This site has a short list of some of the easiest to learn and use.
It's not necessarily the easiest, but it IS the most logical. Learn C.
That will enable you to learn C++ which is, structurally-speaking similar to Java. You'll then find PHP easy.
The others are all different. HTML has been mentioned. This is both a coding scheme and a programming language. Early versions were mainly coding scheme, later versions, more of a programming language. HTML is easy to develop and test.
If you are writing freestanding applications, I'd chose C++