class pagination {
        var $pagesize;        //页大小
        var $pageno;                //当前页码
        var $rowcount;        //记录总数
        var $pagecount;        //总页数
        var $records;                //当前页记录
        var $currentpagesize;        //当前页记录总数
        var $currentpagestartno;     //当前页开始记录号
        //判断是否有电脑教程之家 http://www.pcppc.cn
        function hasnextpage() {
                return $this->pageno pagecount;
        }
        //取得电脑教程之家 http://www.pcppc.cn页码
        function getnextpageno() {
                return $this->pageno + 1;
        }
        //判断是否有上一页
        function haspriorpage() {
                return $this->pageno > 1;
        }
        //取得上一页页码
        function getpriorpageno() {
                return $this->pageno - 1;
        }
        //判断是否第一页
        function isfirstpage(){
                return $this->pageno == 1 || $this->pagecount==0;
        }
        //判断是否最后一页
        function islastpage(){
                return $this->pageno == $this->pagecount || $this->pagecount==0;
        }
        //装载某一页数据，成功则返回true，失败则返回false
        //        datamaker是一个函数名，用于将一条记录转换为一个对象
        //        有一个参数为当前记录所有字段的值(一个以数字或字段名为索引的数组)
        function load($con, $sql, $datamaker, $pagesize, $pageno){
                //页大小和当前页码必须>=1
                if( $pagesize
                //查询
                if( $rst = @mysql_que
mysql教程是:mysql分页模型(pagination.php)。ry($sql, $con) ){
                        $this->pagesize = $pagesize;
                        $this->pageno = $pageno;
                        $this->rowcount = @mysql_num_rows($rst);
                        $this->pagecount = (int)(($this->rowcount + $this->pagesize - 1) / $this->pagesize);
                        $this->records = array();
                        //将光标移动到指定页的第一条记录前
                        $this->currentpagestartno = ($this->pageno - 1) * $this->pagesize + 1;
                        $firstrowno = $this->currentpagestartno;
                        while( --$firstrowno>0 && @mysql_fetch_array($rst) );
                        //取出指定页的数据
                        $read = 0;
                        $this->currentpagesize = 0;
                        while( $readpagesize && $row=@mysql_fetch_array($rst) ){
                                $this->records[$this->currentpagesize++] = $datamaker($row);
                                $read++;
                        }
                }
                else{
                        return false;
                }
                return true;
        }
};
?>