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vendor/workerman/validation/library/Rules/Pis.php

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+<?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 is_scalar;
+use function mb_strlen;
+use function preg_match;
+use function preg_replace;
+
+/**
+ * Validates a Brazilian PIS/NIS number.
+ *
+ * @author Bruno Koga <brunokoga187@gmail.com>
+ * @author Danilo Correa <danilosilva87@gmail.com>
+ * @author Henrique Moody <henriquemoody@gmail.com>
+ */
+final class Pis extends AbstractRule
+{
+    /**
+     * {@inheritDoc}
+     */
+    public function validate($input): bool
+    {
+        if (!is_scalar($input)) {
+            return false;
+        }
+
+        $digits = (string) preg_replace('/\D/', '', (string) $input);
+        if (mb_strlen($digits) != 11 || preg_match('/^' . $digits[0] . '{11}$/', $digits)) {
+            return false;
+        }
+
+        $multipliers = [3, 2, 9, 8, 7, 6, 5, 4, 3, 2];
+
+        $summation = 0;
+        for ($position = 0; $position < 10; ++$position) {
+            $summation += (int) $digits[$position] * $multipliers[$position];
+        }
+
+        $checkDigit = (int) $digits[10];
+
+        $modulo = $summation % 11;
+
+        return $checkDigit === ($modulo < 2 ? 0 : 11 - $modulo);
+    }
+}