Job market is good for PHP and it is easy to learn but handling concurrency is complex whereas Golang has been designed to make concurrency as smooth as a cakewalk.

Golang job market is going strong as more and more people are realizing the benefits of choosing a language that supports concurrency from the start. Golang supports parallelism utilizing all CPU cores. Golang also is lightweight in terms of memory requirements hence you save on the infrastructure costs.

The biggest advantage of Golang is that it is fun to code. I came from Java background and i never looked back at Java once i started coding in Golang. Dependency management is also sorted out with godep tool now.

Disadvantage of Golang is that it is new and the community is still not as big as that of php and java although it is growing very fast. So you will not find libraries for few cases.

To summarize, if your use case does not require concurrency and scale and you are looking to get a job quickly, go for php.

But if you are looking at having some fun and developing programs that supports concurrency and can massively scale go for Golang. Also it will take some time to get a job in golang.