first commit

system/Debug/ExceptionHandlerInterface.php

@@ -0,0 +1,32 @@
+<?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\Debug;
+
+use CodeIgniter\HTTP\RequestInterface;
+use CodeIgniter\HTTP\ResponseInterface;
+use Throwable;
+
+interface ExceptionHandlerInterface
+{
+    /**
+     * Determines the correct way to display the error.
+     */
+    public function handle(
+        Throwable $exception,
+        RequestInterface $request,
+        ResponseInterface $response,
+        int $statusCode,
+        int $exitCode,
+    ): void;
+}