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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 - 2017, 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 - 2017, British Columbia Institute of Technology (http://bcit.ca/)* @license http://opensource.org/licenses/MIT MIT License* @link https://codeigniter.com* @since Version 3.0.0* @filesource*/defined('BASEPATH') OR exit('No direct script access allowed');/*** PDO MySQL 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_mysql_driver extends CI_DB_pdo_driver {/*** Sub-driver** @var string*/public $subdriver = 'mysql';/*** Compression flag** @var bool*/public $compress = FALSE;/*** Strict ON flag** Whether we're running in strict SQL mode.** @var bool*/public $stricton;// --------------------------------------------------------------------/*** Identifier escape character** @var string*/protected $_escape_char = '`';// --------------------------------------------------------------------/*** Class constructor** Builds the DSN if not already set.** @param array $params* @return void*/public function __construct($params){parent::__construct($params);if (empty($this->dsn)){$this->dsn = 'mysql:host='.(empty($this->hostname) ? '127.0.0.1' : $this->hostname);empty($this->port) OR $this->dsn .= ';port='.$this->port;empty($this->database) OR $this->dsn .= ';dbname='.$this->database;empty($this->char_set) OR $this->dsn .= ';charset='.$this->char_set;}elseif ( ! empty($this->char_set) && strpos($this->dsn, 'charset=', 6) === FALSE){$this->dsn .= ';charset='.$this->char_set;}}// --------------------------------------------------------------------/*** Database connection** @param bool $persistent* @return object*/public function db_connect($persistent = FALSE){if (isset($this->stricton)){if ($this->stricton){$sql = 'CONCAT(@@sql_mode, ",", "STRICT_ALL_TABLES")';}else{$sql = 'REPLACE(REPLACE(REPLACE(REPLACE(REPLACE(REPLACE(@@sql_mode,"STRICT_ALL_TABLES,", ""),",STRICT_ALL_TABLES", ""),"STRICT_ALL_TABLES", ""),"STRICT_TRANS_TABLES,", ""),",STRICT_TRANS_TABLES", ""),"STRICT_TRANS_TABLES", "")';}if ( ! empty($sql)){if (empty($this->options[PDO::MYSQL_ATTR_INIT_COMMAND])){$this->options[PDO::MYSQL_ATTR_INIT_COMMAND] = 'SET SESSION sql_mode = '.$sql;}else{$this->options[PDO::MYSQL_ATTR_INIT_COMMAND] .= ', @@session.sql_mode = '.$sql;}}}if ($this->compress === TRUE){$this->options[PDO::MYSQL_ATTR_COMPRESS] = TRUE;}if (is_array($this->encrypt)){$ssl = array();empty($this->encrypt['ssl_key']) OR $ssl[PDO::MYSQL_ATTR_SSL_KEY] = $this->encrypt['ssl_key'];empty($this->encrypt['ssl_cert']) OR $ssl[PDO::MYSQL_ATTR_SSL_CERT] = $this->encrypt['ssl_cert'];empty($this->encrypt['ssl_ca']) OR $ssl[PDO::MYSQL_ATTR_SSL_CA] = $this->encrypt['ssl_ca'];empty($this->encrypt['ssl_capath']) OR $ssl[PDO::MYSQL_ATTR_SSL_CAPATH] = $this->encrypt['ssl_capath'];empty($this->encrypt['ssl_cipher']) OR $ssl[PDO::MYSQL_ATTR_SSL_CIPHER] = $this->encrypt['ssl_cipher'];// DO NOT use array_merge() here!// It re-indexes numeric keys and the PDO_MYSQL_ATTR_SSL_* constants are integers.empty($ssl) OR $this->options += $ssl;}// Prior to version 5.7.3, MySQL silently downgrades to an unencrypted connection if SSL setup failsif (($pdo = parent::db_connect($persistent)) !== FALSE&& ! empty($ssl)&& version_compare($pdo->getAttribute(PDO::ATTR_CLIENT_VERSION), '5.7.3', '<=')&& empty($pdo->query("SHOW STATUS LIKE 'ssl_cipher'")->fetchObject()->Value)){$message = 'PDO_MYSQL was configured for an SSL connection, but got an unencrypted connection instead!';log_message('error', $message);return ($this->db_debug) ? $this->display_error($message, '', TRUE) : FALSE;}return $pdo;}// --------------------------------------------------------------------/*** Select the database** @param string $database* @return bool*/public function db_select($database = ''){if ($database === ''){$database = $this->database;}if (FALSE !== $this->simple_query('USE '.$this->escape_identifiers($database))){$this->database = $database;$this->data_cache = array();return TRUE;}return FALSE;}// --------------------------------------------------------------------/*** Begin Transaction** @return bool*/protected function _trans_begin(){$this->conn_id->setAttribute(PDO::ATTR_AUTOCOMMIT, FALSE);return $this->conn_id->beginTransaction();}// --------------------------------------------------------------------/*** Commit Transaction** @return bool*/protected function _trans_commit(){if ($this->conn_id->commit()){$this->conn_id->setAttribute(PDO::ATTR_AUTOCOMMIT, TRUE);return TRUE;}return FALSE;}// --------------------------------------------------------------------/*** Rollback Transaction** @return bool*/protected function _trans_rollback(){if ($this->conn_id->rollBack()){$this->conn_id->setAttribute(PDO::ATTR_AUTOCOMMIT, TRUE);return TRUE;}return FALSE;}// --------------------------------------------------------------------/*** Show table query** Generates a platform-specific query string so that the table names can be fetched** @param bool $prefix_limit* @return string*/protected function _list_tables($prefix_limit = FALSE){$sql = 'SHOW TABLES';if ($prefix_limit === TRUE && $this->dbprefix !== ''){return $sql." LIKE '".$this->escape_like_str($this->dbprefix)."%'";}return $sql;}// --------------------------------------------------------------------/*** Show column query** Generates a platform-specific query string so that the column names can be fetched** @param string $table* @return string*/protected function _list_columns($table = ''){return 'SHOW COLUMNS FROM '.$this->protect_identifiers($table, TRUE, NULL, FALSE);}// --------------------------------------------------------------------/*** Returns an object with field data** @param string $table* @return array*/public function field_data($table){if (($query = $this->query('SHOW COLUMNS FROM '.$this->protect_identifiers($table, TRUE, NULL, FALSE))) === FALSE){return FALSE;}$query = $query->result_object();$retval = array();for ($i = 0, $c = count($query); $i < $c; $i++){$retval[$i] = new stdClass();$retval[$i]->name = $query[$i]->Field;sscanf($query[$i]->Type, '%[a-z](%d)',$retval[$i]->type,$retval[$i]->max_length);$retval[$i]->default = $query[$i]->Default;$retval[$i]->primary_key = (int) ($query[$i]->Key === 'PRI');}return $retval;}// --------------------------------------------------------------------/*** 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 '.$table;}// --------------------------------------------------------------------/*** FROM tables** Groups tables in FROM clauses if needed, so there is no confusion* about operator precedence.** @return string*/protected function _from_tables(){if ( ! empty($this->qb_join) && count($this->qb_from) > 1){return '('.implode(', ', $this->qb_from).')';}return implode(', ', $this->qb_from);}}