title: How do I get data from Webhook to store in a database?
body: <p>I am working with a Webhook based of of SendGrid's API v3. The Webhook is completely set up with an endpoint that SendGrid posts to, but I need to be able to receive that parsed data and store it in a database using PHP, but do not know how to do that.</p>
  
  <p>I have worked with APIs before where I initiate the retrieval or POST of data, but when the API server is the one POSTing, how do I catch the data being parsed through the Webhook endpoint? I have some simple thus far, but am really unclear of how to tackle this:</p>
  
  <pre><code>&lt;?php
  
  $json = file_get_contents('https://example.com/webhook.php');
  $json_decoded = json_decode($json, true);
  $var_dump(json_decoded);
  
  ?&gt;
  </code></pre>
  
  <p>I have tried sending multiple emails to the host, but every time I make this call I return <code>NULL</code>.</p>