For spaces are used to indent code. The convention is K&R
Double Slashes are used for an one line comment.
Classes, Variables, Methods etc:
/**
* My comment
*
* @myanotation like @param etc.
*/
Feel free to submit pull requests.
For every new feature please write a new PHPUnit test.
Before every commit execute ./vendor/bin/phpunit
to check if your changes wrecked something: