Recently I have been spending an unholy amount of time learning a new programming language and improve my existing knowledge with lots of practice. My eventual goal is to reach a stage with a single programming language where I won’t have to refer to the documentation as frequently as I currently do.
For you to be a decent web application developer, you need to have a good grasp of HTML, CSS (has frameworks), PHP, MySQL/MariaDB/Postgres/SQLite (or frameworks/language like PHP-Laravel, ruby on rails, Python/Django/flask – I don’t want to even list a large number of javascript framework or many alternatives of javascript for that matter (typescript, Dart) maybe even bootstrap or similar libraries.