PHP Classes

File: Date.class.php

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File: Date.class.php
Role: Class source
Content type: text/plain
Description: class Date
Class: phpDateTime
Manipulating dates, times, time intervals
Author: By
Last change: pls refer to changelog on sourceforge
Date: 18 years ago
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<?php /** * contains class Date and other date functions * * @copyright Copyright (C) 2003-2005 Sebastian Mendel <info at sebastianmendel dot de> * * @license http://www.opensource.org/licenses/lgpl-license.php * GNU Lesser General Public License - LGPL * * @package phpDateTime * @author Sebastian Mendel <info at sebastianmendel dot de> * @version $Id: Date.class.php,v 1.33 2005/04/21 10:06:20 cybot_tm Exp $ * @source $Source: /cvsroot/phpdatetime/phpDateTime/Date.class.php,v $ */ /** * defines parameters */ define('DATE_EMPTY_IF_NULL', 0); /** * Class Date * * usage: * <code> * $row = mysql_fetch_assoc(mysql_query('SELECT * FROM `table` LIMIT 1')); * $date = new Date($row['date']); // $row['date'] = MySQL-TimeStamp, Unix-Timestamp or DateTime * echo $date->get(); // returns: 2004-05-09 * </code> * * @copyright Copyright (C) 2003, 2004 Sebastian Mendel <info at sebastianmendel dot de> * * @license http://www.opensource.org/licenses/lgpl-license.php * GNU Lesser General Public License - LGPL * * @package phpDateTime * @author Sebastian Mendel <info@sebastianmendel.de> */ class Date { /** * the day * @access protected * @var integer */ var $day; /** * the month * @access protected * @var integer */ var $month; /** * the year * @access protected * @var integer */ var $year; /** * century-divider * * if the given date-string has a 2-digit-year, then all years >= $century_divider are before 2000 * and all years < $century_divider after 2000, * with a default of 70 a 2-digit-year can be from 1970 to 2069 * * @access protected * @var integer **/ var $century_divider = 70; /** * constructor * usage: * <code> * $date = new Date(); * echo $date->get(); // returns: 2004-05-09 (current Date) * * $date = new Date(0); * echo $date->get(); // returns: 0000-00-00 * * $date = new Date('24.12.1987'); * echo $date->get(); // returns: 1987-12-24 * </code> * * @access protected * @uses Date::set() as return value * @param string|integer|object $date * @return Date::set() */ function Date( $date = NULL ) { return $this->set( $date ); } /** * returns true if date is 0 (0000-00-00), otherwise false * usage: * <code> * if ( $date->isNull() ) * { * echo 'unknown/not set'; * } * else * { * echo $date; * } * </code> * * @access public * @uses Date::getDay() to compare against 0 * @uses Date::getMonth() to compare against 0 * @uses Date::getYear() to compare against 0 * @return boolean true or false * @todo make static */ function isNull() { if ( $this->getDay() + $this->getMonth() + $this->getYear() === 0 ) { return true; } return false; } /** * returns Date as string in ISO format (YYYY-MM-DD) * * @static * @access public * @uses Date::getAsIso() as return value * @param mixed $date * @return string Date::getAsIso() */ function get( $date = NULL ) { if ( NULL === $date ) { return $this->getAsIso( $date ); } return Date::getAsIso( $date ); } /** * day handler, returns day * * @access public * @uses Date::$day as return value * @return Date::$day * @todo make static */ function getDay() { return $this->day; } /** * month handler, returns month * * @access public * @uses Date::$month as return value * @return Date::$month * @todo make static */ function getMonth() { return $this->month; } /** * year handler, returns year * * @access public * @uses Date::$year as return value * @return Date::$year * @todo make static */ function getYear() { return $this->year; } /** * century_divider handler, returns century-divider * * @access public * @uses Date::$century_divider as return value * @return Date::$century_divider */ function getCenturyDivider() { return $this->century_divider; } /** * returns number of day in week * 0 = Sunday, 1 = Monday, ..., 6 = Saturday * * @access public * @uses Date::getAsStr() as return value * @return Date::getAsStr() * @todo make static */ function getWeekDay() { return (int) $this->getAsStr('w'); } /** * returns ISO8601 weeknumber * * <code> * echo Date::getWeek( '2003-12-30' ); // prints 1 * echo Date::getWeek( '2004-06-30' ); // prints 27 * echo Date::getWeek( '2005-01-02' ); // prints 52 * </code> * * @static * @access public * * @uses getAsStr() * * @param mixed $date * * @return integer weeknumber */ function getWeek( $date = NULL ) { if ( NULL === $date ) { return (int) $this->getAsStr('W'); } $date =& new Date( $date ); return $date->getWeek( NULL ); } /** * returns ISO8601 Year of the Week * * <code> * echo Date::getWeekYear( '2003-12-30' ); // prints 2004 * echo Date::getWeekYear( '2005-01-02' ); // prints 2004 * </code> * * @since 2004-06-30 * * @static * @access public * * @param mixed date * * @return integer year */ function getWeekYear() { if ( NULL === $date ) { if ( $this->getMonth() === 12 && $this->getWeek() === 1 ) { return $this->getYear() + 1; } elseif ( $this->getMonth() === 1 && $this->getWeek() > 50 ) { return $this->getYear() - 1; } else { return $this->getYear(); } } $date =& new Date( $date ); return $date->getWeekYear( NULL ); } /** * returns year-week (YYYYWW) * <code> * echo Date::getYearWeek( '2004-06-29' ); // prints 200427 * </code> * * @version 2004 * @version 2004-06-30 * * @uses sprintf() * @uses Date::getYear() * @uses Date::getWeek() * * @static * @access public * * @param mixed $date * * @return string yearweek */ function getYearWeek( $date = NULL ) { if ( NULL === $date ) { return sprintf('%04d%02d', $this->getYear(), $this->getWeek()); } $date =& new Date( $date ); return $date->getYearWeek( NULL ); } /** * returns ISO8601 Week Date reduced extended format * if $reduced true in reduced format, without day * if $extended true in extended format, '-' between parts * * <code> * echo Date::getWeekDate( '2003-12-30' ); // prints 2004-W01 * echo Date::getWeekDate( '2004-06-29' ); // prints 2004-W27 * echo Date::getWeekDate( '2004-06-29', false, false ); // prints 2004W272 * </code> * * @since 2004-06-29 * @version 2004-06-30 * * @uses sprintf() * @uses Date::getWeekYear() * @uses Date::getWeek() * * @static * @access public * * @param mixed $date * @param boolean $reduced * @param boolean $extended * * @return string Week Date */ function getWeekDate( $date = NULL, $reduced = true, $extended = true ) { if ( NULL === $date ) { if ( $extended ) { $extended = '-'; } else { $extended = ''; } $week_date = sprintf('%04d%sW%02d', $this->getWeekYear(), $extended, $this->getWeek()); if ( ! $reduced ) { $week_date .= $extended . $this->getWeekDay(); } return $week_date; } $date =& new Date( $date ); return $date->getWeekDate( NULL, $reduced, $extended ); } /** * returns number of days in current month * * @access public * @uses getAsStr() * @return integer days_in_month * @todo make static */ function getDaysInMonth() { return (int) $this->getAsStr('t'); } /** * returns Date formated according to native php date()-function * * @access public * @uses Date::getAsTs() * @uses date() * @param string $format * @return string Formated Date * @todo make static */ function getAsStr( $format ) { return date($format, $this->getAsTs()); } /** * returns abbreviated month name according to the current locale * * @deprecated * * @access public * @return string abbreviated monthname * @since v1.23 * @uses Date::getAsLcStr() * @todo make static */ function getLcMonthAbr() { return $this->getMonthNameAbbr(); } /** * returns abbreviated month name according to the current locale * * @access public * @return string abbreviated monthname * @since v1.27 * @uses Date::getAsLcStr() * @todo make static */ function getMonthNameAbbr() { return $this->getAsLcStr('%b'); } /** * returns weekday name according to the current locale * * @access public * @return string weekday_name * @since v1.27 * @uses Date::getAsLcStr() * @todo make static */ function getDayName() { return $this->getAsLcStr('%A'); } /** * returns abbreviated weekday name according to the current locale * * @since 2004-06-30 * @todo make static * * @uses Date::getAsLcStr() * @access public * * @return string abbreviated weekday_name */ function getDayNameAbbr() { return $this->getAsLcStr('%a'); } /** * Returns a string formatted according to the given format string * * @access public * @since v1.23 * @param string $format * @see strftime() * @uses strftime() * @return string date * @todo make static */ function getAsLcStr( $format ) { return strftime( $format, $this->getAsTs() ); } /** * returns Date as string in ISO format (YYYY-MM-DD) * * @access public * @static * @param mixed $date * @return string date * @since v1.0 * @uses sprintf() * @uses Date::getYear() * @uses Date::getMonth() * @uses Date::getDay() * @todo make static */ function getAsIso( $date = NULL ) { if ( NULL === $date ) { if ( isset( $this ) ) { return sprintf("%04d-%02d-%02d", $this->getYear(), $this->getMonth(), $this->getDay()); } $date = time(); } $date = new Date( $date ); return $date->getAsIso(); } /** * returns Date as string in DIN format (DD.MM.YYYY) * if display_null = 1/true and IsNull() it returns 00.00.0000 otherwise an empty string * * @access public * @static * @param mixed $date * @return string date * @since v1.0 * @uses sprintf() * @uses Date::getYear() * @uses Date::getMonth() * @uses Date::getDay() */ function getAsDin( $date = NULL ) { if ( NULL === $date ) { if ( isset( $this ) ) { return sprintf("%02d.%02d.%04d", $this->getDay(), $this->getMonth(), $this->getYear()); } $date = time(); } $date = new Date( $date ); return $date->getAsDin(); } /** * returns Date as string in US format (mm/dd/yyyy) * * @access public * @static * @param mixed $date * @return string date * @since v1.0 * @uses sprintf() * @uses Date::getYear() * @uses Date::getMonth() * @uses Date::getDay() */ function getAsAmi( $date = NULL ) { if ( NULL === $date ) { if ( isset( $this ) ) { return sprintf("%02d/%02d/%04d", $this->getMonth(), $this->getDay(), $this->getYear()); } $date = time(); } $date = new Date( $date ); return $date->getAsAmi(); } /** * returns Date as timestamp * * @access public * @static * @param mixed $date * @return int unix-timestamp * @since v1.5 * * @uses mktime() * @uses Date::getYear() * @uses Date::getMonth() * @uses Date::getDay() */ function getAsTs( $date = NULL ) { if ( NULL === $date ) { if ( isset( $this ) ) { return mktime(0, 0, 0, $this->getMonth(), $this->getDay(), $this->getYear()); } $date = time(); } $date = new Date( $date ); return $date->getAsTs(); } /** * Sets date from given date-string, date-object or unix-timestamp * return true on success, otherwise false * * @access public * @param mixed $date * @return string new date * @since v1.0 * @version 2005-01-26 * * @uses preg_match() * @uses is_numeric() * @uses time() * @uses trigger_error() * @uses E_USER_WARNING * @uses Date::setFromTs() * @uses Date::setFromDin() * @uses Date::setFromIso() * @uses Date::setFromAmi() */ function set( $date = NULL ) { if ( NULL === $date ) { return $this->setFromTs( time() ); } if ( is_numeric( $date ) ) { return $this->setFromTs( $date ); } if ( is_object( $date ) && get_class( $date ) == 'date' ) { return $this->setFromIso( $date->getAsIso() ); } if ( preg_match( '|\.|', $date ) ) { // date in form d.m.y return $this->setFromDin( $date ); } if ( preg_match( '|\/|', $date ) ) { // date is in form m/d/y return $this->setFromAmi( $date ); } if ( preg_match( '|\-|', $date ) ) { // date is in form YYYY-MM-DD return $this->setFromIso( $date ); } if ( empty( $date ) ) { // date is '', so we use 0000-00-00 return $this->setFromIso( '0000-00-00' ); } trigger_error( 'unknown date-format: ' . var_export( $date, true ) . '(' . $_SERVER['REQUEST_URI'] . ')', E_USER_WARNING ); return $this->setFromTs( time() ); } /** * @access public * @param integer $day of month 0 to 31 * @since v1.0 * * @uses Date::$day */ function setDay( $day ) { $this->day = (int) $day; return true; } /** * @access public * @param integer $month 0 to 12 * @since v1.0 * * @uses Date::$month */ function setMonth( $month ) { $this->month = (int) $month; return true; } /** * @access public * @param integer $year (with century) * @since v1.0 * @change v1.25 - added support for 2-digit-years * * @uses strlen() * @uses Date::getCenturyDivider() * @uses Date::$year */ function setYear( $year ) { if ( strlen( $year ) == 2 ) { if ( $year >= $this->getCenturyDivider() ) { $year += 1900; } else { $year += 2000; } } $this->year = (int) $year; return true; } /** * @access public * @param integer $century_divider * @since v1.25 * * @uses Date::$century_divider */ function setCenturyDivider( $century_divider ) { if ( (int) $century_divider < 0 || (int) $century_divider > 99 ) { // not in range return false; } $this->century_divider = (int) $century_divider; return true; } /** * Sets date from timestamp * * @access public * @param integer $timestamp * @since v1.3 * @version 2004-06-30 * * @uses date() * @uses Date::setYear() * @uses Date::setMonth() * @uses Date::setDay() */ function setFromTs( $timestamp ) { // value must be some sort of Timestamp UNIX or MySQL < 4.1 // MySQL-Timestamp Values $YY = '([0-9]{2,4})'; // = 00 - 9999 $MM = '(0[0-9]{1}|1[0-2]{1})'; // = 00 - 12 $DD = '([0-2]{1}[0-9]{1}|30|31)'; // = 00 - 31 $HH = '([0-1]{1}[0-9]{1}|2[0-3]{1})'; // = 00 - 23 $SS = '([0-5]{1}[0-9]{1})'; // = 00 - 59 // MySQL-TIMESTAMP(14) YY(YY)MMDDHHMMSS // MySQL-TIMESTAMP(12) YYMMDDHHMMSS // MySQL-TIMESTAMP(10) YYMMDDHHMM // MySQL-TIMESTAMP(8) YYYYMMDD // MySQL-TIMESTAMP(6) YYMMDD // MySQL-TIMESTAMP(4) YYMM // MySQL-TIMESTAMP(2) YY if ( preg_match('^' . $YY . '(' . $MM . '(' . $DD . '(' . $HH . $SS . '(' . $SS . ')?)?)?)?$', $timestamp, $date_parts ) ) { $this->setDay($date_parts[3]); $this->setMonth($date_parts[2]); $this->setYear($date_parts[1]); } // a UNIX-TimeStamp ... ? elseif ( $timestamp > 0 ) { $this->setFromUnixTimestamp( $timestamp ); } } /** * sets date from given unix timestamp * * @access public * @param int $unix_timestamp * @since 2004-06-30 * * @uses date() * @uses Date::setYear() * @uses Date::setMonth() * @uses Date::setDay() */ function setFromUnixTimestamp( $unix_timestamp ) { $this->setDay( date('d', $unix_timestamp) ); $this->setMonth( date('m', $unix_timestamp) ); $this->setYear( date('Y', $unix_timestamp) ); } /** * Sets date from DIN format (DD.MM.YYYY or D.M.YY) * * @access public * @param string $datestring * @since v1.0 * * @uses explode() * @uses Date::setYear() * @uses Date::setMonth() * @uses Date::setDay() */ function setFromDin( $datestring ) { $datestring = trim( $datestring ); // cut time $date = explode(' ', $datestring); // split date parts dd.mm.yy $date = explode('.', $date[0]); $this->setDay($date[0]); $this->setMonth($date[1]); $this->setYear($date[2]); } /** * Sets date from US format: month/day/year * / can be any non-numeric character * m/d/y or m-d-y or m.d.y or m d y * * @access public * @param string $datestring * @since v1.0 * @version 2004-08-03 * * @uses explode() * @uses Date::setYear() * @uses Date::setMonth() * @uses Date::setDay() */ function setFromAmi( $datestring ) { //$date = explode('/', $datestring); // supports any non-numeric character between date parts $date = preg_split( '/[^0-9]+/', $datestring ); /* removed - now in SetYear() if ( strlen($date[2]) === 2 ) { $date[2] = ( ((int) strftime("%C")) * 100) + (int) $date[2]; } */ $this->setDay( $date[1] ); $this->setMonth( $date[0] ); $this->setYear( $date[2] ); return $this->get(); } /** * Sets date from ISO format (YYYY-MM-DD) * * @access public * @param string $datestring * @since v1.0 * * @uses explode() * @uses Date::setYear() * @uses Date::setMonth() * @uses Date::setDay() */ function setFromIso( $datestring ) { $date = explode('-', $datestring); /* removed - now in SetYear() if ( strlen($date[2]) === 2 ) { $date[2] = ( ((int) strftime("%C")) * 100) + (int) $date[2]; } */ $this->setDay($date[2]); $this->setMonth($date[1]); $this->setYear($date[0]); } /** * Sets date to first day of week * * @access public * @param integer $start_of_week 0 = Sunnday, 1 = Monday * @since v1.5 * * @uses date() * @uses Date::getAsTs() * @uses Date::addDay() */ function setToStartOfWeek( $start_of_week = 1 ) { // get weekday-number $weekday_number = date('w', $this->getAsTs()) - $start_of_week; if ( $weekday_number === -1 ) { // weekday-number is negative, ($start_of_week was 1 and day is Sunday!) $weekday_number = 6; } return $this->AddDay(-1 * $weekday_number); } /** * returns date for first day of week * * @access public * @param mixed $date * @param integer $start_of_week 0 = Sunday, 1 = Monday * @since v1.0 * * @static if called with first arguments not NULL * * @uses date() * @uses Date::getAsTs() * @uses Date::addDay() */ function getStartOfWeek( $date = NULL, $start_of_week = 1 ) { if ( NULL === $date ) { $weekday_number = date('w', $this->getAsTs()) - $start_of_week; if ( $weekday_number < 0 ) { // weekday-number is negative, ($start_of_week was 1 and day is Sunday!) $weekday_number += 7; } return $this->AddDay( -1 * $weekday_number, $this ); } $date = new Date( $date ); return $date->getStartOfWeek( NULL, $start_of_week ); } /** * alias for Date::getLastWeek() * * @param mixed $date * @param integer $start_of_week 0 = Sunday, 1 = Monday * @uses Date::getLastWeek() */ function getPrevWeek( $date = NULL, $start_of_week = 1 ) { return Date::getLastWeek( $date, $start_of_week ); } /** * returns date for last day of week * * @access public * @param mixed $date * @param integer $start_of_week 0 = Sunday, 1 = Monday * @since 2004-06-28 * @version 2004-06-28 * * @static if called with first arguments not NULL * * @uses date() * @uses Date::getAsTs() * @uses Date::addDay() */ function getEndOfWeek( $date = NULL, $start_of_week = 1 ) { if ( NULL === $date ) { $weekday_number = date('w', $this->getAsTs()) - $start_of_week; if ( $weekday_number < 0 ) { // weekday-number is negative, ($start_of_week was 1 and day is Sunday!) $weekday_number += 7; } $weekday_number -= 6; return $this->AddDay( -1 * $weekday_number, $this ); } $date = new Date( $date ); return $date->getEndOfWeek( NULL, $start_of_week ); } /** * returns date for first day of next week * * @access public * @param mixed $date * @param integer $start_of_week 0 = Sunday, 1 = Monday * @since 2004-06-28 * @version 2005-01-25 * * @static if called with first argument not NULL * * @uses Date::addDay() * @uses Date::getStartOfWeek() */ function getNextWeek( $date = NULL, $start_of_week = 1 ) { if ( NULL === $date ) { $date = $this; } return Date::getStartOfWeek( Date::addDay( 7, $date ), $start_of_week ); } /** * returns date for first day of last week * * @access public * @param mixed $date * @param integer $start_of_week 0 = Sunday, 1 = Monday * @since 2005-01-25 * @version 2005-01-25 * * @static if called with first argument not NULL * * @uses Date::addDay() * @uses Date::getStartOfWeek() */ function getLastWeek( $date = NULL, $start_of_week = 1 ) { if ( NULL === $date ) { $date = $this; } return Date::getStartOfWeek( Date::addDay( -7, $date ), $start_of_week ); } /** * adds given or 1 days to date * * @access public * @param integer $days * @param mixed $date * @return bool success * @since v1.3 * @version 2004-06-28 * * @static if called with two arguments * * @uses mktime() * @uses Date::setFromUnixTimestamp() * @uses Date::getYear() * @uses Date::getMonth() * @uses Date::getDay() * * @return string new date */ function addDay( $days = 1, $date = NULL ) { if ( NULL === $date ) { $ts = mktime(0, 0, 0, $this->getMonth(), $this->getDay() + $days, $this->getYear()); $this->setFromUnixTimestamp( $ts ); return $this->get(); } $date = new Date( $date ); return $date->addDay( $days, NULL ); } /** * returns date for next day * * @access public * @since 2004-06-28 * @version 2004-06-28 * * @static * @param mixed $date * * @uses Date::addDay() */ function getNextDay( $date = NULL ) { if ( NULL === $date ) { return $this->addDay( 1, $this ); } return Date::addDay( 1, $date ); } /** * returns date for prev day * * @access public * @since 2004-06-28 * @version 2004-06-28 * * @static * @param mixed $date * * @uses Date::addDay() */ function getPrevDay( $date = NULL ) { if ( NULL === $date ) { return $this->addDay( -1, $this ); } return Date::addDay( -1, $date ); } /** * checks if date is today * * @access public * @return bool true or false * @since v1.15 * * @uses date() * @uses Date::getAsIso() * @todo make static */ function isToday() { if ( $this->getAsIso() === date('Y-m-d') ) { return true; } return false; } /** * checks if date is yesterday * * @access public * @return bool true or false * @since v1.26 * * @uses date() * @uses time() * @uses Date::getAsIso() * @todo make static */ function isYesterday() { if ( $this->getAsIso() === date('Y-m-d', time() - 60 * 60 * 24) ) { return true; } return false; } /** * checks if date is tomorrow * * @access public * @return bool true or false * @since v1.26 * * @uses date() * @uses time() * @uses Date::getAsIso() * @todo make static */ function isTomorrow() { if ( $this->getAsIso() === date('Y-m-d', time() + 60 * 60 * 24) ) { return true; } return false; } /** * checks if date is in current month * * @access public * @return bool true or false * @since v1.23 * * @uses date() * @uses Date::getMonth() * @uses Date::getYear() * @todo make static */ function isCurrentMonth() { if ( $this->getMonth() == date('m') && $this->getYear() == date('Y') ) { return true; } return false; } /** * checks if date is in current month * * @access public * @return bool true or false * @since v1.23 * * @uses date() * @uses Date::getWeek() * @uses Date::getYear() * @todo make static */ function isCurrentWeek() { if ( $this->getWeek() == date('W') && $this->getYear() == date('Y') ) { return true; } return false; } /** * return true if date is Friday, otherwise false * * @access public * @return bool true or false * @since v1.8 * * @uses date() * @uses Date::getAsTs() * @todo make static */ function isFriday() { if ( date('w', $this->getAsTs()) === '5' ) { return true; } return false; } /** * return true if date is Sunday, otherwise false * * @access public * @return bool true or false * @since v1.9 * * @uses date() * @uses Date::getAsTs() * @todo make static */ function isSunday() { if ( date('w', $this->getAsTs()) === '0' ) { return true; } return false; } /** * return true if date is Sunday, otherwise false * * @access public * @return bool true or false * @since v1.9 * * @uses date() * @uses Date::getAsTs() * @todo make static */ function isSaturday() { if ( date('w', $this->getAsTs()) === '6' ) { return true; } return false; } /** * return true if date is first day in year, otherwise false * * @access public * @return bool true or false * @since v1.10 * * @uses Date::getDay() * @uses Date::getMonth() * @todo make static */ function isNewYear() { if ( $this->getDay() === 1 && $this->getMonth() === 1 ) { return true; } return false; } /** * checks if date is less then given date * if no date is given current date is used * * @access public * @param mixed $date * @return bool true or false * @since v1.17 * * @uses date() * @uses Date::get() * @uses Date * @todo make static */ function isLt( $date = NULL ) { if ( $date === NULL ) { $date = date( 'Y-m-d' ); } $date = new Date( $date ); if ( $this->get() < $date->get() ) { return true; } return false; } /** * checks if date is greater then or equal to given date * if no date is given current date is used * * @access public * @param mixed $date * @return bool true or false * @since v1.17 * * @uses Date::isGt() * @uses Date::isEq() * @todo make static */ function isGe( $date = NULL ) { if ( $this->isGt( $date ) || $this->isEq( $date ) ) { return true; } return false; } /** * checks if date is less then or equal to given date * if no date is given current date is used * * @access public * @param mixed $date * @return bool true or false * @since v1.17 * * @uses Date::isLt() * @uses Date::isEq() * @todo make static */ function isLe( $date = NULL ) { if ( $this->isLt( $date ) || $this->isEq( $date ) ) { return true; } return false; } /** * checks if date is equal to given date * if no date is given current date is used * * @access public * @param mixed $date * @return bool true or false * @since v1.17 * * @uses date() * @uses Date::get() * @uses Date * @todo make static */ function isEq( $date = NULL ) { if ( $date === NULL ) { $date = date( 'Y-m-d' ); } $date = new Date( $date ); if ( $this->get() === $date->get() ) { return true; } return false; } /** * checks if date is greater then given date * if no date is given current date is used * * @access public * @param mixed $date * @return boolean true or false * @since v1.17 * * @uses date() * @uses Date::get() * @uses Date * @todo make static */ function isGt( $date = NULL ) { if ( $date === NULL ) { $date = date( 'Y-m-d' ); } $date = new Date( $date ); if ( $this->get() > $date->get() ) { return true; } return false; } /** * checks if date is between date1 and date2 * * @since v1.18 * @access public * @uses Date::isGt() * @uses Date::isLt() * @param mixed $date1 * @param mixed $date2 * @return boolean true if date is between date1 and date2 or false if not * @todo make static with third argument */ function isBetween( $date1, $date2 ) { if ( $this->isGt( $date1 ) && $this->isLt( $date2 ) ) { return true; } elseif ( $this->isGt( $date2 ) && $this->isLt( $date1 ) ) { return true; } return falsE; } /** * Returns an array with all month names for current locale * <code> * array( 1 => 'Januar', 2 => 'Februar', 3 => ... ); * </code> * * @static * @access public * @uses strftime() * @uses mktime() * @return array month_names * @todo add optional paramter for locale, e.g. 'de-DE' */ function getLocalMonthNames() { $month_names = array(); for ( $month = 1; $month <= 12; $month++ ) { $month_names[$month] = strftime('%B', mktime(1, 1, 1, $month, 1, 1)); } return $month_names; } /** * returns next day Date object * * @access public * @uses Date as return value * @uses Date::addDay() * @return object Date nextday * @todo make static */ function nextDay() { $nextday = $this; $nextday->addDay(1); return $nextday; } /** * returns next day Date object * * @access public * @uses Date as return value * @uses Date::addDay() * @return object Date previousday * @todo make static */ function previousDay() { $previousday = $this; $previousday->addDay(-1); return $previousday; } } /** * returns true if given string is a valid date * otherwise false * * @param string $date * @return bool true if given string evaluates to a valid date or false if not * * @uses preg_match() * **/ function _is_date( $date ) { if ( preg_match('/[0-9]{4}\-[0-9]{2}\-[0-9]{2}/', $date) ) { return true; } return false; } ?>