add to lcoal

mobile/signature.php

@@ -2,11 +2,13 @@
 
 Log::record("This is signatrue file.");
 
-echo "true";
 
 $signature = $_GET["signature"];
 $timestamp = $_GET["timestamp"];
 $nonce = $_GET["nonce"];
+$echostr = $_GET["echostr"];
+
+echo("{$echostr}");
 
 $token = 'stanleykinghelloworld';
 $tmpArr = array($token, $timestamp, $nonce);