Moved the navigation to a function to avoid the 'headers already sent' problem

index.php

@@ -1,4 +1,8 @@
+<?PHP
 
+// This function just prints a simple navigation
+function navi () {
+	?>
 	Navigation:
 	<ul>
 	  <li><a href="/">home</a></li>
@@ -11,34 +15,45 @@ Navigation:
 	  <li><a href="/this-route-is-not-defined">404 Test</a></li>
 	  <li><a href="/this-route-is-defined">405 Test</a></li>
 	</ul>
-
 	<?PHP
+}
 
 // Include router class
 include('Route.php');
 
+// Add navigation route (startpage)
+Route::add('/',function(){
+  navi();
+  echo 'Welcome :-)';
+});
+
 // Add base route (startpage)
 Route::add('/',function(){
+  navi();
   echo 'Welcome :-)';
 });
 
 // Another base route example
 Route::add('/index.php',function(){
+  navi();
   echo 'You are not realy on index.php ;-)';
 });
 
 // Simple test route that simulates static html file
 Route::add('/test.html',function(){
+  navi();
   echo 'Hello from test.html';
 });
 
 // Post route example
 Route::add('/contact-form',function(){
+  navi();
   echo '<form method="post"><input type="text" name="test" /><input type="submit" value="send" /></form>';
 },'get');
 
 // Post route example
 Route::add('/contact-form',function(){
+  navi();
   echo 'Hey! The form has been sent:<br/>';
   print_r($_POST);
 },'post');
@@ -48,38 +63,45 @@ Route::add('/contact-form',function(){
 // Also users could inject mysql-code or other untrusted data if you use (.*)
 // You should better use a saver expression like /user/([0-9]*)/edit or /user/([A-Za-z]*)/edit
 Route::add('/user/(.*)/edit',function($id){
+  navi();
   echo 'Edit user with id '.$id.'<br/>';
 });
 
 // Accept only numbers as parameter. Other characters will result in a 404 error
 Route::add('/foo/([0-9]*)/bar',function($var1){
+  navi();
   echo $var1.' is a great number!';
 });
 
 // Crazy route with parameters
 Route::add('/(.*)/(.*)/(.*)/(.*)',function($var1,$var2,$var3,$var4){
+  navi();
   echo 'This is the first match: '.$var1.' / '.$var2.' / '.$var3.' / '.$var4.'<br/>';
 });
 
 // Long route example
 // This route gets never triggered because the route before matches too
 Route::add('/foo/bar/foo/bar',function(){
+  navi();
   echo 'This is the second match <br/>';
 });
 
 // 405 test
 Route::add('/this-route-is-defined',function(){
+  navi();
   echo 'You need to patch this route to see this content';
 },'patch');
 
 // Add a 404 not found route
 Route::pathNotFound(function($path){
+  navi();
   echo 'Error 404 :-(<br/>';
   echo 'The requested path "'.$path.'" was not found!';
 });
 
 // Add a 405 method not allowed route
 Route::methodNotAllowed(function($path, $method){
+  navi();
   echo 'Error 405 :-(<br/>';
   echo 'The requested path "'.$path.'" exists. But the request method "'.$method.'" is not allowed on this path!';
 });