fixes for internal mxisd endpoints

internal/identity_single.php

@@ -1,9 +1,12 @@
 <?php
 require_once("../database.php");
-$response = array();
+$response = new stdClass;
 try {
     $inputJSON = file_get_contents('php://input');
     $input = json_decode($inputJSON, TRUE);
+    if (empty($input)) {
+	    throw new Exception('no valid json as input present');
+    }
     if (!isset($input["lookup"])) {
         throw new Exception('"lookup" is not defined');
     }
@@ -40,4 +43,4 @@ try {
     $response["error"] = $e->getMessage();
 }
 print (json_encode($response, JSON_PRETTY_PRINT) . "\n");
-?>
+?>