Understanding Python from a PHP coder's perspective

[villascape at gmail.com]

Right after I sent my first post, I realized I did not include the following:

Per https://wiki.python.org/moin/PythonVsPhp, "The vast majority of Python Web applications are run in a separate process. This has some important implications."

>From a PHP background, guess I just don't understand the concept of "separate processes".  What does this mean, how is it implemented, and what are the "important implications"?