To answer your question straight, learn the following markup languages:
- html, the foundation
- css, the design
For the rest, the data processing and the interaction:
- php, data processing,
- c#, data processing,
- python, data processing,
- c, data processing,
- c++, data processing,
- java, data processing
Any of the data processing languages will fit your needs, however, only php is solely focused on data processing, any of the other languages have lots of other non-web related features.
Data processing = storing and retrieving data from a database.
Tamil, you have asked this question, and similar questions already. Use the answers provided to continue your journey and stop asking the same question over again. There are tons of sites that explain in depth which languages you could start with, why and how to start with it. https://www.w3schools.com
is in my opinion a great site for starting to learn everything you need to know about web development, but don't focus on the certifications, they aren't worth anything but pretty much everything else on the website is good content.
There is also stack overflow, an excellent site for troubleshooting issues you come across when learning programming languages.