<?php

namespace DynamicOOOS\Mpdf\Utils;

class PdfDate
{
    /**
     * PDF documents use the internal date format: (D:YYYYMMDDHHmmSSOHH'mm'). The date format has these parts:
     *
     *   YYYY The full four-digit year. (For example, 2004)
     *   MM   The month from 01 to 12.
     *   DD   The day from 01 to 31.
     *   HH   The hour from 00 to 23.
     *   mm   The minute from 00 to 59.
     *   SS   The seconds from 00 to 59.
     *   O    The relationship of local time to Universal Time (UT), as denoted by one of the characters +, -, or Z.
     *   HH   The absolute value of the offset from UT in hours specified as 00 to 23.
     *   mm   The absolute value of the offset from UT in minutes specified as 00 to 59.
     *
     * @return string
     */
    public static function format($date)
    {
        $z = \date('O');
        // +0200
        $offset = \substr($z, 0, 3) . "'" . \substr($z, 3, 2) . "'";
        // +02'00'
        return \date('YmdHis', $date) . $offset;
    }
}
