Building a Related Records Function?

[eluser]mddd[/eluser]
Why don't you check the Mysql manual for LIKE.
In short : column_name LIKE '%php%' will find any string containing 'php'.

If you want more extensive searching you should check out MATCH. And if you want real 'related items' functionality, you'll have to build something yourself, by linking keywords to your items and looking for items that have the same keywords..