc::dateToDays($day, $month, $year);
|
|
if (Date_Calc::dayOfWeek($day, $month, $year) == 5) {
|
|
$days += 3;
|
|
} elseif (Date_Calc::dayOfWeek($day, $month, $year) == 6) {
|
|
$days += 2;
|
|
} else {
|
|
$days += 1;
|
|
}
|
|
return Date_Calc::daysToDate($days, $format);
|
|
}
|
|
|
|
// }}}
|
|
// {{{ prevDayOfWeek()
|
|
|
|
/**
|
|
* Returns date of the previous specific day of the week
|
|
* from the given date
|
|
*
|
|
* @param int day of week, 0=Sunday
|
|
* @param int $day the day of the month, default is current local day
|
|
* @param int $month the month, default is current local month
|
|
* @param int $year the year in four digit format, default is current local year
|
|
* @param bool $onOrBefore if true and days are same, returns current day
|
|
* @param string $format the string indicating how to format the output
|
|
*
|
|
* @return string the date in the desired format
|
|
*
|
|
* @access public
|
|
* @static
|
|
*/
|
|
function prevDayOfWeek($dow, $day = 0, $month = 0, $year = 0,
|
|
$format = DATE_CALC_FORMAT, $onOrBefore = false)
|
|
{
|
|
if (empty($year)) {
|
|
$year = Date_Calc::dateNow('%Y');
|
|
}
|
|
if (empty($month)) {
|
|
$month = Date_Calc::dateNow('%m');
|
|
}
|
|
if (empty($day)) {
|
|
$day = Date_Calc::dateNow('%d');
|
|
}
|
|
$days = Date_Calc::dateToDays($day, $month, $year);
|
|
$curr_weekday = Date_Calc::dayOfWeek($day, $month, $year);
|
|
if ($curr_weekday == $dow) {
|
|
if (!$onOrBefore) {
|
|
$days -= 7;
|
|
}
|
|
} elseif ($curr_weekday < $dow) {
|
|
$days -= 7 - ($dow - $curr_weekday);
|
|
} else {
|
|
$days -= $curr_weekday - $dow;
|
|
}
|
|
return Date_Calc::daysToDate($days, $format);
|
|
}
|
|
|
|
// }}}
|
|
// {{{ nextDayOfWeek()
|
|
|
|
/**
|
|
* Returns date of the next specific day of the week
|
|
* from the given date
|
|
*
|
|
* @param int $dow the day of the week (0 = Sunday)
|
|
* @param int $day the day of the month, default is current local day
|
|
* @param int $month the month, default is current local month
|
|
* @param int $year the year in four digit format, default is current local year
|
|
* @param bool $onOrAfter if true and days are same, returns current day
|
|
* @param string $format the string indicating how to format the output
|
|
*
|
|
* @return string the date in the desired format
|
|
*
|
|
* @access public
|
|
* @static
|
|
*/
|
|
function nextDayOfWeek($dow, $day = 0, $month = 0, $year = 0,
|
|
$format = DATE_CALC_FORMAT, $onOrAfter = false)
|
|
{
|
|
if (empty($year)) {
|
|
$year = Date_Calc::dateNow('%Y');
|
|
}
|
|
if (empty($month)) {
|
|
$month = Date_Calc::dateNow('%m');
|
|
}
|
|
if (empty($day)) {
|
|
$day = Date_Calc::dateNow('%d');
|
|
}
|
|
|
|
$days = Date_Calc::dateToDays($day, $month, $year);
|
|
$curr_weekday = Date_Calc::dayOfWeek($day, $month, $year);
|
|
|
|
if ($curr_weekday == $dow) {
|
|
if (!$onOrAfter) {
|
|
$days += 7;
|
|
}
|
|
} elseif ($curr_weekday > $dow) {
|
|
$days += 7 - ($curr_weekday - $dow);
|
|
} else {
|
|
$days += $dow - $curr_weekday;
|
|
}
|
|
|
|
return Date_Calc::daysToDate($days, $format);
|
|
}
|
|
|
|
// }}}
|
|
// {{{ prevDayOfWeekOnOrBefore()
|
|
|
|
/**
|
|
* Returns date of the previous specific day of the week
|
|
* on or before the given date
|
|
*
|
|
* @param int $dow the day of the week (0 = Sunday)
|
|
* @param int $day the day of the month, default is current local day
|
|
* @param int $month the month, default is current local month
|
|
* @param int $year the year in four digit format, default is current local year
|
|
* @param string $format the string indicating how to format the output
|
|
*
|
|
* @return string the date in the desired format
|
|
*
|
|
* @access public
|
|
* @static
|
|
*/
|
|
function prevDayOfWeekOnOrBefore($dow, $day = 0, $month = 0, $year = 0,
|
|
$format = DATE_CALC_FORMAT)
|
|
{
|
|
return Date_Calc::prevDayOfWeek($dow, $day, $month, $year, $format,
|
|
true);
|
|
}
|
|
|
|
// }}}
|
|
// {{{ nextDayOfWeekOnOrAfter()
|
|
|
|
/**
|
|
* Returns date of the next specific day of the week
|
|
* on or after the given date
|
|
*
|
|
* @param int $dow the day of the week (0 = Sunday)
|
|
* @param int $day the day of the month, default is current local day
|
|
* @param int $month the month, default is current local month
|
|
* @param int $year the year in four digit format, default is current local year
|
|
* @param string $format the string indicating how to format the output
|
|
*
|
|
* @return string the date in the desired format
|
|
*
|
|
* @access public
|
|
* @static
|
|
*/
|
|
function nextDayOfWeekOnOrAfter($dow, $day = 0, $month = 0, $year = 0,
|
|
$format = DATE_CALC_FORMAT)
|
|
{
|
|
return Date_Calc::nextDayOfWeek($dow, $day, $month, $year, $format,
|
|
true);
|
|
}
|
|
|
|
// }}}
|
|
// {{{ beginOfWeek()
|
|
|
|
/**
|
|
* Find the month day of the beginning of week for given date,
|
|
* using DATE_CALC_BEGIN_WEEKDAY
|
|
*
|
|
* Can return weekday of prev month.
|
|
*
|
|
* @param int $day the day of the month, default is current local day
|
|
* @param int $month the month, default is current local month
|
|
* @param int $year the year in four digit format, default is current local year
|
|
* @param string $format the string indicating how to format the output
|
|
*
|
|
* @return string the date in the desired format
|
|
*
|
|
* @access public
|
|
* @static
|
|
*/
|
|
function beginOfWeek($day = 0, $month = 0, $year = 0,
|
|
$format = DATE_CALC_FORMAT)
|
|
{
|
|
if (empty($year)) {
|
|
$year = Date_Calc::dateNow('%Y');
|
|
}
|
|
if (empty($month)) {
|
|
$month = Date_Calc::dateNow('%m');
|
|
}
|
|
if (empty($day)) {
|
|
$day = Date_Calc::dateNow('%d');
|
|
}
|
|
$this_weekday = Date_Calc::dayOfWeek($day, $month, $year);
|
|
$interval = (7 - DATE_CALC_BEGIN_WEEKDAY + $this_weekday) % 7;
|
|
return Date_Calc::daysToDate(Date_Calc::dateToDays($day, $month, $year)
|
|
- $interval, $format);
|
|
}
|
|
|
|
// }}}
|
|
// {{{ endOfWeek()
|
|
|
|
/**
|
|
* Find the month day of the end of week for given date,
|
|
* using DATE_CALC_BEGIN_WEEKDAY
|
|
*
|
|
* Can return weekday of following month.
|
|
*
|
|
* @param int $day the day of the month, default is current local day
|
|
* @param int $month the month, default is current local month
|
|
* @param int $year the year in four digit format, default is current local year
|
|
* @param string $format the string indicating how to format the output
|
|
*
|
|
* @return string the date in the desired format
|
|
*
|
|
* @access public
|
|
* @static
|
|
*/
|
|
function endOfWeek($day = 0, $month = 0, $year = 0,
|
|
$format = DATE_CALC_FORMAT)
|
|
{
|
|
if (empty($year)) {
|
|
$year = Date_Calc::dateNow('%Y');
|
|
}
|
|
if (empty($month)) {
|
|
$month = Date_Calc::dateNow('%m');
|
|
}
|
|
if (empty($day)) {
|
|
$day = Date_Calc::dateNow('%d');
|
|
}
|
|
$this_weekday = Date_Calc::dayOfWeek($day, $month, $year);
|
|
$interval = (6 + DATE_CALC_BEGIN_WEEKDAY - $this_weekday) % 7;
|
|
return Date_Calc::daysToDate(Date_Calc::dateToDays($day, $month, $year)
|
|
+ $interval, $format);
|
|
}
|
|
|
|
// }}}
|
|
// {{{ beginOfPrevWeek()
|
|
|
|
/**
|
|
* Find the month day of the beginning of week before given date,
|
|
* using DATE_CALC_BEGIN_WEEKDAY
|
|
*
|
|
* Can return weekday of prev month.
|
|
*
|
|
* @param int $day the day of the month, default is current local day
|
|
* @param int $month the month, default is current local month
|
|
* @param int $year the year in four digit format, default is current local year
|
|
* @param string $format the string indicating how to format the output
|
|
*
|
|
* @return string the date in the desired format
|
|
*
|
|
* @access public
|
|
* @static
|
|
*/
|
|
function beginOfPrevWeek($day = 0, $month = 0, $year = 0,
|
|
$format = DATE_CALC_FORMAT)
|
|
{
|
|
if (empty($year)) {
|
|
$year = Date_Calc::dateNow('%Y');
|
|
}
|
|
if (empty($month)) {
|
|
$month = Date_Calc::dateNow('%m');
|
|
}
|
|
if (empty($day)) {
|
|
$day = Date_Calc::dateNow('%d');
|
|
}
|
|
|
|
$date = Date_Calc::daysToDate(Date_Calc::dateToDays($day-7,
|
|
$month,
|
|
$year),
|
|
'%Y%m%d');
|
|
|
|
$prev_week_year = substr($date, 0, 4);
|
|
$prev_week_month = substr($date, 4, 2);
|
|
$prev_week_day = substr($date, 6, 2);
|
|
|
|
return Date_Calc::beginOfWeek($prev_week_day, $prev_week_month,
|
|
$prev_week_year, $format);
|
|
}
|
|
|
|
// }}}
|
|
// {{{ beginOfNextWeek()
|
|
|
|
/**
|
|
* Find the month day of the beginning of week after given date,
|
|
* using DATE_CALC_BEGIN_WEEKDAY
|
|
*
|
|
* Can return weekday of prev month.
|
|
*
|
|
* @param int $day the day of the month, default is current local day
|
|
* @param int $month the month, default is current local month
|
|
* @param int $year the year in four digit format, default is current local year
|
|
* @param string $format the string indicating how to format the output
|
|
*
|
|
* @return string the date in the desired format
|
|
*
|
|
* @access public
|
|
* @static
|
|
*/
|
|
function beginOfNextWeek($day = 0, $month = 0, $year = 0,
|
|
$format = DATE_CALC_FORMAT)
|
|
{
|
|
if (empty($year)) {
|
|
$year = Date_Calc::dateNow('%Y');
|
|
}
|
|
if (empty($month)) {
|
|
$month = Date_Calc::dateNow('%m');
|
|
}
|
|
if (empty($day)) {
|
|
$day = Date_Calc::dateNow('%d');
|
|
}
|
|
|
|
$date = Date_Calc::daysToDate(Date_Calc::dateToDays($day + 7,
|
|
$month,
|
|
$year),
|
|
'%Y%m%d');
|
|
|
|
$next_week_year = substr($date, 0, 4);
|
|
$next_week_month = substr($date, 4, 2);
|
|
$next_week_day = substr($date, 6, 2);
|
|
|
|
return Date_Calc::beginOfWeek($next_week_day, $next_week_month,
|
|
$next_week_year, $format);
|
|
}
|
|
|
|
// }}}
|
|
// {{{ beginOfMonth()
|
|
|
|
/**
|
|
* Return date of first day of month of given date
|
|
*
|
|
* @param int $month the month, default is current local month
|
|
* @param int $year the year in four digit format, default is current local year
|
|
* @param string $format the string indicating how to format the output
|
|
*
|
|
* @return string the date in the desired format
|
|
*
|
|
* @access public
|
|
* @static
|
|
* @see Date_Calc::beginOfMonthBySpan()
|
|
* @deprecated Method deprecated in Release 1.4.4
|
|
*/
|
|
function beginOfMonth($month = 0, $year = 0, $format = DATE_CALC_FORMAT)
|
|
{
|
|
if (empty($year)) {
|
|
$year = Date_Calc::dateNow('%Y');
|
|
}
|
|
if (empty($month)) {
|
|
$month = Date_Calc::dateNow('%m');
|
|
}
|
|
return Date_Calc::dateFormat('01', $month, $year, $format);
|
|
}
|
|
|
|
// }}}
|
|
// {{{ beginOfPrevMonth()
|
|
|
|
/**
|
|
* Returns date of the first day of previous month of given date
|
|
*
|
|
* @param int $day the day of the month, default is current local day
|
|
* @param int $month the month, default is current local month
|
|
* @param int $year the year in four digit format, default is current local year
|
|
* @param string $format the string indicating how to format the output
|
|
*
|
|
* @return string the date in the desired format
|
|
*
|
|
* @access public
|
|
* @static
|
|
* @see Date_Calc::beginOfMonthBySpan()
|
|
* @deprecated Method deprecated in Release 1.4.4
|
|
*/
|
|
function beginOfPrevMonth($day = 0, $month = 0, $year = 0,
|
|
$format = DATE_CALC_FORMAT)
|
|
{
|
|
if (empty($year)) {
|
|
$year = Date_Calc::dateNow('%Y');
|
|
}
|
|
if (empty($month)) {
|
|
$month = Date_Calc::dateNow('%m');
|
|
}
|
|
if (empty($day)) {
|
|
$day = Date_Calc::dateNow('%d');
|
|
}
|
|
if ($month > 1) {
|
|
$month--;
|
|
$day = 1;
|
|
} else {
|
|
$year--;
|
|
$month = 12;
|
|
$day = 1;
|
|
}
|
|
return Date_Calc::dateFormat($day, $month, $year, $format);
|
|
}
|
|
|
|
// }}}
|
|
// {{{ endOfPrevMonth()
|
|
|
|
/**
|
|
* Returns date of the last day of previous month for given date
|
|
*
|
|
* @param int $day the day of the month, default is current local day
|
|
* @param int $month the month, default is current local month
|
|
* @param int $year the year in four digit format, default is current local year
|
|
* @param string $format the string indicating how to format the output
|
|
*
|
|
* @return string the date in the desired format
|
|
*
|
|
* @access public
|
|
* @static
|
|
* @see Date_Calc::endOfMonthBySpan()
|
|
* @deprecated Method deprecated in Release 1.4.4
|
|
*/
|
|
function endOfPrevMonth($day = 0, $month = 0, $year = 0,
|
|
$format = DATE_CALC_FORMAT)
|
|
{
|
|
if (empty($year)) {
|
|
$year = Date_Calc::dateNow('%Y');
|
|
}
|
|
if (empty($month)) {
|
|
$month = Date_Calc::dateNow('%m');
|
|
}
|
|
if (empty($day)) {
|
|
$day = Date_Calc::dateNow('%d');
|
|
}
|
|
if ($month > 1) {
|
|
$month--;
|
|
} else {
|
|
$year--;
|
|
$month = 12;
|
|
}
|
|
$day = Date_Calc::daysInMonth($month, $year);
|
|
return Date_Calc::dateFormat($day, $month, $year, $format);
|
|
}
|
|
|
|
// }}}
|
|
// {{{ beginOfNextMonth()
|
|
|
|
/**
|
|
* Returns date of begin of next month of given date
|
|
*
|
|
* @param int $day the day of the month, default is current local day
|
|
* @param int $month the month, default is current local month
|
|
* @param int $year the year in four digit format, default is current local year
|
|
* @param string $format the string indicating how to format the output
|
|
*
|
|
* @return string the date in the desired format
|
|
*
|
|
* @access public
|
|
* @static
|
|
* @see Date_Calc::beginOfMonthBySpan()
|
|
* @deprecated Method deprecated in Release 1.4.4
|
|
*/
|
|
function beginOfNextMonth($day = 0, $month = 0, $year = 0,
|
|
$format = DATE_CALC_FORMAT)
|
|
{
|
|
if (empty($year)) {
|
|
$year = Date_Calc::dateNow('%Y');
|
|
}
|
|
if (empty($month)) {
|
|
$month = Date_Calc::dateNow('%m');
|
|
}
|
|
if (empty($day)) {
|
|
$day = Date_Calc::dateNow('%d');
|
|
}
|
|
if ($month < 12) {
|
|
$month++;
|
|
$day = 1;
|
|
} else {
|
|
$year++;
|
|
$month = 1;
|
|
$day = 1;
|
|
}
|
|
return Date_Calc::dateFormat($day, $month, $year, $format);
|
|
}
|
|
|
|
// }}}
|
|
// {{{ endOfNextMonth()
|
|
|
|
/**
|
|
* Returns date of the last day of next month of given date
|
|
*
|
|
* @param int $day the day of the month, default is current local day
|
|
* @param int $month the month, default is current local month
|
|
* @param int $year the year in four digit format, default is current local year
|
|
* @param string $format the string indicating how to format the output
|
|
*
|
|
* @return string the date in the desired format
|
|
*
|
|
* @access public
|
|
* @static
|
|
* @see Date_Calc::endOfMonthBySpan()
|
|
* @deprecated Method deprecated in Release 1.4.4
|
|
*/
|
|
function endOfNextMonth($day = 0, $month = 0, $year = 0,
|
|
$format = DATE_CALC_FORMAT)
|
|
{
|
|
if (empty($year)) {
|
|
$year = Date_Calc::dateNow('%Y');
|
|
}
|
|
if (empty($month)) {
|
|
$month = Date_Calc::dateNow('%m');
|
|
}
|
|
if (empty($day)) {
|
|
$day = Date_Calc::dateNow('%d');
|
|
}
|
|
if ($month < 12) {
|
|
$month++;
|
|
} else {
|
|
$year++;
|
|
$month = 1;
|
|
}
|
|
$day = Date_Calc::daysInMonth($month, $year);
|
|
return Date_Calc::dateFormat($day, $month, $year, $format);
|
|
}
|
|
|
|
// }}}
|
|
// {{{ beginOfMonthBySpan()
|
|
|
|
/**
|
|
* Returns date of the first day of the month in the number of months
|
|
* from the given date
|
|
*
|
|
* @param int $months the number of months from the date provided.
|
|
* Positive numbers go into the future.
|
|
* Negative numbers go into the past.
|
|
* 0 is the month presented in $month.
|
|
* @param string $month the month, default is current local month
|
|
* @param string $year the year in four digit format, default is the
|
|
* current local year
|
|
* @param string $format the string indicating how to format the output
|
|
*
|
|
* @return string the date in the desired format
|
|
*
|
|
* @access public
|
|
* @static
|
|
* @since Method available since Release 1.4.4
|
|
*/
|
|
function beginOfMonthBySpan($months = 0, $month = 0, $year = 0,
|
|
$format = DATE_CALC_FORMAT)
|
|
{
|
|
if (empty($year)) {
|
|
$year = Date_Calc::dateNow('%Y');
|
|
}
|
|
if (empty($month)) {
|
|
$month = Date_Calc::dateNow('%m');
|
|
}
|
|
if ($months > 0) {
|
|
// future month
|
|
$tmp_mo = $month + $months;
|
|
$month = $tmp_mo % 12;
|
|
if ($month == 0) {
|
|
$month = 12;
|
|
$year = $year + floor(($tmp_mo - 1) / 12);
|
|
} else {
|
|
$year = $year + floor($tmp_mo / 12);
|
|
}
|
|
} else {
|
|
// past or present month
|
|
$tmp_mo = $month + $months;
|
|
if ($tmp_mo > 0) {
|
|
// same year
|
|
$month = $tmp_mo;
|
|
} elseif ($tmp_mo == 0) {
|
|
// prior dec
|
|
$month = 12;
|
|
$year--;
|
|
} else {
|
|
// some time in a prior year
|
|
$month = 12 + ($tmp_mo % 12);
|
|
$year = $year + floor($tmp_mo / 12);
|
|
}
|
|
}
|
|
return Date_Calc::dateFormat(1, $month, $year, $format);
|
|
}
|
|
|
|
// }}}
|
|
// {{{ endOfMonthBySpan()
|
|
|
|
/**
|
|
* Returns date of the last day of the month in the number of months
|
|
* from the given date
|
|
*
|
|
* @param int $months the number of months from the date provided.
|
|
* Positive numbers go into the future.
|
|
* Negative numbers go into the past.
|
|
* 0 is the month presented in $month.
|
|
* @param string $month the month, default is current local month
|
|
* @param string $year the year in four digit format, default is the
|
|
* current local year
|
|
* @param string $format the string indicating how to format the output
|
|
*
|
|
* @return string the date in the desired format
|
|
*
|
|
* @access public
|
|
* @static
|
|
* @since Method available since Release 1.4.4
|
|
*/
|
|
function endOfMonthBySpan($months = 0, $month = 0, $year = 0,
|
|
$format = DATE_CALC_FORMAT)
|
|
{
|
|
if (empty($year)) {
|
|
$year = Date_Calc::dateNow('%Y');
|
|
}
|
|
if (empty($month)) {
|
|
$month = Date_Calc::dateNow('%m');
|
|
}
|
|
if ($months > 0) {
|
|
// future month
|
|
$tmp_mo = $month + $months;
|
|
$month = $tmp_mo % 12;
|
|
if ($month == 0) {
|
|
$month = 12;
|
|
$year = $year + floor(($tmp_mo - 1) / 12);
|
|
} else {
|
|
$year = $year + floor($tmp_mo / 12);
|
|
}
|
|
} else {
|
|
// past or present month
|
|
$tmp_mo = $month + $months;
|
|
if ($tmp_mo > 0) {
|
|
// same year
|
|
$month = $tmp_mo;
|
|
} elseif ($tmp_mo == 0) {
|
|
// prior dec
|
|
$month = 12;
|
|
$year--;
|
|
} else {
|
|
// some time in a prior year
|
|
$month = 12 + ($tmp_mo % 12);
|
|
$year = $year + floor($tmp_mo / 12);
|
|
}
|
|
}
|
|
return Date_Calc::dateFormat(Date_Calc::daysInMonth($month, $year),
|
|
$month, $year, $format);
|
|
}
|
|
|
|
// }}}
|
|
// {{{ firstOfMonthWeekday()
|
|
|
|
/**
|
|
* Find the day of the week for the first of the month of given date
|
|
*
|
|
* @param int $month the month, default is current local month
|
|
* @param int $year the year in four digit format, default is current local year
|
|
*
|
|
* @return int number of weekday for the first day, 0=Sunday
|
|
*
|
|
* @access public
|
|
* @static
|
|
*/
|
|
function firstOfMonthWeekday($month = 0, $year = 0)
|
|
{
|
|
if (empty($year)) {
|
|
$year = Date_Calc::dateNow('%Y');
|
|
}
|
|
if (empty($month)) {
|
|
$month = Date_Calc::dateNow('%m');
|
|
}
|
|
return Date_Calc::dayOfWeek('01', $month, $year);
|
|
}
|
|
|
|
// }}}
|
|
// {{{ NWeekdayOfMonth()
|
|
|
|
/**
|
|
* Calculates the date of the Nth weekday of the month,
|
|
* such as the second Saturday of January 2000
|
|
*
|
|
* @param int $week the number of the week to get
|
|
* (1 = first, etc. Also can be 'last'.)
|
|
* @param int $dow the day of the week (0 = Sunday)
|
|
* @param int $month the month
|
|
* @param int $year the year. Use the complete year instead of the
|
|
* abbreviated version. E.g. use 2005, not 05.
|
|
* Do not add leading 0's for years prior to 1000.
|
|
* @param string $format the string indicating how to format the output
|
|
*
|
|
* @return string the date in the desired format
|
|
*
|
|
* @access public
|
|
* @static
|
|
*/
|
|
function NWeekdayOfMonth($week, $dow, $month, $year,
|
|
$format = DATE_CALC_FORMAT)
|
|
{
|
|
if (is_numeric($week)) {
|
|
$DOW1day = ($week - 1) * 7 + 1;
|
|
$DOW1 = Date_Calc::dayOfWeek($DOW1day, $month, $year);
|
|
$wdate = ($week - 1) * 7 + 1 + (7 + $dow - $DOW1) % 7;
|
|
if ($wdate > Date_Calc::daysInMonth($month, $year)) {
|
|
return -1;
|
|
} else {
|
|
return Date_Calc::dateFormat($wdate, $month, $year, $format);
|
|
}
|
|
} elseif ($week == 'last' && $dow < 7) {
|
|
$lastday = Date_Calc::daysInMonth($month, $year);
|
|
$lastdow = Date_Calc::dayOfWeek($lastday, $month, $year);
|
|
$diff = $dow - $lastdow;
|
|
if ($diff > 0) {
|
|
return Date_Calc::dateFormat($lastday - (7 - $diff), $month,
|
|
$year, $format);
|
|
} else {
|
|
return Date_Calc::dateFormat($lastday + $diff, $month,
|
|
$year, $format);
|
|
}
|
|
} else {
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
// }}}
|
|
// {{{ isValidDate()
|
|
|
|
/**
|
|
* Returns true for valid date, false for invalid date
|
|
*
|
|
* @param int $day the day of the month
|
|
* @param int $month the month
|
|
* @param int $year the year. Use the complete year instead of the
|
|
* abbreviated version. E.g. use 2005, not 05.
|
|
* Do not add leading 0's for years prior to 1000.
|
|
*
|
|
* @return boolean
|
|
*
|
|
* @access public
|
|
* @static
|
|
*/
|
|
function isValidDate($day, $month, $year)
|
|
{
|
|
if ($year < 0 || $year > 9999) {
|
|
return false;
|
|
}
|
|
if (!checkdate($month, $day, $year)) {
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
// }}}
|
|
// {{{ isLeapYear()
|
|
|
|
/**
|
|
* Returns true for a leap year, else false
|
|
*
|
|
* @param int $year the year. Use the complete year instead of the
|
|
* abbreviated version. E.g. use 2005, not 05.
|
|
* Do not add leading 0's for years prior to 1000.
|
|
*
|
|
* @return boolean
|
|
*
|
|
* @access public
|
|
* @static
|
|
*/
|
|
function isLeapYear($year = 0)
|
|
{
|
|
if (empty($year)) {
|
|
$year = Date_Calc::dateNow('%Y');
|
|
}
|
|
if (preg_match('/\D/', $year)) {
|
|
return false;
|
|
}
|
|
if ($year < 1000) {
|
|
return false;
|
|
}
|
|
if ($year < 1582) {
|
|
// pre Gregorio XIII - 1582
|
|
return ($year % 4 == 0);
|
|
} else {
|
|
// post Gregorio XIII - 1582
|
|
return (($year % 4 == 0) && ($year % 100 != 0)) || ($year % 400 == 0);
|
|
}
|
|
}
|
|
|
|
// }}}
|
|
// {{{ isFutureDate()
|
|
|
|
/**
|
|
* Determines if given date is a future date from now
|
|
*
|
|
* @param int $day the day of the month
|
|
* @param int $month the month
|
|
* @param int $year the year. Use the complete year instead of the
|
|
* abbreviated version. E.g. use 2005, not 05.
|
|
* Do not add leading 0's for years prior to 1000.
|
|
*
|
|
* @return boolean
|
|
*
|
|
* @access public
|
|
* @static
|
|
*/
|
|
function isFutureDate($day, $month, $year)
|
|
{
|
|
$this_year = Date_Calc::dateNow('%Y');
|
|
$this_month = Date_Calc::dateNow('%m');
|
|
$this_day = Date_Calc::dateNow('%d');
|
|
|
|
if ($year > $this_year) {
|
|
return true;
|
|
} elseif ($year == $this_year) {
|
|
if ($month > $this_month) {
|
|
return true;
|
|
} elseif ($month == $this_month) {
|
|
if ($day > $this_day) {
|
|
return true;
|
|
}
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
// }}}
|
|
// {{{ isPastDate()
|
|
|
|
/**
|
|
* Determines if given date is a past date from now
|
|
*
|
|
* @param int $day the day of the month
|
|
* @param int $month the month
|
|
* @param int $year the year. Use the complete year instead of the
|
|
* abbreviated version. E.g. use 2005, not 05.
|
|
* Do not add leading 0's for years prior to 1000.
|
|
*
|
|
* @return boolean
|
|
*
|
|
* @access public
|
|
* @static
|
|
*/
|
|
function isPastDate($day, $month, $year)
|
|
{
|
|
$this_year = Date_Calc::dateNow('%Y');
|
|
$this_month = Date_Calc::dateNow('%m');
|
|
$this_day = Date_Calc::dateNow('%d');
|
|
|
|
if ($year < $this_year) {
|
|
return true;
|
|
} elseif ($year == $this_year) {
|
|
if ($month < $this_month) {
|
|
return true;
|
|
} elseif ($month == $this_month) {
|
|
if ($day < $this_day) {
|
|
return true;
|
|
}
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
// }}}
|
|
// {{{ dateDiff()
|
|
|
|
/**
|
|
* Returns number of days between two given dates
|
|
*
|
|
* @param int $day1 the day of the month
|
|
* @param int $month1 the month
|
|
* @param int $year1 the year. Use the complete year instead of the
|
|
* abbreviated version. E.g. use 2005, not 05.
|
|
* Do not add leading 0's for years prior to 1000.
|
|
* @param int $day2 the day of the month
|
|
* @param int $month2 the month
|
|
* @param int $year2 the year. Use the complete year instead of the
|
|
* abbreviated version. E.g. use 2005, not 05.
|
|
* Do not add leading 0's for years prior to 1000.
|
|
*
|
|
* @return int the absolute number of days between the two dates.
|
|
* If an error occurs, -1 is returned.
|
|
*
|
|
* @access public
|
|
* @static
|
|
*/
|
|
function dateDiff($day1, $month1, $year1, $day2, $month2, $year2)
|
|
{
|
|
if (!Date_Calc::isValidDate($day1, $month1, $year1)) {
|
|
return -1;
|
|
}
|
|
if (!Date_Calc::isValidDate($day2, $month2, $year2)) {
|
|
return -1;
|
|
}
|
|
return abs(Date_Calc::dateToDays($day1, $month1, $year1)
|
|
- Date_Calc::dateToDays($day2, $month2, $year2));
|
|
}
|
|
|
|
// }}}
|
|
// {{{ compareDates()
|
|
|
|
/**
|
|
* Compares two dates
|
|
*
|
|
* @param int $day1 the day of the month
|
|
* @param int $month1 the month
|
|
* @param int $year1 the year. Use the complete year instead of the
|
|
* abbreviated version. E.g. use 2005, not 05.
|
|
* Do not add leading 0's for years prior to 1000.
|
|
* @param int $day2 the day of the month
|
|
* @param int $month2 the month
|
|
* @param int $year2 the year. Use the complete year instead of the
|
|
* abbreviated version. E.g. use 2005, not 05.
|
|
* Do not add leading 0's for years prior to 1000.
|
|
*
|
|
* @return int 0 if the dates are equal. 1 if date 1 is later, -1 if
|
|
* date 1 is earlier.
|
|
*
|
|
* @access public
|
|
* @static
|
|
*/
|
|
function compareDates($day1, $month1, $year1, $day2, $month2, $year2)
|
|
{
|
|
$ndays1 = Date_Calc::dateToDays($day1, $month1, $year1);
|
|
$ndays2 = Date_Calc::dateToDays($day2, $month2, $year2);
|
|
if ($ndays1 == $ndays2) {
|
|
return 0;
|
|
}
|
|
return ($ndays1 > $ndays2) ? 1 : -1;
|
|
}
|
|
|
|
// }}}
|
|
}
|
|
|
|
// }}}
|
|
|
|
/*
|
|
* Local variables:
|
|
* mode: php
|
|
* tab-width: 4
|
|
* c-basic-offset: 4
|
|
* c-hanging-comment-ender-p: nil
|
|
* End:
|
|
*/
|
|
?>
|