Markdown parser that implements (the commonmark specs)[http://spec.commonmark.org/0.24/].
This parser is strongly inspired by https://github.com/cebe/markdown. I basically rewrote it after getting a grasp of how it worked, for self-educative purposes. I don't know if the original respects the commonmark specs, though.
I intend to add three small things to the spec'd markdown: image dimension control (because that's convenient), image collages (because that's cool, and I've used it in the past), and "back-clickable" footnotes (because that's really handy).
composer require j11e/markdown
No CLI tool right now, just a Parser class with a public parse() method.
So, $parser = new j11e\markdown\Parser();, then $parser->parse().