Simple PHP script showing how to send an Android push notification. Be sure to replace the API_ACCESS_KEY with a proper one from the Google API's Console page. To use the script, just call scriptName.php?id=THE_DEVICE_REGISTRATION_ID

androidPushNotification.php

<?php
// API access key from Google API's Console ( Server KEY )
define( 'API_ACCESS_KEY', 'SERVER-API-KEY' );
$registrationIds = array( "userToken", "user2Token" );

$nome_empresa = "Sheep Kebab";
$id_push = "1";
$id_empresa = "2";
$abrirPush = "1";
$payload = '{"id_push":'.$id_push.',"id_empresa":'.$id_empresa.', "abrir":' . $abrirPush . '}';

// prep the bundle
$msg = array
(
	'message' 	=> 'Tem uma mensagem para você',
	'title'		=> $nome_empresa,
	'payload'	=> $payload,
	'vibrate'	=> 1,
	'sound'		=> 1,
	'largeIcon'	=> 'large_icon',
	'smallIcon'	=> 'small_icon'
);
$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;