If a person learns html,css and javascript then it will do any help in upgrading the WordPress website or not.

Question

can WordPress websites can be upgraded by learning web design.

Answer 1

While a good knowledge of HTML/CSS/JavaScript is great, the real meat and potatoes of Wordpress (the core) is written in PHP. PHP is the back-end scripting language that WP uses. Using PHP, you can create your own query loops to dynamically display and filter data, hook into actions and filters, and write your own plugins -- changing the look and feel of WP immensely.

To summarize:

You're a WP designer with HTML/CSS/JS. You're a WP *developer* when you can manipulate WP with PHP/Server-side programming.

Answer 2

with a little more expert on they and learn more about PHP.