[ Posted by Ayush ] This is php code to test android push notifications (GCM) online. Just replace API key and device ids. It will send a notification with key "alert".

fiddle_090817.php

<?php


// API access key from Google API's Console
define( 'API_ACCESS_KEY', 'AIzaSyDD5cwKE6O252bVA766Lyo2cQhG7RbShWA' );


$registrationIds = array("erKXJiDIdiY:APA91bE3N0Bfh6e7tpIT2qcHBD_vqg6ObMQHyrbXEAf6MQqeHcGSauArLzoQRvWb7VpHY_hReEdfw3WxU5Ybk95dWnGT2KAQmC9cHAajuDQx5kJu1Ic2QJKuu3vYNtuRAo6edfuMrbJj" );

// prep the bundle
$msg = array
(
    'alert'       => 'here is a message. message',
  
);

$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://gcm-http.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;
?>