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- <?php
- /* vim: set expandtab tabstop=4 shiftwidth=4: */
- //
- // +----------------------------------------------------------------------+
- // | PHP Version 4 |
- // +----------------------------------------------------------------------+
- // | Copyright (c) 1997-2002 The PHP Group |
- // +----------------------------------------------------------------------+
- // | This source file is subject to version 2.02 of the PHP license, |
- // | that is bundled with this package in the file LICENSE, and is |
- // | available at through the world-wide-web at |
- // | http://www.php.net/license/3_0.txt. |
- // | If you did not receive a copy of the PHP license and are unable to |
- // | obtain it through the world-wide-web, please send a note to |
- // | license@php.net so we can mail you a copy immediately. |
- // +----------------------------------------------------------------------+
- // | Authors: Harry Fuecks <hfuecks@phppatterns.com> |
- // +----------------------------------------------------------------------+
- //
- // $Id: UnixTS.php,v 1.9 2004/08/20 20:00:55 quipo Exp $
- //
- /**
- * @package Calendar
- * @version $Id: UnixTS.php,v 1.9 2004/08/20 20:00:55 quipo Exp $
- */
- /**
- * Performs calendar calculations based on the PHP date() function and
- * Unix timestamps (using PHP's mktime() function).
- * @package Calendar
- * @access protected
- */
- class Calendar_Engine_UnixTS /* implements Calendar_Engine_Interface */
- {
- /**
- * Makes sure a given timestamp is only ever parsed once
- * <pre>
- * array (
- * [0] => year (e.g 2003),
- * [1] => month (e.g 9),
- * [2] => day (e.g 6),
- * [3] => hour (e.g 14),
- * [4] => minute (e.g 34),
- * [5] => second (e.g 45),
- * [6] => num days in month (e.g. 31),
- * [7] => week in year (e.g. 50),
- * [8] => day in week (e.g. 0 for Sunday)
- * )
- * </pre>
- * Uses a static variable to prevent date() being used twice
- * for a date which is already known
- * @param int Unix timestamp
- * @return array
- * @access protected
- */
- function stampCollection($stamp)
- {
- static $stamps = array();
- if ( !isset($stamps[$stamp]) ) {
- $date = @date('Y n j H i s t W w',$stamp);
- $stamps[$stamp] = sscanf($date, "%d %d %d %d %d %d %d %d %d");
- }
- return $stamps[$stamp];
- }
-
- /**
- * Returns a numeric year given a timestamp
- * @param int Unix timestamp
- * @return int year (e.g. 2003)
- * @access protected
- */
- function stampToYear($stamp)
- {
- $date = Calendar_Engine_UnixTS::stampCollection($stamp);
- return (int)$date[0];
- }
-
- /**
- * Returns a numeric month given a timestamp
- * @param int Unix timestamp
- * @return int month (e.g. 9)
- * @access protected
- */
- function stampToMonth($stamp)
- {
- $date = Calendar_Engine_UnixTS::stampCollection($stamp);
- return (int)$date[1];
- }
-
- /**
- * Returns a numeric day given a timestamp
- * @param int Unix timestamp
- * @return int day (e.g. 15)
- * @access protected
- */
- function stampToDay($stamp)
- {
- $date = Calendar_Engine_UnixTS::stampCollection($stamp);
- return (int)$date[2];
- }
-
- /**
- * Returns a numeric hour given a timestamp
- * @param int Unix timestamp
- * @return int hour (e.g. 13)
- * @access protected
- */
- function stampToHour($stamp)
- {
- $date = Calendar_Engine_UnixTS::stampCollection($stamp);
- return (int)$date[3];
- }
-
- /**
- * Returns a numeric minute given a timestamp
- * @param int Unix timestamp
- * @return int minute (e.g. 34)
- * @access protected
- */
- function stampToMinute($stamp)
- {
- $date = Calendar_Engine_UnixTS::stampCollection($stamp);
- return (int)$date[4];
- }
-
- /**
- * Returns a numeric second given a timestamp
- * @param int Unix timestamp
- * @return int second (e.g. 51)
- * @access protected
- */
- function stampToSecond($stamp)
- {
- $date = Calendar_Engine_UnixTS::stampCollection($stamp);
- return (int)$date[5];
- }
-
- /**
- * Returns a timestamp
- * @param int year (2003)
- * @param int month (9)
- * @param int day (13)
- * @param int hour (13)
- * @param int minute (34)
- * @param int second (53)
- * @return int Unix timestamp
- * @access protected
- */
- function dateToStamp($y, $m, $d, $h=0, $i=0, $s=0)
- {
- static $dates = array();
- if ( !isset($dates[$y][$m][$d][$h][$i][$s]) ) {
- $dates[$y][$m][$d][$h][$i][$s] = @mktime($h, $i, $s, $m, $d, $y);
- }
- return $dates[$y][$m][$d][$h][$i][$s];
- }
-
- /**
- * The upper limit on years that the Calendar Engine can work with
- * @return int (2037)
- * @access protected
- */
- function getMaxYears()
- {
- return 2037;
- }
-
- /**
- * The lower limit on years that the Calendar Engine can work with
- * @return int (1970 if it's Windows and 1902 for all other OSs)
- * @access protected
- */
- function getMinYears()
- {
- return $min = strpos(PHP_OS, 'WIN') === false ? 1902 : 1970;
- }
-
- /**
- * Returns the number of months in a year
- * @return int (12)
- * @access protected
- */
- function getMonthsInYear($y=null)
- {
- return 12;
- }
-
- /**
- * Returns the number of days in a month, given year and month
- * @param int year (2003)
- * @param int month (9)
- * @return int days in month
- * @access protected
- */
- function getDaysInMonth($y, $m)
- {
- $stamp = Calendar_Engine_UnixTS::dateToStamp($y,$m,1);
- $date = Calendar_Engine_UnixTS::stampCollection($stamp);
- return $date[6];
- }
-
- /**
- * Returns numeric representation of the day of the week in a month,
- * given year and month
- * @param int year (2003)
- * @param int month (9)
- * @return int from 0 to 6
- * @access protected
- */
- function getFirstDayInMonth($y, $m)
- {
- $stamp = Calendar_Engine_UnixTS::dateToStamp($y,$m,1);
- $date = Calendar_Engine_UnixTS::stampCollection($stamp);
- return $date[8];
- }
-
- /**
- * Returns the number of days in a week
- * @param int year (2003)
- * @param int month (9)
- * @param int day (4)
- * @return int (7)
- * @access protected
- */
- function getDaysInWeek($y=NULL, $m=NULL, $d=NULL)
- {
- return 7;
- }
-
- /**
- * Returns the number of the week in the year (ISO-8601), given a date
- * @param int year (2003)
- * @param int month (9)
- * @param int day (4)
- * @return int week number
- * @access protected
- */
- function getWeekNInYear($y, $m, $d)
- {
- $stamp = Calendar_Engine_UnixTS::dateToStamp($y,$m,$d);
- $date = Calendar_Engine_UnixTS::stampCollection($stamp);
- return $date[7];
- }
-
- /**
- * Returns the number of the week in the month, given a date
- * @param int year (2003)
- * @param int month (9)
- * @param int day (4)
- * @param int first day of the week (default: monday)
- * @return int week number
- * @access protected
- */
- function getWeekNInMonth($y, $m, $d, $firstDay=1)
- {
- $weekEnd = ($firstDay == 0) ? $this->getDaysInWeek()-1 : $firstDay-1;
- $end_of_week = 1;
- while (@date('w', @mktime(0, 0, 0, $m, $end_of_week, $y)) != $weekEnd) {
- ++$end_of_week; //find first weekend of the month
- }
- $w = 1;
- while ($d > $end_of_week) {
- ++$w;
- $end_of_week += $this->getDaysInWeek();
- }
- return $w;
- }
-
- /**
- * Returns the number of weeks in the month
- * @param int year (2003)
- * @param int month (9)
- * @param int first day of the week (default: monday)
- * @return int weeks number
- * @access protected
- */
- function getWeeksInMonth($y, $m, $firstDay=1)
- {
- $FDOM = $this->getFirstDayInMonth($y, $m);
- if ($FDOM == 0) {
- $FDOM = $this->getDaysInWeek();
- }
- if ($FDOM > $firstDay) {
- $daysInTheFirstWeek = $this->getDaysInWeek() - $FDOM + $firstDay;
- $weeks = 1;
- } else {
- $daysInTheFirstWeek = $firstDay - $FDOM;
- $weeks = 0;
- }
- $daysInTheFirstWeek %= $this->getDaysInWeek();
- return (int)(ceil(($this->getDaysInMonth($y, $m) - $daysInTheFirstWeek) /
- $this->getDaysInWeek()) + $weeks);
- }
-
- /**
- * Returns the number of the day of the week (0=sunday, 1=monday...)
- * @param int year (2003)
- * @param int month (9)
- * @param int day (4)
- * @return int weekday number
- * @access protected
- */
- function getDayOfWeek($y, $m, $d)
- {
- $stamp = Calendar_Engine_UnixTS::dateToStamp($y,$m,$d);
- $date = Calendar_Engine_UnixTS::stampCollection($stamp);
- return $date[8];
- }
-
- /**
- * Returns a list of integer days of the week beginning 0
- * @param int year (2003)
- * @param int month (9)
- * @param int day (4)
- * @return array (0,1,2,3,4,5,6) 1 = Monday
- * @access protected
- */
- function getWeekDays($y=NULL, $m=NULL, $d=NULL)
- {
- return array(0, 1, 2, 3, 4, 5, 6);
- }
-
- /**
- * Returns the default first day of the week
- * @param int year (2003)
- * @param int month (9)
- * @param int day (4)
- * @return int (default 1 = Monday)
- * @access protected
- */
- function getFirstDayOfWeek($y=NULL, $m=NULL, $d=NULL)
- {
- return 1;
- }
-
- /**
- * Returns the number of hours in a day
- * @return int (24)
- * @access protected
- */
- function getHoursInDay($y=null,$m=null,$d=null)
- {
- return 24;
- }
-
- /**
- * Returns the number of minutes in an hour
- * @return int (60)
- * @access protected
- */
- function getMinutesInHour($y=null,$m=null,$d=null,$h=null)
- {
- return 60;
- }
-
- /**
- * Returns the number of seconds in a minutes
- * @return int (60)
- * @access protected
- */
- function getSecondsInMinute($y=null,$m=null,$d=null,$h=null,$i=null)
- {
- return 60;
- }
- }
- ?>