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ci4/app/Controllers/Viewmode.php

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+<?php
+
+namespace App\Controllers;
+
+use App\Controllers\BaseController;
+
+class Viewmode extends BaseController
+{
+    public function index($view_mode = VIEW_MODE_IMPRESION)
+    {
+        $session = session();
+        $viewMode = $view_mode;
+        $session->remove('view_mode');
+        $session->set('view_mode', $viewMode);
+        $url = previous_url();
+        return redirect()->to($url);
+    }
+}