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vendor/workerman/validation/library/Rules/IntVal.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 is_int;
+use function is_string;
+use function preg_match;
+
+/**
+ * Validates if the input is an integer.
+ *
+ * @author Adam Benson <adam.benson@bigcommerce.com>
+ * @author Alexandre Gomes Gaigalas <alganet@gmail.com>
+ * @author Andrei Drulchenko <andrdru@gmail.com>
+ * @author Danilo Benevides <danilobenevides01@gmail.com>
+ * @author Henrique Moody <henriquemoody@gmail.com>
+ */
+final class IntVal extends AbstractRule
+{
+    /**
+     * {@inheritDoc}
+     */
+    public function validate($input): bool
+    {
+        if (is_int($input)) {
+            return true;
+        }
+
+        if (!is_string($input)) {
+            return false;
+        }
+
+        return preg_match('/^-?\d+$/', $input) === 1;
+    }
+}