navbar

composer.json

@@ -2,5 +2,8 @@
     "require": {
         "slim/slim": "4.*",
         "slim/psr7": "^1.5"
+    },
+    "config": {
+        "platform-check": false
     }
-}
+}

public/index.php

@@ -9,7 +9,12 @@ require __DIR__ . '/../vendor/autoload.php';
 $app = AppFactory::create();
 
 $app->get('/', function (Request $request, Response $response, $args) {
-    $response->getBody()->write("Hello world!");
+    $response->getBody()->write("<h1>Hello world!</h1>");
+    $response->getBody()->write("<ul>");
+    $response->getBody()->write('<li><a href="">Eerste</a></li>');
+    $response->getBody()->write('<li><a href="">Tweede</a></li>');
+    $response->getBody()->write('<li><a href="">derde</a></li>');
+    $response->getBody()->write("</ul>");
     return $response;
 });