it's just "yet another c-style/curly brackets scripting language", which isn't hard to learn and especially easy to use and which was and still is heavily used in context of web-development.
why? its very efficient/productive ... which is of special interest for example for smaller fixed-rate projects, mvps and similar use-cases.
even if php has many flaws, it got a few things right and is for example available on nearly every webhoster out there ...
but: don't stop learning programming-languages with php. add for example javascript, but also python, some functional language - no, not haskel, i prefer ocaml - and other languages to your "selection of tools" ... :)
btw. another example ... "everybodys darling" javascript:
compared to javascript php is a pretty decent language ... just search the net on critiques on javascript, and despite that: everybody uses it.
why? because its in every browser / on every system / every mobile-platform etc.
availability/accessibility/... counts more than some academically influenced aesthetic discussions from some "theoretical computer-science point of view" ;))
laravel.com
laracasts.com
forge.larvel.com
laravel-livewire.com
Great framework, great community and great suite of tools to make developing fun.
For instance, I have been using Python all my career, but to this day it is a niche language in my country. I also know PHP, Java, and C++ from school and personal projects (guess which I used for school and which for personal projects), and I have considered job offers in the past when Python was extremely unmarketable. One of those times I had to move to another city for nearly a year to avoid switching to another language.
What are your objectives? Why are you learning it? Is PHP your first language? Are you trying to get a job, get general stuff done, or have a specific project in mind? Are you primarily looking at web, text processing, database?
My own thoughts on PHP today is it is a very capable language, and probably as worthy of learning as Python, Ruby, or any of the other mainstream scripting languages - again depends what your objectives are.
In other words - how long is a piece of string? ;)