title: REQUEST_URI of a php document is "favicon.ico" or a stylesheet's filename
body: <p>I log traffic coming in to my site. I get a user's landing page by looking at the REQUEST_URI of the first page they come to. The site is all php so every page includes a file that has, among some other things:</p>
  
  <pre><code>$_SESSION['landing']=$_SERVER['REQUEST_URI'];
  </code></pre>
  
  <p>I also log traffic going out.  I've noticed two kinds of entries for $_SESSION['landing'] though that don't quite make sense. I'll see either: "favicon.ico" or "ie8.css" </p>
  
  <p>Favicon is just a favicon:</p>
  
  <pre><code>&lt;link rel="shortcut icon" href="http://www.SITE.com/images/favicon.ico" /&gt; 
  </code></pre>
  
  <p>ie8.css is a stylesheet that fixes a couple of things so they'll look right in IE8. I include it like this:</p>
  
  <pre><code>&lt;!--[if lt IE 9]&gt;
  &lt;link rel="stylesheet" type="text/css" href="/ie8.css" /&gt;
  &lt;![endif]--&gt;
  </code></pre>
  
  <p>Why would these show up as the $_SERVER['REQUEST_URI'] for a php document? </p>