PHP实现的oracle分页函数实例

/** * 数据连接 */function connect($db_user, $db_pwd, $db_name, $db_nls){ $this->dbh = oci_connect($db_user, $db_pwd, $db_name, $db_nls);}function getall($query, $start=0, $rows=-1){ $this->dbh = emptyempty($this->dbh) ? $this->connect() : $this->dbh; $this->sth = oci_parse($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 (emptyempty($result)) $row = array(); else $row = $result[0]; unset($result); return $row;}

$total = $this->db->getcount($sql);$result = $this->db->getpage($sql,$total,$page,$page_number);