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 |
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// +----------------------------------------------------------------------+
// | Authors: Christian Stocker |
// +----------------------------------------------------------------------+
//
// $Id: sql2xml.php,v 1.59 2001/11/13 10:54:02 chregu Exp $
/**
* This class takes a PEAR::DB-Result Object, a sql-query-string or an array
* and returns a xml-representation of it.
*