Which languages are needed to build a website from scratch for cross platform?

[thekingmaker]

I am planning to create blog with forum from scratch so i am wondering which language should my website be created so that it is easier to covert it into an mobile app?

 

[finco]

The Good Traditional
HTML, CSS and Javascript for the frontend.
PHP and MySql for the Backend and Database

Cordova tech wrap it to a cross platform Mobile App

 

[SuperKingCheese]

I am planning to create blog with forum from scratch so i am wondering which language should my website be created so that it is easier to covert it into an mobile app?

Like @finco said, you need to learn a whole tech stack.

 

[thekingmaker]

The Good Traditional
HTML, CSS and Javascript for the frontend.
PHP and MySql for the Backend and Database

Cordova tech wrap it to a cross platform Mobile App

Thanks but instead of learning php and mysql can i use service like phpbb to add a forum? I am asking this because i have already learned html,css and a little bit of javascript.

 

[finco]

Thanks but instead of learning php and mysql can i use service like phpbb to add a forum? I am asking this because i have already learned html,css and a little bit of javascript.

Of course you can. My suggestion was because you mentioned "From Scratch" in your original post.
Scratch means from the beginning right? As in without already made platforms like that.

 

[comet_face]

You can make both frontend and backend with JavaScript only (Node.js).

Also, check Github for blog/forum engines:

https://github.com/search?q=node.js+blog
https://github.com/search?q=node.js+forum

 

[hexagonal]

Flutter
https://flutter.dev
You can also create a web app and then create a mobile app that only renders the webpage, will need to add couple features to get it approved

 

[JSCode]

It would require, HTML, CSS, and Javascript. You should learn Javascript frameworks such as Aurelia, Angular 2 or React, and Bootstrap. This should be enough to have a responsive forum.