title: Slack, sending and receiving messages
body: <p>I am new in slack and i would like to do a bot user in my channel.
  The problem is: every time that i want to send a message to slack i have to refresh my page (the page that receives the information from slack).
  I configured my Incoming Webhook with success.</p>
  
  <p>This is what i did to configured my incoming webhook with success in php:</p>
  
  <pre><code>header('Content-Type: application/json');
      $entityBody = file_get_contents('php://input');
      echo $entityBody;
  </code></pre>
  
  <p>My question is why do i have to refresh my page in order to receive or send messages to slack? </p>