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d3887570b2
egroupware/phpgwapi/inc/class.datetime.inc.php
skeeter d3887570b2 This part of a major fix for the calendar.
2002-04-16 15:45:50 +00:00

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<?php
/**************************************************************************\
* phpGroupWare API - Commononly used functions *
* This file written by Dan Kuykendall <seek3r@phpgroupware.org> *
* and Joseph Engo <jengo@phpgroupware.org> *
* and Mark Peters <skeeter@phpgroupware.org> *
* Commononly used functions by phpGroupWare developers *
* Copyright (C) 2000, 2001 Dan Kuykendall *
* -------------------------------------------------------------------------*
* This library is part of the phpGroupWare API *
* http://www.phpgroupware.org/api *
* ------------------------------------------------------------------------ *
* This library is free software; you can redistribute it and/or modify it *
* under the terms of the GNU Lesser General Public License as published by *
* the Free Software Foundation; either version 2.1 of the License, *
* or any later version. *
* This library is distributed in the hope that it will be useful, but *
* WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. *
* See the GNU Lesser General Public License for more details. *
* You should have received a copy of the GNU Lesser General Public License *
* along with this library; if not, write to the Free Software Foundation, *
* Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA *
\**************************************************************************/
/* $Id$ */
$d1 = strtolower(@substr(PHPGW_API_INC,0,3));
$d2 = strtolower(@substr(PHPGW_SERVER_ROOT,0,3));
$d3 = strtolower(@substr(PHPGW_APP_INC,0,3));
if($d1 == 'htt' || $d1 == 'ftp' || $d2 == 'htt' || $d2 == 'ftp' || $d3 == 'htt' || $d3 == 'ftp')
{
echo 'Failed attempt to break in via an old Security Hole!<br>'."\n";
exit;
}
unset($d1);
unset($d2);
unset($d3);
/*!
@class datetime
@abstract datetime class that contains common date/time functions
*/
class datetime
{
var $tz_offset;
var $days = Array();
var $gmtnow;
var $gmtdate;
function datetime()
{
$this->tz_offset = ((60 * 60) * intval($GLOBALS['phpgw_info']['user']['preferences']['common']['tz_offset']));
/*
* This is not advanced enough to automatically recalc Daylight Savings time
if(date('I') == 1)
{
$this->tz_offset += 3600;
}
*/
$this->gmtdate = gmdate('D, d M Y H:i:s',time()).' GMT';
$this->gmtnow = $this->convert_rfc_to_epoch($this->gmtdate);
}
function convert_rfc_to_epoch($date_str)
{
$comma_pos = strpos($date_str,',');
if($comma_pos)
{
$date_str = substr($date_str,$comma_pos+1);
}
// This may need to be a reference to the different months in native tongue....
$month= array(
'Jan' => 1,
'Feb' => 2,
'Mar' => 3,
'Apr' => 4,
'May' => 5,
'Jun' => 6,
'Jul' => 7,
'Aug' => 8,
'Sep' => 9,
'Oct' => 10,
'Nov' => 11,
'Dec' => 12
);
$dta = array();
$ta = array();
// Convert "15 Jul 2000 20:50:22 +0200" to unixtime
$dta = explode(' ',$date_str);
$ta = explode(':',$dta[4]);
if(substr($dta[5],0,3) <> 'GMT')
{
$tzoffset = substr($dta[5],0,1);
$tzhours = intval(substr($dta[5],1,2));
$tzmins = intval(substr($dta[5],3,2));
switch ($tzoffset)
{
case '-':
(int)$ta[0] += $tzhours;
(int)$ta[1] += $tzmins;
break;
case '+':
(int)$ta[0] -= $tzhours;
(int)$ta[1] -= $tzmins;
break;
}
}
return mktime($ta[0],$ta[1],$ta[2],$month[$dta[2]],$dta[1],$dta[3]);
}
function get_weekday_start($year,$month,$day)
{
$weekday = $this->day_of_week($year,$month,$day);
switch($GLOBALS['phpgw_info']['user']['preferences']['calendar']['weekdaystarts'])
{
// Saturday is for arabic support
case 'Saturday':
$this->days = Array(
0 => 'Sat',
1 => 'Sun',
2 => 'Mon',
3 => 'Tue',
4 => 'Wed',
5 => 'Thu',
6 => 'Fri'
);
switch($weekday)
{
case 0:
$sday = mktime(2,0,0,$month,$day - 1,$year);
break;
case 6:
$sday = mktime(2,0,0,$month,$day,$year);
break;
default:
$sday = mktime(2,0,0,$month,$day - ($weekday + 1),$year);
break;
}
break;
case 'Monday':
$this->days = Array(
0 => 'Mon',
1 => 'Tue',
2 => 'Wed',
3 => 'Thu',
4 => 'Fri',
5 => 'Sat',
6 => 'Sun'
);
switch($weekday)
{
case 0:
$sday = mktime(2,0,0,$month,$day - 6,$year);
break;
case 1:
$sday = mktime(2,0,0,$month,$day,$year);
break;
default:
$sday = mktime(2,0,0,$month,$day - ($weekday - 1),$year);
break;
}
break;
case 'Sunday':
default:
$this->days = Array(
0 => 'Sun',
1 => 'Mon',
2 => 'Tue',
3 => 'Wed',
4 => 'Thu',
5 => 'Fri',
6 => 'Sat'
);
$sday = mktime(2,0,0,$month,$day - $weekday,$year);
break;
}
return $sday - 7200;
}
function is_leap_year($year)
{
if ((intval($year) % 4 == 0) && (intval($year) % 100 != 0) || (intval($year) % 400 == 0))
{
return 1;
}
else
{
return 0;
}
}
function days_in_month($month,$year)
{
$days = Array(
1 => 31,
2 => 28 + $this->is_leap_year(intval($year)),
3 => 31,
4 => 30,
5 => 31,
6 => 30,
7 => 31,
8 => 31,
9 => 30,
10 => 31,
11 => 30,
12 => 31
);
return $days[intval($month)];
}
function date_valid($year,$month,$day)
{
return checkdate(intval($month),intval($day),intval($year));
}
function time_valid($hour,$minutes,$seconds)
{
if(intval($hour) < 0 || intval($hour) > 24)
{
return False;
}
if(intval($minutes) < 0 || intval($minutes) > 59)
{
return False;
}
if(intval($seconds) < 0 || intval($seconds) > 59)
{
return False;
}
return True;
}
function day_of_week($year,$month,$day)
{
if($month > 2)
{
$month -= 2;
}
else
{
$month += 10;
$year--;
}
$day = (floor((13 * $month - 1) / 5) + $day + ($year % 100) + floor(($year % 100) / 4) + floor(($year / 100) / 4) - 2 * floor($year / 100) + 77);
return (($day - 7 * floor($day / 7)));
}
function day_of_year($year,$month,$day)
{
$days = array(0,31,59,90,120,151,181,212,243,273,304,334);
$julian = ($days[$month - 1] + $day);
if($month > 2 && $this->is_leap_year($year))
{
$julian++;
}
return($julian);
}
function date_compare($a_year,$a_month,$a_day,$b_year,$b_month,$b_day)
{
$a_date = mktime(0,0,0,intval($a_month),intval($a_day),intval($a_year));
$b_date = mktime(0,0,0,intval($b_month),intval($b_day),intval($b_year));
if($a_date == $b_date)
{
return 0;
}
elseif($a_date > $b_date)
{
return 1;
}
elseif($a_date < $b_date)
{
return -1;
}
}
function time_compare($a_hour,$a_minute,$a_second,$b_hour,$b_minute,$b_second)
{
$a_time = mktime(intval($a_hour),intval($a_minute),intval($a_second),0,0,70);
$b_time = mktime(intval($b_hour),intval($b_minute),intval($b_second),0,0,70);
if($a_time == $b_time)
{
return 0;
}
elseif($a_time > $b_time)
{
return 1;
}
elseif($a_time < $b_time)
{
return -1;
}
}
function makegmttime($hour,$minute,$second,$month,$day,$year)
{
return $this->gmtdate(mktime($hour, $minute, $second, $month, $day, $year));
}
function localdates($localtime)
{
$date = Array('raw','day','month','year','full','dow','dm','bd');
$date['raw'] = $localtime;
$date['year'] = intval($GLOBALS['phpgw']->common->show_date($date['raw'],'Y'));
$date['month'] = intval($GLOBALS['phpgw']->common->show_date($date['raw'],'m'));
$date['day'] = intval($GLOBALS['phpgw']->common->show_date($date['raw'],'d'));
$date['full'] = intval($GLOBALS['phpgw']->common->show_date($date['raw'],'Ymd'));
$date['bd'] = mktime(0,0,0,$date['month'],$date['day'],$date['year']);
$date['dm'] = intval($GLOBALS['phpgw']->common->show_date($date['raw'],'dm'));
$date['dow'] = $this->day_of_week($date['year'],$date['month'],$date['day']);
$date['hour'] = intval($GLOBALS['phpgw']->common->show_date($date['raw'],'H'));
$date['minute'] = intval($GLOBALS['phpgw']->common->show_date($date['raw'],'i'));
$date['second'] = intval($GLOBALS['phpgw']->common->show_date($date['raw'],'s'));
return $date;
}
function gmtdate($localtime)
{
return $this->localdates($localtime - $this->tz_offset);
}
}
?>
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