Example of GCM-Server in PHP

sendPushToGCMServer.php

<?php
    // API access key from Google API's Console
    // It's a Server-Key
    define( 'API_ACCESS_KEY', 'YOUR_API_ACCESS_KEY' );
    
    $registrationIds = array("DEVICE_REGISTRATION_IDS" );
    
    // prep the bundle
    $msg = array
    (
        'message'       => 'here is a message. message',
        'title'         => 'This is a title. title',
        'subtitle'      => 'This is a subtitle. subtitle',
        'tickerText'    => 'Ticker text here...Ticker text here...Ticker text here',
        'vibrate'   => 1,
        'sound'     => 1
    );
    
    $fields = array
    (
        'registration_ids'  => $registrationIds,
        'data'              => $msg
    );
    
    $headers = array
    (
        'Authorization: key=' . API_ACCESS_KEY,
        'Content-Type: application/json'
    );
    
    $ch = curl_init();
    curl_setopt( $ch,CURLOPT_URL, 'https://android.googleapis.com/gcm/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 );
    curl_close( $ch );
    
    echo $result;
?>