i have searched many more among blogs, forum and many off but not success in getting perfact tips how it is possible? if some body have good idea then please post it here soon. if i then will be posted soon. thanks
You will find most people will discuss exploiting search engines rather than building new ones. Universities often have experimental indexing systems. Most people who want to offer search simply reskin google or take the meta approach and combine the results of several engines. Are you using phpdig as the base of your indexer? Have you got funding for the significant server setup required to index the sites. You've posted in programming so do you a coding question?
Depending on the scope of what you want to accomplish this can either be very quick or impossible to complete. Set yourself some goals, define your problem in a way that will help other people understand it. Are you indexing 'the internet', blogs, articles, your own content? Any or all of these things could take your project in its own direction.