I don't think there is a good answer to this. "Better" is hard to define, I don't actually know Coldfusion but what I saw from it looked utterly weird. That doesn't mean it's a bad language, I heard that you can write very short code in Coldfusion.
Choosing between language's is mostly a matter of taste. If you really think PHP would be better suited confront the network guy and ask him why he choose Coldfusion. If he choose Coldfusion he will most likely know.