Smarty HTML Escape doesnt work

Question

I try to escape the variable output to escape HTML in an XML Export. I dont know what i'm doing wrong. The Export is used in xt:commerce 5 online shop.

Smarty should be v. 3.1

Template :

<?xml version="1.0" encoding="UTF-8" ?>
<orders>
    {assign var=foo value='<b>baaa& ü ä ß ö <> aaa</b>'}{$foo|escape:'htmlall'}
</orders>

Output

<?xml version="1.0" encoding="UTF-8" ?>
<orders>
    <b>baaa& ü ä ß ö <> aaa</b>
</orders>

Answer 1

Escaping html makes sure your browser does not use the content as html, for example if you remove the escape then the text will be bold. To actually remove the tags from the string, you must use strip_tags ( https://www.smarty.net/docs/en/language.modifier.strip.tags.tpl ):

<?xml version="1.0" encoding="UTF-8" ?>
<orders>
    {assign var=foo value='<b>baaa& ü ä ß ö <> aaa</b>'}{$foo|strip_tags:}
</orders>

Output:

<xml version="1.0" encoding="UTF-8" ?="">
<orders>
     baaa&amp; ü ä ß ö   aaa 
</orders>

Answer 2

to escape an html tag in smarty you should use strip_tags