Markdown Discuss - May 2007 - PHP Markdown 1.0.2b8 & Extra 1.1.3b1

Bug fixes for PHP Markdown & Extra, available as beta version for  
now. You can download them from these URLs.

<http://www.michelf.com/docs/projets/php-markdown-1.0.2b8.zip>
<http://www.michelf.com/docs/projets/php-markdown-extra-1.1.3b1.zip>

One noticeable change in these releases is that PHP Markdown now  
outputs numeric character references for escaped characters  (like  
&#45; for \-) to avoid clashes with SmartyPants. (See changelog below  
for details.) If this is causing problem to someone, I'd like to know.

As these are betas, they include support for reference-style  
[shortcut] links unlike the most recent non-beta releases of PHP  
Markdown for which this code has been commented out.

Here's what changed. As usual, changes for PHP Markdown apply to PHP  
Markdown Extra too.

PHP Markdown 1.0.2b8:

*   Fixed a problem with WordPress 2.x where full-content posts in  
RSS feeds
     were not processed correctly by Markdown.

*   Now supports URLs containing literal parentheses for inline links
     and images, such as:

         [WIMP](http://en.wikipedia.org/wiki/WIMP_(computing))

     Such parentheses may be arbitrarily nested, but must be
     balanced. Unbalenced parentheses are allowed however when the URL
     when escaped or when the URL is enclosed in angle brakets `<>`.

*   Fixed a performance problem where the regular expression for strong
     emphasis introduced in version 1.0.1d could sometime be long to  
process,
     give slightly wrong results, and in some circumstances could remove
     entirely the content for a whole paragraph.

*   Some change in version 1.0.1d made possible the incorrect nesting of
     anchors within each other. This is now fixed.

*   Fixed a rare issue where certain MD5 hashes in the content could
     be changed to their corresponding text. For instance, this:

         The MD5 value for "+" is
"26b17225b626fb9238849fd60eabdf60".

     was incorrectly changed to this in previous versions of PHP  
Markdown:

         <p>The MD5 value for "+" is "+".</p>

*   Now convert the escaped characters to their numeric character
     references equivalent.

     This fix an integration issue with SmartyPants and backslash  
escapes.
     Since Markdown and SmartyPants have some escapable characters in  
common,
     it was sometime necessary to escape them twice. Previously, two
     backslashes were sometime required to prevent Markdown from  
"eating" the
     backslash before SmartyPants sees it:

         Here are two hyphens: \\--

     Now, only one backslash will do:

         Here are two hyphens: \--


PHP Markdown Extra 1.1.3b1:

*   The markdown="" attribute now accepts unquoted values.

*   Fixed an issue where underscore-emphasis didn't work when applied  
on the
     first or the last word of an element having the markdown="1" or
     markdown="span" attribute set unless there was some surrounding  
whitespace.
     This didn't work:

         <p markdown="1">_Hello_ _world_</p>

     Now it does produce emphasis as expected.

*   Fixed an issue preventing footnotes from working when the parser's
     footnote id prefix variable (fn_id_prefix) is not empty.

*   Fixed a performance problem where the regular expression for strong
     emphasis introduced in version 1.1 could sometime be long to  
process,
     give slightly wrong results, and in some circumstances could remove
     entirely the content for a whole paragraph.

*   Fixed an issue were abbreviations tags could be incorrectly added
     inside URLs and title of links.

*   Placing footnote markers inside a link, resulting in two nested  
links, is
     no longer allowed.


Michel Fortin
michel.fortin at michelf.com
http://www.michelf.com/