$tree = array();
         $result = array();
         //$root_node = new stdClass();
//       $tree = new stdClass();
            //$tree = array();
         $tree[$root_node->document_srl]->node = $root_node;

# Heading 1 #
## Heading 2 ##
### Heading 3 ##############

*italic*, **bold**
escape \*

- Use a minus sign for a bullet list
+ Or plus sign
* Or an asterisk
1. Numbered lists are easy
2. Markdown keeps track of the numbers for you
7. So this will be item 3.

Links:
   http://site/page
   Add description: [Page description](http://site/page)
   Link to pages in the same wiki: [Page description](page_alias)
Smart links:
   Add a name or id to your link: [Here's a nice link][1]
   And then detail it in the page footer for clarity: [1]: www.google.com

Images:

Line breaks
- Add an empty line
- Add two spaces the end of a line

For more help, take a look at:

• PHP Markdown extra - http://michelf.com/projects/php-markdown/extra/
  
• Markdown's official reference - http://daringfireball.net/projects/markdown/syntax
  

$tree = array();
         $result = array();
         //$root_node = new stdClass();
//       $tree = new stdClass();
            //$tree = array();
         $tree[$root_node->document_srl]->node = $root_node;