Best way to sanitize / filter user input?

[RPicard]

One of the best things you can do is to create your own function to quick sanitize input. This will allow you a greater degree of control and options plus you can upgrade and alter your sanitize function which will work across your whole site.

Look into this too:
http://us2.php.net/manual/en/ref.filter.php

That's only php 5 compatible but it looks great. Lots of options to filter input.

Pretty cool stuff: http://us2.php.net/manual/en/filter.filt...nitize.php

That's a good idea. Thanks.