PHP's $_POST doesn't like how I post
<p>As everyone knows, PHP has a <code>$_POST</code> variable that stores data from POST requests.</p>

<p>I'm trying to use it with XHR..</p>

<pre><code>xhr.send('hey=hello&amp;hi=there'); 
</code></pre>

<p>..but it doesn't work..</p>

<pre><code>echo $_POST['hey'] . ' ' . $_POST['hi']; # The page should say "hello there", but it doesn't.
</code></pre>

<p>I'm am I sending the data wrong?</p>

<p>Do I need to change my php.ini?</p>

<p>How do I get this to work? :(</p>
