BaseField::prepareCodes

public function prepareCodes(array $values): array
{
	$result = [];

	foreach($values as $value)
	{
		if(!is_string($value))
		{
			continue;
		}

		$value = $this->prepareCode($value);
		if($value !== '')
		{
			$result[] = $value;
		}
	}

	return array_unique($result);
}