Why is PHP $_FILES always null
<p>I have HTML like</p>

<pre><code>&lt;form action="send.php" method="post" enctype="multipart/form-data"&gt;
    &lt;div&gt;
        &lt;label for="subject"&gt;Subject&lt;/label&gt;
        &lt;input type="text" name="subject" /&gt;
    &lt;/div&gt;
    &lt;div&gt;
        &lt;label for="image"&gt;Image&lt;/label&gt;
        &lt;input type="file" name="image" /&gt;
    &lt;/div&gt;
    &lt;input type="submit" value="Send" /&gt;
&lt;/form&gt;
</code></pre>

<p>I keep getting <code>null</code> for <code>$_FILES</code> why is that?</p>
