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<?php /** * @version $Id: date.php 14401 2010-01-26 14:10:00Z louis $ * @package Joomla.Framework * @subpackage Utilities * @copyright Copyright (C) 2005 - 2010 Open Source Matters. All rights reserved. * @license GNU/GPL, see LICENSE.php * Joomla! is free software. This version may have been modified pursuant * to the GNU General Public License, and as distributed it includes or * is derivative of works licensed under the GNU General Public License or * other free or open source software licenses. * See COPYRIGHT.php for copyright notices and details. */ // Check to ensure this file is within the rest of the framework defined('JPATH_BASE') or die(); /** * JDate is a class that stores a date * * @package Joomla.Framework * @subpackage Utilities * @since 1.5 */ class JDate extends JObject { /** * Unix timestamp * * @var int|boolean * @access protected */ var $_date = false; /** * Time offset (in seconds) * * @var string * @access protected */ var $_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 $date is from */ function __construct($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 -= $tzOffset; } } /** * Set the date offset (in hours) * * @access public * @param float The offset in hours */ function setOffset($offset) { $this->_offset = 3600 * $offset; } /** * Get the date offset (in hours) * * @access public * @return integer */ function getOffset() { return ((float) $this->_offset) / 3600.0; } /** * Gets the date as an RFC 822 date. * * @return a date in RFC 822 format * @link http://www.ietf.org/rfc/rfc2822.txt?number=2822 IETF RFC 2822 * (replaces RFC 822) */ function toRFC822($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 $date; } /** * Gets the date as an ISO 8601 date. * * @return a date in ISO 8601 (RFC 3339) format * @link http://www.ietf.org/rfc/rfc3339.txt?number=3339 IETF RFC 3339 */ function toISO8601($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 $date; } /** * Gets the date as in MySQL datetime format * * @return a date in MySQL datetime format * @link http://dev.mysql.com/doc/refman/4.1/en/datetime.html MySQL DATETIME * format */ function toMySQL($local = false) { $date = ($local) ? $this->_date + $this->_offset : $this->_date; $date = ($this->_date !== false) ? date('Y-m-d H:i:s', $date) : null; return $date; } /** * Gets the date as UNIX time stamp. * * @return a date as a unix time stamp */ function toUnix($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 $format The date format specification string (see {@link PHP_MANUAL#strftime}) * @return a date in a specific format */ function toFormat($format = '%Y-%m-%d %H:%M:%S') { $date = ($this->_date !== false) ? $this->_strftime($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 $time Unix timestamp * @return string a date in the specified format */ function _strftime($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); $date = strftime($format, $time); return $date; } /** * Translates month number to string * * @access protected * @param int $month The numeric month of the year * @param bool $abbr Return the abreviated month string? * @return string month string */ function _monthToString($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'); } } /** * Translates day of week number to string * * @access protected * @param int $day The numeric day of the week * @param bool $abbr Return the abreviated day string? * @return string day string */ function _dayToString($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'); } } }
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