PHP

PHP is a moderne and very powerful language for building dynamic web pages and even entire Web Applications. Such files are hosted on a Web Server, of course.

And in many cases these dynamic Webpages have to take some actions on client side, too!

To realise that, you typically can use JavaScript – a genious partner to PHP!

The Book I read: Einsteigen und durchstarten mit PHP 5, written by
Hakan Küçükyilmaz/ Thomas M. Haas/ Alexander Merz, ISBN 3-89864-236-4.

It is a very good and detailed book that I actually can recommend to you!