MySQL分页模型(Pagination.php)

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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 $this-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( $pageSize1 || $pageNo1 ) return false;

                //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 = $this-currentPageStartNo;
                        while( --$firstRowNo0 && @mysql_fetch_array($rst) );

                        //取出指定页的数据
                        $read = 0;
                        $this-currentPageSize = 0;
                        while( $read$this-pageSize && $row=@mysql_fetch_array($rst) ){
                                $this-records[$this-currentPageSize++] = $dataMaker($row);
                                $read++;
                        }
                }
                else{
                        return false;
                }

                return true;
        }
};
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