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vendor/workerman/validation/library/Rules/Even.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_VALIDATE_INT;
+
+/**
+ * Validates whether the input is an even number or not.
+ *
+ * @author Henrique Moody <henriquemoody@gmail.com>
+ * @author Jean Pimentel <jeanfap@gmail.com>
+ * @author Paul Karikari <paulkarikari1@gmail.com>
+ */
+final class Even extends AbstractRule
+{
+    /**
+     * {@inheritDoc}
+     */
+    public function validate($input): bool
+    {
+        if (filter_var($input, FILTER_VALIDATE_INT) === false) {
+            return false;
+        }
+
+        return (int) $input % 2 === 0;
+    }
+}