Viewing file:  DB_result.php (8.82 KB) -rw-r--r--
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<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
/**
* CodeIgniter
*
* An open source application development framework for PHP 5.1.6 or newer
*
* @package CodeIgniter
* @author ExpressionEngine Dev Team
* @copyright Copyright (c) 2008 - 2011, 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 $custom_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')
{
if ($type == 'array') return $this->result_array();
else if ($type == 'object') return $this->result_object();
else return $this->custom_result_object($type);
}
// --------------------------------------------------------------------
/**
* Custom query result.
*
* @param class_name A string that represents the type of object you want back
* @return array of objects
*/
function custom_result_object($class_name)
{
if (array_key_exists($class_name, $this->custom_result_object))
{
return $this->custom_result_object[$class_name];
}
if ($this->result_id === FALSE OR $this->num_rows() == 0)
{
return array();
}
// add the data to the object
$this->_data_seek(0);
$result_object = array();
while ($row = $this->_fetch_object())
{
$object = new $class_name();
foreach ($row as $key => $value)
{
$object->$key = $value;
}
$result_object[] = $object;
}
// return the array
return $this->custom_result_object[$class_name] = $result_object;
}
/**
* Query result. "object" version.
*
* @access public
* @return object
*/
function result_object()
{
if (count($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
$n = 0;
}
if ($type == 'object') return $this->row_object($n);
else if ($type == 'array') return $this->row_array($n);
else return $this->custom_row_object($n, $type);
}
// --------------------------------------------------------------------
/**
* Assigns an item into a particular column slot
*
* @access public
* @return object
*/
function set_row($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] = $value;
}
}
// --------------------------------------------------------------------
/**
* Returns a single result row - custom object version
*
* @access public
* @return object
*/
function custom_row_object($n, $type)
{
$result = $this->custom_result_object($type);
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 - 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 */
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