Please include with your report: (1) the example input; (2) the output you
expected; (3) the output PHP Markdown actually produced.
If you have a problem where Markdown gives you an empty result, first check
that the backtrack limit is not too low by running `php --info | grep pcre`.
See Installation and Requirement above for details.
Development and Testing
-----------------------
Pull requests for fixing bugs are welcome. Proposed new features are
going to be meticulously reviewed -- taking into account backward compatibility,
potential side effects, and future extensibility -- before deciding on
acceptance or rejection.
If you make a pull request that includes changes to the parser please add
tests for what is being changed to [MDTest][] and make a pull request there
too.
[MDTest]: https://github.com/michelf/mdtest/
Donations
---------
If you wish to make a donation that will help me devote more time to
PHP Markdown, please visit [michelf.ca/donate] or send Bitcoin to
[1HiuX34czvVPPdhXbUAsAu7pZcesniDCGH].
[michelf.ca/donate]: https://michelf.ca/donate/#!Thanks%20for%20PHP%20Markdown
[1HiuX34czvVPPdhXbUAsAu7pZcesniDCGH]: bitcoin:1HiuX34czvVPPdhXbUAsAu7pZcesniDCGH
Version History
---------------
PHP Markdown Lib 1.7.0 (29 Oct 2016)
* Added a `hard_wrap` configuration variable to make all newline characters
in the text become `
` tags in the HTML output. By default, according
to the standard Markdown syntax these newlines are ignored unless they a
preceded by two spaces. Thanks to Jonathan Cohlmeyer for the implementation.
* Improved the parsing of list items to fix problematic cases that came to
light with the addition of `hard_wrap`. This should have no effect on the
output except span-level list items that ended with two spaces (and thus
ended with a line break).
* Added a `code_span_content_func` configuration variable which takes a
function that will convert the content of the code span to HTML. This can
be useful to implement syntax highlighting. Although contrary to its
code block equivalent, there is no syntax for specifying a language.
Credits to styxit for the implementation.
* Fixed a Markdwon Extra issue where two-space-at-end-of-line hard breaks
wouldn't work inside of HTML block elements such as ``
where the element expects only span-level content.
* In the parser code, switched to PHPDoc comment format. Thanks to
Robbie Averill for the help.
PHP Markdown Lib 1.6.0 (23 Dec 2015)
Note: this version was incorrectly released as 1.5.1 on Dec 22, a number
that contradicted the versioning policy.
* For fenced code blocks in Markdown Extra, can now set a class name for the
code block's language before the special attribute block. Previously, this
class name was only allowed in the absence of the special attribute block.
* Added a `code_block_content_func` configuration variable which takes a
function that will convert the content of the code block to HTML. This is
most useful for syntax highlighting. For fenced code blocks in Markdown
Extra, the function has access to the language class name (the one outside
of the special attribute block). Credits to Mario Konrad for providing the
implementation.
* The curled arrow character for the backlink in footnotes is now followed
by a Unicode variant selector to prevent it from being displayed in emoji
form on iOS.
Note that in older browsers the variant selector is often interpreted as a
separate character, making it visible after the arrow. So there is now a
also a `fn_backlink_html` configuration variable that can be used to set
the link text to something else. Credits to Dana for providing the
implementation.
* Fixed an issue in MarkdownExtra where long header lines followed by a
special attribute block would hit the backtrack limit an cause an empty
string to be returned.
PHP Markdown Lib 1.5.0 (1 Mar 2015)
* Added the ability start ordered lists with a number different from 1 and
and have that reflected in the HTML output. This can be enabled with
the `enhanced_ordered_lists` configuration variable for the Markdown
parser; it is enabled by default for Markdown Extra.
Credits to Matt Gorle for providing the implementation.
* Added the ability to insert custom HTML attributes with simple values
everywhere an extra attribute block is allowed (links, images, headers).
The value must be unquoted, cannot contains spaces and is limited to
alphanumeric ASCII characters.
Credits to Peter Droogmans for providing the implementation.
* Added a `header_id_func` configuration variable which takes a function
that can generate an `id` attribute value from the header text.
Credits to Evert Pot for providing the implementation.
* Added a `url_filter_func` configuration variable which takes a function
that can rewrite any link or image URL to something different.
PHP Markdown Lib 1.4.1 (4 May 2014)
* The HTML block parser will now treat `