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 | <?php
 
 
 
 
 
 
 
 
 
 require_once './Markdown1.0.2/markdown.php';
 
 
 define('PAGEDIR', dirname(__FILE__) . '/pages');
 
 
 $page = isset($_GET['page']) ? $_GET['page'] : 'Home';
 
 
 
 if(isset($_GET['edit'])){
 pageHeader($page);
 edit($page);
 pageFooter($page,false);
 }else if(isset($_POST['edit'])){
 file_put_contents(pageToFile($_POST['page']), $_POST['contents']);
 
 
 header('Location:http://' . $_SERVER['HTTP_HOST'] . $_SERVER['SCRIPT_NAME']
 . '?page=' . urlencode($_POST['page']));
 
 exit;
 }else{
 pageHeader($page);
 
 
 if( is_readable(pageToFile($page)) ){
 
 $text = file_get_contents(pageToFile($page));
 
 
 $text = MarkDown($text);
 
 
 $text = wikiLinks($text);
 
 
 echo $text;
 
 
 pageFooter($page, true);
 }else{
 
 edit($page, true);
 pageFooter($page, false);
 
 }
 
 }
 
 
 function pageHeader($page){
 ?>
 <html>
 <head>
 <title>Wiki:<?php echo htmlentities($page) ?></title>
 </head>
 <body>
 <h1><?php echo htmlentities($page) ?></h1>
 <hr>
 <?php
 }
 
 
 
 function pageFooter($page, $displayEditLink){
 $timestamp = @filemtime(pageToFile($page));
 
 if($timestamp){
 $lastModified = strftime('%c', $timestamp);
 }else{
 $lastModifed = 'Never';
 }
 
 if($displayEditLink){
 $editLink = ' - <a href="?page=' . urlencode($page)
 . '&edit=true">Edit</a>';
 }else{
 $editLink = '';
 }
 ?>
 <hr/>
 <em>Last Modified:<?php echo $lastModified; ?> </em>
 <?php echo $editLink; ?>
 - <a href="<?php echo $_SERVER['SCRIPT_NAME']; ?>">Home</a>
 </body>
 </html>
 <?php
 }
 
 
 function edit($page, $isNew = false){
 if ($isNew) {
 $contents = '';
 ?>
 <p>
 <b>
 This page doesn't exit yet.
 </b>
 To create it, enter its contents below and click the
 <b>
 Save
 </b>
 button.
 </p>
 <?php
 } else {
 $contents = file_get_contents(pageToFile($page));
 }
 ?>
 <form method="post" action="<?php echo htmlentities($_SERVER['SCRIPT_NAME']);?>">
 <input type="hidden" name="edit" value="true" />
 <input type="hidden" name="page" value="<?php echo htmlentities($page); ?>" />
 <textarea name="contents" rows="20" cols="60">
 <?php echo htmlentities($contents);?>
 </textarea>
 
 <br />
 <input type="submit" value="Save" />
 </form>
 <?php
 }
 
 // 将提交的页眉转换为一个文件名,使用md5()函数避免$page中的淘气字符可能导致的安全问题
 function pageTofile($page){
 return PAGEDIR . '/' . md5($page);
 }
 
 //把页面中诸如 [something] 之类的文本转化成 Wikeyem页面中"something"这样的HTML链接
 function wikiLinks($page){
 if ( @preg_match_all('/\[([^\]]+?]/', $page, $matches, PREG_SET_ORDER) ){
 foreach($matches as $match){
 $page = str_replace(
 $match[0],
 '<a href="' . $_SERVER['SCRIPT_NAME']
 . '?page' . urlencode($match[1]) . '">'
 . htmlentities($match[1]) . '</a>',
 $page
 );
 }
 }
 
 return $page;
 }
 
 
 | 
PHP Markdown扩展库
[file]https://littoral.michelf.ca/code/php-markdown/php-markdown-1.0.2.zip[/file]