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phpxml留言板xml存储数据的简单例子_php实例

时间：2021-07-01 10:21:17 帮助过：5人阅读

类文件 : _class.xmldb.inc.php
代码如下:

class xmldb extends DOMDocument{ 
    var $xmldb; 
    public function __construct($xmldbname){ 
        $this->xmldb=$xmldbname; 
        if(!file_exists($this->xmldb)){ 
            $initxmldb = ""; 
            $this->loadXML($initxmldb); 
            $this->save($this->xmldb); 
        }else{ 
            $this->load($this->xmldb); 
        } 

    } 
    public function insert_message($nickname,$message){ 

        $messagedom = $this->getElementsByTagName("Message"); 
        $subnode = $this->createElement("Rows"); 
        $nicknamenode = $this->createElement("Nickname"); 
        $nicknamenode -> appendChild($this->createTextNode($nickname)); 
        $subnode -> appendChild($nicknamenode); 
        $contentnode = $this->createElement("Content"); 
        $contentnode -> appendChild($this->createTextNode($message)); 
        $subnode -> appendChild($contentnode); 
        $timernode = $this->createElement("Timer"); 
        $timernode -> appendChild($this->createTextNode(time())); 
        $subnode -> appendChild($timernode); 
        $messagedom->item(0)->appendChild($subnode); 
        $this->saveXML(); 
        $this->save($this->xmldb); 
    } 
    function get_node_length($nodename){ 

        $odom = $this->getElementsByTagName($nodename); 
        return $odom->length; 
    } 
    public function get_message_list($start,$rowscount,$pagesize){ 
        $end = $rowscount > $pagesize ? $start+$pagesize : $rowscount; 

        $k = 0; 
        for($i = $start; $i < $end; $i++){ 
            $rowslist[$k]["Nickname"] = $this->getElementsByTagName("Nickname")->item($i)->nodeValue; 
            $rowslist[$k]["Content"] = $this->getElementsByTagName("Content")->item($i)->nodeValue; 
            $rowslist[$k]["Timer"] = $this->getElementsByTagName("Timer")->item($i)->nodeValue; 
            $k++; 
        } 
        return $rowslist; 
    } 
    public static function splitpage($pageall,$page=1,$urled=null,$strpage = "page",$pageaverage = 10){ 
            $pageaverage -= 1; 
            $page = intval($page >=1 ? $page : 1 ); 
            $page = $page > $pageall ? $pageall : $page; 
            $startpage = $page - $pageaverage > 0 ? $page - ceil(($pageaverage / 2)):1; 
            $startpage = ($page + ceil($pageaverage/2) > $pageall)?$pageall-$pageaverage:$startpage; 

            $startpage = $startpage > 0 ? $startpage : 1; 
            $stoppage = $startpage+$pageaverage >$pageall?$pageall:$startpage+$pageaverage; 
            if(empty($urlfile)){ $urlfile=$_SERVER["PHP_SELF"]; } 
            if(!strrpos($urlfile,'?')) $urled .= '?'; 
            foreach($_GET as $k => $v) 
            { 
                $urled = ($k<>$strpage) ? $urled.$k.'='.urlencode($v).'&' : $urled; 
            } 
            if ($page>1){ 
                $mess ="首页 "; 
                $mess .="上一页 "; 
            }else{ 
                $mess ="首页 "; 
                $mess .="上一页 "; 
            } 
            if($page > 9){ 
                $startpage = $page - 9; 
            } 
            $stoppage = $startpage + 9 >= $pageall ? $pageall : $startpage + 9; 
            for($i= $startpage; $i<= $stoppage ;$i++) 
            { 
                if($i<= $pageall && !($page==$i)) 
                    $mess .= "".$i." "; 
                else 
                    $mess .= "".$i." "; 
            } 
            if ($page < $pageall){ 
                $mess .=" 下一页"; 
                $mess .=" 尾页"; 
            }else{ 
                $mess .=" 下一页"; 
                $mess .=" 尾页"; 
            } 
        return $mess; 
    } 
} 
?> 
 
调用文件 : index.php 
 代码如下:

require("_class.xmldb.inc.php"); 
$xmldb = new xmldb("./my_xmldb.xml"); 
if(isset($_POST["btnform1"])){ 
    $xmldb -> insert_message($_POST["nickname"],$_POST["content"]); 
} 
$pagesize        = 3; 
$page            = !empty($_GET['page']) ? intval($_GET['page']) : 1; 
$rowscount        = $xmldb -> get_node_length("Rows"); 
$pagecount        = ceil($rowscount/$pagesize); 
$start            = ($page-1)*$pagesize > $rowscount ? $rowscount : ($page-1)*$pagesize; 
$rowslist = $xmldb -> get_message_list($start,$rowscount,$pagesize); 
?> 
 
 
 
 
 New Document  
     
 
 
     
            if(!empty($rowslist)) 
        { 
            foreach($rowslist as $key => $value) 
            { 
                echo "
  • ".$value["Nickname"]." (".date("Y-m-d H:i",$value["Timer"]).")
    • "; 
                    echo "
  • ".$value["Content"]."

"; 
            } 
        } 
    ?> 
         splitpage($pagecount,$page,'','page',$pagesize)?> 
     
     
        
 
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