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ab3732f91f
SPDX IDs are shorter than licensing notes previously used, and adhere better to FOSS standards. It is also machine-readable.
34 lines
744 B
PHP
34 lines
744 B
PHP
<?php
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/*
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* Copyright (c) Alexandre Gomes Gaigalas <alganet@gmail.com>
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* SPDX-License-Identifier: MIT
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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 floor;
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use function is_numeric;
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use function sqrt;
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/**
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* Validates whether the input is a perfect square.
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*
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* @author Danilo Benevides <danilobenevides01@gmail.com>
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* @author Henrique Moody <henriquemoody@gmail.com>
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* @author Kleber Hamada Sato <kleberhs007@yahoo.com>
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* @author Nick Lombard <github@jigsoft.co.za>
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*/
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final class PerfectSquare extends AbstractRule
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{
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/**
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* {@inheritDoc}
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*/
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public function validate($input): bool
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{
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return is_numeric($input) && floor(sqrt((float) $input)) == sqrt((float) $input);
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}
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}
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