Java is the most used code base system anywhere, easy to learn and to code. I think java for me sounds like a better deal to learn and to try to get a job since have a lot of search on the market for java developer.
Honestly, you need to learn them all. Java, jscript, php, and python, all kind of go together. Learning one isn't enough to get a job here. Programmers have to know multiple scripting and programming languages to get work.
I don't think PHP or Java is worth the time at all. Java is old as hell and really outclassed by languages like C#. Python however is worth a lot nowadays.
java is still good starting point, python and php are so easy that if you know java, it only takes few days to learn those because all you need to figure out is the syntax. sql is completely different thing and there is much more to it than just syntax, so that might need more time