PHP - different ways to define variables?
<p>What is difference in defining the variables like</p>

<pre><code>define('SITENAME', "My Site");
</code></pre>

<p>and</p>

<pre><code>$sitename = "My Site";
</code></pre>

<p>which way is better to define configuration variables (such as site name/urls etc.)?
Thanks.</p>
