466 lines
12 KiB
PHP
466 lines
12 KiB
PHP
<?php
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/**
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* @package Joomla.Platform
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* @subpackage Date
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*
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* @copyright Copyright (C) 2005 - 2013 Open Source Matters, Inc. All rights reserved.
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* @license GNU General Public License version 2 or later; see LICENSE
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*/
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defined('JPATH_PLATFORM') or die;
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/**
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* JDate is a class that stores a date and provides logic to manipulate
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* and render that date in a variety of formats.
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*
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* @property-read string $daysinmonth t - Number of days in the given month.
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* @property-read string $dayofweek N - ISO-8601 numeric representation of the day of the week.
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* @property-read string $dayofyear z - The day of the year (starting from 0).
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* @property-read boolean $isleapyear L - Whether it's a leap year.
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* @property-read string $day d - Day of the month, 2 digits with leading zeros.
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* @property-read string $hour H - 24-hour format of an hour with leading zeros.
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* @property-read string $minute i - Minutes with leading zeros.
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* @property-read string $second s - Seconds with leading zeros.
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* @property-read string $month m - Numeric representation of a month, with leading zeros.
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* @property-read string $ordinal S - English ordinal suffix for the day of the month, 2 characters.
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* @property-read string $week W - Numeric representation of the day of the week.
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* @property-read string $year Y - A full numeric representation of a year, 4 digits.
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*
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* @package Joomla.Platform
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* @subpackage Date
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* @since 11.1
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*/
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class JDate extends DateTime
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{
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const DAY_ABBR = "\x021\x03";
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const DAY_NAME = "\x022\x03";
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const MONTH_ABBR = "\x023\x03";
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const MONTH_NAME = "\x024\x03";
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/**
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* The format string to be applied when using the __toString() magic method.
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*
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* @var string
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* @since 11.1
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*/
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public static $format = 'Y-m-d H:i:s';
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/**
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* Placeholder for a DateTimeZone object with GMT as the time zone.
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*
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* @var object
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* @since 11.1
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*/
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protected static $gmt;
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/**
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* Placeholder for a DateTimeZone object with the default server
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* time zone as the time zone.
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*
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* @var object
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* @since 11.1
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*/
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protected static $stz;
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/**
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* The DateTimeZone object for usage in rending dates as strings.
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*
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* @var DateTimeZone
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* @since 12.1
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*/
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protected $tz;
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/**
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* Constructor.
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*
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* @param string $date String in a format accepted by strtotime(), defaults to "now".
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* @param mixed $tz Time zone to be used for the date. Might be a string or a DateTimeZone object.
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*
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* @since 11.1
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*/
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public function __construct($date = 'now', $tz = null)
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{
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// Create the base GMT and server time zone objects.
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if (empty(self::$gmt) || empty(self::$stz))
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{
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self::$gmt = new DateTimeZone('GMT');
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self::$stz = new DateTimeZone(@date_default_timezone_get());
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}
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// If the time zone object is not set, attempt to build it.
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if (!($tz instanceof DateTimeZone))
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{
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if ($tz === null)
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{
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$tz = self::$gmt;
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}
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elseif (is_string($tz))
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{
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$tz = new DateTimeZone($tz);
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}
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}
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// If the date is numeric assume a unix timestamp and convert it.
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date_default_timezone_set('UTC');
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$date = is_numeric($date) ? date('c', $date) : $date;
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// Call the DateTime constructor.
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parent::__construct($date, $tz);
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// Reset the timezone for 3rd party libraries/extension that does not use JDate
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date_default_timezone_set(self::$stz->getName());
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// Set the timezone object for access later.
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$this->tz = $tz;
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}
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/**
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* Magic method to access properties of the date given by class to the format method.
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*
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* @param string $name The name of the property.
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*
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* @return mixed A value if the property name is valid, null otherwise.
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*
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* @since 11.1
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*/
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public function __get($name)
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{
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$value = null;
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switch ($name)
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{
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case 'daysinmonth':
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$value = $this->format('t', true);
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break;
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case 'dayofweek':
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$value = $this->format('N', true);
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break;
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case 'dayofyear':
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$value = $this->format('z', true);
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break;
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case 'isleapyear':
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$value = (boolean) $this->format('L', true);
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break;
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case 'day':
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$value = $this->format('d', true);
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break;
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case 'hour':
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$value = $this->format('H', true);
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break;
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case 'minute':
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$value = $this->format('i', true);
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break;
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case 'second':
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$value = $this->format('s', true);
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break;
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case 'month':
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$value = $this->format('m', true);
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break;
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case 'ordinal':
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$value = $this->format('S', true);
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break;
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case 'week':
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$value = $this->format('W', true);
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break;
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case 'year':
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$value = $this->format('Y', true);
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break;
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default:
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$trace = debug_backtrace();
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trigger_error(
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'Undefined property via __get(): ' . $name . ' in ' . $trace[0]['file'] . ' on line ' . $trace[0]['line'],
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E_USER_NOTICE
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);
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}
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return $value;
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}
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/**
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* Magic method to render the date object in the format specified in the public
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* static member JDate::$format.
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*
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* @return string The date as a formatted string.
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*
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* @since 11.1
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*/
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public function __toString()
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{
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return (string) parent::format(self::$format);
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}
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/**
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* Proxy for new JDate().
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*
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* @param string $date String in a format accepted by strtotime(), defaults to "now".
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* @param mixed $tz Time zone to be used for the date.
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*
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* @return JDate
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*
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* @since 11.3
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*/
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public static function getInstance($date = 'now', $tz = null)
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{
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return new JDate($date, $tz);
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}
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/**
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* Translates day of week number to a string.
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*
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* @param integer $day The numeric day of the week.
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* @param boolean $abbr Return the abbreviated day string?
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*
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* @return string The day of the week.
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*
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* @since 11.1
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*/
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public function dayToString($day, $abbr = false)
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{
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switch ($day)
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{
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case 0:
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return $abbr ? JText::_('SUN') : JText::_('SUNDAY');
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case 1:
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return $abbr ? JText::_('MON') : JText::_('MONDAY');
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case 2:
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return $abbr ? JText::_('TUE') : JText::_('TUESDAY');
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case 3:
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return $abbr ? JText::_('WED') : JText::_('WEDNESDAY');
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case 4:
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return $abbr ? JText::_('THU') : JText::_('THURSDAY');
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case 5:
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return $abbr ? JText::_('FRI') : JText::_('FRIDAY');
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case 6:
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return $abbr ? JText::_('SAT') : JText::_('SATURDAY');
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}
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}
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/**
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* Gets the date as a formatted string in a local calendar.
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*
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* @param string $format The date format specification string (see {@link PHP_MANUAL#date})
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* @param boolean $local True to return the date string in the local time zone, false to return it in GMT.
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* @param boolean $translate True to translate localised strings
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*
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* @return string The date string in the specified format format.
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*
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* @since 11.1
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*/
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public function calendar($format, $local = false, $translate = true)
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{
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return $this->format($format, $local, $translate);
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}
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/**
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* Gets the date as a formatted string.
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*
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* @param string $format The date format specification string (see {@link PHP_MANUAL#date})
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* @param boolean $local True to return the date string in the local time zone, false to return it in GMT.
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* @param boolean $translate True to translate localised strings
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*
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* @return string The date string in the specified format format.
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*
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* @since 11.1
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*/
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public function format($format, $local = false, $translate = true)
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{
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if ($translate)
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{
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// Do string replacements for date format options that can be translated.
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$format = preg_replace('/(^|[^\\\])D/', "\\1" . self::DAY_ABBR, $format);
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$format = preg_replace('/(^|[^\\\])l/', "\\1" . self::DAY_NAME, $format);
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$format = preg_replace('/(^|[^\\\])M/', "\\1" . self::MONTH_ABBR, $format);
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$format = preg_replace('/(^|[^\\\])F/', "\\1" . self::MONTH_NAME, $format);
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}
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// If the returned time should not be local use GMT.
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if ($local == false)
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{
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parent::setTimezone(self::$gmt);
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}
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// Format the date.
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$return = parent::format($format);
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if ($translate)
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{
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// Manually modify the month and day strings in the formatted time.
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if (strpos($return, self::DAY_ABBR) !== false)
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{
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$return = str_replace(self::DAY_ABBR, $this->dayToString(parent::format('w'), true), $return);
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}
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if (strpos($return, self::DAY_NAME) !== false)
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{
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$return = str_replace(self::DAY_NAME, $this->dayToString(parent::format('w')), $return);
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}
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if (strpos($return, self::MONTH_ABBR) !== false)
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{
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$return = str_replace(self::MONTH_ABBR, $this->monthToString(parent::format('n'), true), $return);
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}
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if (strpos($return, self::MONTH_NAME) !== false)
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{
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$return = str_replace(self::MONTH_NAME, $this->monthToString(parent::format('n')), $return);
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}
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}
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if ($local == false)
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{
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parent::setTimezone($this->tz);
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}
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return $return;
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}
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/**
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* Get the time offset from GMT in hours or seconds.
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*
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* @param boolean $hours True to return the value in hours.
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*
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* @return float The time offset from GMT either in hours or in seconds.
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*
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* @since 11.1
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*/
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public function getOffsetFromGMT($hours = false)
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{
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return (float) $hours ? ($this->tz->getOffset($this) / 3600) : $this->tz->getOffset($this);
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}
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/**
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* Translates month number to a string.
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*
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* @param integer $month The numeric month of the year.
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* @param boolean $abbr If true, return the abbreviated month string
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*
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* @return string The month of the year.
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*
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* @since 11.1
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*/
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public function monthToString($month, $abbr = false)
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{
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switch ($month)
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{
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case 1:
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return $abbr ? JText::_('JANUARY_SHORT') : JText::_('JANUARY');
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case 2:
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return $abbr ? JText::_('FEBRUARY_SHORT') : JText::_('FEBRUARY');
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case 3:
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return $abbr ? JText::_('MARCH_SHORT') : JText::_('MARCH');
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case 4:
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return $abbr ? JText::_('APRIL_SHORT') : JText::_('APRIL');
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case 5:
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return $abbr ? JText::_('MAY_SHORT') : JText::_('MAY');
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case 6:
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return $abbr ? JText::_('JUNE_SHORT') : JText::_('JUNE');
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case 7:
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return $abbr ? JText::_('JULY_SHORT') : JText::_('JULY');
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case 8:
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return $abbr ? JText::_('AUGUST_SHORT') : JText::_('AUGUST');
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case 9:
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return $abbr ? JText::_('SEPTEMBER_SHORT') : JText::_('SEPTEMBER');
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case 10:
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return $abbr ? JText::_('OCTOBER_SHORT') : JText::_('OCTOBER');
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case 11:
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return $abbr ? JText::_('NOVEMBER_SHORT') : JText::_('NOVEMBER');
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case 12:
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return $abbr ? JText::_('DECEMBER_SHORT') : JText::_('DECEMBER');
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}
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}
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/**
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* Method to wrap the setTimezone() function and set the internal time zone object.
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*
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* @param DateTimeZone $tz The new DateTimeZone object.
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*
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* @return JDate
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*
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* @since 11.1
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* @note This method can't be type hinted due to a PHP bug: https://bugs.php.net/bug.php?id=61483
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*/
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public function setTimezone($tz)
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{
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$this->tz = $tz;
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return parent::setTimezone($tz);
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}
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/**
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* Gets the date as an ISO 8601 string. IETF RFC 3339 defines the ISO 8601 format
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* and it can be found at the IETF Web site.
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*
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* @param boolean $local True to return the date string in the local time zone, false to return it in GMT.
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*
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* @return string The date string in ISO 8601 format.
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*
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* @link http://www.ietf.org/rfc/rfc3339.txt
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* @since 11.1
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*/
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public function toISO8601($local = false)
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{
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return $this->format(DateTime::RFC3339, $local, false);
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}
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/**
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* Gets the date as an SQL datetime string.
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*
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* @param boolean $local True to return the date string in the local time zone, false to return it in GMT.
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* @param JDatabaseDriver $db The database driver or null to use JFactory::getDbo()
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*
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* @return string The date string in SQL datetime format.
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*
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* @link http://dev.mysql.com/doc/refman/5.0/en/datetime.html
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* @since 11.4
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*/
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public function toSql($local = false, JDatabaseDriver $db = null)
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{
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if ($db === null)
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{
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$db = JFactory::getDbo();
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}
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return $this->format($db->getDateFormat(), $local, false);
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}
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/**
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* Gets the date as an RFC 822 string. IETF RFC 2822 supercedes RFC 822 and its definition
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* can be found at the IETF Web site.
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*
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* @param boolean $local True to return the date string in the local time zone, false to return it in GMT.
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*
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* @return string The date string in RFC 822 format.
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*
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* @link http://www.ietf.org/rfc/rfc2822.txt
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* @since 11.1
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*/
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public function toRFC822($local = false)
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{
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return $this->format(DateTime::RFC2822, $local, false);
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}
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/**
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* Gets the date as UNIX time stamp.
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*
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* @return integer The date as a UNIX timestamp.
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*
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* @since 11.1
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*/
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public function toUnix()
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{
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return (int) parent::format('U');
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}
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}
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