php使用Parsedown来将markdown转换成html示例代码-php代码-BFW代码库

代码语言：php

所属分类：其他

代码描述：php使用Parsedown来将markdown转换成html示例代码，github：https://github.com/erusev/parsedown

代码标签： php 使用 Parsedown 将 markdown 转换成 html 示例代码

下面为部分代码预览，完整代码请点击下载或在bfwstudio webide中打开

<?php

class Parsedown
{
    # ~

    const version = '1.7.4';

    # ~

    function text($text)
    {
        # make sure no definitions are set
        $this->DefinitionData = array();

        # standardize line breaks
        $text = str_replace(array("\r\n", "\r"), "\n", $text);

        # remove surrounding line breaks
        $text = trim($text, "\n");

        # split text into lines
        $lines = explode("\n", $text);

        # iterate through lines to identify blocks
        $markup = $this->lines($lines);

        # trim line breaks
        $markup = trim($markup, "\n");

        return $markup;
    }

    #
    # Setters
    #

    function setBreaksEnabled($breaksEnabled)
    {
        $this->breaksEnabled = $breaksEnabled;

        return $this;
    }

    protected $breaksEnabled;

    function setMarkupEscaped($markupEscaped)
    {
        $this->markupEscaped = $markupEscaped;

        return $this;
    }

    protected $markupEscaped;

    function setUrlsLinked($urlsLinked)
    {
        $this->urlsLinked = $urlsLinked;

        return $this;
    }

    protected $urlsLinked = true;

    function setSafeMode($safeMode)
    {
        $this->safeMode = (bool) $safeMode;

        return $this;
    }

    protected $safeMode;

    protected $safeLinksWhitelist = array(
        'http://',
        'https://',
        'ftp://',
        'ftps://',
        'mailto:',
        'data:image/png;base64,',
        'data:image/gif;base64,',
        'data:image/jpeg;base64,',
        'irc:',
        'ircs:',
        'git:',
        'ssh:',
        'news:',
        'steam:',
    );

    #
    # Lines
    #

    protected $BlockTypes = array(
        '#' => array('Header'),
        '*' => array('Rule', 'List'),
        '+' => array('List'),
        '-' => array('SetextHeader', 'Table', 'Rule', 'List'),
        '0' => array('List'),
        '1' => array('List'),
        '2' => array('List'),
        '3' => array('List'),
        '4' => array('List'),
        '5' => array('List'),
        '6' => array('List'),
        '7' => array('List'),
        '8' => array('List'),
        '9' => array('List'),
        ':' => array('Table'),
        '<' => array('Comment', 'Markup'),
        '=' => array('SetextHeader'),
        '>' => array('Quote'),
        '[' => array('Reference'),
        '_' => array('Rule'),
        '`' => array('FencedCode'),
        '|' => array('Table'),
        '~' => array('FencedCode'),
    );

    # ~

    protected $unmarkedBlockTypes = array(
        'Code',
    );

    #
    # Blocks
    #

    protected function lines(array $lines)
    {
        $CurrentBlock = null;

        foreach ($lines as $line)
        {
            if (chop($line) === '')
            {
                if (isset($CurrentBlock))
                {
                    $CurrentBlock['interrupted'] = true;
                }

                continue;
            }

            if (strpos($line, "\t") !== false)
            {
                $parts = explode("\t", $line);

                $line = $parts[0];

                unset($parts[0]);

                foreach ($parts as $part)
                {
                    $shortage = 4 - mb_strlen($line, 'utf-8') % 4;

                    $line .= str_repeat(' ', $shortage);
                    $line .= $part;
                }
            }

            $indent = 0;

            while (isset($line[$indent]) and $line[$indent] === ' ')
            {
                $indent ++;
            }

            $text = $indent > 0 ? substr($line, $indent) : $line;

            # ~

            $Line = array('body' => $line, 'indent' => $indent, 'text' => $text);

            # ~

            if (isset($CurrentBlock['continuable']))
            {
                $Block = $this->{'block'.$CurrentBlock['type'].'Continue'}($Line, $CurrentBlock);

                if (isset($Block))
                {
                    $CurrentBlock = $Block;

                    continue;
                }
                else
                {
                    if ($this->isBlockCompletable($CurrentBlock['type']))
                    {
                        $CurrentBlock = $this->{'block'.$CurrentBlock['type'].'Complete'}($CurrentBlock);
                    }
                }
            }

            # ~

            $marker = $text[0];

            # ~

            $blockTypes = $this->unmarkedBlockTypes;

            if (isset($this->BlockTypes[$marker]))
            {
                foreach ($this->BlockTypes[$marker] as $blockType)
                {
                    $blockTypes []= $blockType;
                }
            }

            #
            # ~

            foreach ($blockTypes as $blockType)
            {
                $Block = $this->{'block'.$blockType}($Line, $CurrentBlock);

                if (isset($Block))
                {
                    $Block['type'] = $blockType;

                    if ( ! isset($Block['identified']))
                    {
                        $Blocks []= $CurrentBlock;

                        $Block['identified'] = true;
                    }

                    if ($this->isBlockContinuable($blockType))
                    {
                        $Block['continuable'] = true;
                    }

                    $CurrentBlock = $Block;

                    continue 2;
                }
            }

            # ~

            if (isset($CurrentBlock) and ! isset($CurrentBlock['type']) and ! isset($CurrentBlock['interrupted']))
            {
                $CurrentBlock['element']['text'] .= "\n".$text;
            }
            else
            {
                $Blocks []= $CurrentBlock;

                $CurrentBlock = $this->paragraph($Line);

                $CurrentBlock['identified'] = true;
            }
        }

        # ~

        if (isset($CurrentBlock['continuable']) and $this->isBlockCompletable($CurrentBlock['type']))
        {
            $CurrentBlock = $this->{'block'.$CurrentBlock['type'].'Complete'}($CurrentBlock);
        }

        # ~

        $Blocks []= $CurrentBlock;

        unset($Blocks[0]);

        # ~

        $markup = '';

        foreach ($Blocks as $Block)
        {
            if (isset($Block['hidden']))
            {
                continue;
            }

            $markup .= "\n";
            $markup .= isset($Block['markup']) ? $Block['markup'] : $this->element($Block['element']);
        }

        $markup .= "\n";

        # ~

        return $markup;
    }

    protected function isBlockContinuable($Type)
    {
        return method_exists($this, 'block'.$Type.'Continue');
    }

    protected function isBlockCompletable($Type)
    {
        return method_exists($this, 'block'.$Type.'Complete');
    }

    #
    # Code

    protected function blockCode($Line, $Block = null)
    {
        if (isset($Block) and ! isset($Block['type']) and ! isset($Block['interrupted']))
        {
            return;
        }

        if ($Line['indent'] >= 4)
        {
            $text = substr($Line['body'], 4);

            $Block = array(
                'element' => array(
                    'name' => 'pre',
                    'handler' => 'element',
                    'text' => array(
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