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I am following http://javapapers.com/android/google-cloud-messaging-gcm-for-android-and-push-notifications/? to send push notifications via GCM. Everything works fine but, i am able to send push notification to just one device. Registering another device replaces registration id of previous device. I tried solution provided by Shardool in http://javapapers.com/android/android-multicast-notification-using-google-cloud-messaging-gcm/? but its not working.
Any suggestion would be of great help.
Here are my gcm.php codes that registers device and sends push notifications but, only to a single device registered recently.
gcm.php
<?php
//generic php function to send GCM push notification
function sendPushNotificationToGCM($registatoin_ids, $message) {
//Google cloud messaging GCM-API url
$url = 'https://android.googleapis.com/gcm/send';
$fields = array(
'registration_ids' => $registatoin_ids,
'data' => $message,
);
// Google Cloud Messaging GCM API Key
define("GOOGLE_API_KEY", "MY_KEY");
$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_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_POSTFIELDS, json_encode($fields));
$result = curl_exec($ch);
if ($result === FALSE) {
die('Curl failed: ' . curl_error($ch));
}
curl_close($ch);
return $result;
}
?>
<?php
//this block is to post message to GCM on-click
$pushStatus = "";
if ( ! empty($_GET["push"])) {
$gcmRegID = file_get_contents("GCMRegId.txt");
$pushMessage = $_POST["message"];
if (isset($gcmRegID) && isset($pushMessage)) {
$gcmRegIds = array($gcmRegID);
$message = array("m" => $pushMessage);
$pushStatus = sendPushNotificationToGCM($gcmRegIds, $message);
}
}
//this block is to receive the GCM regId from external (mobile apps)
if ( ! empty($_GET["shareRegId"])) {
$gcmRegID = $_POST["regId"];
file_put_contents("GCMRegId.txt",$gcmRegID);
echo "Ok!";
exit;
}
?>
<html>
<head>
<title>Google Cloud Messaging (GCM) Server in PHP</title>
</head>
<body>
<h1>Google Cloud Messaging (GCM) Server in PHP</h1>
<form method="post" action="gcm.php/?push=1">
<div>
<textarea rows="2" name="message" cols="23" placeholder="Message to transmit via GCM"></textarea>
</div>
<div><input type="submit" value="Send Push Notification via GCM" /></div>
</form>
<p><h3><?php echo $pushStatus; ?></h3></p>
</body>
</html>
Please tell me how do I store multiple device registration ids in GCMRegid.txt and send notifications to each of the registered device
763
The first step in GCM is that a third-party server (such as an email server) sends a request to Google's GCM server. This server then sends the message to your device, through that open connection. The Android system looks at the message to determine which app it's for, and starts that app.
FCM is a cloud platform that provides messages and push notifications for operating systems- ios and Android, and websites as well. Google Cloud Messaging is a messaging service that enables the message transfer from server to clients apps.
The GCM server and client APIs are deprecated and will be removed as soon as May 29th, 2019. Google recommends upgrading to Firebase Cloud Messaging (FCM) sooner rather than later to begin taking advantage of the new features available in FCM.
Here I rewrote the php using mysql rather than retrieving the keys from file. In this case, I retrieve all the regIds from the table and put them in an array and pass it to sendPushNotification function to push the message to all. here you have 2 files, one for connect to database and one for GCM:
connect.php:
<?php
$db_host = "localhost";
$db_user = "root"; //change to your database username, it is root by default
$db_pass = ''; //change to your database password, for XAMPP it is nothing for WAMPP it is root
$db_db = 'gcmFirst'; //change to your database name
if(!@mysql_connect($db_host, $db_user, $db_pass) || !@mysql_select_db($db_db)) {
die('couldnt connect to database ' .mysql_error());
}
?>
gcm.php
<?php
require 'connect.php';
function sendPushNotification($registration_ids, $message) {
$url = 'https://android.googleapis.com/gcm/send';
$fields = array(
'registration_ids' => $registration_ids,
'data' => $message,
);
define('GOOGLE_API_KEY', 'AIzaSyCjctNK2valabAWL7rWUTcoRA-UAXI_3ro');
$headers = array(
'Authorization:key=' . GOOGLE_API_KEY,
'Content-Type: application/json'
);
echo json_encode($fields);
$ch = curl_init();
curl_setopt($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;
}
$pushStatus = '';
if(!empty($_GET['push'])) {
$query = "SELECT regId FROM users";
if($query_run = mysql_query($query)) {
$gcmRegIds = array();
while($query_row = mysql_fetch_assoc($query_run)) {
array_push($gcmRegIds, $query_row['regId']);
}
}
$pushMessage = $_POST['message'];
if(isset($gcmRegIds) && isset($pushMessage)) {
$message = array('message' => $pushMessage);
$pushStatus = sendPushNotification($gcmRegIds, $message);
}
}
if(!empty($_GET['shareRegId'])) {
$gcmRegId = $_POST['regId'];
$query = "INSERT INTO users VALUES ('', '$gcmRegId')";
if($query_run = mysql_query($query)) {
echo 'OK';
exit;
}
}
?>
<html>
<head>
<title>Google Cloud Messaging (GCM) Server in PHP</title>
</head>
<body>
<h1>Google Cloud Messaging (GCM) Server in PHP</h1>
<form method = 'POST' action = 'gcm.php/?push=1'>
<div>
<textarea rows = 2 name = "message" cols = 23 placeholder = 'Messages to Transmit via GCM'></textarea>
</div>
<div>
<input type = 'submit' value = 'Send Push Notification via GCM'>
</div>
<p><h3><?php echo $pushStatus ?></h3></p>
</form>
</body>
</html>
all you have to do is create a database that has a users table with id, regId and name as columns.
Hope this is what you are looking for
113
I have modified the above gcm.php a little to meet my needs:
gcm_main.php:
<?php
require 'connect.php'; //this is the same as as other answers on this topic
function sendPushNotification($registration_ids, $message) {
$url = 'https://android.googleapis.com/gcm/send';
$fields = array(
'registration_ids' => $registration_ids,
'data' => $message,
);
define('GOOGLE_API_KEY', 'your_google_api_key_here');
$headers = array(
'Authorization:key=' . GOOGLE_API_KEY,
'Content-Type: application/json'
);
echo json_encode($fields);
$ch = curl_init();
curl_setopt($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 $result;
}
function redirect($url)
{
if (!headers_sent())
{
header('Location: '.$url);
exit;
}
else
{
echo '<script type="text/javascript">';
echo 'window.location.href="'.$url.'";';
echo '</script>';
echo '<noscript>';
echo '<meta http-equiv="refresh" content="0;url='.$url.'" />';
echo '</noscript>'; exit;
}
}
$pushStatus = '';
if(!empty($_GET['push'])) {
$query = "SELECT gcm_regid FROM gcm_users";
if($query_run = mysql_query($query)) {
$gcmRegIds = array();
while($query_row = mysql_fetch_assoc($query_run)) {
array_push($gcmRegIds, $query_row['gcm_regid']);
}
}
$pushMessage = $_POST['message'];
if(isset($gcmRegIds) && isset($pushMessage)) {
$message = array('price' => $pushMessage);
$regIdChunk=array_chunk($gcmRegIds,1000);
foreach($regIdChunk as $RegId){
$pushStatus = sendPushNotification($RegId, $message);}
}
$url="url_to_this_php_file";
redirect($url);
}
if(!empty($_GET['shareRegId'])) {
$gcmRegId = $_POST['gcm_regid'];
$query = "INSERT INTO gcm_users VALUES ('', '$gcmRegId')";
if($query_run = mysql_query($query)) {
// echo 'OK';
exit;
}
}
?>
<html>
<head>
<title>Whatever Title</title>
</head>
<body>
<?php
include_once 'db_functions.php';
$db = new DB_Functions();
$users = $db->getAllUsers();
if ($users != false)
$no_of_users = mysql_num_rows($users);
else
$no_of_users = 0;
?>
<h1>Whatever you want</h1>
<h2>Whatever you want</h2>
<h3>Push Notification Admin Panel</h3>
<h4>Current Registered users: <?php echo $no_of_users; ?></h4>
<h4></h4>
<form method = 'POST' action = 'gcm_main.php/?push=1'>
<div>
<textarea rows = "3" name = "message" cols = "75" placeholder = "Type message here"></textarea>
</div>
<div>
<input type = "submit" value = "Send Notification">
</div>
</form>
</body>
</html>
db_connect.php:
<?php
class DB_Connect {
// constructor
function __construct() {
}
// destructor
function __destruct() {
// $this->close();
}
// Connecting to database
public function connect() {
require_once 'config.php';
// connecting to mysql
$con = mysql_connect(DB_HOST, DB_USER, DB_PASSWORD);
// selecting database
mysql_select_db(DB_DATABASE);
// return database handler
return $con;
}
// Closing database connection
public function close() {
mysql_close();
}
}
?>
db_functions.php:
<?php
class DB_Functions {
private $db;
//put your code here
// constructor
function __construct() {
include_once './db_connect.php';
// connecting to database
$this->db = new DB_Connect();
$this->db->connect();
}
// destructor
function __destruct() {
}
/**
* Storing new user
* returns user details
*/
public function storeUser($name, $email, $gcm_regid) {
// insert user into database
$result = mysql_query("INSERT INTO gcm_users(name, email, gcm_regid, created_at) VALUES('$name', '$email', '$gcm_regid', NOW())");
// check for successful store
if ($result) {
// get user details
$id = mysql_insert_id(); // last inserted id
$result = mysql_query("SELECT * FROM gcm_users WHERE id = $id") or die(mysql_error());
// return user details
if (mysql_num_rows($result) > 0) {
return mysql_fetch_array($result);
} else {
return false;
}
} else {
return false;
}
}
/**
* Get user by email and password
*/
public function getUserByEmail($email) {
$result = mysql_query("SELECT * FROM gcm_users WHERE email = '$email' LIMIT 1");
return $result;
}
/**
* Getting all users
*/
public function getAllUsers() {
$result = mysql_query("select * FROM gcm_users");
return $result;
}
/**
* Check user is existed or not
*/
public function isUserExisted($id) {
$result = mysql_query("SELECT gcm_regid from gcm_users WHERE gcm_regid = '$id'");
$no_of_rows = mysql_num_rows($result);
if ($no_of_rows > 0) {
// user existed
return true;
} else {
// user not existed
return false;
}
}
public function deleteUser($id){
$result=mysql_query("DELETE FROM gcm_users WHERE gcm_regid = '$id'");
}
}
?>
config.php:
<?php
/**
* Database config variables
*/
define("DB_HOST", "localhost");
define("DB_USER", "root");
define("DB_PASSWORD", "");
define("DB_DATABASE", "gcm");
/*
* Google API Key
*/
define("GOOGLE_API_KEY", "your_google_api_key_here"); // Place your Google API Key
?>
EDIT:
I have re-written the PHP code with some refinements and using MySqli (instead of MySql). It's in Github.
44
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