diff --git a/include/class.variable.php b/include/class.variable.php
index da249610c2de7482cc09b6a4ee283334296a85ac..48c39095ebdbe022f324ce02847dbf36896b1e6f 100644
--- a/include/class.variable.php
+++ b/include/class.variable.php
@@ -329,6 +329,10 @@ class PlaceholderList
         }
         return new static(array_filter($items));
     }
+
+    function __toString() {
+        return $this->asVar();
+    }
 }
 
 /**