<? class Message_XML extends DomDocument{//Message_XML类，继承PHP5的DomDocument类 private $Root;//属性 //方法 public function __construct(){//构造函数 parent:: __construct(); if (!file_exists("message.xml")){//创建或读取存储留言信息的XML文档message.xml $xmlstr = "<?xml version='1.0' encoding='UTF-8'?><message></message>"; $this->loadXML($xmlstr); $this->save("message.xml"); } else $this->load("message.xml"); } //增加留言 public function add_message($Subject,$Content,$Poster){//标题，内容, 发布人 $Root = $this->documentElement; //获取留言消息 $AutoID =date("Ynjhis");//年月日时分秒 $Node_AutoID= $this->createElement("autoid"); $text= $this->createTextNode($AutoID); $Node_AutoID->appendChild($text); $Node_Subject = $this->createElement("subject"); $text = $this->createTextNode($Subject); $Node_Subject->appendChild($text); $Node_Content = $this->createElement("content"); $text= $this->createTextNode($Content); $Node_Content->appendChild($text); $Node_Poster = $this->createElement("poster"); $text = $this->createTextNode($Poster); $Node_Poster->appendChild($text); //建立一条留言记录 $Node_Record = $this->createElement("record"); $Node_Record->appendChild($Node_AutoID); $Node_Record->appendChild($Node_Subject); $Node_Record->appendChild($Node_Content); $Node_Record->appendChild($Node_Poster); //加入到根结点下 $Root->appendChild($Node_Record); $this->save("message.xml"); echo "<script>alert('添加成功');location.href='".$_SERVER['PHP_SELF']."'</script>"; }
//删除留言 public function delete_message($AutoID){//根据ID删除 $Root = $this->documentElement; //查询用户选择删除的留言记录 $xpath = new DOMXPath($this); $Node_Record= $xpath->query("//record[autoid=$AutoID]"); $Root->removeChild($Node_Record->item(0)); $this->save("message.xml"); echo "<script>alert('删除成功');location.href='".$_SERVER['PHP_SELF']."'</script>"; }
//显示留言 public function show_message(){ $Root = $this->documentElement; $xpath = new DOMXPath($this); //查询所有的留言记录 $Node_Record = $this->getElementsByTagName("record"); $Node_Record_Length =$Node_Record->length; //循环输出其留言标题和内容信息 for($i=0;$i<$Node_Record->length;$i++){ $K=0; foreach ($Node_Record->item($i)->childNodes as $articles){ $Field[$K]=$articles->textContent; $K++; } print "<li>"; print "<b>留言标题：</b>$Field[1] <b>发布人：</b>$Field[3]<br><b>留言内容：</b><br>$Field[2] <div align=right><a href='?Action=update_message&AutoID=$Field[0]'>编辑</a> <a href='?Action=delete_message&AutoID=$Field[0]'>删除</a></div>/n"; print "</li>"; } }
//修改留言 public function update_message($AutoID){//根据ID修改 $Root = $this->documentElement; $xpath = new DOMXPath($this); $Node_Record = $xpath->query("//record[autoid=$AutoID]"); $K=0; foreach ($Node_Record->item(0)->childNodes as $articles){ $Field[$K]=$articles->textContent;//元素的内容 $K++; } print "<form method='post' action='?Action=save_message&AutoID=$AutoID'>"; print "<li>留言标题：<input type=text name='Subject' value='$Field[1]' size=20></li>"; print "<li>留言内容：<textarea name='Content' cols=50 rows=5>$Field[2]</textarea></li>"; print "<li>发布人：<input type=text name='Poster' value='$Field[3]' size=20></li>"; print "<li><input type='submit' value='修改留言'></li></form>"; } //保存留言 public function save_message($AutoID,$Subject,$Content,$Poster){//ID,标题，内容, 发布人 $Root = $this->documentElement; //查询待修改的记录 $xpath = new DOMXPath($this); $Node_Record = $xpath->query("//record[autoid=$AutoID]"); $Replace[0]=$AutoID; $Replace[1]=$Subject; $Replace[2]=$Content; $Replace[3]=$Poster; $K=0; //修改 foreach ($Node_Record->item(0)->childNodes as $articles){ $Node_newText = $this->createTextNode($Replace[$K]); $articles->replaceChild($Node_newText,$articles->lastChild);//***************有点疑问 $K++; } echo "<script>alert('修改成功');location.href='".$_SERVER['PHP_SELF']."'</script>"; $this->save("message.xml"); } //上传留言信息 public function post_message(){ print "<form method='post' action='?Action=add_message'>"; print "<li>留言标题：<input type=text name='Subject' size=20></li>"; print "<li>留言内容：<textarea name='Content' cols=50 rows=5></textarea></li>"; print "<li>发布人：<input type=text name='Poster' size=20></li>"; print "<li><input type='submit' value='添加留言'></li></form>"; } }//class end ?> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>PHP+XML留言板</title> <style type="text/css"> #box{width:980px;magin:0 auto} #box ul{list-style:none;padding:0;margin:0;margin-bottom:20px} #box ul li{list-style:none;padding:0;margin:0;margin-bottom:5px} </style> </head> <body> <div id="box"> <h3><strong>PHP+XML留言板</strong></h3> <ul><a href=?Action=post_message>发表留言</a> <a href=?Action=show_message>显示留言</a></ul> <ul> <?php //使用Message_XML类完成留言板 $HawkXML = new Message_XML;//创建一个实例 $Action =""; if(isset($_GET['Action'])) $Action = $_GET['Action']; switch($Action){ case "show_message": //查看 $HawkXML->show_message(); break; case "post_message"://提交 $HawkXML->post_message(); break; case "add_message"://增加 $HawkXML->add_message($_POST['Subject'],$_POST['Content'],$_POST['Poster']); break; case "delete_message"://删除 $HawkXML->delete_message($_GET["AutoID"]); break; case "update_message"://修改 $HawkXML->update_message($_GET["AutoID"]); break; case "save_message"://保存 $HawkXML->save_message($_GET["AutoID"],$_POST['Subject'],$_POST['Content'],$_POST['Poster']); break; default://默认查看 $HawkXML->show_message(); break; } ?> </ul> </div> </body> </html>