some php questions

[susapra]

okay, in the past week i bought a book about php and mysql (php and mysql for dummies),

and it explains how to check information.

but it only tell's me how to don't accept full words. but what i want to know is how to check for parts of words.

for example: the word is: pineapple
the book tells me how to look for the whole word: pineapple.
but i want to be able to scearch for only the part: pine or apple.

can someone tell me how to do that?

[Endrju]

http://pl2.php.net/manual/en/function.strpos.php
http://pl2.php.net/manual/en/function.stripos.php

And something more advanced:
http://pl2.php.net/manual/en/function.preg-match.php