Victor,
It's very easy to use a PHP front-end with Nutch. Run Tomcat on the
same box as PHP. Then write a PHP search page that makes an HTTP call
to "http://localhost/opensearch" for the actual search operation.
Parse the resulting XML (RSS 2.0) with xml_parse_into_struct() and
display.
I'm using this setup on http://www.busytonight.com and it works great.
--Matt
http://www.nabble.com/Replace-Tomcat-and-JSP-with-PHP-in-Nutch-How-Hard-is-It--t515663.html#a1398738