system/database/drivers/mysqli/mysqli_result.php

<?php  if (!defined('BASEPATH')) exit('No direct script access allowed');
/**
 * Code Igniter
 *
 * An open source application development framework for PHP 4.3.2 or newer
 *
 * @package		CodeIgniter
 * @author		Rick Ellis
 * @copyright	Copyright (c) 2006, pMachine, Inc.
 * @license		http://www.codeignitor.com/user_guide/license.html 
 * @link		http://www.codeigniter.com
 * @since		Version 1.0
 * @filesource
 */
 
// ------------------------------------------------------------------------

/**
 * MySQLi Result Class
 *
 * This class extends the parent result class: CI_DB_result
 *
 * @category	Database
 * @author		Rick Ellis
 * @link		http://www.codeigniter.com/user_guide/database/
 */
class CI_DB_mysqli_result extends CI_DB_result {
	
	/**
	 * Number of rows in the result set
	 *
	 * @access	public
	 * @return	integer
	 */
	function num_rows()
	{
		return @mysqli_num_rows($this->result_id);
	}
	
	// --------------------------------------------------------------------

	/**
	 * Number of fields in the result set
	 *
	 * @access	public
	 * @return	integer
	 */
	function num_fields()
	{
		return @mysqli_num_fields($this->result_id);
	}

	// --------------------------------------------------------------------

	/**
	 * Fetch Field Names
	 *
	 * Generates an array of column names
	 *
	 * @access	public
	 * @return	array
	 */
	function field_names()
	{
		$field_names = array();
		while ($field = mysql_fetch_field($this->result_id))
		{
			$field_names[] = $field->name;       
		}
		
		return $field_names;
	}

	// --------------------------------------------------------------------

	/**
	 * Field data
	 *
	 * Generates an array of objects containing field meta-data
	 *
	 * @access	public
	 * @return	array
	 */
	function field_data()
	{
		$retval = array();
		while ($field = mysqli_fetch_field($this->result_id))
		{	
			$F 				= new stdClass();
			$F->name 		= $field->name;
			$F->type 		= $field->type;
			$F->default		= $field->def;
			$F->max_length	= $field->max_length;
			$F->primary_key = ($field->flags & MYSQLI_PRI_KEY_FLAG) ? 1 : 0;
			
			$retval[] = $F;
		}
		
		return $retval;
	}

	// --------------------------------------------------------------------

	/**
	 * Free the result
	 *
	 * @return	null
	 */		
	function free_result()
	{
		if (is_resource($this->result_id))
		{
        	mysqli_free_result($this->result_id);
        	$this->result_id = FALSE;
		}
	}

	// --------------------------------------------------------------------

	/**
	 * Result - associative array
	 *
	 * Returns the result set as an array
	 *
	 * @access	private
	 * @return	array
	 */
	function _fetch_assoc()
	{
		return mysqli_fetch_assoc($this->result_id);
	}
	
	// --------------------------------------------------------------------

	/**
	 * Result - object
	 *
	 * Returns the result set as an object
	 *
	 * @access	private
	 * @return	object
	 */
	function _fetch_object()
	{
		return mysqli_fetch_object($this->result_id);
	}
	
}

?>