isset($_POST['submit']) vs $_SERVER['REQUEST_METHOD']=='POST'
<p>I have come across scripts that use:</p>

<pre><code>isset($_POST['submit'])
</code></pre>

<p>as well as code that uses:</p>

<pre><code>$_SERVER['REQUEST_METHOD']=='POST'
</code></pre>

<p>I was wondering the difference between these two and which method is best.</p>
