Auto correcting datetimes with timezones which do not match the server or database

DateTimeCorrectTimeZone.md

<?php

/**
 * This is an example of datetime handling where dates with different timezones are
 * handled in the same application. But of course the server and database are fixed
 * to a single matching timezone.
 */

function date_default_timezone_get__example($timezone = null)
{
    return $timezone ?: 'UTC';
}

final class DateTimeCorrectTimeZone extends \DateTime {
    public static function createFromFormat($format, $time, ?DateTimeZone $object = NULL)
    {
        $result = parent::createFromFormat($format, $time, $object);
        $serverTimeZone = new \DateTimeZone(date_default_timezone_get__example('America/New_York'));

        if ($result->getTimeZone() !== $serverTimeZone) {
            $result->setTimeZone($serverTimeZone);
        }

        return $result;
    }
}

// UTC Test
$x = DateTimeCorrectTimeZone::createFromFormat('Y-m-d H:i:s', '2001-01-01 12:00:00', new DateTimeZone('UTC'));
print_r($x);

if ($x->format('Y-m-d H:i:s') === '2001-01-01 07:00:00') {
    echo "UTC Test Passed\n";
} else {
    echo "UTC Test Failed\n";
}

// Same TimeZone Test
$x2 = DateTimeCorrectTimeZone::createFromFormat('Y-m-d H:i:s', '2001-01-01 12:00:00', new DateTimeZone('America/New_York'));
print_r($x2);

if ($x2->format('Y-m-d H:i:s') === '2001-01-01 12:00:00') {
    echo "Same Timezone Test Passed\n";
} else {
    echo "Same Timezone Test Failed\n";
}