I think php is a mother language of web development!
You'll need access to a PHP server running PHP any version.You can install PHP on your own PC,using the information provided in appendix B. However as a beginner you may find it more convenient to use a PHP server administered by someone else.
https://steemit.com/coding/@gaottantacinque/rasmus-lerdorf-php-inventor-in-milan
Thanks :)