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35 lines
727 B
PHP
35 lines
727 B
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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namespace Respect\Validation\Rules;
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class PrimeNumber extends AbstractRule
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{
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public function validate($input)
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{
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if (!is_numeric($input) || $input <= 1) {
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return false;
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}
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if ($input != 2 && ($input % 2) == 0) {
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return false;
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}
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for ($i = 3; $i <= ceil(sqrt($input)); $i += 2) {
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if (($input % $i) == 0) {
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return false;
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}
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}
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return true;
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}
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}
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