symfony2 twig whitelist html tags

Question

I pass a variable to my twig template in Symfony2, this variable may contain
html tags, I have tried to create an extension (function), but the variabl

Answer 1

{{ var|striptags('
')|raw }} 

works fine, but I don't know how to pass an array to the strip_tags php function with this twig filter.

both

{{ var|striptags(['
', ''])|raw }}

and

{% set allow = ['
', ''] %}
{{ var|striptags(allow)|raw }}

throw an "Array to string conversion" exception during the rendering of a template.

Be also carefull that strip_tags php function doesn't escape html attribute like "onclick".