RSS Feed/News strpos in templates

[ENXF NET]

I've been searching but I don't see anything about strpos. What would be the equivalent in a template?

Basically, I want to do this:
Code:

<xf:if is="strpos({$xf.uri}, 'forums') !== false">
    forums
<xf:else />
    {$xf.uri}
</xf:if>

because I just need to see if the URL contains certain words so I can do an if/else.

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