Sending Firebase notification with PHP

try this code.Its working fine for me.just change key and token

<?php
define('API_ACCESS_KEY','Api key from Fcm add here');
 $fcmUrl = 'https://fcm.googleapis.com/fcm/send';
 $token='235zgagasd634sdgds46436';

     $notification = [
            'title' =>'title',
            'body' => 'body of message.',
            'icon' =>'myIcon', 
            'sound' => 'mySound'
        ];
        $extraNotificationData = ["message" => $notification,"moredata" =>'dd'];

        $fcmNotification = [
            //'registration_ids' => $tokenList, //multple token array
            'to'        => $token, //single token
            'notification' => $notification,
            'data' => $extraNotificationData
        ];

        $headers = [
            'Authorization: key=' . API_ACCESS_KEY,
            'Content-Type: application/json'
        ];


        $ch = curl_init();
        curl_setopt($ch, CURLOPT_URL,$fcmUrl);
        curl_setopt($ch, CURLOPT_POST, true);
        curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
        curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
        curl_setopt($ch, CURLOPT_POSTFIELDS, json_encode($fcmNotification));
        $result = curl_exec($ch);
        curl_close($ch);


        echo $result;

I use the following function to send a HTTP Request to Firebase:

function request($url, $body, $method = "POST", $header = "Content-type: application/x-www-form-urlencoded\r\n")
{
    switch ($method) {
        case 'POST':
        case 'GET':
        case 'PUT':
        case 'DELETE':
            break;
        default:
            $method = 'POST';
            break;
    }
    $options = array(
        'http' => array(
            'header' => "$header",
            'method' => "$method",
            'content' => $body
        )
    );
    $context = stream_context_create($options);
    $data = file_get_contents($url, false, $context);
    $data = json_decode($data, true);
    return $data;
}

To execute the function I use the following code:

$fcm_key = "";
$body = array("data" => $data, "to" => "$fcm_token");

$body = json_encode($body);
$json = request("https://fcm.googleapis.com/fcm/send", $body, "POST", "Authorization: key=$fcm_key\r\nContent-Type:application/json");

For me, this code works without any problems. Be sure that you use the right FCM device token ($fcm_token) and set the right FCM key ($fcm_key).

                $tokenID = $valueTwo["TokenID"];
                $cmMessage = array();
                $cmMessage["type"] = 3;
                $cmMessage["receiverMail"] = $receiverMail;
                $cmMessage["ownerMail"] = $ownerMail;
                $cmMessage["jsonData"] = $jsonData;




                $url = "https://fcm.googleapis.com/fcm/send";

                $title = "";
                $body = "";
                //$notification = array('title' => $title, 'body' => null, 'sound' => 'default', 'badge' => '1');
                $arrayToSend = array('to' => $tokenID, 'priority' => 'high', 'data' => $cmMessage);
                $json = json_encode($arrayToSend);
                $headers = array();
                $headers[] = 'Content-Type: application/json';
                $headers[] = 'Authorization: key=' . $serverKey;
                $ch = curl_init();
                curl_setopt($ch, CURLOPT_URL, $url);
                curl_setopt($ch, CURLOPT_CUSTOMREQUEST, "POST");
                curl_setopt($ch, CURLOPT_POSTFIELDS, $json);
                curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
                curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 0);
                curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, 0);
                //Send the request
                $response = curl_exec($ch);
                //Close request
                if ($response === FALSE) {
                    die('FCM Send Error: ' . curl_error($ch));
                }
                curl_close($ch);

Get your server key and token id to send write them... Dont use notification tag...Like I did in code... Cuz if you write notification tag, Application in background is not got receive msg Cuz notification tag executes on foreground and in background automatic notification is displayed..

Send firebase push notification via php to android, ios

    function sendPushNotification($to = '', $data = array()){
    
        $api_key = '';
        $fields = array('to' => $to, 'notification' => $data);
    
        $headers = array(
            'Content-Type:application/json',
            'Authorization:key='.$api_key
        );
        $url = 'https://fcm.googleapis.com/fcm/send';
    
        $ch = curl_init();
        curl_setopt($ch, CURLOPT_URL, $url);
        curl_setopt($ch, CURLOPT_POST, true);
        curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
    
        curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
        curl_setopt($ch, CURLOPT_POSTFIELDS, json_encode($fields));
        $result = curl_exec($ch);
        if ($result === FALSE) {
            die('FCM Send Error: ' . curl_error($ch));
        }
        curl_close($ch);
        return $result;
    }
    
    
    
    
    $to = ''; //Device token 
    // You can get it from FirebaseInstanceId.getInstance().getToken();
    $message = array(
    'title' => 'Hai',
    'body' => 'New Message');
    
    echo sendPushNotification($to, $message);