i m an experienced programmer (20+ years) and for the needs of some projects i ll need to get into web development client & server side in order to build up a few websites.
As far as i ve seen there is a number of languages i need to look/expert at like php, html/5, css, ajax, python, ruby,js, jquery and several frameworks.
Is it a must to know all of them in order to build up a dynamic custom websites from scratch or based on other frameworks?
Learn and use a new language is not a problem, as i said i ve got plenty of experience, its just a matter of days, but where i stack is what to learn and what to skip. There are so many web dev languages and libraries/frameworks for each language. Is there any where to find at least a good guide on all these?