gistfile1.txt

diff --git a/symphony/lib/core/class.databasesessionhandler.php b/symphony/lib/core/class.databasesessionhandler.php
index 5a4d517..6d480a5 100644
--- a/symphony/lib/core/class.databasesessionhandler.php
+++ b/symphony/lib/core/class.databasesessionhandler.php
@@ -88,7 +88,7 @@ class DatabaseSessionHandler implements SessionHandlerInterface
             "DELETE
             FROM `tbl_sessions`
             WHERE `session` = '%s'",
-            $this->database->cleanValue($session_id)
+            $this->database->cleanValue($key)
         ));
     }
 
@@ -144,7 +144,7 @@ class DatabaseSessionHandler implements SessionHandlerInterface
                 FROM `tbl_sessions`
                 WHERE `session` = '%s'
                 LIMIT 1",
-                $this->database->cleanValue($session_id)
+                $this->database->cleanValue($key)
             )
         );
 
@@ -174,8 +174,9 @@ class DatabaseSessionHandler implements SessionHandlerInterface
     public function write($session_id, $session_data)
     {
         $key = $this->key($session_id);
+        $data = $this->read($session_id);
 
-        if (!isset($this->statuses[$key]) || (isset($this->statuses[$key]) && $this->statuses[$key] != md5($session_data))) {
+        if(!is_null($data) || $this->statuses[$key] !== md5($session_data)) {
             $data = array(
                 'session' => $key,
                 'session_expires' => time(),
diff --git a/symphony/lib/core/class.session.php b/symphony/lib/core/class.session.php
index 9636830..e916f59 100644
--- a/symphony/lib/core/class.session.php
+++ b/symphony/lib/core/class.session.php
@@ -50,11 +50,11 @@ class Session extends Container
             'session_cookie_httponly' => false
         ], $settings);
 
-        if (empty($this->settings['domain'])) {
-            $this->settings['domain'] = $this->getDomain();
+        if (empty($this->settings['session_cookie_domain'])) {
+            $this->settings['session_cookie_domain'] = $this->getDomain();
         }
 
-        $this->key = $key;
+        $this->key = $this->settings['session_name'];
     }
 
     /**
@@ -75,14 +75,7 @@ class Session extends Container
             }
 
             if (!is_null($this->handler)) {
-                session_set_save_handler(
-                    array($this->handler, 'open'),
-                    array($this->handler, 'close'),
-                    array($this->handler, 'read'),
-                    array($this->handler, 'write'),
-                    array($this->handler, 'destroy'),
-                    array($this->handler, 'gc')
-                );
+                session_set_save_handler($this->handler, true);
             }
 
             session_name($this->settings['session_name']);
@@ -189,10 +182,6 @@ class Session extends Container
      */
     public function offsetGet($key)
     {
-        if (!isset($this->keys[$key])) {
-            return null;
-        }
-
         return $this->store[$this->key][$key];
     }