Firebase Web Push notification - codeigniter

Question

I am trying to send web push notification using firebase in angular5 and Codeignitor. After intialize firebase, I am able to get deviceToken to whoom I want to send push notification. When I am trying to send it at backend using curl. It always show me this error
{
"multicast_id":8778443463170192739,
"success":0,
"failure":1,
"canonical_ids":0,
"results":[
{
"error":"MismatchSenderId"
}
]
}
In backend api request, I am using "Server key" which is "AAAA8q7RESs:APA91bFrOrzgvTb0yQTqTF6huozIvgi_5xf1lY8qv5kyoDViuBYnVFr3Qfxg3DZHN_e7-AqWBIvRlQvPJkgZtxKIpCYs_aUUiYHOKuKLLJvzxAENjKmF4mCQJb94tJV8J-vBgnv0FPPY".
But always show same error.
My backend Php code is
public function sendpushnotification() {
$request = json_decode(file_get_contents('php://input'),true);
$url = 'https://fcm.googleapis.com/fcm/send';
$fields = array(
'registration_ids' => array($request['token']),
'data' => array( "message" => "Hello this is test push notification" ),
);
$headers = array(
'Authorization: key=AAAA8q7RESs:APA91bFrOrzgvTb0yQTqTF6huozIvgi_5xf1lY8qv5kyoDViuBYnVFr3Qfxg3DZHN_e7-AqWBIvRlQvPJkgZtxKIpCYs_aUUiYHOKuKLLJvzxAENjKmF4mCQJb94tJV8J-vBgnv0FPPY',
'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_POST, true );
curl_setopt( $ch, CURLOPT_HTTPHEADER, $headers);
curl_setopt( $ch, CURLOPT_RETURNTRANSFER, true );
curl_setopt( $ch, CURLOPT_POSTFIELDS, json_encode( $fields ) );
// Avoids problem with https certificate
curl_setopt( $ch, CURLOPT_SSL_VERIFYHOST, false);
curl_setopt( $ch, CURLOPT_SSL_VERIFYPEER, false);
// Execute post
$result = curl_exec($ch);
curl_close($ch);
echo json_encode($result);
}
Can anyone helps me. I have spend lot of time for this but not found any solution.
And I have a query. Is deviceToken/deviceID depends upon messageSenderID?

Answer 1

First of all try to send notification from FCM console giving deviceToken.
I have used below code and it's working fine. I wrote this function in helper and used it in multiple controllers.
Second thing: deviceToken/deviceID will be used for the user who will receive message.
function sendFCM($message, $id, $message_info='', $type ='') {
$API_ACCESS_KEY = "YOUR_FCM_SERVER_KEY";
$url = 'https://fcm.googleapis.com/fcm/send';
$fields = array (
'registration_ids' => array (
$id
),
'data' => array (
"message" => $message,
'message_info' => $message_info,
),
'priority' => 'high',
'notification' => array(
'title' => $message['title'],
'body' => $message['body'],
),
);
$fields = json_encode ( $fields );
$headers = array (
'Authorization: key=' . $API_ACCESS_KEY,
'Content-Type: application/json'
);
$ch = curl_init ();
curl_setopt ( $ch, CURLOPT_URL, $url );
curl_setopt ( $ch, CURLOPT_POST, true );
curl_setopt ( $ch, CURLOPT_HTTPHEADER, $headers );
curl_setopt ( $ch, CURLOPT_RETURNTRANSFER, true );
curl_setopt ( $ch, CURLOPT_POSTFIELDS, $fields );
$result = curl_exec ( $ch );
curl_close ( $ch );
}