does $_SESSION[] conflicts with defined class?
<p>I called  a  class by:</p>

<pre><code>$user = new user;
</code></pre>

<p>Then i defined  a session variable:</p>

<pre><code>$_SESSION['user']= 'username';
</code></pre>

<p>in my script if  i echo  used <code>$_SESSION['user']</code> in some function it showed;</p>

<pre><code>Catchable fatal error: Object of class user could not be converted to string in /home/username/public_html/cart-admin/include/classes/class.auth.php
</code></pre>
