HTTPClient: Implement handling of two-dimensional data arrays

inc/HTTPClient.php

@@ -808,8 +808,15 @@ class HTTPClient {
     function _postEncode($data){
         $url = '';
         foreach($data as $key => $val){
-            if($url) $url .= '&';
-            $url .= urlencode($key).'='.urlencode($val);
+            if (is_array($val)) {
+                foreach ($val as $k => $v) {
+                    if($url) $url .= '&';
+                    $url .= urlencode($key).'['.$k.']='.urlencode($v);
+                }
+            } else {
+                if($url) $url .= '&';
+                $url .= urlencode($key).'='.urlencode($val);
+            }
         }
         return $url;
     }