Computers & IT (Non-Engg)

If you are doing self-study, you must think of enrolling in a good institute that can train you in the CCNA syllabus. A good training institute such as Softlogic Systems in Chennai can offer the best training in CCNA via both theory and lab sessions. Softlogic also has an in-house Pearson Vue testing centre where you can take the CCNA exam. So, enrol yourself in the CCNA networking program at Softlogic Chennai.
CCNA (Cisco Certified Networking Administrator) is offered by Cisco Corporation which has designed the course by including all the major networking concepts and Cisco network products.
The CCNA certification offered by Cisco may be little difficult to clear. But, once you clear the exam you will be a hot property in the networking job market. Failure is the stepping stone for success. So, don't lose heart when you do not clear the exam in the first attempt itself.

Dear Priyank,
Your question is not a surprise since WordPress is more popular than ROR and PHP. WordPress is a content management system developed with PHP. WordPress has a market share of 90.5% (as of Jan 2017). WordPress is used by 58.6% of all the websites whose content management system we know. This is 27.4% of all websites. (according to W3Tech). PHP is a programming language (PHP: Hypertext Preprocessor), which is used to build WordPress CMS. To Answer your question:
If you like to have a Content Management System for your website - WordPress is a good choice. If you want to write your own Content Management System or anything sort of a complex custom web application, you would really require PHP. If you like to extend WordPress with your own custom plugins - you will still require PHP, HTML and CSS.

From there, I would recommend this. Learn C and C+ or something similar. Then, you can just work on building your projects. There is a good deal of support for C (it has been around a long time and is still one of the most popular languages), so you can usually get help within a matter of minutes or hours depending on the complexity of the problem.
Good luck.
EDIT: I forgot to mention YouTube. You can learn just about anything you might want to do in C/C+ on there. There are countless tutorials and even channels that focus solely on that language. Check it out when you are working on a project. Chances are good that someone, somewhere has done something similar.