push-gcm.php

<?php

include_once './config.php';
class GCM {
 
    //put your code here
    // constructor
    function __construct() {
         
    }
 
    /**
     * Sending Push Notification
     */
    public function send_notification($registatoin_ids) {
        // include config        
 
        // Set POST variables
        $url = 'https://android.googleapis.com/gcm/send';
 
        $fields = array(
            'registration_ids' => $registatoin_ids,
            'data' => ['alertBody' => "fbody","alertTitle" =>"title","key" =>"value" ]
        );
 
        $headers = array(
            'Authorization: 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 ($result === FALSE) {
            die('Curl failed: ' . curl_error($ch));
        }
 
        // Close connection
        curl_close($ch);
        echo "Request: <br><br>".json_encode($fields)."<br><br>Response: <br><br>".$result;
    }
 
}

$gcm = new GCM(); 
$registatoin_ids = array(REG_ID);
$result = $gcm->send_notification($registatoin_ids);

echo $result;

?>