Error gots thrown if a non Model ist in app/ folder

I know it's not the nicest fix but maybe someone comes up with a better solution.

I had my helpers.php file in app/ and an error got thrown cause $classes[0] wasn't set.

src/helpers.php

@@ -94,6 +94,8 @@ function getClassNameFromFile($filePathName)
                 $classes[] = $class_name;
             }
         }
-
+        if (!isset($classes[0]) {
+            return 'no_class_found_in_file';
+        }
         return $classes[0];
     }