php操作XML，读取数据和写入数据的方法

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xml文件

<?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>

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>(.*)<\/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;}

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);    $_string = "<?xml version=\"1.0\" encoding=\"utf-8\"?>\r\t";    fwrite($_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);}

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