PHP will not echo variables : <p>I have the following very basic PHP script:</p>

<pre><code>    &lt;?php
$username = $_POST['username'];
$password = $_POST['password'];

echo "This is the username: ";
echo $username;
?&gt;
</code></pre>

<p>And this is the output:</p>

<pre><code>This is the username: 
</code></pre>

<p>I have my username and password parameters in my url. Why won't it echo the username?</p>
