iOS 10 HTTP/2 apns-collapse-id header

[nesterenkodm]

APNS now provides a new header apns-collapse-id to support notifications collapsing on iOS 10. Can you support this feature in your app?

[blommegard]

Fantastic news, will have a look at the session right away!

[jahnaviwisdom-zz]

@blommegard can you please tell me how to use in headers from backend service? Currently im using this but not working
$headers = array(
'Authorization: key=' . $FIREBASE_API_KEY,
'Content-Type: application/json',
'apns-collapse-id':'1'
);