HighSpeaker/vendor/workerman/validation/library/Rules/PrimeNumber.php
2022-12-24 22:10:40 +08:00

53 lines
1.2 KiB
PHP

<?php
/*
* This file is part of Respect/Validation.
*
* (c) Alexandre Gomes Gaigalas <alexandre@gaigalas.net>
*
* For the full copyright and license information, please view the LICENSE file
* that was distributed with this source code.
*/
declare(strict_types=1);
namespace Respect\Validation\Rules;
use function ceil;
use function is_numeric;
use function sqrt;
/**
* Validates whether the input is a prime number.
*
* @author Alexandre Gomes Gaigalas <alexandre@gaigalas.net>
* @author Camilo Teixeira de Melo <kmilotxm@gmail.com>
* @author Henrique Moody <henriquemoody@gmail.com>
* @author Ismael Elias <ismael.esq@hotmail.com>
* @author Kleber Hamada Sato <kleberhs007@yahoo.com>
*/
final class PrimeNumber extends AbstractRule
{
/**
* {@inheritDoc}
*/
public function validate($input): bool
{
if (!is_numeric($input) || $input <= 1) {
return false;
}
if ($input != 2 && ($input % 2) == 0) {
return false;
}
for ($i = 3; $i <= ceil(sqrt((float) $input)); $i += 2) {
if (($input % $i) == 0) {
return false;
}
}
return true;
}
}