note 98005 added to class.datetime

Completed tom's DateTime for PHP 5.1 (and possibly earlier)
Still not perfect, still no timezone handling, but added minimal support for DateTime::setTime(), DateTime::setDate(), DateTime::add(), Datetime::sub(), and DateInterval::__construct().

<?php

if (!class_exists('DateTime'))
{
  class DateTime
  {
    var $date;
   
    function __construct($date = "now", $tz = null) {
      $this->date = strtotime($date);
    }
    
    function setTime($hour, $minute, $second = 0) {
      $this->date = strtotime(date("Y-m-d", $this->date)." ".$hour.":".$minute.":".$second);
    }
    
    function setDate($year, $month, $day) {
      $this->date = strtotime($year."-".$month."-".$day." ".date("H:i:s", $this->date));
    }
    
    function add(DateInterval $interval) {
      self::modify('+'.$interval->sec.' sec');
    }
    
    function sub(DateInterval $interval) {
      self::modify('-'.$interval->sec.' sec');
    }
    
    function setTimeZone($timezone) {
      return;
    }
    
    function modify($multiplier) {
      $this->date = strtotime($this->__getDate() . ' ' . $multiplier);
    }
   
    function format($format) {
      return date($format, $this->date);
    }
    
    private function __getDate() {
      return date(DATE_ATOM, $this->date);   
    }
  }
  
  class DateInterval
  {
    var $sec;
    
    function __construct($string)
    {
      $string = strtoupper($string);
      
      if ($string{0} != 'P')
        throw new Exception("'P' expected as first character in '".$string."'");
      
      $tmp = explode("T", $string, 2);
      if (count($tmp) == 1)
        $tmp[] = '';
      list($str_date, $str_time) = $tmp;
      
      $this->sec = 0;
      
      if (preg_match('/([0-9]+)Y/', $str_date, $matches))
        $this->sec += $matches[1];
      
      $this->sec *= 12;
      
      if (preg_match('/([0-9]+)M/', $str_date, $matches))
        $this->sec += $matches[1];
      
      $this->sec *= 365.25;
      
      if (preg_match('/([0-9]+)W/', $str_date, $matches))
        $this->sec += $matches[1] * 7;
      
      if (preg_match('/([0-9]+)D/', $str_date, $matches))
        $this->sec += $matches[1];
      
      $this->sec *= 24;
      
      if (preg_match('/([0-9]+)H/', $str_time, $matches))
        $this->sec += $matches[1];
      
      $this->sec *= 60;
      
      if (preg_match('/([0-9]+)M/', $str_time, $matches))
        $this->sec += $matches[1];
      
      $this->sec *= 60;
      
      if (preg_match('/([0-9]+)S/', $str_time, $matches))
        $this->sec += $matches[1];
      
    }
  }
  
  class DateTimeZone
  {
    function __construct($string) { }
  }
}
----
Server IP: 195.221.21.36
Probable Submitter: 81.252.87.41
----
Manual Page -- http://www.php.net/manual/en/class.datetime.php
Edit        -- https://master.php.net/note/edit/98005
Del: integrated  -- https://master.php.net/note/delete/98005/integrated
Del: useless     -- https://master.php.net/note/delete/98005/useless
Del: bad code    -- https://master.php.net/note/delete/98005/bad+code
Del: spam        -- https://master.php.net/note/delete/98005/spam
Del: non-english -- https://master.php.net/note/delete/98005/non-english
Del: in docs     -- https://master.php.net/note/delete/98005/in+docs
Del: other reasons-- https://master.php.net/note/delete/98005
Reject      -- https://master.php.net/note/reject/98005
Search      -- https://master.php.net/manage/user-notes.php