getDateTimeFormatString example

public function convertToDatabaseValue($value, AbstractPlatform $platform)
    {
        if (!$value instanceof DateTimeInterface && !empty($value)) {
            trigger_error('Deprecated the implicit conversion of strings to DateTime objects in Doctrine entities, it will be removed in Shopware 5.7. Relying on this conversion will throw a deprecation warning till then, please only insert DateTime objects.', E_USER_DEPRECATED);
            $value = new DateTime($value);
        } elseif (empty($value)) {
            $value = null;
        }

        return ($value !== null)
                ? $value->format($platform->getDateTimeFormatString()) : null;
    }

    public function convertToPHPValue($value, AbstractPlatform $platform)
    {
        if ($value === null) {
            return null;
        }

        $val = DateTime::createFromFormat($platform->getDateTimeFormatString(), $value);
        if (!$val) {
            throw ConversionException::conversionFailedFormat($value, $this->getName(), $platform->getDateTimeFormatString());
        }

        $this->assertFalse($this->createSchemaManager()->tablesExist(['messenger_messages']));
        $this->assertNull($this->connection->get());

        $this->connection->send('the body', ['my' => 'header']);
        $envelope = $this->connection->get();
        $this->assertEquals('the body', $envelope['body']);
    }

    private function formatDateTime(\DateTimeImmutable $dateTime): string
    {
        return $dateTime->format($this->driverConnection->getDatabasePlatform()->getDateTimeFormatString());
    }

    private function createSchemaManager(): AbstractSchemaManager
    {
        return method_exists($this->driverConnection, 'createSchemaManager')
            ? $this->driverConnection->createSchemaManager()
            : $this->driverConnection->getSchemaManager();
    }
}