XML操作类(正则版)

在网上没找到合适的操作XML的类，PHP又对DOM、XPATH支持不好，但又需要用到，于是自己写了一个，提供增删改查功能，可以当做小型的数据库使



/*

*作者:pangmen

*日期:2007-11-14

*功能:操作XML文件(增、删、改、查)

*版本:正则版

*附:大家可以随意修改此类，合适的话发我一份:)

*   我的E-mail:[e-mail]

*/



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();

                preg_match_all('|(\d+?)<\/key>|',$content,$matches);

                rsort($matches[1]);

                $newkey=$matches[1][0]+1;

                

                $record=''.$this->enter;

                $record.=''.$newkey.''.$this->enter;

                foreach($fields as $k=>$v)

                {

                        $record.="<$k>$v".$this->enter;

                }

                $record.=''.$this->enter.$this->enter;

                $this->save(preg_replace('/(?=<\/'.$this->root.'>)/',$record,$content));

                return true;

        }



/*

    *函数名:insertM

    *说明:插入多条记录，参数类型必须是二维数组

    */

    public function insertM($arr)

    {

        $content=$this->getFileContent();

        preg_match_all('|(\d+?)<\/key>|',$content,$matches);

        rsort($matches[1]);

        $newkey=$matches[1][0]+1;

        

        $record='';

        for($i=0;$i<count($arr);$i++)

        {

            $record.=''.$this->enter;

            $record.=''.$newkey.''.$this->enter;

            foreach($arr[$i] as $k=>$v)

            {

                $record.="<$k>$v".$this->enter;

            }

            $record.=''.$this->enter.$this->enter;

            $newkey++;

        }

        $this->save(preg_replace('/(?=<\/'.$this->root.'>)/',$record,$content));

        return true;

    }



        /*

        *函数名:checkFile

        *说明:如果文件不存在，则创建之，并初始化

        *     否则检查文件规则是否被破坏

        */

        private function checkFile()

        {

                if(!file_exists($this->fpath))

                {

                        $xmlstr='';

                        $xmlstr=''.$this->enter;

                        $xmlstr.='<'.$this->root.'>'.$this->enter.$this->enter;

                        $xmlstr.='.$this->root.'>';

                        $this->save($xmlstr);

                }

                else

                {

                        $content=$this->getFileContent();

                        $bool_statement=preg_match('/<\?xml version="1\.0".*?\?>/',$content)==0 ? false : true;

                        $bool_root=preg_match('/<'.$this->root.'>.*<\/'.$this->root.'>/s',$content)==0 ? false : true;



                        preg_match_all('|((?:.+?)<\/record>)|s',$content,$matches);

                        for($i=0;$i<count($matches[1]);$i++)

                        {

                                $re='/^\s*(\d+)<\/key>\s*[\s\S]*\s*<\/record>$/';

                                $bool_record=preg_match($re,$matches[1][$i],$arr)==0 ? false : true;

                                $keys[]=$arr[1];

                                if(!$bool_record) break;

                        }

                        rsort($keys);

                        $bool_repeat=preg_match('/(\d),\1/',join(',',$keys),$wb)==0 ? true : false;



                        if(!($bool_statement && $bool_root && $bool_record && $bool_repeat))

                        {

                                echo '文件规则已被破坏';

                                exit;

                        }

                }

        }



        /*

        *函数名:getRecordById

        *说明:根据主键ID，获取字段信息

        */

        public function getRecordById($id)

        {

                $content=$this->getFileContent();

                preg_match('/(\s*'.$id.'<\/key>.+?)<\/record>/s',$content,$matches);

                preg_match_all('|(<.+)|',$matches[1],$arr);

                $arrstr='';

                for($i=0;$i<count($arr[1]);$i++)

                {

                        preg_match('/^.+>(.+)<\/(.+)>/',$arr[1][$i],$farr);

                        $arrstr.="'$farr[2]'=>'$farr[1]'";

                        if($i<count($arr[1])-1) $arrstr.=',';

                }

                eval("\$row=array($arrstr);");

                return $row;

        }



        /*

        *函数名:checkFile

        *说明:根据主键ID，更新字段

        */

        public function updateRecordById($id,$form_arr=array())

        {

                $content=$this->getFileContent();

                foreach($form_arr as $k=>$v)

                {

                        $re='/('.$id.'<\/key>[\s\S]*?<'.$k.'>).+?(<\/'.$k.'>)/s';

                        $content=preg_replace($re,'${1}'.$v.'$2',$content);

                }

                $this->save($content);

                return true;

        }



        public function deleteRecordById($id)

        {

                $content=$this->getFileContent();

                $content=preg_replace('/\s*'.$id.'+.+?<\/record>(\s{4})?/s','',$content);

                $this->save($content);

        }



        /*

        *函数名:getList

        *说明:获取所有记录，返回一个二维数组

        *     先获取所有record记录，再获取字段名和值

        */

        public function getList()

        {

                $content=$this->getFileContent();

                $rs=array();

                preg_match_all('|(.+?)<\/record>|s',$content,$matches);

                for($i=0;$i<count($matches[1]);$i++)

                {

                        preg_match_all('|(<.+)|',$matches[1][$i],$tmparr);

                        $arrstr='';

                        for($j=0;$j<count($tmparr[1]);$j++)

                        {

                                preg_match('/^.+>(.+)<\/(.+)>/',$tmparr[1][$j],$farr);

                                $arrstr.="'$farr[2]'=>'$farr[1]'";

                                if($j<count($tmparr[1])-1) $arrstr.=',';

                        }

                        eval("\$rs[]=array($arrstr);");

                }

                return $rs;

        }



        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);

        }

}

?>



复制代码



header('content-type: text/html; charset=utf-8');



include('./libs/x.class.php');



$rootname='ROOT';//根标签名

$fpath='./libs/ooooooooooooooo.xml';//文件的路径，不用手动创建文件

$x=new OpXML('ROOT',$fpath);



//增

$arr=array('username'=>'pangmen','sex'=>'男','tel'=>'139999999','address'=>'北京');

$x->insert($arr);



//删

//$x->deleteRecordById(1);



//改

//$arr=array('username'=>'pangmen','sex'=>'男','tel'=>'139999999','address'=>'北京');

//$x->updateRecordById(1,$arr);



//查(一条记录)

//print_r($x->getRecordById(1));



//查(所有记录)

//print_r($x->getList());

?>