date.php

См. документацию.

<?php
 
namespace Bitrix\Bizproc\BaseType\Value;
 
use Bitrix\Main;
 
class Date implements \JsonSerializable
{
    protected $timestamp;
    protected $offset;
 
    const SERIALIZED_PATTERN = '#(.+)\s\[([0-9\-]+)\]#i';
 
    public function __construct($dateFormatted = null, $offset = 0)
    {
        $offset = (int) $offset;
 
        if ($dateFormatted === null)
        {
            $this->timestamp = (new Main\Type\Date())->getTimestamp();
        }
        elseif (is_numeric($dateFormatted))
        {
            $this->timestamp = (int) $dateFormatted;
        }
        else
        {
            if (preg_match(static::SERIALIZED_PATTERN, $dateFormatted, $matches))
            {
                $dateFormatted = $matches[1];
                $offset = (int) $matches[2];
            }
 
            try
            {
                $date = new Main\Type\Date($dateFormatted);
                $this->checkYear($date);
 
                $this->timestamp = $date->getTimestamp() - $offset;
            }
            catch (Main\ObjectException $exception)
            {
                try
                {
                    $this->timestamp = (new Main\Type\Date($dateFormatted, DATE_ISO8601))->getTimestamp() - $offset;
                }
                catch (Main\ObjectException $exception)
                {
                    $this->timestamp = null;
                }
            }
        }
 
        $this->offset = $offset;
    }
 
    public function getTimestamp()
    {
        return $this->timestamp;
    }
 
    public function getOffset()
    {
        return $this->offset;
    }
 
    public function __toString()
    {
        return date($this->getFormat(), $this->getTimestamp() + $this->offset);
    }
 
    public static function fromSystemObject(Main\Type\Date $date)
    {
        return new static($date->getTimestamp());
    }
 
    public function toSystemObject()
    {
        return Main\Type\Date::createFromTimestamp($this->getTimestamp() + $this->offset);
    }
 
    public function serialize()
    {
        return sprintf('%s [%d]', $this->__toString(), $this->offset);
    }
 
    public static function isSerialized($dateString)
    {
        if (is_string($dateString) && preg_match(static::SERIALIZED_PATTERN, $dateString))
        {
            return true;
        }
        return false;
    }
 
    public function getFormat()
    {
        return Main\Type\Date::getFormat();
    }
 
    protected function checkYear(Main\Type\Date $date)
    {
        if ($date->getTimestamp() < 0)
        {
            $y = (int) $date->format('Y');
            $m = (int) $date->format('m');
            $d = (int) $date->format('d');
            if (0 <= $y && $y <= 69)
            {
                $y += 2000;
                $date->setDate($y, $m, $d);
            }
            elseif (70 <= $y && $y <= 100)
            {
                $y += 1900;
                $date->setDate($y, $m, $d);
            }
        }
    }
 
    public function jsonSerialize()
    {
        return $this->serialize();
    }
}