Added bitstamp example

Author: Darkflib

examples/bitstamp-async.php

@@ -0,0 +1,27 @@
+<?php
+
+use ApiClients\Client\Pusher\Event;
+use React\EventLoop\Factory;
+use Rx\Observer\CallbackObserver;
+use ApiClients\Client\Pusher\AsyncClient;
+
+require dirname(__DIR__) . DIRECTORY_SEPARATOR . 'vendor/autoload.php';
+
+$loop = Factory::create();
+
+/**
+ * The App ID isn't a secret and comes from the bitstamp docs:
+ * @link https://www.bitstamp.net/websocket/
+ */
+$client = new AsyncClient($loop, 'de504dc5763aeef9ff52');
+
+$channelitems = array('live_trades','live_trades_xrpusd');
+foreach ($channelitems as $channelitem) {
+    $client->channel($channelitem)->subscribe(new CallbackObserver(function (Event $event) {
+        echo 'Channel: '. $event->getChannel(). PHP_EOL;
+        echo 'Event: '. $event->getEvent(). PHP_EOL;
+        echo 'Data: '. print_r($event->getData(),1). PHP_EOL;
+    }));
+}
+
+$loop->run();