PHP oracle分页

oracle分页

function getall($query, $start=0, $rows=-1)
        {
             $this->dbh = oci_connect('aaa','mmm',"(DEscriptION=(ADDRESS=(PROTOCOL =TCP)(HOST=bbb)(PORT = 1521))(CONNECT_DATA =(SID=vvv)))");       
             $this->sth = oci_parse($this->dbh, $query);
             oci_execute($this->sth, OCI_DEFAULT) or $this->error($this->sth, $query);
             oci_fetch_all($this->sth, $res, $start, $rows, OCI_FETCHSTATEMENT_BY_ROW+OCI_ASSOC);
             return $res;
        }
        /**
        * 获取分页数
        *
        * $query  string   查询语句
        * $total  int    总条数
        * $page  int    页数
        * $rows  int    每页显示数
        * @return integer  总行数
        */
        function getpage($query, $total, $page, $rows=VAR_PAGENAV_ROWS)
        {
             $start_row = ($page - 1) * $rows + 1;
             $start_row = $start_row > $total ? 1 : $start_row;
             $end_row  = $start_row + $rows - 1;
             $end_row  = $end_row > $total ? $total : $end_row;
             $query   = "SELECT * FROM ( SELECT ROWNUM as row_num, r.* FROM ( $query ) r WHERE ROWNUM <= $end_row ) WHERE $start_row <= row_num";
             return $this->getall($query);
        }
        /**
        * 获取一个查询的总行数
        *
        * $string $sql 查询语句
        *
        * return integer 总行数
        */
        function getcount($sql){
             $subSQL = 'select count(*) '.stristr($sql, 'from');
             return $this->getone($subSQL);
        }


        function getone($query)
        {
             $row = $this->getrow($query);
             if (is_array($row))
             $one = current($row);
             else
             $one = '';
             unset($row);
             return $one;
        }


        function getrow($query)
        {
             if (false === stripos($query, 'COUNT(')) {
                 if (false === stripos($query, 'WHERE')) {
                     $query .= ' WHERE ROWNUM = 1';
                 }else {
                     $query .= ' AND ROWNUM = 1';
                 }
             }
             $result = $this->getall($query, 0, 1);
             if (empty($result))
             $row = array();
             else
             $row = $result[0];
             unset($result);
             return $row;
        }

        public function test()
        {
            $sql = 'SELECT * FROM TBL_ACCOUNT_CHANNEL ';
            $page = 10;
            $total = $this->getcount($sql);
            $page_number = 10;
            $result = $this->getpage($sql,$total,$page,$page_number);
            print_r($result);
        }