Automate Validation?

Hello all,

 

Is it possible to interface with w3's validator through some sort of an
API or something?  Or do you have to install your own validator on your
own server to get that to work?  

 

Basically, I am would like to write a PHP script that would
automatically run html files through a validator and report the results
back.  What is the easiest way to do this?

 

Thanks,

 

Nathan Scafe