add php example

lib/www/example.php

@@ -0,0 +1,17 @@
+<?php
+
+require_once 'jsonRPCClient.php';
+$electrum = new jsonRPCClient('http://localhost:7777');
+
+echo '<b>Wallet balance</b><br />'."\n";
+try {
+
+    $balance = $electrum->getbalance();
+    echo 'confirmed: <i>'.$balance['confirmed'].'</i><br />'."\n";
+    echo 'unconfirmed: <i>'.$balance['unconfirmed'].'</i><br />'."\n";
+
+} catch (Exception $e) {
+    echo nl2br($e->getMessage()).'<br />'."\n";
+}
+
+?>