Prior to 8.5 the WebSearch was the only search control available. For versions 8.5 and up,the new templated SiteSearch controls should be used. See below for more information about those controls.
The SiteSearch controls allow control over how search inputs are accepted, what results are returned, and how the results are displayed. These functions are done using the SiteSearchInputView, SiteSearchController, and SiteSearchResultsView controls. When using 8.5 and above, these controls should be used in the place of the websearch server control. The WebSearch control while it returns results with Solr may not return search results as expected.