<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed'); /** * CodeIgniter * * An open source application development framework for PHP 4.3.2 or newer * * @package CodeIgniter * @author ExpressionEngine Dev Team * @copyright Copyright (c) 2008, EllisLab, Inc. * @license http://codeigniter.com/user_guide/license.html * @link http://codeigniter.com * @since Version 1.0 * @filesource */ // ------------------------------------------------------------------------ /** * Database Result Class * * This is the platform-independent result class. * This class will not be called directly. Rather, the adapter * class for the specific database will extend and instantiate it. * * @category Database * @author ExpressionEngine Dev Team * @link http://codeigniter.com/user_guide/database/ */ class CI_DB_result { var $conn_id = NULL; var $result_id = NULL; var $result_array = array(); var $result_object = array(); var $current_row = 0; var $num_rows = 0; var $row_data = NULL; /** * Query result. Acts as a wrapper function for the following functions. * * @access public * @param string can be "object" or "array" * @return mixed either a result object or array */ function result($type = 'object') { return ($type == 'object') ? $this->result_object() : $this->result_array(); } // -------------------------------------------------------------------- /** * Query result. "object" version. * * @access public * @return object */ function result_object() { if (count($this->result_object) > 0) { return $this->result_object; } // In the event that query caching is on the result_id variable // will return FALSE since there isn't a valid SQL resource so // we'll simply return an empty array. if ($this->result_id === FALSE OR $this->num_rows() == 0) { return array(); } $this->_data_seek(0); while ($row = $this->_fetch_object()) { $this->result_object[] = $row; } return $this->result_object; } // -------------------------------------------------------------------- /** * Query result. "array" version. * * @access public * @return array */ function result_array() { if (count($this->result_array) > 0) { return $this->result_array; } // In the event that query caching is on the result_id variable // will return FALSE since there isn't a valid SQL resource so // we'll simply return an empty array. if ($this->result_id === FALSE OR $this->num_rows() == 0) { return array(); } $this->_data_seek(0); while ($row = $this->_fetch_assoc()) { $this->result_array[] = $row; } return $this->result_array; } // -------------------------------------------------------------------- /** * Query result. Acts as a wrapper function for the following functions. * * @access public * @param string * @param string can be "object" or "array" * @return mixed either a result object or array */ function row($n = 0, $type = 'object') { if ( ! is_numeric($n)) { // We cache the row data for subsequent uses if ( ! is_array($this->row_data)) { $this->row_data = $this->row_array(0); } // array_key_exists() instead of isset() to allow for MySQL NULL values if (array_key_exists($n, $this->row_data)) { return $this->row_data[$n]; } // reset the $n variable if the result was not achieved $n = 0; } return ($type == 'object') ? $this->row_object($n) : $this->row_array($n); } // -------------------------------------------------------------------- /** * Assigns an item into a particular column slot * * @access public * @return object */ function set_row($key, $value = NULL) { // We cache the row data for subsequent uses if ( ! is_array($this->row_data)) { $this->row_data = $this->row_array(0); } if (is_array($key)) { foreach ($key as $k => $v) { $this->row_data[$k] = $v; } return; } if ($key != '' AND ! is_null($value)) { $this->row_data[$key] = $value; } } // -------------------------------------------------------------------- /** * Returns a single result row - object version * * @access public * @return object */ function row_object($n = 0) { $result = $this->result_object(); if (count($result) == 0) { return $result; } if ($n != $this->current_row AND isset($result[$n])) { $this->current_row = $n; } return $result[$this->current_row]; } // -------------------------------------------------------------------- /** * Returns a single result row - array version * * @access public * @return array */ function row_array($n = 0) { $result = $this->result_array(); if (count($result) == 0) { return $result; } if ($n != $this->current_row AND isset($result[$n])) { $this->current_row = $n; } return $result[$this->current_row]; } // -------------------------------------------------------------------- /** * Returns the "first" row * * @access public * @return object */ function first_row($type = 'object') { $result = $this->result($type); if (count($result) == 0) { return $result; } return $result[0]; } // -------------------------------------------------------------------- /** * Returns the "last" row * * @access public * @return object */ function last_row($type = 'object') { $result = $this->result($type); if (count($result) == 0) { return $result; } return $result[count($result) -1]; } // -------------------------------------------------------------------- /** * Returns the "next" row * * @access public * @return object */ function next_row($type = 'object') { $result = $this->result($type); if (count($result) == 0) { return $result; } if (isset($result[$this->current_row + 1])) { ++$this->current_row; } return $result[$this->current_row]; } // -------------------------------------------------------------------- /** * Returns the "previous" row * * @access public * @return object */ function previous_row($type = 'object') { $result = $this->result($type); if (count($result) == 0) { return $result; } if (isset($result[$this->current_row - 1])) { --$this->current_row; } return $result[$this->current_row]; } // -------------------------------------------------------------------- /** * The following functions are normally overloaded by the identically named * methods in the platform-specific driver -- except when query caching * is used. When caching is enabled we do not load the other driver. * These functions are primarily here to prevent undefined function errors * when a cached result object is in use. They are not otherwise fully * operational due to the unavailability of the database resource IDs with * cached results. */ function num_rows() { return $this->num_rows; } function num_fields() { return 0; } function list_fields() { return array(); } function field_data() { return array(); } function free_result() { return TRUE; } function _data_seek() { return TRUE; } function _fetch_assoc() { return array(); } function _fetch_object() { return array(); } } // END DB_result class /* End of file DB_result.php */ /* Location: ./system/database/DB_result.php */