"registration_ids" field is not a JSON array (Firebase)
Solution 1
I used to
rather than sending array of Firebase tokens as registration_ids
. Cause registration_ids
having the limit of 1000 number of firebase tokens only https://firebase.google.com/docs/cloud-messaging/http-server-ref.
function fetchFirebaseTokenUsers($message) {
$query = "SELECT token FROM firebase_tokens";
$fcmRegIds = array();
if($query_run = mysqli_query($this->con, $query)) {
while($query_row = mysqli_fetch_assoc($query_run)) {
array_push($fcmRegIds, $query_row['token']);
}
}
if(isset($fcmRegIds)) {
foreach ($fcmRegIds as $key => $token) {
$pushStatus = $this->sendPushNotification($token, $message);
}
}
}
function sendPushNotification($registration_ids, $message) {
ignore_user_abort();
ob_start();
$url = 'https://fcm.googleapis.com/fcm/send';
$fields = array(
'to' => $registration_ids,
'data' => $message,
);
define('GOOGLE_API_KEY', 'AIzaSyC.......VdYCoD8A');
$headers = array(
'Authorization:key='.GOOGLE_API_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_SSL_VERIFYPEER, false);
curl_setopt($ch, CURLOPT_POSTFIELDS, json_encode($fields));
$result = curl_exec($ch);
if($result === false)
die('Curl failed ' . curl_error());
curl_close($ch);
return $result;
ob_flush();
}
Solution 2
If you Used registration_ids
you need to passed data in array as follow:
PHP:
$fields = array(
'registration_ids' => array($registration_ids),
'data' => $message,
);
Solution 3
If registration_ids is just one Token as stated at https://firebase.google.com/docs/cloud-messaging/http-server-ref you should use the field 'to'.
FCM requires registered_ids to be a JSON Array with indexes starting from 0. I have the same error because the indexes where not these. I solved it using the PHP function array_values.
function sendPushNotification($registration_ids, $message) {
ignore_user_abort();
ob_start();
$url = 'https://fcm.googleapis.com/fcm/send';
//FCM requires registration_ids array to have correct indexes, starting from 0
$registration_ids = array_values($registration_ids);
$numTokens = count($registration_ids);
if($numTokens == 1){
$fields = array(
'to' => $registration_ids[0],
'data' => $message,
);
}elseif($numTokens > 1){
$fields = array(
'registration_ids' => $registration_ids,
'data' => $message,
);
}
define('GOOGLE_API_KEY', 'AIzaSyC.......VdYCoD8A');
$headers = array(
'Authorization:key='.GOOGLE_API_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_SSL_VERIFYPEER, false);
curl_setopt($ch, CURLOPT_POSTFIELDS, json_encode($fields));
$result = curl_exec($ch);
if($result === false)
die('Curl failed ' . curl_error());
curl_close($ch);
return $result;
ob_flush();
}
Sanket
Updated on June 09, 2022Comments
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Sanket almost 2 years
I am facing problem with Firebase "registration_ids". When I send the request from Rest Client i get the successful response.
{"multicast_id":4650719213012935695,"success":2,"failure":0,"canonical_ids":0,"results":[{"message_id":"0:1468837777484579%214918aff9fd7ecd"},{"message_id":"0:1468837777484484%214918aff9fd7ecd"}]}
But when I call same php script from my Android application it gives me error in the response. (I got the response in Charles Proxy)
"registration_ids" field is not a JSON array
Here is my php script
function fetchFirebaseTokenUsers($message) { $query = "SELECT token FROM firebase_tokens"; $fcmRegIds = array(); if($query_run = mysqli_query($this->con, $query)) { while($query_row = mysqli_fetch_assoc($query_run)) { array_push($fcmRegIds, $query_row['token']); } } if(isset($fcmRegIds)) { $pushStatus = $this->sendPushNotification($fcmRegIds, $message); } } function sendPushNotification($registration_ids, $message) { ignore_user_abort(); ob_start(); $url = 'https://fcm.googleapis.com/fcm/send'; $fields = array( 'registration_ids' => $registration_ids, 'data' => $message, ); define('GOOGLE_API_KEY', 'AIzaSyC.......VdYCoD8A'); $headers = array( 'Authorization:key='.GOOGLE_API_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_SSL_VERIFYPEER, false); curl_setopt($ch, CURLOPT_POSTFIELDS, json_encode($fields)); $result = curl_exec($ch); if($result === false) die('Curl failed ' . curl_error()); curl_close($ch); return $result; ob_flush(); }
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Umair Hamid almost 7 yearsThis will loop upto 1000 for 1000 users.. not a good approach at all
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JustRandom over 5 yearsI don't recommend this solution. It does unlimited POST requests in a very short time. You could get on some firewall blacklists with this solution for spamming.