How to deal with pass a value twice in a PHP file
<p>I am working on modification of a program. There are two value passes happened in one PHP file, and I get a notification from system like this:</p>

<pre><code>Notice: Undefined index: content in /Users/alexhu/NetBeansProjects/menagerie/svn/trunk/apps/frontend/modules/legacy/legacy_lib/content/utilities/hraprint.php on line 23
</code></pre>

<p>And</p>

<pre><code>Notice: Undefined index: isProvena in /Users/alexhu/NetBeansProjects/menagerie/svn/trunk/apps/frontend/modules/legacy/legacy_lib/content/utilities/hraprint.php on line 24
</code></pre>

<p>How to avoid it?</p>
