Finding which shape polygon a point is in with mapscript

[Camden Daily]

Eric, $layer->open() doesn't seem to like taking any arguments.  The
documentation doesn't list it as being able to take any arguments
either.  Is that a perl only ability?

Calling layer->open() without arguments in other parts of my script
works just fine; it just fails in this instance.

I'll let you know if I find any success with queryByPoint().