Notice: Undefined variable:
<pre><code>Notice: Undefined variable: admin_username in D:\xampp\htdocs\site\lib\configuration.php on line 63

Notice: Undefined variable: signin_username in D:\xampp\htdocs\site\lib\configuration.php on line 76
</code></pre>

<p>I can't get rid of this errors. I simply don't understand why does it say it's not defined since it is defined few lines before. I'm really stuck here. Any idea is highly appreciated.</p>

<pre><code>if(isset($_SESSION['admin_username'])){ $admin_username = $_SESSION ['admin_username']; }
if(isset($_SESSION['admin_password'])){ $admin_password = $_SESSION['admin_password']; }
if(isset($_SESSION['admin_token'])){ $admin_token = $_SESSION['admin_token']; }
if($admin_username &amp;&amp; $admin_password &amp;&amp; $admin_token == session_id())
</code></pre>
