php试用smarty和ADODB实现对数据分页读取

<?php 
define('BASE_PATH',$_SERVER['DOCUMENT_ROOT']); 
define('SMARTY_PATH','\smartTest\Smarty\\'); 
require BASE_PATH.SMARTY_PATH.'Smarty.class.php'; 
/*$dir2的这种路径显示到表现页是这下面字符串是一样，导致smarty找不到templates路径*/ 
//$dir2 = "../Smarty/tempplates/"; 
class SmartyProject extends Smarty{ 
     
    function SmartyProject(){ 
        /*必须加这个parent::__construct();，否则，Smarty不会被构造，truncate等不能用，
         * 但这似乎没有道理，但事实上，
         * 这么做确实解决了truncate不能使用的问题*/ 
        parent::__construct(); 
        $this->template_dir = BASE_PATH.SMARTY_PATH.'/templates/'; 
        $this->compile_dir = BASE_PATH.SMARTY_PATH.'/templates_c/'; 
        $this->config_dir = BASE_PATH.SMARTY_PATH.'/configs/'; 
        $this->cache_dir = BASE_PATH.SMARTY_PATH.'/cache/'; 
    } 
} 
 
class ConnDB{ 
    var $dbtype; 
    var $host; 
    var $user; 
    var $pwd; 
    var $dbname; 
    var $debug; 
    var $conn; 
    function ConnDB($dbtype, $host, $user, $pwd, $dbname, $debug=FALSE){//构造函数 
        $this->dbtype=$dbtype; 
        $this->host=$host; 
        $this->user=$user; 
        $this->pwd=$pwd; 
        $this->dbname=$dbname; 
        $this->debug=$debug;  
    } 
    function GetConnId(){ 
        require BASE_PATH.'/smartTest/adodb5/adodb.inc.php';//将adodb的主文件引用进来 
        if($this->dbtype == 'mysql'){ 
            $this->conn = NewADOConnection('mysql'); 
            $this->conn->Connect($this->host, $this->user, $this->pwd, $this->dbname); 
        }else if($this->dbtype == 'mssql'){