Just one PHP page won't run - it wants to download
<p>All PHP pages are all running just fine on my site, except for one for which Firefox says "You have chosen to open checkpage.php which is a PHP script" and then wants me to select an application with which to open it.</p>

<p>The site is running PHP Version 5.2.10 on Centos 5.5.</p>

<p>I'm using exactly the same code on another site (PHP Version 5.2.10-2ubuntu6.4 on Ubuntu 9.10) and it's fine.  </p>

<p>I've Googled myself silly trying to work out what the issue is!  </p>

<p>Does anyone have any ideas why this one page might be causing a problem?  The page is about 200 lines long but I'll post it here if it'll help...</p>

<p>All thoughts much appreciated
Mike</p>

<p><strong>PasteBin:</strong> <a href="http://pastebin.com/A6uNj9CN" rel="nofollow">http://pastebin.com/A6uNj9CN</a></p>
