title: How to check if $data variable is set with Codeigniter?
body: <p>When I set a data like <code>$data['say_something'] = 'Hello';</code> and send it to the view with <code>$this-&gt;load-&gt;view('my_page', $data);</code>, how can I check in the view if the variable $say_something is set? Is there a Codeigniter function to this or something?</p>