Differences between html, css, js, php categories

Can you tell me the differences and what kind of things can be published in each one? for example in all there are price tables and if you wanted to make a price table I do not know in what category to upload it

  • HTML5 is mainly for items that use the new features introduced in HTML 5 (canvases, games, etc).
  • CSS is for items which use pure HTML/CSS and do not require JavaScript.
  • JavaScript is for any items which do require JavaScript.
  • PHP is for any items which require PHP scripts to work.

A pricing table made in HTML and CSS should go in the CSS category.

Thank you