Set FCM channel ID in PHP for notifications - php

Question

I'm trying to send FCM notification to Android device using PHP. My code is working for devices before Android O.
In Android O, we need to set channel ID in request as well to receive notifications, which I cannot figure out how to do.
I have done the necessary setup in the app and using Firebase Console I can receive a notification, but it fails when I try sending it through the PHP script.
I also looked into the link below but it doesn't work for me.
Android FCM define channel ID and send notification to this channel through PHP
My PHP code:
$notification = new Notification();
$notification->setTitle("startSession");
$notification->setBody($_POST['child_id']);
$notification->setNotificationChannel('my_channel_id');
$requestData = $notification->getNotification();
$firebase_token = $_POST['token'];
$firebase_api = 'my_value';
$fields = array(
'to' => $firebase_token,
'data' => $requestData,
);
$url = 'https://fcm.googleapis.com/fcm/send';
$headers = array(
'Authorization: key=' . $firebase_api,
'Content-Type: application/json'
);
$ch = curl_init();
// Set the url, number of POST vars, POST data
curl_setopt($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));
// Execute post
$result = curl_exec($ch);
if($result === FALSE){
die('Curl failed: ' . curl_error($ch));
$return_obj = array('responseCode'=>'0' , 'responseMsg'=> 'Error inserting, please try
again.', 'errorCode'=>'1');
}else{
$return_obj = array('responseCode'=>'1' , 'responseMsg'=> 'Successfully inserted.',
'errorCode'=>'0');
}
// Close connection
echo json_encode($return_obj);
curl_close($ch);
My notification class code is:
<?php
class Notification{
private $title;
private $body;
private $answer_value;
private $android_channel_id;
function __construct(){
}
public function setTitle($title){
$this->title = $title;
}
public function setBody($body){
$this->body = $body;
}
public function setAnswer($answer){
$this->answer_value = $answer;
}
public function setNotificationChannel($channel){
$this->android_channel_id = $channel;
}
public function getNotificatin(){
$notification = array();
$notification['title'] = $this->title;
$notification['body'] = $this->body;
$notification['answer'] = $this->answer_value;
$notification['android_channel_id'] = $this->android_channel_id;
return $notification;
}
}
?>
I'm sure the syntax is correct as the notification still works on devices with Android < 26.
Any help will be really appreciated. Thanks!

Answer 1

You can set your channel Id in server side PHP
PHP server side
<?php
function Notify($title,$body,$target,$chid)
{
define( 'API_ACCESS_KEY', 'enter here your API Key' );
$fcmMsg = array(
'title' => $title,
'body' => $body,
'channelId' => $chid,
);
$fcmFields = array(
'to' => $target, //tokens sending for notification
'notification' => $fcmMsg,
);
$headers = array(
'Authorization: key=' . API_ACCESS_KEY,
'Content-Type: application/json'
);
$ch = curl_init();
curl_setopt( $ch,CURLOPT_URL, 'https://fcm.googleapis.com/fcm/send' );
curl_setopt( $ch,CURLOPT_POST, true );
curl_setopt( $ch,CURLOPT_HTTPHEADER, $headers );
curl_setopt( $ch,CURLOPT_RETURNTRANSFER, true );
curl_setopt( $ch,CURLOPT_SSL_VERIFYPEER, true );
curl_setopt( $ch,CURLOPT_POSTFIELDS, json_encode( $fcmFields ) );
$result = curl_exec($ch );
curl_close( $ch );
echo $result . "\n\n";
}
?>
I define function Notify with 4 parameters title,body,target,chid to use it just call the function and define its parameters,
You must add your channelId in your client side (Android part), with
out channelId you can't get notifications in Android 8.0 and later