get value of checkbox in symfony
<p>I want to get the value of checkbox (checked or not), but the checkedbox not added to the form type. this is an example</p>

<pre><code>&lt;input type="checkbox" class="checkbox" id="smsflash"&gt;
</code></pre>

<p>I ask if there are a possibility to get the value of the checkedbox in the controller or not, and how?</p>