<?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;
}
?>
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