540 行
13 KiB
PHP
540 行
13 KiB
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/userguide3/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;
|
|
}
|
|
|
|
if ( ! $this->_mysqli->set_charset($this->char_set))
|
|
{
|
|
log_message('error', "Database: Unable to set the configured connection charset ('{$this->char_set}').");
|
|
$this->_mysqli->close();
|
|
return ($this->db->db_debug) ? $this->display_error('db_unable_to_set_charset', $this->char_set) : 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;
|
|
$this->data_cache = array();
|
|
return TRUE;
|
|
}
|
|
|
|
return FALSE;
|
|
}
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* Database version number
|
|
*
|
|
* @return string
|
|
*/
|
|
public function version()
|
|
{
|
|
if (isset($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();
|
|
}
|
|
|
|
}
|