Answer 1

PHP is an interpreted server-side Web scripting language. It provides session tracking, database access, file manipulation, etc... as built-in features. Python is a combination compiled and interpreted language similar to Java. It can be used stand alone through a command console on your system or the console that is distributed with the windows versions. Python can be used as a processor for form data from websites but it's best used for one time processing and not user tracking throughout a session. Though there are some exceptions depending on the type of platform and the code you create. Ruby is one that I am not familiar with first hand. I suggest doing the ruby tutorial.