php操作XML、读取数据和写入数据的实现代码

<?xml version="1.0" encoding="utf-8"?> <vip> <id>23</id> <username>开心的路飞</username> <sex>男</sex> <face>face/43.jpg</face> <email>123@qq.com</email> <qq>1212121212</qq> </vip>

/* * _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>(.*)<//vip>/', $_xml,$_dom);        foreach($_dom[1] as $_value){      preg_match_all('/<id>(.*)<//id>/', $_value,$_id);      preg_match_all('/<username>(.*)<//username>/', $_value,$_username);      preg_match_all('/<sex>(.*)<//sex>/', $_value,$_sex);      preg_match_all('/<face>(.*)<//face>/', $_value,$_face);      preg_match_all('/<email>(.*)<//email>/', $_value,$_email);      preg_match_all('/<qq>(.*)<//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;}

/* * _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);  $_string = "<?xml version=/"1.0/" encoding=/"utf-8/"?>/r/t";  fwrite($_fp, $_string,strlen($_string));  $_string = "<vip>/r/t";  fwrite($_fp, $_string,strlen($_string));  $_string = "/t<id>{$_clean['id']}</id>/r/t";  fwrite($_fp, $_string,strlen($_string));  $_string = "/t<username>{$_clean['username']}</username>/r/t";  fwrite($_fp, $_string,strlen($_string));  $_string = "/t<sex>{$_clean['sex']}</sex>/r/t";  fwrite($_fp, $_string,strlen($_string));  $_string = "/t<face>{$_clean['face']}</face>/r/t";  fwrite($_fp, $_string,strlen($_string));  $_string = "/t<email>{$_clean['email']}</email>/r/t";  fwrite($_fp, $_string,strlen($_string));  $_string = "/t<qq>{$_clean['url']}</qq>/r/t";  fwrite($_fp, $_string,strlen($_string));  $_string = "</vip>";  fwrite($_fp, $_string,strlen($_string));  flock($_fp,LOCK_UN);  fclose($_fp);}