php开发文章发布示例(正则表达式实例开发)

存档：

post.php

 <form method="post" action="viewthread.php" target="_blank">
     <h2 align="center">发表文章实例开发</h2>
     <div style="width:200;float:left">
         <h5>选项</h5>
         <ul style="list-style:none;margin:0px;padding:0px">
             <li><input type="checkbox" name="parse[]" value="1">删除HTML标签</li>
             <li><input type="checkbox" name="parse[]" value="2">转换HTML标签为实体</li>
             <li><input type="checkbox" name="parse[]" value="3">使用UBB代码</li>
             <li><input type="checkbox" name="parse[]" value="4">开启URL识别</li>
             <li title="可用的表情:
                                 【:),/wx,微笑】【:@,/fn,发怒】
                                 【:kiss,/kill,/sa,示爱】
                                 【:p,/tx,偷笑】【:q,/dk,大哭】">
                 <input type="checkbox" name="parse[]" value="5">使用表情</li>
             <li><input type="checkbox" name="parse[]" value="6">禁用非法关键字</li>
             <li><input type="checkbox" name="parse[]" value="7">PHP代码设为高亮</li>
             <li><input type="checkbox" name="parse[]" value="8">原样显示</li>
             <li><input type="checkbox" name="parse[]" value="9">同步换行</li>
         </ul>
     </div>
     <div style="width:300;float:left">
         <h5>标题<input type="text" name="subject" size=50></h5>
         <h5>内容<textarea rows="7" cols="50" name="message"></textarea></h5>
         <input type="submit" name="replysubmit" value="发表帖子">
     </div>
 </form>

viewthread.php

 <?php
     require "article.class.php";
     $article = new Article($_POST["subject"],$_POST["message"],$_POST["parse"]);
     echo $article->getSubject();
     echo "<hr>";
     echo $article->getMessage();
 ?>

article.class.php

 <?php
     class Article{
         private $subject;
         private $message;
         function __construct($subject="",$message="",$parse=array()){
             $this->subject = $this->html2Text($subject);
             if(!empty($parse)){
                 foreach($parse as $value){
                     switch($value){
                         case 1:
                             $message = $this->delHtmlTags($message);
                             break;
                         case 2:
                             $message = $this->html2Text($message);
                             break;
                         case 3:
                             $message = $this->UBBCode2Html($message);
                             break;
                         case 4:
                             $message = $this->parseURL($message);
                             break;
                         case 5:
                             $message = $this->parseSmilies($message);
                             break;
                         case 6:
                             $message = $this->disableKeyWords($message);
                             break;
                         case 7:
                             $message = $this->prasePHPCode($message);
                             break;
                         case 8:
                             $message = $this->prasePer($message);
                             break;
                         case 9:
                             $message = $this->nltobr($message);
                             break;
                     }
                 }
             }
             $this->message = $message;
         }

         private function delHtmlTags($message){
             return strip_tags($message);
         }

         private function html2Text($message){
             return htmlspecialchars(stripslashes($message));
         }

         private function UBBCode2Html($message){
             $pattern = array(
                 '/\[b\]/i','/\[\/b\]/i','/\[i\]/i',
                 '/\[\/i\]/i','/\[u\]/i','/\[\/u\]/i',
                 '/\[font=([^\[\<]+?)\]/i',
                 '/\[color=([#\w]+?)\]/i',
                 '/\[size=(\d+?)\]/i',
                 '/\[size=(\d+(\.\d+)?(px|pt|in|cm|mm|pc|em|ex|%)+?)\]/i',
                 '/\[align=(left|center|right)\]/i',
                 '/\[url=www.([^\["\']+?)\](.+?)\[\/url\]/is',
                 '/\[url=(https?|ftp|gopher|news|telnet){1}:\/\/([^\["\']+?)\](.+?)\[\/url]/is',
                 '/\[email\]\s*([a-z0-9\-_.+]+)@([a-z0-9\-_.]+)\s*\[\/email\]/i',
                 '/\[email=([a-z0-9\-_.+]+)@([a-z0-9\-_]+[.][a-z0-9\-_.]+)\](.+?)\[\/email\]/is',
                 '/\[img\](.+?)\[\/img\]/',
                 '/\[\/color\]/i',
                 '/\[\/size\]/i',
                 '/\[\/font\]/i',
                 '/\[\/align\]/'
             );

             $replace = array(
                 '<b>','</b>','<i>',
                 '</i>','<u>','</u>',
                 '<font face="\\1">',
                 '<font color="\\1">',
                 '<font size="\\1">',
                 '<font style=\"font-size:\\1\">',
                 '<p align="\\1">',
                 '<a href="http://www.\\1" target="_blank">\\2</a>',
                 '<a href="\\1://\\2" target="_blank">\\3</a>',
                 '<a href="mailto:\\1@\\2">\\1@\\2</a>',
                 '<a href="mailto:\\1@\\2">\\3</a>',
                 '<img src="\\1">',
                 '</font>','</font>','</font>','</p>'
             );
             return preg_replace($pattern,$replace,$message);
         }

         private function cuturl($url){
             $length = 65;
             $url = substr(strtolower($url),0,4) == 'www.'?"http://$url":$url;
             $urllink = "<a href=\"".$url.'"target="_blank">';
             if(strlen($url)>$length){
                 $url = substr($url,0,intval($length*0.5)).'...'.substr($url,-intval($length*0.3));
             }
             $urllink .=$url.'</a>';
             return $urllink;
         }

         private function parseURL($message){
             $urlPattern = "/(www.|https?:\/\/|ftp:\/\/|news:\/\/|telnet:\/\/){1}([^\[\"']+?)(com|net|org)(\/[\w-\.\/?\%\&\=]*)?/ei";
             return preg_replace($urlPattern,"\$this->cuturl('\\1\\2\\3\\4')",$message);
         }

         private function parseSmilies($message){
             $pattern = array(
                 '/:\)|\/wx|微笑/i',
                 '/:@|\/fn|发怒/i',
                 '/:kiss|\/kill|\/sa|示爱/',
                 '/:p|\/tx|偷笑/i',
                 '/:q|\/dk|大哭/i'
             );
             $replace = array(
                 '<img src="smilies/smile.png" alt="微笑">',
                 '<img src="smilies/huffy.png" alt="发怒">',
                 '<img src="smilies/kiss.png" alt="示爱">',
                 '<img src="smilies/titter.png" alt="偷笑">',
                 '<img src="smilies/cry.png" alt="大哭">'
             );
             return preg_replace($pattern,$replace,$message);
         }

         private function disableKeyWords($message){
             $keywords_disable = array("非法关键字一","非法关键字二","非法关键字三");
             return str_replace($keywords_disable,"**",$message);
         }

         private function prasePHPCode($message){
             $pattern = '/(<\?.*?\?>)/ise';
             $replace = '"<pre style=\"background:#ddd\">".highlight_string("\\1",true)."</pre>"';
             return preg_replace($pattern,$replace,$message);
         }

         private function prasePer($message){
             return '<pre>'.$message.'</pre>';
         }

         private function nltobr($message){
             return nl2br($message);
         }

         public function getSubject(){
             return '<h1 align=center>'.$this->subject.'</h1>';
         }

         public function getMessage(){
             return $this->message;
         }
     }
 ?>

结果如下：