Dynamically jQuery not posting add inputs of a form after the .append()
<p>Excese me, I use appends add inputs , but post form is not add inputs data.</p>

<p>Please talk me, how can I do , Thank very much!</p>

<p>HTML code</p>

<pre><code>&lt;form class="form_a" action="test_a.php" method="POST" &gt;
    &lt;div class="language"&gt;
        &lt;div class="append"&gt;

        &lt;/div&gt;
        &lt;button type="button" class="add"&gt;add Button&lt;/buttond&gt;

        &lt;input type="submit" value="click me submit form"&gt;
    &lt;/div&gt;
&lt;/form&gt;
</code></pre>

<p>Javascript code</p>

<pre><code>$('.language .add').click(function(){
    $('.language .append').append(
        '&lt;input name="language[]" class="form-control" value="test"&gt;'
    );
});
</code></pre>

<p>PHP code</p>

<pre><code>&lt;?php
  print_r($_POST);
?&gt;
</code></pre>