So I'm wrapping up a web programming project in PHP/MySQL when my professor comes to me and tells me that I need to have some sort of "external" form testing for all input being sent to my scripts. I'm assuming she means something similar to JUnit as seen in Java. I have like 4 days to do this, but I have no clue where to start. I've looked at PHPUnit as well as PHPSimpleTest, but it appears these are more for hardcore programming projects, not simple testing for invalid characters, null, etc in HTML forms. Any advice?