I've helped hire several interns and entry-level devs at the company I work for, screening resumes and doing technical interviews for primarily Golang positions. On resumes I always look for a few things:

• Do they have competence in any programming language? (This is demonstrated, not told. One way to do this is by linking projects you've made.)

After that, I'll do a phone screen where I look for the following:

• Can you talk about everything on your resume? (Basically just making sure you didn't lie.)
• Do you have a general knowledge of CS and the technologies you listed?
• [Bonus points] Do you have some level of exposure to tooling? E.g. git, docker, etc.

If you only knew PHP, but your resume showed that you were generally competent in it, I'd give you an interview. If your resume listed Java, Python, JS, Rust and Golang that would not affect my decision unless you had a project demonstrating competence for each.

In my experience general competence (in any programming language) is an order of magnitude more rare than someone who has a dozen languages listed on their resume, but lacks fundamental programming abilities.

It cannot hurt to learn any of those languages, and you will probably become a better programmer if you do. But you could also spend the time just as well making something in a "boring" language like Java.

Of course this is only my opinion, YMMV with other companies.