<?php

namespace Laminas\InputFilter;

/**
 * Implementors of this interface may report on the existence of unknown input,
 * as well as retrieve all unknown values.
 */
interface UnknownInputsCapableInterface
{
    /**
     * Is the data set has unknown input ?
     *
     * @throws Exception\RuntimeException
     * @return bool
     */
    public function hasUnknown();

    /**
     * Return the unknown input
     *
     * @throws Exception\RuntimeException
     * @return array
     */
    public function getUnknown();
}
