php使用Parsedown来将markdown转换成html示例代码
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( 'name' => 'code', 'text' => $text, ), ), ); return $Block; } } protected function blockCodeContinue($Line, $Block) { if ($Line['indent'] >= 4) { if (isset($Block['interrupted'])) { $Block['element']['text']['text'] .= "\n"; unset($Block['interrupted']); } $Block['element']['text']['text'] .= "\n"; $text = substr($Line['body'], 4); $Block['element']['text']['text'] .= $text; return $Block; } } protected function blockCodeComplete($Block) { $text = $Block['element']['text']['text']; $Block['element']['text']['text'] = $text; return $Block; } # # Comment protected function blockComment($Line) { if ($this->markupEscaped or $this->safeMode) { return; } if (isset($Line['text'][3]) and $Line['text'][3] === '-' and $Line['text'][2] === '-' and $Line['text'][1] === '!') { $Block = array( 'markup' => $Line['body'], ); if (preg_match('/-->$/', $Line['text'])) { $Block['closed'] = true; } return $Block; } } protected function blockCommentContinue($Line, array $Block) { if (isset($Block['closed'])) { return; } $Block['markup'] .= "\n" . $Line['body']; if (preg_match('/-->$/', $Line['text'])) { $Block['closed'] = true; } return $Block; } # # Fenced Code protected function blockFencedCode($Line) { if (preg_match('/^['.$Line['text'][0].']{3,}[ ]*([^`]+)?[ ]*$/', $Line['text'], $matches)) { $Element = array( 'name' => 'code', 'text' => '', ); if (isset($matches[1])) { /** * https://www.w3.org/TR/2011/WD-html5-20110525/elements.html#classes * Every HTML element may have a class attribute specified. * The attribute, if specified, must have a value that is a set * of space-separated tokens representing the various classes * that the element belongs to. * [...] * The space characters, for the purposes of this specification, * are U+0020 SPACE, U+0009 CHARACTER TABULATION (tab), * U+000A LINE FEED (LF), U+000C FORM FEED (FF), and * U+000D CARRIAGE RETURN (CR). */ $language = substr($matches[1], 0, strcspn($matches[1], " \t\n\f\r")); $class = 'language-'.$language; $Element['attributes'] = array( 'class' => $class, ); } $Block = array( 'char' => $Line['text'][0], 'element' => array( 'name' => 'pre', 'handler' => 'element', 'text' => $Element, ), ); return $Block; } } protected function blockFencedCodeContinue($Line, $Block) { if (isset($Block['complete'])) { return; } if (isset($Block['interrupted'])) { $Block['element']['text']['text'] .= "\n"; unset($Block['interrupted']); } if (preg_match('/^'.$Block['char'].'{3,}[ ]*$/', $Line['text'])) { $Block['element']['text']['text'] = substr($Block['element']['text']['text'], 1); $Block['complete'] = true; return $Block; } $Block['element']['text']['text'] .= "\n".$Line['body']; return $Block; } protected function blockFencedCodeComplete($Block) { $text = $Block['element']['text']['text']; $Block['element']['text']['text'] = $text; return $Block; } # # Header protected function blockHeader($Line) { if (isset($Line['text'][1])) { $level = 1; while (isset($Line['text'][$level]) and $Line['text'][$level] === '#') { $level ++; } if ($level > 6) { return; } $text = trim($Line['text'], '# '); $Block = array( 'element' => array( 'name' => 'h' . min(6, $level), 'text' => $text, 'handler' => 'line', ), ); return $Block; } } # # List protected function blockList($Line) { list($name, $pattern) = $Line['text'][0] <= '-' ? array('ul', '[*+-]') : array('ol', '[0-9]+[.]'); if (preg_match('/^('.$pattern.'[ ]+)(.*)/', $Line['text'], $matches)) { $Block = array( 'indent' => $Line['indent'], 'pattern' => $pattern, 'element' => array( 'name' => $name, 'handler' => 'elements', ), ); if($name === 'ol') { $listStart = stristr($matches[0], '.', true); if($listStart !== '1') { $Block['element']['attributes'] = array('start' => $listStart); } } $Block['li'] = array( 'name' => 'li', 'handler' => 'li', 'text' => array( $matches[2], ), ); $Block['element']['text'] []= & $Block['li']; return $Block; } } protected function blockListContinue($Line, array $Block) { if ($Block['indent'] === $Line['indent'] and preg_match('/^'.$Block['pattern'].'(?:[ ]+(.*)|$)/', $Line['text'], $matches)) { if (isset($Block['interrupted'])) { $Block['li']['text'] []= ''; $Block['loose'] = true; unset($Block['interrupted']); } unset($Block['li']); $text = isset($matches[1]) ? $matches[1] : ''; $Block['li'] = array( 'name' => 'li', 'handler' => 'li', 'text' => array( $text, ), ); $Block['element']['text'] []= & $Block['li']; return $Block; } if ($Line['text'][0] === '[' and $this->blockReference($Line)) { return $Block; } if ( ! isset($Block['interrupted'])) { $text = preg_replace('/^[ ]{0,4}/', '', $Line['body']); $Block['li']['text'] []= $text; return $Block; } if ($Line['indent'] > 0) { $Block['li']['text'] []= ''; $text = preg_replace('/^[ ]{0,4}/', '', $Line['body']); $Block['li']['text'] []= $text; unset($Block['interrupted']); return $Block; } } protected function blockListComplete(array $Block) { if (isset($Block['loose'])) { foreach ($Block['element']['text'] as &$li) { if (end($li['text']) !== '') { $li['text'] []= ''; } } } return $Block; } # # Quote protected function blockQuote($Line) { if (preg_match('/^>[ ]?(.*)/', $Line['text'], $matches)) { $Block = array( 'element' => array( 'name' => 'blockquote', 'handler' => 'lines', 'text' => (array) $matches[1], ), ); return $Block; } } protected function blockQuoteContinue($Line, array $Block) { if ($Line['text'][0] === '>' and preg_match('/^>[ ]?(.*)/', $Line['text'], $matches)) { if (isset($Block['interrupted'])) { $Block['element']['text'] []= ''; unset($Block['interrupted']); } $Block['element']['text'] []= $matches[1]; return $Block; } if ( ! isset($Block['interrupted'])) { $Block['element']['text'] []= $Line['text']; return $Block; } } # # Rule protected function blockRule($Line) { if (preg_match('/^(['.$Line['text'][0].'])([ ]*\1){2,}[ ]*$/', $Line['text'])) { $Block = array( 'element' => array( 'name' => 'hr' ), ); return $Block; } } # # Setext protected function blockSetextHeader($Line, array $Block = null) { if ( ! isset($Block) or isset($Block['type']) or isset($Block['interrupted'])) { return; } if (chop($Line['text'], $Line['text'][0]) === '') { $Block['element']['name'] = $Line['text'][0] === '=' ? 'h1' : 'h2'; return $Block; } } # # Markup protected function blockMarkup($Line) { if ($this->markupEscaped or $this->safeMode) { return; } if (preg_match('/^<(\w[\w-]*)(?:[ ]*'.$this->regexHtmlAttribute.')*[ ]*(\/)?>/', $Line['text'], $matches)) { $element = strtolower($matches[1]); if (in_array($element, $this->textLevelElements)) { return; } $Block = array( 'name' => $matches[1], 'depth' => 0, 'markup' => $Line['text'], ); $length = strlen($matches[0]); $remainder = substr($Line['text'], $length); if (trim($remainder) === '') { if (isset($matches[2]) or in_array($matches[1], $this->voidElements)) { $Block['closed'] = true; $Block['void'] = true; } } else { if (isset($matches[2]) or in_array($matches[1], $this->voidElements)) { return; } if (preg_match('/<\/'.$matches[1].'>[ ]*$/i', $remainder)) { $Block['closed'] = true; } } return $Block; } } protected function blockMarkupContinue($Line, array $Block) { if (isset($Block['closed'])) { return; } if (preg_match('/^<'.$Block['name'].'(?:[ ]*'.$this->regexHtmlAttribute.')*[ ]*>/i', $Line['text'])) # open { $Block['depth'] ++; } if (preg_match('/(.*?)<\/'.$Block['name'].'>[ ]*$/i', $Line['text'], $matches)) # close { if ($Block['depth'] > 0) { $Block['depth'] --; } else { $Block['closed'] = true; } } if (isset($Block['interrupted'])) { $Block['markup'] .= "\n"; unset($Block['interrupted']); } $Block['markup'] .= "\n".$Line['body']; return $Block; } # # Reference protected function blockReference($Line) { if (preg_match('/^\[(.+?)\]:[ ]*<?(\S+?)>?(?:[ ]+["\'(](.+)["\')])?[ ]*$/', $Line['text'], $matches)) { $id = strtolower($matches[1]); $Data = array( 'url' => $matches[2], 'title' => null, ); if (isset($matches[3])) { $Data['title'] = $matches[3]; } $this->DefinitionData['Reference'][$id] = $Data; $Block = array( 'hidden' => true, ); return $Block; } } # # Table protected function blockTable($Line, array $Block = null) { if ( ! isset($Block) or isset($Block['type']) or isset($Block['interrupted'])) { return; } if (strpos($Block['element']['text'], '|') !== false and chop($Line['text'], ' -:|') === '') { $alignments = array(); $divider = $Line['text']; $divider = trim($divider); $divider = trim($divider, '|'); $dividerCells = explode('|', $divider); foreach ($dividerCells as $dividerCell) { $dividerCell = trim($dividerCell); if ($dividerCell === '') { continue; } $alignment = null; if ($dividerCell[0] === ':') { $alignment = 'left'; } if (substr($dividerCell, - 1) === ':') { $alignment = $alignment === 'left' ? 'center' : 'right'; } $alignments []= $alignment; } # ~ $HeaderElements = array(); $header = $Block['element']['text']; $header = trim($header); $header = trim($header, '|'); $headerCells = explode('|', $header); foreach ($headerCells as $index => $headerCell) { $headerCell = trim($headerCell); $HeaderElement = array( 'name' => 'th', 'text' => $headerCell, 'handler' => 'line', ); if (isset($alignments[$index])) { $al.........完整代码请登录后点击上方下载按钮下载查看
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