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

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+<?php
+
+/*
+ * Copyright (c) Alexandre Gomes Gaigalas <alganet@gmail.com>
+ * SPDX-License-Identifier: MIT
+ */
+
+declare(strict_types=1);
+
+namespace Respect\Validation\Rules;
+
+use function array_map;
+use function floor;
+use function mb_strlen;
+use function str_split;
+
+/**
+ * Validates the access key of the Brazilian electronic invoice (NFe).
+ *
+ *
+ * (pt-br) Valida chave de acesso de NFe, mais especificamente, relacionada ao DANFE.
+ *
+ * @see (pt-br) Manual de Integração do Contribuinte v4.0.1 em http://www.nfe.fazenda.gov.br
+ *
+ * @author Andrey Knupp Vital <andreykvital@gmail.com>
+ * @author Danilo Correa <danilosilva87@gmail.com>
+ * @author Henrique Moody <henriquemoody@gmail.com>
+ */
+final class NfeAccessKey extends AbstractRule
+{
+    /**
+     * {@inheritDoc}
+     */
+    public function validate($input): bool
+    {
+        if (mb_strlen($input) !== 44) {
+            return false;
+        }
+
+        $digits = array_map('intval', str_split($input));
+        $w = [];
+        for ($i = 0, $z = 5, $m = 43; $i <= $m; ++$i) {
+            $z = $i < $m ? $z - 1 == 1 ? 9 : $z - 1 : 0;
+            $w[] = $z;
+        }
+
+        for ($i = 0, $s = 0, $k = 44; $i < $k; ++$i) {
+            $s += $digits[$i] * $w[$i];
+        }
+
+        $s -= 11 * floor($s / 11);
+        $v = $s == 0 || $s == 1 ? 0 : 11 - $s;
+
+        return $v == $digits[43];
+    }
+}