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<?phpinclude 'vendor/autoload.php';
 
 class EchoLogger extends \Psr\Log\AbstractLogger
 {
 public function log($level, $message, array $context = array())
 {
 echo sprintf('%s: %s'.PHP_EOL, $level, $message);
 }
 }
 
 $sender = new \WebPower\gcm\server\Sender('api key');
 $sender->setLogger(new EchoLogger());
 
 $message = \WebPower\gcm\server\Message::builder();
 $message->addData('message', 'Hoi');
 
 $result = $sender->singleSendNoRetry($message->build(), 'reg Id');
 
 echo $result;
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