How to send push notifications to multiple devices using php script using FCM?

Question

I'm new to push notifications using FCM from php to Android devices. From android side I have generated FCM reg_id & send it over php script & store into mysql database. Now, I would like to send notifications from php script to multiple android devices simultaneously.

Here is the php scripts that are used during sending push notifications :

1.firebase.php ( reference link )

 <?php

class Firebase {

// sending push message to single user by firebase reg id
public function send($to, $message) {
    $fields = array(
        'to' => $to,
        'data' => $message,
    );
    return $this->sendPushNotification($fields);
}

// sending push message to multiple users by firebase registration ids
public function sendMultiple($registration_ids, $message) {
    $fields = array(
        'registration_ids' => $registration_ids,
        'data' => $message,
    );

    return $this->sendPushNotification($fields);
}

// function makes curl request to firebase servers
private function sendPushNotification($fields) {
    
    require_once('config.php');

    // Set POST variables
    $url = 'https://fcm.googleapis.com/fcm/send';

    $headers = array(
        'Authorization: key=' . FIREBASE_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($ch, CURLOPT_POST, true);
    curl_setopt($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 post
    $result = curl_exec($ch);
    // echo "Result".$result;
    if ($result === FALSE) {
        die('Curl failed: ' . curl_error($ch));
    }

    // Close connection
    curl_close($ch);

    return $result;
   }
 }

?>

2.push.php : ( reference link )

<?php

class Push {

// push message title
private $title;
private $message;
private $image;
// push message payload
private $data;
// flag indicating whether to show the push
// notification or not
// this flag will be useful when perform some opertation
// in background when push is recevied
private $is_background;

function __construct() {
    
}

public function setTitle($title) {
    $this->title = $title;
}

public function setMessage($message) {
    $this->message = $message;
}

public function setImage($imageUrl) {
    $this->image = $imageUrl;
}

public function setPayload($data) {
    $this->data = $data;
}

public function setIsBackground($is_background) {
    $this->is_background = $is_background;
}

public function getPush() {
    $res = array();
    $res['data']['title'] = $this->title;
    $res['data']['is_background'] = $this->is_background;
    $res['data']['message'] = $this->message;
    $res['data']['timestamp'] = date('Y-m-d G:i:s');
    return $res;
}

}

3.test.php

 <?php
include_once('config.php');
require_once('DB_Functions.php');
require_once('firebase.php');
require_once('push.php');



$db = new DB_Functions();
$firebase = new Firebase();
$push = new Push();

if(isset($_POST['send']))
{
    // $sendvalue = $_POST['send'];
        ChromePhp::log('send it '.$_POST['send']." user 
category:".$_POST['user_category']." Title : ".$_POST['message_title']." Message : ".$_POST['message_to_send']);

        $ucategory = $_POST['user_category'];
        ChromePhp::log('U category '.$ucategory);

        // notification title
        $messageTitle = isset($_POST['message_title']) ? $_POST['message_title'] : '';
        
        // notification message
        $messageToSend = isset($_POST['message_to_send']) ? $_POST['message_to_send'] : '';
        ChromePhp::log('Message Title '.$messageTitle." Message:".$messageToSend);

        $userslist_with_fcm_id = $db->getUsersFCMId($ucategory);
        ChromePhp::log('FCM LIST  '.$userslist_with_fcm_id->num_rows);
        // var_dump($userslist_with_fcm_id);


        $push->setTitle($messageTitle);
        $push->setMessage($messageToSend);

        $push->setIsBackground(FALSE);

        $json = '';
        $response = '';

        if ($userslist_with_fcm_id->num_rows > 0) {
             while ($row = mysqli_fetch_array($userslist_with_fcm_id)){
             
             ChromePhp::log('FCM ID  '.$row['fcm_id']);
             
             $json = $push->getPush();
             
             $regId = $row['fcm_id'];
             $response = $firebase->send($regId, $json);
                                            }
                                        }
                                  
       else{
              echo '<h3>Oops ! You got empty data</h3>';
           }
        var_dump($response);       
}
    
?>


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        body{
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            width: 1000px;
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        legend{
            font-size: 30px;
            color: #555;
        }
        .btn_send{
            background: #00bcd4;
        }
        label{
            margin:10px 0px !important;
        }
        textarea{
            resize: none !important;
        }
        .fl_window{
            width: 400px;
            position: absolute;
            right: 0;
            top:100px;
        }
        pre, code {
            padding:10px 0px;
            box-sizing:border-box;
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            white-space: pre-wrap;  
            white-space: -moz-pre-wrap; 
            white-space: -pre-wrap; 
            white-space: -o-pre-wrap; 
            word-wrap: break-word; 
            width:100%; overflow-x:auto;
        }

    </style>

    <script type="text/javascript">



    function sendMessage()
    {
        // alert("method called");
        var chx = document.getElementsByTagName('input');

        for (var i=0; i<chx.length; i++) 
        {
                // If you have more than one radio group, also check the name attribute
                // for the one you want as in && chx[i].name == 'choose'
                // Return true from the function on first match of a checked item
                if (chx[i].type == 'radio' && chx[i].checked) 
                {
                    // alert("checked: "+chx[i].value);
                    $.ajax({
                            url: 'test.php',
                            type: 'post',
                            data: {
                                send:"true",
                                user_category :chx[i].value,
                                message_title : document.getElementById('title').value,
                                message_to_send : document.getElementById('message').value
                                  },
                            success: function(data, textStatus, jqXHR)
                                {
                                    //data - response from server
                                    // alert("success  :".textStatus);
                                },
                                error: function (jqXHR, textStatus, errorThrown)
                                {
                                    // alert("failed :".textStatus);
                                }   
                        });
                        
                }
    
        
    }
}
</script>

  </head>
  <body>
    <div class="header">
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           <div class="col-md-5">
              <!-- Logo -->
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                 <h1><a href="index.php">Admin Panel</a></h1>
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                  <nav class="collapse navbar-collapse bs-navbar-collapse navbar-right" role="navigation">
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                      <li class="dropdown">
                        <a href="#" class="dropdown-toggle" data-toggle="dropdown">My Account <b class="caret"></b></a>
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                        <div class="panel-body">
                                
                 
                            <form class="pure-form pure-form-stacked" method="POST">
                                <fieldset>
                                    <legend>Create Message</legend>
    
                                    <label for="title">Title</label>
                                    <input type="text" value="Support Halt" id="title" name="title" class="pure-input-1-2" placeholder="Enter title">
                 
                                    <label for="message">Message</label>
                                    <textarea class="pure-input-1-2" name="message" id="message" placeholder="Notification message!" rows="5" >Hello World</textarea>
                                    
                                    <br>
                                       <h5> 
                                        <input type="radio" id="user_category" name="user_category" value="userswithopponents"> Users with opponents<br>
                                        <br>
                                        <input type="radio" id="user_category" name="user_category" value="userswithsupporters"> Users with supporters<br>
                                        <br>
                                        <input type="radio" id="user_category" name="user_category" value="everyone"> Everyone <br>                                            
                                        <br>
                                        <input type="radio" id="user_category" name="user_category" value="nyresidentsonly"> NY residents only </h5>

                                </br>
                 
                                   
                                    <input type="hidden" name="push_type" value="individual"/>
                                    <button type="submit" class="btn btn-primary" onclick="sendMessage()">Send</button>
                                </fieldset>
                            </form>
                        </div>

                    </div>
                </div>
            </div>
      </div>


    </div>
</div>



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So, as of now I have tried to iterate over all reg_ids from database & call send method but it didn't send notifications to any devices .

Answer 1

Try to send device ID of multiple devices as an array. In your case,

$registration_ids must be an array of device IDs.

Eg

$registration_ids = array('Device ID 1', 'Device ID 2');

Answer 2

If you were to send notification via terminal the data part of the curl command would look like this:

{
"registration_ids": ["device_token_1", "device_token_2"],
"notification": {
    "body": "Hello",
    "title": "Hello",
    "vibrate": 1,
    "sound": 1
 }
}

PHP code:

$body = array(
        'registration_ids' => array("device_token_1", "device_token_2"),
        'notification' => array('body' => 'Hello', 'title' => 'Hello', 'vibrate' => 1, 'sound' => 1)
    );

Answer 3

$notification_data = $this->common->get_all_record('table name',array()); //get all id from table

            if($notification_data != NULL){
                foreach ($notification_data as $notification_data_row) {
                    $registrationIds = $notification_data_row['token'];
                #prep the bundle
                    $msg = array
                        (
                        'body'  => 'body msg',
                        'title' => 'title',
                        'icon'  => 'myicon',/*Default Icon*/
                        'sound' => 'mySound'/*Default sound*/
                        );
                    $fields = array
                        (
                        'to'            => $registrationIds,
                        'notification'  => $msg
                        );
                    $headers = array
                        (
                        'Authorization: key=' . "your key",
                        'Content-Type: application/json'
                        );
                #Send Reponse To FireBase Server
                    $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, false );
                    curl_setopt( $ch,CURLOPT_POSTFIELDS, json_encode( $fields ) );

                    $result = curl_exec ( $ch );
                    // echo "<pre>";print_r($result);exit;
                    curl_close ( $ch );
                }
            }

Answer 4

To send firebase notifications to multiple users at once

add multiple firebase tokens to an array.

$token_ids = array('token1', 'token2');

Pass the tokens to the below shown function

Using below shown function you can also send images with your notification

if you don't want to send any image then just pass empty string

sendFirebaseNotification($token_ids ,"notification title", "message", "image_url");

I use this function

function sendFirebaseNotification($fb_key_array, $title, $message, $imageURL){
    $authorization_key = "your_auth_key";

    $finalPostArray = array('registration_ids' => $fb_key_array,
                            'notification' => array('body' => $message,
                                                    'title' => $title,
                                                    "image"=> $imageURL),
                            "data"=> array("click_action"=> "FLUTTER_NOTIFICATION_CLICK",
                                            "sound"=> "default", 
                                            "status"=> "done")); 
    
    $ch = curl_init();
    curl_setopt($ch, CURLOPT_URL,"https://fcm.googleapis.com/fcm/send");
    curl_setopt($ch, CURLOPT_POST, 1);
    curl_setopt($ch, CURLOPT_POSTFIELDS,json_encode($finalPostArray));  //Post Fields
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
    curl_setopt($ch, CURLOPT_HTTPHEADER, array('Content-Type: application/json', 'Authorization: key='.$authorization_key));
    $server_output = curl_exec ($ch);
    curl_close ($ch);
    //echo $server_output; 
}

Answer 5

Use 'registrations_ids' in place of 'to', if you want to send to the multiple users like:

$fields = array
(
    'registration_ids'  => $tokens,
    'notification'   => $msg


);

where $tokens = array("device token 1" , "device token 2");

if you want to send to the single user use 'to' , like

$fields = array
(
    'to'  => $token,
    'notification'   => $msg


);

where $token = "device token 1";

Answer 6

Below is the simple script to send notification. Try this.

<?php 
$tokens = array('token_1','token_2','token_3');
$title = "Title Here";
$msg = "Subtitle or description Here";
//Custom Parameters if any
$customParam = array(
   'redirection_id' => '2',
   'redirection_type' => 'post_page' //'post_page','category_page','blog_page'
);
push_notification_android($tokens,$title,$msg,$customParam);
function push_notification_android($tokens,$title,$msg,$customParam) {
$url = 'https://fcm.googleapis.com/fcm/send';
$api_key = 'fcm_server_api_key';
$messageArray = array();
$messageArray["notification"] = array (
    'title' => $title,
    'message' => $msg,
    'customParam' => $customParam,
);
$fields = array(
    'registration_ids' => $tokens,
    'data' => $messageArray,
);
$headers = array(
    'Authorization: key=' . $api_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_POST, true);
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 post
$result = curl_exec($ch);
if ($result === FALSE) {
    echo 'Android: Curl failed: ' . curl_error($ch);
}
// Close connection
curl_close($ch);
return $result;
}
?>