If your intention is to continue as a web designer, Java and PHP will not be needed. Web Development is an other thing. Although, you can use a moderate knowledge of PHP. JavaScript libraries such as JQuery, Ajax and etc are in demand and are usually considered one of the basic languages used for Web 2.0 as well as HTML5 and etc. I would suggest you learn both JavaScript and PHP. But learn JavaScript first because 1. it is an easier language than PHP to learn and 2. it is a slim chance you will be asked to do any PHP programming as a web designer (but not impossible).
|