session_savesearch

The function saves the current search parameters and the first item position into the session, under keys specific to the given module. It retrieves the search parameters from the global `$_ufh` or `$ufh_serialized` variables, serializes them, and stores them in the session (`savedsearch_` and `savedfirst_` keys). The return value is the serialized parameter string, which can be used later to restore the search state.