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vendor/workerman/validation/library/Rules/FalseVal.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 filter_var;
+
+use const FILTER_NULL_ON_FAILURE;
+use const FILTER_VALIDATE_BOOLEAN;
+
+/**
+ * Validates if a value is considered as false.
+ *
+ * @author Danilo Correa <danilosilva87@gmail.com>
+ * @author Henrique Moody <henriquemoody@gmail.com>
+ */
+final class FalseVal extends AbstractRule
+{
+    /**
+     * {@inheritDoc}
+     */
+    public function validate($input): bool
+    {
+        return filter_var($input, FILTER_VALIDATE_BOOLEAN, FILTER_NULL_ON_FAILURE) === false;
+    }
+}