diff --git a/lib/lib.php b/lib/lib.php
index 559bdfd..a685feb 100755
--- a/lib/lib.php
+++ b/lib/lib.php
@@ -3165,3 +3165,10 @@ function serviceProvider($alias, callable $resolver = null)
 
         return $res;
     }
+
+    function start_session()
+    {
+        if (!session_id()) {
+            session_start();
+        }
+    }