Initial

system/Router/Exceptions/RedirectException.php

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+<?php
+
+/**
+ * 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\Router\Exceptions;
+
+use Exception;
+
+/**
+ * RedirectException
+ */
+class RedirectException extends Exception
+{
+    /**
+     * Status code for redirects
+     *
+     * @var int
+     */
+    protected $code = 302;
+}

system/Router/Exceptions/RouterException.php

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+<?php
+
+/**
+ * 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\Router\Exceptions;
+
+use CodeIgniter\Exceptions\FrameworkException;
+
+/**
+ * RouterException
+ */
+class RouterException extends FrameworkException
+{
+    /**
+     * Thrown when the actual parameter type does not match
+     * the expected types.
+     *
+     * @return RouterException
+     */
+    public static function forInvalidParameterType()
+    {
+        return new static(lang('Router.invalidParameterType'));
+    }
+
+    /**
+     * Thrown when a default route is not set.
+     *
+     * @return RouterException
+     */
+    public static function forMissingDefaultRoute()
+    {
+        return new static(lang('Router.missingDefaultRoute'));
+    }
+
+    /**
+     * Throw when controller or its method is not found.
+     *
+     * @return RouterException
+     */
+    public static function forControllerNotFound(string $controller, string $method)
+    {
+        return new static(lang('HTTP.controllerNotFound', [$controller, $method]));
+    }
+
+    /**
+     * Throw when route is not valid.
+     *
+     * @return RouterException
+     */
+    public static function forInvalidRoute(string $route)
+    {
+        return new static(lang('HTTP.invalidRoute', [$route]));
+    }
+}