title: Facebook Inbound replies through Nexmo API in PHP
body: <p>Am working on a facebook chat bot using Nexmos facebook message API with PHP. I succeeded in sending a message in sandbox to facebook. However, get a reply when through the inbound webhook call back is a hard nut now.</p>
  
  <p>NEXMO documentation is not that well detailed to help me get done with the TASK.
  Any Help on how i can the reply message when a user on facebook replies to the page's chat?</p>
  
  <pre><code>function inbound() {
          $this-&gt;load_model("Api_model")-&gt;save_inbound_prod_message($_POST);
      }
  </code></pre>
  
  <p>In that above code, i expected to have some data sent to me through $_POST however, the variable is empty.</p>
  
  <p>THank you for your help</p>