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<?php
/**
* @version $Id: gantrydate.class.php 2389 2012-08-15 05:46:13Z btowles $
* @author RocketTheme http://www.rockettheme.com
* @copyright Copyright (C) 2007 - 2016 RocketTheme, LLC
* @license http://www.gnu.org/licenses/gpl-2.0.html GNU/GPLv2 only
*
* derived from Joomla with original copyright and license
* @copyright Copyright (C) 2005 - 2010 Open Source Matters, Inc. All rights reserved.
* @license GNU General Public License version 2 or later; see LICENSE.txt
*/
// Check to ensure this file is within the rest of the framework
defined('GANTRY_VERSION') or die();
class GantryDate
{
/**
* Unix timestamp
*
* @var int|boolean
* @access protected
*/
protected $date = false;
/**
* Time offset (in seconds)
*
* @var string
* @access protected
*/
protected $offset = 0;
/**
* Creates a new instance of JDate representing a given date.
*
* Accepts RFC 822, ISO 8601 date formats as well as unix time stamps.
* If not specified, the current date and time is used.
*
* @param mixed $date optional the date this JDate will represent.
* @param int $tzOffset optional the timezone $date is from
*/
public function __construct($date = 'now', $tzOffset = 0)
{
if ($date == 'now' || empty($date)) {
$this->date = strtotime(gmdate("M d Y H:i:s", time()));
return;
}
$tzOffset *= 3600;
if (is_numeric($date)) {
$this->date = $date - $tzOffset;
return;
}
if (preg_match('~(?:(?:Mon|Tue|Wed|Thu|Fri|Sat|Sun),\\s+)?(\\d{1,2})\\s+([a-zA-Z]{3})\\s+(\\d{4})\\s+(\\d{2}):(\\d{2}):(\\d{2})\\s+(.*)~i', $date, $matches)) {
$months = 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
);
$matches[2] = strtolower($matches[2]);
if (!isset($months[$matches[2]])) {
return;
}
$this->date = mktime($matches[4], $matches[5], $matches[6], $months[$matches[2]], $matches[1], $matches[3]);
if ($this->date === false) {
return;
}
if ($matches[7][0] == '+') {
$tzOffset = 3600 * substr($matches[7], 1, 2) + 60 * substr($matches[7], -2);
} elseif ($matches[7][0] == '-') {
$tzOffset = -3600 * substr($matches[7], 1, 2) - 60 * substr($matches[7], -2);
} else {
if (strlen($matches[7]) == 1) {
$oneHour = 3600;
$ord = ord($matches[7]);
if ($ord < ord('M')) {
$tzOffset = (ord('A') - $ord - 1) * $oneHour;
} elseif ($ord >= ord('M') && $matches[7] != 'Z') {
$tzOffset = ($ord - ord('M')) * $oneHour;
} elseif ($matches[7] == 'Z') {
$tzOffset = 0;
}
}
switch ($matches[7]) {
case 'UT':
case 'GMT':
$tzOffset = 0;
}
}
$this->date -= $tzOffset;
return;
}
if (preg_match('~(\\d{4})-(\\d{2})-(\\d{2})[T\s](\\d{2}):(\\d{2}):(\\d{2})(.*)~', $date, $matches)) {
$this->date = mktime($matches[4], $matches[5], $matches[6], $matches[2], $matches[3], $matches[1]);
if ($this->date == false) {
return;
}
if (isset($matches[7][0])) {
if ($matches[7][0] == '+' || $matches[7][0] == '-') {
$tzOffset = 60 * (substr($matches[7], 0, 3) * 60 + substr($matches[7], -2));
} elseif ($matches[7] == 'Z') {
$tzOffset = 0;
}
}
$this->date -= $tzOffset;
return;
}
$this->date = (strtotime($date) == -1) ? false : strtotime($date);
if ($this->date) {
$this->date -= $tzOffset;
}
}
/**
* Set the date offset (in hours)
*
* @access public
*
* @param float $offset The offset in hours
*/
public function setOffset($offset)
{
$this->offset = 3600 * $offset;
}
/**
* Get the date offset (in hours)
*
* @access public
* @return integer
*/
public function getOffset()
{
return ((float)$this->offset) / 3600.0;
}
/**
* Gets the date as an RFC 822 date.
*
* @param bool $local
*
* @return string a date in RFC 822 format
* @link http://www.ietf.org/rfc/rfc2822.txt?number=2822 IETF RFC 2822
* (replaces RFC 822)
*/
public function toRFC822($local = false)
{
$date = ($local) ? $this->date + $this->offset : $this->date;
$date = ($this->date !== false) ? date('D, d M Y H:i:s', $date) . ' +0000' : null;
return $date;
}
/**
* Gets the date as an ISO 8601 date.
*
* @param bool $local
*
* @return string a date in ISO 8601 (RFC 3339) format
* @link http://www.ietf.org/rfc/rfc3339.txt?number=3339 IETF RFC 3339
*/
public function toISO8601($local = false)
{
$date = ($local) ? $this->date + $this->offset : $this->date;
$offset = $this->getOffset();
$offset = ($local && $this->offset) ? sprintf("%+03d:%02d", $offset, abs(($offset - intval($offset)) * 60)) : 'Z';
$date = ($this->date !== false) ? date('Y-m-d\TH:i:s', $date) . $offset : null;
return $date;
}
/**
* Gets the date as in MySQL datetime format
*
* @param bool $local
*
* @return string a date in MySQL datetime format
* @link http://dev.mysql.com/doc/refman/4.1/en/datetime.html MySQL DATETIME
* format
*/
public function toMySQL($local = false)
{
$date = ($local) ? $this->date + $this->offset : $this->date;
$date = ($this->date !== false) ? date('Y-m-d H:i:s', $date) : null;
return $date;
}
/**
* Gets the date as UNIX time stamp.
*
* @param bool $local
*
* @return string a date as a unix time stamp
*/
public function toUnix($local = false)
{
$date = null;
if ($this->date !== false) {
$date = ($local) ? $this->date + $this->offset : $this->date;
}
return $date;
}
/**
* Gets the date in a specific format
*
* Returns a string formatted according to the given format. Month and weekday names and
* other language dependent strings respect the current locale
*
* @param string $format The date format specification string (see {@link PHP_MANUAL#strftime})
*
* @return string a date in a specific format
*/
public function toFormat($format = '%Y-%m-%d %H:%M:%S')
{
$date = ($this->date !== false) ? $this->gstrftime($format, $this->date + $this->offset) : null;
return $date;
}
/**
* Translates needed strings in for JDate::toFormat (see {@link PHP_MANUAL#strftime})
*
* @access protected
*
* @param string $format The date format specification string (see {@link PHP_MANUAL#strftime})
* @param int $time Unix timestamp
*
* @return string a date in the specified format
*/
protected function gstrftime($format, $time)
{
if (strpos($format, '%a') !== false) $format = str_replace('%a', $this->dayToString(date('w', $time), true), $format);
if (strpos($format, '%A') !== false) $format = str_replace('%A', $this->dayToString(date('w', $time)), $format);
if (strpos($format, '%b') !== false) $format = str_replace('%b', $this->monthToString(date('n', $time), true), $format);
if (strpos($format, '%B') !== false) $format = str_replace('%B', $this->monthToString(date('n', $time)), $format);
if (PHP_OS == 'WINNT') {
$format = str_replace("%h", "%b", $format);
$format = str_replace("%e", "%#d", $format);
}
$date = strftime($format, $time);
return $date;
}
/**
* Translates month number to string
*
* @access protected
*
* @param int $month The numeric month of the year
* @param bool $abbr Return the abreviated month string?
*
* @return string month string
*/
protected function monthToString($month, $abbr = false)
{
switch ($month) {
case 1:
return $abbr ? JText::_('JANUARY_SHORT') : JText::_('JANUARY');
case 2:
return $abbr ? JText::_('FEBRUARY_SHORT') : JText::_('FEBRUARY');
case 3:
return $abbr ? JText::_('MARCH_SHORT') : JText::_('MARCH');
case 4:
return $abbr ? JText::_('APRIL_SHORT') : JText::_('APRIL');
case 5:
return $abbr ? JText::_('MAY_SHORT') : JText::_('MAY');
case 6:
return $abbr ? JText::_('JUNE_SHORT') : JText::_('JUNE');
case 7:
return $abbr ? JText::_('JULY_SHORT') : JText::_('JULY');
case 8:
return $abbr ? JText::_('AUGUST_SHORT') : JText::_('AUGUST');
case 9:
return $abbr ? JText::_('SEPTEMBER_SHORT') : JText::_('SEPTEMBER');
case 10:
return $abbr ? JText::_('OCTOBER_SHORT') : JText::_('OCTOBER');
case 11:
return $abbr ? JText::_('NOVEMBER_SHORT') : JText::_('NOVEMBER');
case 12:
return $abbr ? JText::_('DECEMBER_SHORT') : JText::_('DECEMBER');
}
return '';
}
/**
* Translates day of week number to string
*
* @access protected
*
* @param int $day The numeric day of the week
* @param bool $abbr Return the abreviated day string?
*
* @return string day string
*/
protected function dayToString($day, $abbr = false)
{
switch ($day) {
case 0:
return $abbr ? JText::_('SUN') : JText::_('SUNDAY');
case 1:
return $abbr ? JText::_('MON') : JText::_('MONDAY');
case 2:
return $abbr ? JText::_('TUE') : JText::_('TUESDAY');
case 3:
return $abbr ? JText::_('WED') : JText::_('WEDNESDAY');
case 4:
return $abbr ? JText::_('THU') : JText::_('THURSDAY');
case 5:
return $abbr ? JText::_('FRI') : JText::_('FRIDAY');
case 6:
return $abbr ? JText::_('SAT') : JText::_('SATURDAY');
}
return '';
}
}