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system/HTTP/Exceptions/BadRequestException.php

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+<?php
+
+declare(strict_types=1);
+
+/**
+ * This file is part of CodeIgniter 4 framework.
+ *
+ * (c) CodeIgniter Foundation <admin@codeigniter.com>
+ *
+ * For the full copyright and license information, please view
+ * the LICENSE file that was distributed with this source code.
+ */
+
+namespace CodeIgniter\HTTP\Exceptions;
+
+use CodeIgniter\Exceptions\HTTPExceptionInterface;
+use RuntimeException;
+
+/**
+ * 400 Bad Request
+ */
+class BadRequestException extends RuntimeException implements HTTPExceptionInterface
+{
+    /**
+     * HTTP status code for Bad Request
+     *
+     * @var int
+     */
+    protected $code = 400; // @phpstan-ignore-line
+}