Is it possible to make the search page the home page?
so that the visitors of the website end up on the search page.

@epsilon
You can put redirect here or try to put search.php content into main.php (or use simply inlcude).
There could be minor issues as home page will not be considered as "search page" by osclass... function osc_is_search_page() would be false.

i will try it thanks