There are a lot of differences between ASP and PHP.
Both ASP and PHP are languages used to build Dynamic Web sites that can interact with Databases and exchange information. ASP (Active Server Pages) is from Microsoft and is used with IIS (Internet Information Server) that runs on Microsoft Servers. PHP (Personal Home Pages) is from Rasmus Lerdorf, who originally designed this parsing language which was later modified by different people. It runs on Unix and Linux servers and it also has an NT server version.
They go through several topics comparing to two - things like cost, speed, and database connectivity. The information provided here isn't anything groundbreaking, and there's no real conclusive choice (despite their "choice" at the end) between the two. What it really boils down to is the old "right tool for the right job" kind of situation, really...
