Disclaimer: author of Kint here.
I’d just like to encourage those who have not heard of it, check Kint out:
https://github.com/raveren/kint/tree/1.0.0-wip
It’s been in the works for years, has tons of useful features like keyboard navigation, plain text alternative, trace output and so on, and most importantly - it’s effortless to install and use. Composer support is there, but highly optional - and Kint even supports PHP5.2 when you’re stuck with terrible old projects. Needless to say, every later major version is supported and provides more functionality.