PHP Search Engine is engine to use inside a web site or few web sites. Secured Simple Crawling System is available to submit URLs and Links to the system. Pages from submitted URL will automatically add to search database when admin adds a URL to the system. Once crawling is done the links with their contents (Plain text from web link) will be available to search. If the total web site is linked to it's home page, you need just give home page URL to the system only. You do not need to much work to implement a search system inside your web site.
Complete Installation guide is available with the package