MissingRegistraton error when trying to send data to GCM - php

Question

I've searched a lot but couldn't find any solution for this question.
I'm using a PHP server and is trying to send PushNotifications to my Android app. But when I'm trying out my code in the browser I get this error: "Error=MissingRegistration".
Here is the code that I run:
registration_ids = array($regId);
$message = array(
'hangMessage' => $message,
'userId' => $user_id
);
$result = $gcm->send_notification($registration_ids, $message);
And this is the code that I call:
$url = "https://android.googleapis.com/gcm/send";
$fields = array(
'registration_ids' => $regisration_ids,
'data' => $message,
);
$headers = array(
'Authorization: key=' . GOOGLE_API_KEY,
'Content-Type= application/json',
);
//Open connection
$ch = curl_init();
//Set the url, number of POST vars, POST data
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
//Disabling SSL Certificate support temporarly
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
curl_setopt($ch, CURLOPT_POSTFIELDS, json_encode($fields));
//Execute psot
$result = curl_exec($ch);
if($result == false){
die('Curl failed: ' . Curl_error($ch));
}
//Close connection
curl_close($ch);
echo $result;
The Request doesn't even come all the way to the server according to the Google APIs Console Report system.
Anyone have any idea what could be wrong?

Answer 1

Your request should look like this :
Content-Type:application/json
Authorization:key=AIzaSyB-1uEai2WiUapxCs2Q0GZYzPu7Udno5aA
{
"registration_ids" : ["APA91bHun4MxP5egoKMwt2KZFBaFUH-1RYqx..."],
"data" : {
...
},
}
Therefore I believe the error might be in this line :
'Content-Type= application/json'
Try to change the = to :.
Since the content type header is invalid, the GCM server may assume a default value for the content type (which might be application/x-www-form-urlencoded;charset=UTF-8, in which case the Registration ID requires a different key, which would explain the MissingRegistration error).
BTW, the fact that you get a MissingRegistraton error means that the request does reach the GCM server. GCM requests are not logged in the Google APIs Console Report system.