W3school
Hello steemit,
I would like to introduce you to the best website for JS HTML CSS PHP learning, everything is clear, referenced, with full examples and sandbox mode.
It is 100% free with 0 ads, however, i don't think there is any forum, but it is great to beggin on it, and even if you aleready have some knowledge about these programing languages, then you can still use it in order to help you remember some methods, commands, or anything.
happy coding :D