File Content: mysqli_driver.php <?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=68344 elseif (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, $client_flags)) { // Prior to version 5.7.3, MySQL silently downgrades to an unencrypted connection if SSL setup fails if ( ($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(); } } Submit