How to get Firebase notification status (opened or not) which is sent from PHP backend?
<p>When I send any notification from Firebase console, I can monitor my notification status (how many device received or how many opened it) from Firebase console.</p>

<p>Now I developed a PHP backend and using <code>curl</code> I can send notification to my users. I need to monitor <strong><em>How many devices are received my notification and how many devices opened it?</em></strong> for each notification.</p>

<p>Is it possible? Please let me know about best practice.
Thank you.</p>