Double::convertTo

static function convertTo(FieldType $fieldType, $value, $toTypeClass)
{
	/** @var Base $toTypeClass */
	$type = $toTypeClass::getType();
	switch ($type)
	{
		case FieldType::BOOL:
			$value = (bool)$value ? 'Y' : 'N';
			break;
		case FieldType::DATE:
			$value = date(MainTypeDate::convertFormatToPhp(FORMAT_DATE), (int)$value);
			break;
		case FieldType::DATETIME:
			$value = date(MainTypeDateTime::convertFormatToPhp(FORMAT_DATETIME), (int)$value);
			break;
		case FieldType::DOUBLE:
			$value = (float)$value;
			break;
		case FieldType::INT:
			$value = (int)$value;
			break;
		case FieldType::STRING:
		case FieldType::TEXT:
			$value = (string) $value;
			break;
		case FieldType::USER:
			$value = 'user_'.(int)$value;
			break;
		default:
			$value = null;
	}

	return $value;
}