File upload, change name : <p>I have a file upload script which works fine, however it currently saves the document under the original file name, I want to rename this on upload, ideally adding an ID number before it (from GET variable, below)</p>

<pre><code>$employee=$_GET["id"];
</code></pre>

<p>The file upload script, where the name comes from is below:</p>

<pre><code>$file_name = $key.$_FILES['files']['name'][$key];
</code></pre>

<p>How can I add the ID number before the name upon saving?</p>
