philiplb / Valdi

src/Valdi/Validator/AbstractFilter.php

<?php

/*
 * This file is part of the Valdi package.
 *
 * (c) Philip Lehmann-Böhm <philip@philiplb.de>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace Valdi\Validator;

/**
 * Base validator for PHPs filter_var function.
 */
abstract class AbstractFilter implements ValidatorInterface
{

    /**
     * Gets the filter to use within the validation.
     * See http://php.net/manual/de/filter.filters.validate.php .
     *
     * @return string - the filter to use
     */
    abstract protected function getFilter();

    /**
     * Gets the flags to use within the validation.
     * See http://php.net/manual/de/filter.filters.validate.php .
     *
     * @return string|null - the flags to use
     */
    protected function getFlags()
    {
        return null;
    }

    /**
     * {@inheritdoc}
     */
    public function isValid($value, array $parameters)
    {
        return in_array($value, ['', null], true) ||
            filter_var($value, $this->getFilter(), $this->getFlags()) !== false;

$this->getFlags() of type null is incompatible with the type array|integer expected by parameter $options of filter_var().

    }
}