简单的xml处理类.

<?php
header('content-type: text/html; charset=utf-8');
class OpXML
{
    private $fpath;
    private $enter;
    private $root;

    function __construct($root,$fpath)
    {
        $this->fpath=$fpath;
        $this->root=$root;
        $this->enter=chr(13).chr(10);
        $this->checkFile();
    }

    /*
    *函数名:insert
    *说明:插入一条记录
    */
    public function insert($fields)
    {
        $content=$this->getFileContent();
               
        $record='<partners>'.$this->enter;
        foreach($fields as $k=>$v)
        {
            $record.="<$k name=$v></$k>".$this->enter;
        }
        $record.='</partners>'.$this->enter.$this->enter;
        $this->save(preg_replace('/(?=<//'.$this->root.'>)/',$record,$content));
        return true;
    }
    private function checkFile()
    {
        if(!file_exists($this->fpath))
        {
            $xmlstr='';
            $xmlstr='<?xml version="1.0" encoding="UTF-8"?>'.$this->enter;
            $xmlstr.='<'.$this->root.'>'.$this->enter.$this->enter;
            $xmlstr.='</'.$this->root.'>';
            $this->save($xmlstr);
        }
   
    }
    private function getFileContent()
    {
        $hd=fopen($this->fpath,'r');
        $content=fread($hd,filesize($this->fpath));
        fclose($hd);
        return $content;
    }

    private function save($content)
    {
        $hd=fopen($this->fpath,'w');
        fwrite($hd,$content);
        fclose($hd);
    }
}

$rootname='person';//根标签名
$fpath='./12.xml';//文件的路径，不用手动创建文件
$x=new OpXML('person',$fpath);
$name = $_post['children'];
if(!isset($name))$name="yuan";
//从form增加一条记录
$arr=array('partner'=>$name);
$x->insert($arr);

?>