org\parser\driver\Markdown::transform PHP Метод

    protected function transform($text)
    {
        #
        # Main function. Performs some preprocessing on the input text
        # and pass it through the document gamut.
        #
        $this->setup();
        # Remove UTF-8 BOM and marker character in input, if present.
        $text = preg_replace('{^\\xEF\\xBB\\xBF|\\x1A}', '', $text);
        # Standardize line endings:
        #   DOS to Unix and Mac to Unix
        $text = preg_replace('{\\r\\n?}', "\n", $text);
        # Make sure $text ends with a couple of newlines:
        $text .= "\n\n";
        # Convert all tabs to spaces.
        $text = $this->detab($text);
        # Turn block-level HTML blocks into hash entries
        $text = $this->hashHTMLBlocks($text);
        # Strip any lines consisting only of spaces and tabs.
        # This makes subsequent regexen easier to write, because we can
        # match consecutive blank lines with /\n+/ instead of something
        # contorted like /[ ]*\n+/ .
        $text = preg_replace('/^[ ]+$/m', '', $text);
        # Run document gamut methods.
        foreach ($this->document_gamut as $method => $priority) {
            $text = $this->{$method}($text);
        }
        $this->teardown();
        return $text . "\n";
    }