Symfony Ivory CkEditor protect twig syntax protectedSource

config.yml

ivory_ck_editor:
  configs:
    default:
      # ...
      # protect twig syntax
      entities: false
      protectedSource: ["/\{\{[\s\S]*?\}\}/g",  "/\{\%%[\s\S]*?\%%\}/g", "/\{\#[\s\S]*?\#\}/g"]
      # @see http://ckeditor.com/addon/showprotected for a plugin with a visual indicator / editor of protected source if needed

Thanks for the tip !

Just one thing : each protected source marker should be wrapped with simple quotes, at least with symfony 3.4.6 :)
And I personnaly removed the {{ }} tags from the protectedSource config to let those parameters in the content area for end users

ivory_ck_editor:
 configs:
   default:
     # ...
     # protect twig syntax
     protectedSource: ['/\{\%%[\s\S]*?\%%\}/g', '/\{\#[\s\S]*?\#\}/g']