diff --git a/formats/AtomFormat.php b/formats/AtomFormat.php
index 06ef8eb..7ec7d50 100644
--- a/formats/AtomFormat.php
+++ b/formats/AtomFormat.php
@@ -23,11 +23,11 @@ class AtomFormat extends FormatAbstract{
 
         $entries = '';
         foreach($this->getDatas() as $data){
-            $entryAuthor = is_null($data->author) ? '' : $this->xml_encode($data->author);
-            $entryTitle = is_null($data->title) ? '' : $this->xml_encode($data->title);
-            $entryUri = is_null($data->uri) ? '' : $this->xml_encode($data->uri);
-            $entryTimestamp = is_null($data->timestamp) ? '' : $this->xml_encode(date(DATE_ATOM, $data->timestamp));
-            $entryContent = is_null($data->content) ? '' : $this->xml_encode($this->sanitizeHtml($data->content));
+            $entryAuthor = is_null($data['author']) ? '' : $this->xml_encode($data['author']);
+            $entryTitle = is_null($data['title']) ? '' : $this->xml_encode($data['title']);
+            $entryUri = is_null($data['uri']) ? '' : $this->xml_encode($data['uri']);
+            $entryTimestamp = is_null($data['timestamp']) ? '' : $this->xml_encode(date(DATE_ATOM, $data['timestamp']));
+            $entryContent = is_null($data['content']) ? '' : $this->xml_encode($this->sanitizeHtml($data['content']));
             $entries .= <<<EOD
 
     <entry>
diff --git a/formats/HtmlFormat.php b/formats/HtmlFormat.php
index 19b7702..211a137 100644
--- a/formats/HtmlFormat.php
+++ b/formats/HtmlFormat.php
@@ -17,11 +17,11 @@ class HtmlFormat extends FormatAbstract{
 
         $entries = '';
         foreach($this->getDatas() as $data){
-            $entryAuthor = is_null($data->author) ? '' : '<br /><p class="author">by: ' . $data->author . '</p>';
-            $entryTitle = is_null($data->title) ? '' : $this->sanitizeHtml(strip_tags($data->title));
-            $entryUri = is_null($data->uri) ? $uri : $data->uri;
-            $entryTimestamp = is_null($data->timestamp) ? '' : '<time datetime="' . date(DATE_ATOM, $data->timestamp) . '">' . date(DATE_ATOM, $data->timestamp) . '</time>';
-            $entryContent = is_null($data->content) ? '' : '<div class="content">' . $this->sanitizeHtml($data->content). '</div>';
+            $entryAuthor = isset($data['author']) ? '<br /><p class="author">by: ' . $data['author'] . '</p>' : '';
+            $entryTitle = isset($data['title']) ? $this->sanitizeHtml(strip_tags($data['title'])) : '';
+            $entryUri = isset($data['uri']) ? $data['uri'] : $uri;
+            $entryTimestamp = isset($data['timestamp']) ? '<time datetime="' . date(DATE_ATOM, $data['timestamp']) . '">' . date(DATE_ATOM, $data['timestamp']) . '</time>' : '';
+            $entryContent = isset($data['content']) ? '<div class="content">' . $this->sanitizeHtml($data['content']). '</div>' : '';
             $entries .= <<<EOD
 
 <section class="feeditem">
diff --git a/formats/MrssFormat.php b/formats/MrssFormat.php
index 46012e9..7d939f3 100644
--- a/formats/MrssFormat.php
+++ b/formats/MrssFormat.php
@@ -21,11 +21,11 @@ class MrssFormat extends FormatAbstract{
 
         $items = '';
         foreach($this->getDatas() as $data){
-            $itemAuthor = is_null($data->author) ? '' : $this->xml_encode($data->author);
-            $itemTitle = strip_tags(is_null($data->title) ? '' : $this->xml_encode($data->title));
-            $itemUri = is_null($data->uri) ? '' : $this->xml_encode($data->uri);
-            $itemTimestamp = is_null($data->timestamp) ? '' : $this->xml_encode(date(DATE_RFC2822, $data->timestamp));
-            $itemContent = is_null($data->content) ? '' : $this->xml_encode($this->sanitizeHtml($data->content));
+            $itemAuthor = is_null($data['author']) ? '' : $this->xml_encode($data['author']);
+            $itemTitle = strip_tags(is_null($data['title']) ? '' : $this->xml_encode($data['title']));
+            $itemUri = is_null($data['uri']) ? '' : $this->xml_encode($data['uri']);
+            $itemTimestamp = is_null($data['timestamp']) ? '' : $this->xml_encode(date(DATE_RFC2822, $data['timestamp']));
+            $itemContent = is_null($data['content']) ? '' : $this->xml_encode($this->sanitizeHtml($data['content']));
             $items .= <<<EOD
 
     <item>