把从SQL中取出的数据转化成XMl格式

使用了php的PEAR和DB
// +----------------------------------------------------------------------+
// | PHP version 4.0                                                      
|// +----------------------------------------------------------------------+
// | Copyright (c) 1997, 1998, 1999, 2000, 2001 The PHP Group             
|// +----------------------------------------------------------------------+
// | This source file is subject to version 2.0 of the PHP license,       
|// | that is bundled with this package in the file LICENSE, and is        
|// | available at through the world-wide-web at                           
|// | http://www.php.net/license/2_02.txt.                                 
|// | If you did not receive a copy of the PHP license and are unable to   
|// | obtain it through the world-wide-web, please send a note to          
|// | license@php.net so we can mail you a copy immediately.               
|// +----------------------------------------------------------------------+
// | Authors: Christian Stocker                          
|// +----------------------------------------------------------------------+
//
// $Id: sql2xml.php,v 1.59 2001/11/13 10:54:02 chregu Exp $


class XML_sql2xml {

    
    var $nested = True;

    
    var $tagNameResult = "result";

    
    var $tagNameRow = "row";

    
    var $db = Null;


    
    var $user_options = array();


    
    var $xmldoc;


    
    var $xmlroot;


    
    var $user_tableInfo = array();

    
    var $encoding_from  = "ISO-8859-1";

    
    var $encoding_to = "gb2312";

    var $tagname = "tagname";

    
    function XML_sql2xml ($dsn = Null, $root = "root") {

        // if it's a string, then it must be a dsn-identifier;

        if (is_string($dsn))
        {
            include_once ("DB.php");
            $this->db = DB::Connect($dsn);
            if (DB::isError($this->db))
            {
                print "The given dsn for XML_sql2xml was not valid in file ".__FILE__." at line ".__LINE__."
n";
                return new DB_Error($this->db->code,PEAR_ERROR_DIE);
            }

        }

        elseif (is_object($dsn) && DB::isError($dsn))
        {
            print "The given param for XML_sql2xml was not valid in file ".__FILE__." at line ".__LINE__."
n";
            return new DB_Error($dsn->code,PEAR_ERROR_DIE);
        }

        // if parent class is db_common, then it's already a connected identifier
        elseif (get_parent_class($dsn) == "db_common")
        {
            $this->db = $dsn;
        }

        $this->xmldoc = domxml_new_xmldoc('1.0');

        //oehm, seems not to work, unfortunately.... does anybody know a solution?
        $this->xmldoc->encoding = $this->encoding_to;        

        if ($root) {
            $this->xmlroot = $this->xmldoc->add_root($root);
            //PHP 4.0.6 had $root->name as tagname, check for that here...
            if (!isset($this->xmlroot->{$this->tagname}))
            {
                $this->tagname = "name";
            }
        }

    }

    
    function add ($resultset, $params = Null)
    {

        // if string, then it's a query, a xml-file or a xml-string...
        if (is_string($resultset)) {
            if (preg_match("/.xml$/",$resultset)) {
                $this->AddXmlFile($resultset,$params);
            }
            elseif (preg_match("/.*select.*from.*/i" ,  $resultset)) {
                $this->AddSql($resultset);
            }
            else {
                $this->AddXmlString($resultset);
            }

        }
        // if array, then it's an array...
        elseif (is_array($resultset)) {
            $this->AddArray($resultset);
        }

        if (get_class($resultset) == "db_result") {
            $this->AddResult($resultset);
        }
    }

    

    function addXmlFile($file,$xpath = Null)
    {
        $fd = fopen( $file, "r" );
        $content = fread( $fd, filesize( $file ) );
        fclose( $fd );
        $this->doXmlString2Xml($content,$xpath);
    }