The Yahoo BOSS plugin makes it easy to create a search engine in your WordPress install. This plugin does not replace the default search.
You need to modify a few options for the plugin to work correctly.
Yahoo App ID: add your Yahoo BOSS application ID here. This option is required.
Results per Page: use to configure how many search results you want to show on each page. Default is 10.
Format: the format of the search results. This would be useful if you want to use with AJAX. Default is XML.
Domains to Search: add site urls here if you want to limit your search to certain sites (one per line).
Yahoo App ID can be overridden with a defined constant in wp-config.
There are some filters available to use.
pw_boss_title - applied to the title of the search engine in the search form. Filter function arguments: title.
pw_boss_button - applied to the button to initiate the search in the search form. Filter function arguments: button text.
pw_boss_stylesheet - applied to the search engine stylesheet to provide your own custom stylesheet. Filter function arguments: default stylesheet.
pw_boss_result_info - modify the result meta information (1-10 of 201321 results for WordPress)