Search Unleashed extends the standard WordPress search with customisable search engines, including MySQL’s full text and Zend’s Lucene, as well as word highlighting and the ability to search across posts, pages, comments, titles, URLs, and meta-data. The plugin also ensures that a search is performed against what a web browser sees, not what is contained within the database. For example, a lot of plugins will insert data into posts using shortcodes. Because this data is inserted run-time it is not included in any search results – the data is invisible.