Can I design Web pages with Delphi?

For Delphi Web Development you have :

1 - Unigui unigui (Server side Tecnology and client side using Sencha Framworke
2 - Intraweb atozed
3 - Tms WebCore - cliente Side javascript Tms sofware Webcore
4- Elevate Builder -Elevate Software
5 - Smart mobile Studio - Smart Mobile Studio

For Mvc and Rest you have
6- Mars curiosity - MARS-Curiosity Delphi REST Library
7- Delphi Mvc framework - Mcv Framework
8- Mormot (fantastic ORM and REST and other stuff ) - Mormot

and there's more out there. So as you can see, Delphi is not dead, Delphi is algo great for web development.

Delphi for PHP

For small applications you may use IntraWeb