45 lines
1.1 KiB
PHP
45 lines
1.1 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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namespace Respect\Validation\Rules;
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class Imei extends AbstractRule
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{
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const IMEI_SIZE = 15;
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/**
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* @see https://en.wikipedia.org/wiki/International_Mobile_Station_Equipment_Identity
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*
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* @param string $input
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*
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* @return bool
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*/
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public function validate($input)
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{
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if (!is_scalar($input)) {
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return false;
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}
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$numbers = preg_replace('/\D/', '', $input);
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if (strlen($numbers) != self::IMEI_SIZE) {
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return false;
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}
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$sum = 0;
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for ($position = 0; $position < (self::IMEI_SIZE - 1); ++$position) {
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$number = $numbers[$position] * (($position % 2) + 1);
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$sum += ($number % 10) + intval($number / 10);
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}
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return ((ceil($sum / 10) * 10) - $sum == $numbers[14]);
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}
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}
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