php操作XML、读取数据和写入数据的实现代码

xml文件

 

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php解析XML获取标签中的值

/*
 * _get_xml 获取的XML文件
* @access public 表示函数对外公开
* @param $_xmlfile xml文件
* $_html 从XML中取出的数据数组
* */
function _get_xml($_xmlfile){
  $_html = array();
  if(file_exists($_xmlfile)){
    $_xml = file_get_contents($_xmlfile);
    preg_match_all('/(.*)<\/vip>/', $_xml,$_dom);    
    foreach($_dom[1] as $_value){
      preg_match_all('/(.*)<\/id>/', $_value,$_id);
      preg_match_all('/(.*)<\/username>/', $_value,$_username);
      preg_match_all('/(.*)<\/sex>/', $_value,$_sex);
      preg_match_all('/(.*)<\/face>/', $_value,$_face);
      preg_match_all('/(.*)<\/email>/', $_value,$_email);
      preg_match_all('/(.*)<\/qq>/', $_value,$_qq);
      $_html['id'] = $_id[1][0];
      $_html['username'] = $_username[1][0];
      $_html['sex'] = $_sex[1][0];
      $_html['face'] = $_face[1][0];
      $_html['email'] = $_email[1][0];
      $_html['qq'] = $_qq[1][0];
    }
  }else{
    _alert_back("文件不存在");
  }
  return $_html;
}

php向XML文件中写入数据

/*
 * _set_xml将信息写入XML文件
* @access public 表示函数对外公开
* @param $_xmlfile xml文件
* @param $_clean 要写入的信息的数组
* */
function _set_xml($_xmlfile,$_clean){
  $_fp = @fopen('newuser.xml','w');
  if(!$_fp){
    exit('系统错误，文件不存在！');
  }
  flock($_fp,LOCK_EX);
  $_string = "\r\t";
  fwrite($_fp, $_string,strlen($_string));
  $_string = "\r\t";
  fwrite($_fp, $_string,strlen($_string));
  $_string = "\t{$_clean['id']}\r\t";
  fwrite($_fp, $_string,strlen($_string));
  $_string = "\t{$_clean['username']}\r\t";
  fwrite($_fp, $_string,strlen($_string));
  $_string = "\t{$_clean['sex']}\r\t";
  fwrite($_fp, $_string,strlen($_string));
  $_string = "\t{$_clean['face']}\r\t";
  fwrite($_fp, $_string,strlen($_string));
  $_string = "\t{$_clean['email']}\r\t";
  fwrite($_fp, $_string,strlen($_string));
  $_string = "\t{$_clean['url']}\r\t";
  fwrite($_fp, $_string,strlen($_string));
  $_string = "";
  fwrite($_fp, $_string,strlen($_string));
  flock($_fp,LOCK_UN);
  fclose($_fp);
}