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@ 2014-01-12T12:02:30Z

<?php

class DateTimeFactory
{
	const DATE_INTERVAL = 'PT20M';

	// I personally prefer adding DateInterval
    public static function createDateTimeByInterval1(DateInterval $dateInterval)
    {
		// create DateTime, add Date and/or TimeZone in constructor if needed.
        $dateTime = new DateTime();
		return $dateTime->add($dateInterval);
    }

    // Using a ISO 8601 String
    public static function createDateTimeByInterval2($intervalStr)
    {
		// create DateTime, add Date and/or TimeZone in constructor if needed.
        $dateTime = new DateTime();
		return $dateTime->add(new DateInterval($intervalStr));
    }
}

var_dump(
    DateTimeFactory::createDateTimeByInterval1(new DateInterval(DateTimeFactory::DATE_INTERVAL)),
    DateTimeFactory::createDateTimeByInterval2(DateTimeFactory::DATE_INTERVAL)
);

Output for git.master: object(DateTime)#2 (3) { ["date"]=> string(26) "2014-01-12 13:22:30.003731" ["timezone_type"]=> int(3) ["timezone"]=> string(16) "Europe/Amsterdam" } object(DateTime)#1 (3) { ["date"]=> string(26) "2014-01-12 13:22:30.003742" ["timezone_type"]=> int(3) ["timezone"]=> string(16) "Europe/Amsterdam" }
Output for git.master_jit: object(DateTime)#2 (3) { ["date"]=> string(26) "2014-01-12 13:22:30.004010" ["timezone_type"]=> int(3) ["timezone"]=> string(16) "Europe/Amsterdam" } object(DateTime)#1 (3) { ["date"]=> string(26) "2014-01-12 13:22:30.004020" ["timezone_type"]=> int(3) ["timezone"]=> string(16) "Europe/Amsterdam" }
Output for rfc.property-hooks: object(DateTime)#2 (3) { ["date"]=> string(26) "2014-01-12 13:22:30.005545" ["timezone_type"]=> int(3) ["timezone"]=> string(16) "Europe/Amsterdam" } object(DateTime)#1 (3) { ["date"]=> string(26) "2014-01-12 13:22:30.005552" ["timezone_type"]=> int(3) ["timezone"]=> string(16) "Europe/Amsterdam" }

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2020-03-21 RFC: Is_Literal - declined
2020-12-04 Enumerations - included in PHP 8.1
2018-06-15 Typed Properties v2 - implemented in PHP 7.4
2016-08-12 Object typehint - included in PHP 7.2
2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn
2016-04-19 Lexical scope support for anonymous classes - suspended
2016-04-17 Functional Interfaces - declined
2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0
2015-08-27 Callable Prototypes - declined
2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions
2015-02-18 Scalar type hints v5 - included in PHP 7
2015-02-14 Union Types - declined
2013-09-22 Anonymous classes - included in PHP 7

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