fixed doc

git-svn-id: http://svn.twig-project.org/trunk@181 93ef8e89-cb99-4229-a87c-7fa0fa45744b

diff --git a/doc/04-Extending-Twig.markdown b/doc/04-Extending-Twig.markdown
index 5c91c28..7bc1ee6 100644 (file)
--- a/doc/04-Extending-Twig.markdown
+++ b/doc/04-Extending-Twig.markdown
@@ -90,6 +90,7 @@ A filter is defined as a sub-class of the `Twig_Filter` class. The
 `Twig_Filter_Function` class can be used to define a filter implemented as a
 function:
 
+    [php]
     $filter = new Twig_Filter_Function('str_rot13');
 
 The first argument is the name of the function to call, here `str_rot13`, a