After checking out the safe plants on this forum (usually your cheapest and safest bet to use those), you can also visit this site: Melissa Kaplan's Plants for Herps Resources
It has some good info itself, but also contains links to further sites where you can research the toxicity of those plants.
Off the top of my head, I think Philodendron was classified as possibly harmful to chams, and shouldn't be used in enclosures.