mirror of
https://github.com/Respect/Validation.git
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53 lines
1 KiB
PHP
53 lines
1 KiB
PHP
<?php
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/*
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* This file is part of Respect/Validation.
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*
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* (c) Alexandre Gomes Gaigalas <alexandre@gaigalas.net>
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*
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* For the full copyright and license information, please view the "LICENSE.md"
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* file that was distributed with this source code.
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*/
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declare(strict_types=1);
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namespace Respect\Validation\Rules;
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use function array_diff;
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use function is_array;
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/**
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* Validates whether the input is a subset of a given value.
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*
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* @author Henrique Moody <henriquemoody@gmail.com>
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* @author Singwai Chan <singwai.chan@live.com>
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*/
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final class Subset extends AbstractRule
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{
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/**
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* @var array
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*/
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private $superset;
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/**
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* Initializes the rule.
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*
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* @param array $superset
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*/
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public function __construct(array $superset)
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{
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$this->superset = $superset;
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}
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/**
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* {@inheritdoc}
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*/
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public function validate($input): bool
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{
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if (!is_array($input)) {
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return false;
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}
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return [] === array_diff($input, $this->superset);
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}
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}
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