PHP Function Call Returns Fatal Error
<p>For some reason my PHP function call <code>&lt;? r(); ?&gt;</code> returns a fatal error.  Any help?</p>

<pre><code>&lt;?php
//$r is previously assigned
function r() {
    echo ( $r );
};
?&gt;

&lt;html&gt;
    &lt;head&gt;
        &lt;link type="text/css" rel="stylesheet" href="&lt;? r(); ?&gt;rs/css/master.css"&gt;
    &lt;/head&gt;
</code></pre>
