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<?php /** * CodeIgniter * * An open source application development framework for PHP * * This content is released under the MIT License (MIT) * * Copyright (c) 2014 - 2018, British Columbia Institute of Technology * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. * * @package CodeIgniter * @author EllisLab Dev Team * @copyright Copyright (c) 2008 - 2014, EllisLab, Inc. (https://ellislab.com/) * @copyright Copyright (c) 2014 - 2018, British Columbia Institute of Technology (http://bcit.ca/) * @license http://opensource.org/licenses/MIT MIT License * @link https://codeigniter.com * @since Version 1.0.0 * @filesource */ defined('BASEPATH') OR exit('No direct script access allowed'); /** * 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 EllisLab Dev Team * @link https://codeigniter.com/user_guide/database/ */ class CI_DB_result { /** * Connection ID * * @var resource|object */ public $conn_id; /** * Result ID * * @var resource|object */ public $result_id; /** * Result Array * * @var array[] */ public $result_array = array(); /** * Result Object * * @var object[] */ public $result_object = array(); /** * Custom Result Object * * @var object[] */ public $custom_result_object = array(); /** * Current Row index * * @var int */ public $current_row = 0; /** * Number of rows * * @var int */ public $num_rows; /** * Row data * * @var array */ public $row_data; // -------------------------------------------------------------------- /** * Constructor * * @param object $driver_object * @return void */ public function __construct(&$driver_object) { $this->conn_id = $driver_object->conn_id; $this->result_id = $driver_object->result_id; } // -------------------------------------------------------------------- /** * Number of rows in the result set * * @return int */ public function num_rows() { if (is_int($this->num_rows)) { return $this->num_rows; } elseif (count($this->result_array) > 0) { return $this->num_rows = count($this->result_array); } elseif (count($this->result_object) > 0) { return $this->num_rows = count($this->result_object); } return $this->num_rows = count($this->result_array()); } // -------------------------------------------------------------------- /** * Query result. Acts as a wrapper function for the following functions. * * @param string $type 'object', 'array' or a custom class name * @return array */ public function result($type = 'object') { if ($type === 'array') { return $this->result_array(); } elseif ($type === 'object') { return $this->result_object(); } return $this->custom_result_object($type); } // -------------------------------------------------------------------- /** * Custom query result. * * @param string $class_name * @return array */ public function custom_result_object($class_name) { if (isset($this->custom_result_object[$class_name])) { return $this->custom_result_object[$class_name]; } elseif ( ! $this->result_id OR $this->num_rows === 0) { return array(); } // Don't fetch the result set again if we already have it $_data = NULL; if (($c = count($this->result_array)) > 0) { $_data = 'result_array'; } elseif (($c = count($this->result_object)) > 0) { $_data = 'result_object'; } if ($_data !== NULL) { for ($i = 0; $i < $c; $i++) { $this->custom_result_object[$class_name][$i] = new $class_name(); foreach ($this->{$_data}[$i] as $key => $value) { $this->custom_result_object[$class_name][$i]->$key = $value; } } return $this->custom_result_object[$class_name]; } is_null($this->row_data) OR $this->data_seek(0); $this->custom_result_object[$class_name] = array(); while ($row = $this->_fetch_object($class_name)) { $this->custom_result_object[$class_name][] = $row; } return $this->custom_result_object[$class_name]; } // -------------------------------------------------------------------- /** * Query result. "object" version. * * @return array */ public 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 not be a valid resource so we'll simply return an empty // array. if ( ! $this->result_id OR $this->num_rows === 0) { return array(); } if (($c = count($this->result_array)) > 0) { for ($i = 0; $i < $c; $i++) { $this->result_object[$i] = (object) $this->result_array[$i]; } return $this->result_object; } is_null($this->row_data) OR $this->data_seek(0); while ($row = $this->_fetch_object()) { $this->result_object[] = $row; } return $this->result_object; } // -------------------------------------------------------------------- /** * Query result. "array" version. * * @return array */ public function result_array() { if (count($this->result_array) > 0) { return $this->result_array; } // In the event that query caching is on, the result_id variable // will not be a valid resource so we'll simply return an empty // array. if ( ! $this->result_id OR $this->num_rows === 0) { return array(); } if (($c = count($this->result_object)) > 0) { for ($i = 0; $i < $c; $i++) { $this->result_array[$i] = (array) $this->result_object[$i]; } return $this->result_array; } is_null($this->row_data) OR $this->data_seek(0); while ($row = $this->_fetch_assoc()) { $this->result_array[] = $row; } return $this->result_array; } // -------------------------------------------------------------------- /** * Row * * A wrapper method. * * @param mixed $n * @param string $type 'object' or 'array' * @return mixed */ public function row($n = 0, $type = 'object') { if ( ! is_numeric($n)) { // We cache the row data for subsequent uses is_array($this->row_data) OR $this->row_data = $this->row_array(0); // array_key_exists() instead of isset() to allow for NULL values if (empty($this->row_data) OR ! array_key_exists($n, $this->row_data)) { return NULL; } return $this->row_data[$n]; } if ($type === 'object') return $this->row_object($n); elseif ($type === 'array') return $this->row_array($n); return $this->custom_row_object($n, $type); } // -------------------------------------------------------------------- /** * Assigns an item into a particular column slot * * @param mixed $key * @param mixed $value * @return void */ public function set_row($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 !== '' && $value !== NULL) { $this->row_data[$key] = $value; } } // -------------------------------------------------------------------- /** * Returns a single result row - custom object version * * @param int $n * @param string $type * @return object */ public function custom_row_object($n, $type) { isset($this->custom_result_object[$type]) OR $this->custom_result_object($type); if (count($this->custom_result_object[$type]) === 0) { return NULL; } if ($n !== $this->current_row && isset($this->custom_result_object[$type][$n])) { $this->current_row = $n; } return $this->custom_result_object[$type][$this->current_row]; } // -------------------------------------------------------------------- /** * Returns a single result row - object version * * @param int $n * @return object */ public function row_object($n = 0) { $result = $this->result_object(); if (count($result) === 0) { return NULL; } if ($n !== $this->current_row && isset($result[$n])) { $this->current_row = $n; } return $result[$this->current_row]; } // -------------------------------------------------------------------- /** * Returns a single result row - array version * * @param int $n * @return array */ public function row_array($n = 0) { $result = $this->result_array(); if (count($result) === 0) { return NULL; } if ($n !== $this->current_row && isset($result[$n])) { $this->current_row = $n; } return $result[$this->current_row]; } // -------------------------------------------------------------------- /** * Returns the "first" row * * @param string $type * @return mixed */ public function first_row($type = 'object') { $result = $this->result($type); return (count($result) === 0) ? NULL : $result[0]; } // -------------------------------------------------------------------- /** * Returns the "last" row * * @param string $type * @return mixed */ public function last_row($type = 'object') { $result = $this->result($type); return (count($result) === 0) ? NULL : $result[count($result) - 1]; } // -------------------------------------------------------------------- /** * Returns the "next" row * * @param string $type * @return mixed */ public function next_row($type = 'object') { $result = $this->result($type); if (count($result) === 0) { return NULL; } return isset($result[$this->current_row + 1]) ? $result[++$this->current_row] : NULL; } // -------------------------------------------------------------------- /** * Returns the "previous" row * * @param string $type * @return mixed */ public function previous_row($type = 'object') { $result = $this->result($type); if (count($result) === 0) { return NULL; } if (isset($result[$this->current_row - 1])) { --$this->current_row; } return $result[$this->current_row]; } // -------------------------------------------------------------------- /** * Returns an unbuffered row and move pointer to next row * * @param string $type 'array', 'object' or a custom class name * @return mixed */ public function unbuffered_row($type = 'object') { if ($type === 'array') { return $this->_fetch_assoc(); } elseif ($type === 'object') { return $this->_fetch_object(); } return $this->_fetch_object($type); } // -------------------------------------------------------------------- /** * The following methods 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. */ // -------------------------------------------------------------------- /** * Number of fields in the result set * * Overridden by driver result classes. * * @return int */ public function num_fields() { return 0; } // -------------------------------------------------------------------- /** * Fetch Field Names * * Generates an array of column names. * * Overridden by driver result classes. * * @return array */ public function list_fields() { return array(); } // -------------------------------------------------------------------- /** * Field data * * Generates an array of objects containing field meta-data. * * Overridden by driver result classes. * * @return array */ public function field_data() { return array(); } // -------------------------------------------------------------------- /** * Free the result * * Overridden by driver result classes. * * @return void */ public function free_result() { $this->result_id = FALSE; } // -------------------------------------------------------------------- /** * Data Seek * * Moves the internal pointer to the desired offset. We call * this internally before fetching results to make sure the * result set starts at zero. * * Overridden by driver result classes. * * @param int $n * @return bool */ public function data_seek($n = 0) { return FALSE; } // -------------------------------------------------------------------- /** * Result - associative array * * Returns the result set as an array. * * Overridden by driver result classes. * * @return array */ protected function _fetch_assoc() { return array(); } // -------------------------------------------------------------------- /** * Result - object * * Returns the result set as an object. * * Overridden by driver result classes. * * @param string $class_name * @return object */ protected function _fetch_object($class_name = 'stdClass') { return new $class_name(); } }