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Developer Documentation
See Release Notes
Long Term Support Release
- Bug fixes for general core bugs in 3.9.x will end* 10 May 2021 (12 months).
- Bug fixes for security issues in 3.9.x will end* 8 May 2023 (36 months).
- PHP version: minimum PHP 7.2.0 Note: minimum PHP version has increased since Moodle 3.8. PHP 7.3.x and 7.4.x are supported too.
/lib/markdown/ -> Markdown.php (source)
Differences Between: [Versions 39 and 311] [Versions 39 and 400] [Versions 39 and 401] [Versions 39 and 402] [Versions 39 and 403]
Markdown - A text-to-HTML conversion tool for web writers
| Author: | Michel Fortin <michel.fortin@michelf.com> |
| Copyright: | 2004-2018 Michel Fortin <https://michelf.com/projects/php-markdown/> |
| Copyright: | (Original Markdown) 2004-2006 John Gruber <https://daringfireball.net/projects/markdown/> |
| File Size: | 1910 lines (51 kb) |
| Included or required: | 0 times |
| Referenced: | 0 times |
| Includes or requires: | 0 files |
Defines 1 class
Markdown:: (55 methods):
defaultTransform()
__construct()
setup()
teardown()
transform()
stripLinkDefinitions()
_stripLinkDefinitions_callback()
hashHTMLBlocks()
_hashHTMLBlocks_callback()
hashPart()
hashBlock()
runBlockGamut()
runBasicBlockGamut()
doHorizontalRules()
runSpanGamut()
doHardBreaks()
_doHardBreaks_callback()
doAnchors()
_doAnchors_reference_callback()
_doAnchors_inline_callback()
doImages()
_doImages_reference_callback()
_doImages_inline_callback()
doHeaders()
_doHeaders_callback_setext()
_doHeaders_callback_atx()
_generateIdFromHeaderValue()
doLists()
_doLists_callback()
processListItems()
_processListItems_callback()
doCodeBlocks()
_doCodeBlocks_callback()
makeCodeSpan()
prepareItalicsAndBold()
doItalicsAndBold()
doBlockQuotes()
_doBlockQuotes_callback()
_doBlockQuotes_callback2()
formParagraphs()
encodeAttribute()
encodeURLAttribute()
encodeAmpsAndAngles()
doAutoLinks()
_doAutoLinks_url_callback()
_doAutoLinks_email_callback()
encodeEntityObfuscatedAttribute()
parseSpan()
handleSpanToken()
outdent()
detab()
_detab_callback()
_initDetab()
unhash()
_unhash_callback()
Markdown Parser Class
| defaultTransform($text) X-Ref |
| Simple function interface - Initialize the parser and return the result of its transform method. This will work fine for derived classes too. param: string $text return: string |
| __construct() X-Ref |
| Constructor function. Initialize appropriate member variables. return: void |
| setup() X-Ref |
| Called before the transformation process starts to setup parser states. return: void |
| teardown() X-Ref |
| Called after the transformation process to clear any variable which may be taking up memory unnecessarly. return: void |
| transform($text) X-Ref |
| Main function. Performs some preprocessing on the input text and pass it through the document gamut. param: string $text return: string |
| stripLinkDefinitions($text) X-Ref |
| Strips link definitions from text, stores the URLs and titles in hash references param: string $text return: string |
| _stripLinkDefinitions_callback($matches) X-Ref |
| The callback to strip link definitions param: array $matches return: string |
| hashHTMLBlocks($text) X-Ref |
| Hashify HTML blocks param: string $text return: string |
| _hashHTMLBlocks_callback($matches) X-Ref |
| The callback for hashing HTML blocks param: string $matches return: string |
| hashPart($text, $boundary = 'X') X-Ref |
| Called whenever a tag must be hashed when a function insert an atomic element in the text stream. Passing $text to through this function gives a unique text-token which will be reverted back when calling unhash. The $boundary argument specify what character should be used to surround the token. By convension, "B" is used for block elements that needs not to be wrapped into paragraph tags at the end, ":" is used for elements that are word separators and "X" is used in the general case. param: string $text param: string $boundary return: string |
| hashBlock($text) X-Ref |
| Shortcut function for hashPart with block-level boundaries. param: string $text return: string |
| runBlockGamut($text) X-Ref |
| Run block gamut tranformations. We need to escape raw HTML in Markdown source before doing anything else. This need to be done for each block, and not only at the begining in the Markdown function since hashed blocks can be part of list items and could have been indented. Indented blocks would have been seen as a code block in a previous pass of hashHTMLBlocks. param: string $text return: string |
| runBasicBlockGamut($text) X-Ref |
| Run block gamut tranformations, without hashing HTML blocks. This is useful when HTML blocks are known to be already hashed, like in the first whole-document pass. param: string $text return: string |
| doHorizontalRules($text) X-Ref |
| Convert horizontal rules param: string $text return: string |
| runSpanGamut($text) X-Ref |
| Run span gamut transformations param: string $text return: string |
| doHardBreaks($text) X-Ref |
| Do hard breaks param: string $text return: string |
| _doHardBreaks_callback($matches) X-Ref |
| Trigger part hashing for the hard break (callback method) param: array $matches return: string |
| doAnchors($text) X-Ref |
| Turn Markdown link shortcuts into XHTML <a> tags. param: string $text return: string |
| _doAnchors_reference_callback($matches) X-Ref |
| Callback method to parse referenced anchors param: string $matches return: string |
| _doAnchors_inline_callback($matches) X-Ref |
| Callback method to parse inline anchors param: string $matches return: string |
| doImages($text) X-Ref |
| Turn Markdown image shortcuts into <img> tags. param: string $text return: string |
| _doImages_reference_callback($matches) X-Ref |
| Callback to parse references image tags param: array $matches return: string |
| _doImages_inline_callback($matches) X-Ref |
| Callback to parse inline image tags param: array $matches return: string |
| doHeaders($text) X-Ref |
| Parse Markdown heading elements to HTML param: string $text return: string |
| _doHeaders_callback_setext($matches) X-Ref |
| Setext header parsing callback param: array $matches return: string |
| _doHeaders_callback_atx($matches) X-Ref |
| ATX header parsing callback param: array $matches return: string |
| _generateIdFromHeaderValue($headerValue) X-Ref |
| If a header_id_func property is set, we can use it to automatically generate an id attribute. This method returns a string in the form id="foo", or an empty string otherwise. param: string $headerValue return: string |
| doLists($text) X-Ref |
| Form HTML ordered (numbered) and unordered (bulleted) lists. param: string $text return: string |
| _doLists_callback($matches) X-Ref |
| List parsing callback param: array $matches return: string |
| processListItems($list_str, $marker_any_re) X-Ref |
| Process the contents of a single ordered or unordered list, splitting it into individual list items. param: string $list_str param: string $marker_any_re return: string |
| _processListItems_callback($matches) X-Ref |
| List item parsing callback param: array $matches return: string |
| doCodeBlocks($text) X-Ref |
| Process Markdown `<pre><code>` blocks. param: string $text return: string |
| _doCodeBlocks_callback($matches) X-Ref |
| Code block parsing callback param: array $matches return: string |
| makeCodeSpan($code) X-Ref |
| Create a code span markup for $code. Called from handleSpanToken. param: string $code return: string |
| prepareItalicsAndBold() X-Ref |
| Prepare regular expressions for searching emphasis tokens in any context. return: void |
| doItalicsAndBold($text) X-Ref |
| Convert Markdown italics (emphasis) and bold (strong) to HTML param: string $text return: string |
| doBlockQuotes($text) X-Ref |
| Parse Markdown blockquotes to HTML param: string $text return: string |
| _doBlockQuotes_callback($matches) X-Ref |
| Blockquote parsing callback param: array $matches return: string |
| _doBlockQuotes_callback2($matches) X-Ref |
| Blockquote parsing callback param: array $matches return: string |
| formParagraphs($text, $wrap_in_p = true) X-Ref |
| Parse paragraphs param: string $text String to process in paragraphs param: boolean $wrap_in_p Whether paragraphs should be wrapped in <p> tags return: string |
| encodeAttribute($text) X-Ref |
| Encode text for a double-quoted HTML attribute. This function is *not* suitable for attributes enclosed in single quotes. param: string $text return: string |
| encodeURLAttribute($url, &$text = null) X-Ref |
| Encode text for a double-quoted HTML attribute containing a URL, applying the URL filter if set. Also generates the textual representation for the URL (removing mailto: or tel:) storing it in $text. This function is *not* suitable for attributes enclosed in single quotes. param: string $url param: string &$text Passed by reference return: string URL |
| encodeAmpsAndAngles($text) X-Ref |
| Smart processing for ampersands and angle brackets that need to be encoded. Valid character entities are left alone unless the no-entities mode is set. param: string $text return: string |
| doAutoLinks($text) X-Ref |
| Parse Markdown automatic links to anchor HTML tags param: string $text return: string |
| _doAutoLinks_url_callback($matches) X-Ref |
| Parse URL callback param: array $matches return: string |
| _doAutoLinks_email_callback($matches) X-Ref |
| Parse email address callback param: array $matches return: string |
| encodeEntityObfuscatedAttribute($text, &$tail = null, $head_length = 0) X-Ref |
| Input: some text to obfuscate, e.g. "mailto:foo@example.com" Output: the same text but with most characters encoded as either a decimal or hex entity, in the hopes of foiling most address harvesting spam bots. E.g.: mailto:foo @example.co m Note: the additional output $tail is assigned the same value as the ouput, minus the number of characters specified by $head_length. Based by a filter by Matthew Wickline, posted to BBEdit-Talk. With some optimizations by Milian Wolff. Forced encoding of HTML attribute special characters by Allan Odgaard. param: string $text param: string &$tail param: integer $head_length return: string |
| parseSpan($str) X-Ref |
| Take the string $str and parse it into tokens, hashing embeded HTML, escaped characters and handling code spans. param: string $str return: string |
| handleSpanToken($token, &$str) X-Ref |
| Handle $token provided by parseSpan by determining its nature and returning the corresponding value that should replace it. param: string $token param: string &$str return: string |
| outdent($text) X-Ref |
| Remove one level of line-leading tabs or spaces param: string $text return: string |
| detab($text) X-Ref |
| Replace tabs with the appropriate amount of spaces. For each line we separate the line in blocks delemited by tab characters. Then we reconstruct every line by adding the appropriate number of space between each blocks. param: string $text return: string |
| _detab_callback($matches) X-Ref |
| Replace tabs callback param: string $matches return: string |
| _initDetab() X-Ref |
| Check for the availability of the function in the `utf8_strlen` property (initially `mb_strlen`). If the function is not available, create a function that will loosely count the number of UTF-8 characters with a regular expression. return: void |
| unhash($text) X-Ref |
| Swap back in all the tags hashed by _HashHTMLBlocks. param: string $text return: string |
| _unhash_callback($matches) X-Ref |
| Unhashing callback param: array $matches return: string |
