Use a config.php file

app/Controller.php

@@ -7,6 +7,9 @@ class Controller {
 
     // Function called before routing
     function beforeRoute($f3, $args) {
+        // Include configuration
+        require_once('config.php');
+
         // Languages available
         $languages = array(
             array("iso" => "fr", "name"=>"Français"),