php-hover-documentation
A simple Atom package that displays the definition and description of PHP functions when you hover their names.
EmilePerron 5,616 3 0.2.1 MIT GitHub

PHP Hover Documentation

PHP is nice, but it lacks a bit of standardization, which can make its built-in functions hard to use.

This simple package adds a tooltip with the definition and description of PHP's built-in methods when you hover them. It's nothing fancy, but it saved me a lot of time, and I bet it'll do the same for you!