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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 - 2016, 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 - 2016, British Columbia Institute of Technology (http://bcit.ca/)* @license http://opensource.org/licenses/MIT MIT License* @link https://codeigniter.com* @since Version 2.1.0* @filesource*/defined('BASEPATH') OR exit('No direct script access allowed');/*** PDO Database Adapter Class** Note: _DB is an extender class that the app controller* creates dynamically based on whether the query builder* class is being used or not.** @package CodeIgniter* @subpackage Drivers* @category Database* @author EllisLab Dev Team* @link https://codeigniter.com/user_guide/database/*/class CI_DB_pdo_driver extends CI_DB {/*** Database driver** @var string*/public $dbdriver = 'pdo';/*** PDO Options** @var array*/public $options = array();// --------------------------------------------------------------------/*** Class constructor** Validates the DSN string and/or detects the subdriver.** @param array $params* @return void*/public function __construct($params){parent::__construct($params);if (preg_match('/([^:]+):/', $this->dsn, $match) && count($match) === 2){// If there is a minimum valid dsn string pattern found, we're done// This is for general PDO users, who tend to have a full DSN string.$this->subdriver = $match[1];return;}// Legacy support for DSN specified in the hostname fieldelseif (preg_match('/([^:]+):/', $this->hostname, $match) && count($match) === 2){$this->dsn = $this->hostname;$this->hostname = NULL;$this->subdriver = $match[1];return;}elseif (in_array($this->subdriver, array('mssql', 'sybase'), TRUE)){$this->subdriver = 'dblib';}elseif ($this->subdriver === '4D'){$this->subdriver = '4d';}elseif ( ! in_array($this->subdriver, array('4d', 'cubrid', 'dblib', 'firebird', 'ibm', 'informix', 'mysql', 'oci', 'odbc', 'pgsql', 'sqlite', 'sqlsrv'), TRUE)){log_message('error', 'PDO: Invalid or non-existent subdriver');if ($this->db_debug){show_error('Invalid or non-existent PDO subdriver');}}$this->dsn = NULL;}// --------------------------------------------------------------------/*** Database connection** @param bool $persistent* @return object*/public function db_connect($persistent = FALSE){if ($persistent === TRUE){$this->options[PDO::ATTR_PERSISTENT] = TRUE;}try{return new PDO($this->dsn, $this->username, $this->password, $this->options);}catch (PDOException $e){if ($this->db_debug && empty($this->failover)){$this->display_error($e->getMessage(), '', TRUE);}return FALSE;}}// --------------------------------------------------------------------/*** Database version number** @return string*/public function version(){if (isset($this->data_cache['version'])){return $this->data_cache['version'];}// Not all subdrivers support the getAttribute() methodtry{return $this->data_cache['version'] = $this->conn_id->getAttribute(PDO::ATTR_SERVER_VERSION);}catch (PDOException $e){return parent::version();}}// --------------------------------------------------------------------/*** Execute the query** @param string $sql SQL query* @return mixed*/protected function _execute($sql){return $this->conn_id->query($sql);}// --------------------------------------------------------------------/*** Begin Transaction** @return bool*/protected function _trans_begin(){return $this->conn_id->beginTransaction();}// --------------------------------------------------------------------/*** Commit Transaction** @return bool*/protected function _trans_commit(){return $this->conn_id->commit();}// --------------------------------------------------------------------/*** Rollback Transaction** @return bool*/protected function _trans_rollback(){return $this->conn_id->rollBack();}// --------------------------------------------------------------------/*** Platform-dependant string escape** @param string* @return string*/protected function _escape_str($str){// Escape the string$str = $this->conn_id->quote($str);// If there are duplicated quotes, trim them awayreturn ($str[0] === "'")? substr($str, 1, -1): $str;}// --------------------------------------------------------------------/*** Affected Rows** @return int*/public function affected_rows(){return is_object($this->result_id) ? $this->result_id->rowCount() : 0;}// --------------------------------------------------------------------/*** Insert ID** @param string $name* @return int*/public function insert_id($name = NULL){return $this->conn_id->lastInsertId($name);}// --------------------------------------------------------------------/*** Field data query** Generates a platform-specific query so that the column data can be retrieved** @param string $table* @return string*/protected function _field_data($table){return 'SELECT TOP 1 * FROM '.$this->protect_identifiers($table);}// --------------------------------------------------------------------/*** Error** Returns an array containing code and message of the last* database error that has occured.** @return array*/public function error(){$error = array('code' => '00000', 'message' => '');$pdo_error = $this->conn_id->errorInfo();if (empty($pdo_error[0])){return $error;}$error['code'] = isset($pdo_error[1]) ? $pdo_error[0].'/'.$pdo_error[1] : $pdo_error[0];if (isset($pdo_error[2])){$error['message'] = $pdo_error[2];}return $error;}// --------------------------------------------------------------------/*** Update_Batch statement** Generates a platform-specific batch update string from the supplied data** @param string $table Table name* @param array $values Update data* @param string $index WHERE key* @return string*/protected function _update_batch($table, $values, $index){$ids = array();foreach ($values as $key => $val){$ids[] = $val[$index];foreach (array_keys($val) as $field){if ($field !== $index){$final[$field][] = 'WHEN '.$index.' = '.$val[$index].' THEN '.$val[$field];}}}$cases = '';foreach ($final as $k => $v){$cases .= $k.' = CASE '."\n";foreach ($v as $row){$cases .= $row."\n";}$cases .= 'ELSE '.$k.' END, ';}$this->where($index.' IN('.implode(',', $ids).')', NULL, FALSE);return 'UPDATE '.$table.' SET '.substr($cases, 0, -2).$this->_compile_wh('qb_where');}// --------------------------------------------------------------------/*** Truncate statement** Generates a platform-specific truncate string from the supplied data** If the database does not support the TRUNCATE statement,* then this method maps to 'DELETE FROM table'** @param string $table* @return string*/protected function _truncate($table){return 'TRUNCATE TABLE '.$table;}}