I have been asked to include some html snippet in this php/smarty page. It\'s basically a sales agreement at the end of an overview page before you pay.
What is the
Do you mean include a file containing static HTML?
{include file="htmlfile.html"}
edit
As the file is just HTML, it might be better to use {fetch}, e.g.
{fetch file="path/to/html/file.html"}
For local files, either a full system file path must be given, or a path relative to the executed php script.