I want to learn how to code webpages what languages do i need to know?

The base is HTML/CSS and Javascript. Then PHP goes well with it. However you can have alot of different backend languages such as C#

html and css is all you need, i would recommend sololearn if you are a beginner

look into Udacity courses. Most of them are free if you want just to learn (no paid nanodegrees) and they have awesome basics into web. I can recommend "Intro into Html and CSS" for beginning and "Responsive Web Design Fundamentals" as next

If you understand spanish i would recommend you codigofacilito, it has a lot of free courses, most of them are about web development (frontend & backend)

Looks like it's time for me to bring back the flowchart:

thanks for sharing this useful stuff with the community
cheers

It totally depends on what you wanna do. If you want to build/extend CMS systems or if you only want to put out single HTML webpages. The overview from kadreyalta is genius ??
If you're new to the game and want to be able to create something for yourself and small clients - learn Wordpress (html, css, php) and you'll be set.

Also note there's a significant difference between learning coding from bootcamp and understanding CS fundamentals. If you're looking for a job in the future these will become important.

If you're a beginner, w3schools is a good resource for learning the basics on Web Development.