PHP Thread Safe and Non-Thread Safe for Windows

Question

I am downloading PHP for Windows. I got 2 options on the website.

1. PHP Thread Safe
2. PHP Non-Thread Safe

Please answer the following questions

Answer 1

In addition to Crack, since 5.4 you can use built-in web server (it works nice!).

Warning This web server was designed to aid application development. It may also be useful for testing purposes or for application demonstrations that are run in controlled environments. It is not intended to be a full-featured web server. It should not be used on a public network.