Knowledge base contains information on how to use Relevanssi. There are lots of features that are documented in the knowledge base. Here's an index to the knowledge base, with all the entries sorted under different topics.
The user manual functions page is also a good place to look at.
Multisite search only works in Relevanssi Premium. Free Relevanssi can be installed in multisite environments, but it cannot search across sites. Relevanssi Premium can only support multisite searching across sites in the same multisite network. Relevanssi can’t search across multiple sites that are not in the same multisite installation. Cloud-based search tools can help you…
If you’re using category restriction dropdown on your search form, here’s a bit of code that you can add to your search results template to show how many hits were found and what the category is. If no category was selected, this’ll just show how many hits were found.
Relevanssi Premium can search user profiles. So far the following data gets indexed from user profiles: first name, last name, display name and description. If you’re interested in having something else indexed, there’s an option on the options page. Because WordPress only handles posts in the search result pages, Relevanssi must make WordPress believe it’s…
Relevanssi adds a shortcode to help making links to search results. That way users can easily find more information about a given subject from your blog. The syntax is simple: This will make the text John Doe a link to search results for John Doe. In case you want to link to some other search…
Relevanssi stores the relevance score it uses to sort results in the $post variable. Just add something like <?php echo “Score: $post->relevance_score”; ?> to your search results template to display the relevance score.
You can specify date limits on searches with by_date search parameter. Here’s a link you can add to your search results page to offer your visitor the ability to restrict the search results to last day: <?php echo ‘<p><a href=”‘ . get_bloginfo(‘url’) . ‘?s=’ . get_search_query() . ‘&by_date=1d”>results from the last day</a></p>’; ?> The date range is…
If you want something else than the default relevancy ranking, you can use orderby and order parameters for the search query. Orderby accepts $post variable attributes and order can be asc (ascending) or desc (descending). The most relevant attributes here are most likely post_date and comment_count. If you want to give your users the ability…
Relevanssi can’t be used in any situation, because it checks the presence of search with the is_search() function. This causes some unfortunate limitations and reduces the general usability of the plugin. You can, however, access the query engine directly. There’s a function called relevanssi_do_query(), which can be used to do search queries just about anywhere. Here’s a…
If you want to show the number of search results found on the search results template, you can find the value in the variable $wp_query->found_posts. Just add <?php echo ‘<p>Found ‘ . $wp_query->found_posts . ‘ hits.</p>’; ?> in your search results template. In case that produces no results, try introducing the global $wp_query variable like…