Search Result Navigation

Hello, I remember some time ago (I can't find the thread now) some discussion about making the navigational numbers at the bottom of a lot of search engines results pages fo example: Pages: 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | Next >> can anyone point me to an example of how to do this with php/mysql, I already know how to do the next and previous stuff using the LIMIT statment of mysql but need some thoughts on how to make the right numbers for the amount of results in the query. Any ideas would be appreciated, Regards Joseph