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<?php
/**
* @package SPLIB
* @version $Id: DateMath.php,v 1.2 2005/09/05 05:47:01 kevin Exp $
*/
/**
* DateMath class for solving common date problems
* @package SPLIB
*/
class DateMath {
/**
* Unix timestamp
* @access private
* @var int
*/
var $timeStamp;
/**
* DateMath constructor
* If parameters not provided, DateMath uses current time
* <code>
* $dateMath = new DateMath(2003,8,22); // Uses 22nd August 2003
* $dateMath = new DateMath(); // Uses current date and time
* </code>
* @param int year ( e.g. 2003 )
* @param int month ( e.g. 8 for August )
* @param int day of month ( e.g. 22 )
* @param int hours ( e.g. 15 )
* @param int minutes ( e.g. 5 )
* @param int seconds ( e.g. 7 )
*/
function DateMath($y = null, $m = null, $d = null, $h = null, $i = null, $s = null){
$time = time();
$y = is_numeric($y) ? $y : date('Y', $time);
$m = is_numeric($m) ? $m : date('m', $time);
$d = is_numeric($d) ? $d : date('d', $time);
$h = is_numeric($h) ? $h : date('H', $time);
$i = is_numeric($i) ? $i : date('i', $time);
$s = is_numeric($s) ? $s : date('s', $time);
$this->timeStamp=mktime($h,$i,$s,$m,$d,$y);
}
/**
* For setting a Unix timestamp
* @param int a Unix timestamp
* @return void
* @access public
*/
function setTimeStamp ($timeStamp) {
$this->timeStamp = $timeStamp;
}
/**
* Returns the day of the week
* @param boolean if true returned value will be numeric day of week
* @return mixed e.g. Saturday or 6
* @access public
*/
function dayOfWeek ($numeric=false) {
if ( $numeric ) {
return date('w', $this->timeStamp);
} else {
return date('l', $this->timeStamp);
}
}
/**
* Returns the ISO 8601 week of the year
* @return int numeric week of year e.g. 12
* @access public
*/
function weekOfYear () {
return date ('W',$this->timeStamp);
}
/**
* Provides the number of days in the month
* @return int number of days in the month
* @access public
*/
function daysInMonth () {
return date('t',$this->timeStamp);
}
/**
* Determines whether current year is a leap year
* @return boolean true if a leap year
* @access public
*/
function isLeapYear () {
return date('L', $this->timeStamp);
}
/**
* Returns the day of the year
* @return int numeric day of year e.g. 81
* @access public
*/
function dayOfYear () {
return date('z', $this->timeStamp) + 1;
}
/**
* Returns the day of the week for the first of the month
* @param boolean if true returned value will be numeric day of week
* @return string e.g. Monday
* @access public
*/
function firstDayInMonth ($numeric = false) {
$firstDay = mktime(0,0,0,date('m',$this->timeStamp),1,
date('Y',$this->timeStamp));
if ($numeric) {
return date('w', $firstDay);
} else {
return date('l', $firstDay);
}
}
/**
* Provide the suffix for a number e.g. 22 is the 22nd
* @static
* @param int some number
* @return string e.g. 'nd' for 22nd
* @static
* @access public
*/
function suffix ($num) {
if ( $num < 11 || $num > 13 ) {
$desc=array(0=>'th',1=>'st',2=>'nd',3=>'rd',4=>'th',
5=>'th',6=>'th',7=>'th',8=>'th',9=>'th');
return $desc[$num % 10];
} else {
return 'th';
}
}
}
?>
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