Hello,
I want to make a search somewhat similar to what Google does.Is that possible in PHP to some extend... Can anybody please help me...

Of course you can!

You just need to come up with formulas for recognizing the importance of pages vs. other pages promising similar information, you need to write a crawler, you need extensive processing and data storage resources, you need to write the information to parse the information in these databases, and present them in a timely matter.

Not really a big deal at all! Google parses a measly 20 petabytes a day (or at least in 2008 according to this: http://techcrunch.com/2008/01/09/goo...y-and-growing/). Obviously that's about 20,000 of the typical "large" hard drives these days :)