how to make a search engine for website? [closed]

I want to have a search engine for my website, is any of these web search engines(like Google,yahoo,etc) provide a free service? Or I should do it by myself

Can you disable a website?

Open the browser and go to Tools (alt+x) > Internet Options. Now click the security tab and then click the red Restricted sites icon. Click the Sites button below the icon. Now in the pop-up, manually type the websites you want to block one-by-one.

Maybe Google Custom Search?

Zend_Search_Lucene is a fully implemented and fast PHP based fulltext search engine. You'll have to index your own data but it provides a great deal of flexibility and control (search content, type, associated data to return etc). There are also implementations in many other languages.

This is a better option if you are indexing products or documents, not if you want the content of your website to be searched à la Google.