Here is some of my comments: Don't hardcode error levels like you do in your bootstrap file (wireframe.php) ini_set('display_errors', 1); I am not a fan

Here is some of my comments: Don't hardcode error levels like you do in your bootstrap file (wireframe.php) ini_set('display_errors', 1); I am not a fan of setting title from some HTML comments, I can't really understand why you would do this when writing a PHP framework, as you wouldn't be able to make dynamic titles. While nothing wrong with this code as such: if (file_exists($file)) { return true; } else { return false; } It is unnecessary to explicitly return true or false, return file_exists($file); Would have done the same... Lastly I really think that you should consider using PSR-4 style autoloading for your internal classes, I see no point in not doing it.