# Markdown parsing library
Contains two libraries:
* `/extra`
- Gives you `MardownExtra_Parser` and `Markdown_Parser`
- Docs at http://michelf.ca/projects/php-markdown/extra/
* `/gfm` -- Github Flavored Markdown
- Gives you `WPCom_GHF_Markdown_Parser`
- It has the same interface as `MarkdownExtra_Parser`
- Adds support for fenced code blocks: https://help.github.com/articles/creating-and-highlighting-code-blocks/#fenced-code-blocks
- By default it replaces them with a code shortcode
- You can change this using the `$use_code_shortcode` member variable
- You can change the code shortcode wrapping with `$shortcode_start` and `$shortcode_end` member variables
- The `$preserve_shortcodes` member variable will preserve all registered shortcodes untouched. Requires WordPress to be loaded for `get_shortcode_regex()`
- The `$preserve_latex` member variable will preserve oldskool $latex yer-latex$ codes untouched.
- The `$strip_paras` member variable will strip <p> tags because that's what WordPress likes.
- See `WPCom_GHF_Markdown_Parser::__construct()` for how the above member variable defaults are set.