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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 - 2019, 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 - 2019, British Columbia Institute of Technology (https://bcit.ca/)* @license https://opensource.org/licenses/MIT MIT License* @link https://codeigniter.com* @since Version 1.3.0* @filesource*/defined('BASEPATH') OR exit('No direct script access allowed');/*** MySQLi 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_mysqli_driver extends CI_DB {/*** Database driver** @var string*/public $dbdriver = 'mysqli';/*** Compression flag** @var bool*/public $compress = FALSE;/*** DELETE hack flag** Whether to use the MySQL "delete hack" which allows the number* of affected rows to be shown. Uses a preg_replace when enabled,* adding a bit more processing to all queries.** @var bool*/public $delete_hack = TRUE;/*** Strict ON flag** Whether we're running in strict SQL mode.** @var bool*/public $stricton;// --------------------------------------------------------------------/*** Identifier escape character** @var string*/protected $_escape_char = '`';// --------------------------------------------------------------------/*** MySQLi object** Has to be preserved without being assigned to $conn_id.** @var MySQLi*/protected $_mysqli;// --------------------------------------------------------------------/*** Database connection** @param bool $persistent* @return object*/public function db_connect($persistent = FALSE){// Do we have a socket path?if ($this->hostname[0] === '/'){$hostname = NULL;$port = NULL;$socket = $this->hostname;}else{$hostname = ($persistent === TRUE)? 'p:'.$this->hostname : $this->hostname;$port = empty($this->port) ? NULL : $this->port;$socket = NULL;}$client_flags = ($this->compress === TRUE) ? MYSQLI_CLIENT_COMPRESS : 0;$this->_mysqli = mysqli_init();$this->_mysqli->options(MYSQLI_OPT_CONNECT_TIMEOUT, 10);if (isset($this->stricton)){if ($this->stricton){$this->_mysqli->options(MYSQLI_INIT_COMMAND, 'SET SESSION sql_mode = CONCAT(@@sql_mode, ",", "STRICT_ALL_TABLES")');}else{$this->_mysqli->options(MYSQLI_INIT_COMMAND,'SET SESSION sql_mode =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 (is_array($this->encrypt)){$ssl = array();empty($this->encrypt['ssl_key']) OR $ssl['key'] = $this->encrypt['ssl_key'];empty($this->encrypt['ssl_cert']) OR $ssl['cert'] = $this->encrypt['ssl_cert'];empty($this->encrypt['ssl_ca']) OR $ssl['ca'] = $this->encrypt['ssl_ca'];empty($this->encrypt['ssl_capath']) OR $ssl['capath'] = $this->encrypt['ssl_capath'];empty($this->encrypt['ssl_cipher']) OR $ssl['cipher'] = $this->encrypt['ssl_cipher'];if (isset($this->encrypt['ssl_verify'])){$client_flags |= MYSQLI_CLIENT_SSL;if ($this->encrypt['ssl_verify']){defined('MYSQLI_OPT_SSL_VERIFY_SERVER_CERT') && $this->_mysqli->options(MYSQLI_OPT_SSL_VERIFY_SERVER_CERT, TRUE);}// Apparently (when it exists), setting MYSQLI_OPT_SSL_VERIFY_SERVER_CERT// to FALSE didn't do anything, so PHP 5.6.16 introduced yet another// constant ...//// https://secure.php.net/ChangeLog-5.php#5.6.16// https://bugs.php.net/bug.php?id=68344elseif (defined('MYSQLI_CLIENT_SSL_DONT_VERIFY_SERVER_CERT')){$client_flags |= MYSQLI_CLIENT_SSL_DONT_VERIFY_SERVER_CERT;}}if ( ! empty($ssl)){$client_flags |= MYSQLI_CLIENT_SSL;$this->_mysqli->ssl_set(isset($ssl['key']) ? $ssl['key'] : NULL,isset($ssl['cert']) ? $ssl['cert'] : NULL,isset($ssl['ca']) ? $ssl['ca'] : NULL,isset($ssl['capath']) ? $ssl['capath'] : NULL,isset($ssl['cipher']) ? $ssl['cipher'] : NULL);}}if ($this->_mysqli->real_connect($hostname, $this->username, $this->password, $this->database, $port, $socket, $client_flags)){// Prior to version 5.7.3, MySQL silently downgrades to an unencrypted connection if SSL setup failsif (($client_flags & MYSQLI_CLIENT_SSL)&& version_compare($this->_mysqli->client_info, '5.7.3', '<=')&& empty($this->_mysqli->query("SHOW STATUS LIKE 'ssl_cipher'")->fetch_object()->Value)){$this->_mysqli->close();$message = 'MySQLi 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 $this->_mysqli;}return FALSE;}// --------------------------------------------------------------------/*** Reconnect** Keep / reestablish the db connection if no queries have been* sent for a length of time exceeding the server's idle timeout** @return void*/public function reconnect(){if ($this->conn_id !== FALSE && $this->conn_id->ping() === FALSE){$this->conn_id = FALSE;}}// --------------------------------------------------------------------/*** Select the database** @param string $database* @return bool*/public function db_select($database = ''){if ($database === ''){$database = $this->database;}if ($this->conn_id->select_db($database)){$this->database = $database;$this->data_cache = array();return TRUE;}return FALSE;}// --------------------------------------------------------------------/*** Set client character set** @param string $charset* @return bool*/protected function _db_set_charset($charset){return $this->conn_id->set_charset($charset);}// --------------------------------------------------------------------/*** Database version number** @return string*/public function version(){if (isset($this->data_cache['version'])){return $this->data_cache['version'];}return $this->data_cache['version'] = $this->conn_id->server_info;}// --------------------------------------------------------------------/*** Execute the query** @param string $sql an SQL query* @return mixed*/protected function _execute($sql){return $this->conn_id->query($this->_prep_query($sql));}// --------------------------------------------------------------------/*** Prep the query** If needed, each database adapter can prep the query string** @param string $sql an SQL query* @return string*/protected function _prep_query($sql){// mysqli_affected_rows() returns 0 for "DELETE FROM TABLE" queries. This hack// modifies the query so that it a proper number of affected rows is returned.if ($this->delete_hack === TRUE && preg_match('/^\s*DELETE\s+FROM\s+(\S+)\s*$/i', $sql)){return trim($sql).' WHERE 1=1';}return $sql;}// --------------------------------------------------------------------/*** Begin Transaction** @return bool*/protected function _trans_begin(){$this->conn_id->autocommit(FALSE);return is_php('5.5')? $this->conn_id->begin_transaction(): $this->simple_query('START TRANSACTION'); // can also be BEGIN or BEGIN WORK}// --------------------------------------------------------------------/*** Commit Transaction** @return bool*/protected function _trans_commit(){if ($this->conn_id->commit()){$this->conn_id->autocommit(TRUE);return TRUE;}return FALSE;}// --------------------------------------------------------------------/*** Rollback Transaction** @return bool*/protected function _trans_rollback(){if ($this->conn_id->rollback()){$this->conn_id->autocommit(TRUE);return TRUE;}return FALSE;}// --------------------------------------------------------------------/*** Platform-dependent string escape** @param string* @return string*/protected function _escape_str($str){return $this->conn_id->real_escape_string($str);}// --------------------------------------------------------------------/*** Affected Rows** @return int*/public function affected_rows(){return $this->conn_id->affected_rows;}// --------------------------------------------------------------------/*** Insert ID** @return int*/public function insert_id(){return $this->conn_id->insert_id;}// --------------------------------------------------------------------/*** List 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){$sql = 'SHOW TABLES FROM '.$this->_escape_char.$this->database.$this->_escape_char;if ($prefix_limit !== FALSE && $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 $retval;}// --------------------------------------------------------------------/*** Error** Returns an array containing code and message of the last* database error that has occurred.** @return array*/public function error(){if ( ! empty($this->_mysqli->connect_errno)){return array('code' => $this->_mysqli->connect_errno,'message' => $this->_mysqli->connect_error);}return array('code' => $this->conn_id->errno, 'message' => $this->conn_id->error);}// --------------------------------------------------------------------/*** FROM tables** Groups tables in FROM clauses if needed, so there is no confusion* about operator precedence.** @return string*/protected function _from_tables(){if ( ! empty($this->qb_join) && count($this->qb_from) > 1){return '('.implode(', ', $this->qb_from).')';}return implode(', ', $this->qb_from);}// --------------------------------------------------------------------/*** Close DB Connection** @return void*/protected function _close(){$this->conn_id->close();}}