473 lines
10 KiB
PHP
Executable File
473 lines
10 KiB
PHP
Executable File
<?php
|
|
/**
|
|
* CodeIgniter
|
|
*
|
|
* An open source application development framework for PHP 5.2.4 or newer
|
|
*
|
|
* NOTICE OF LICENSE
|
|
*
|
|
* Licensed under the Open Software License version 3.0
|
|
*
|
|
* This source file is subject to the Open Software License (OSL 3.0) that is
|
|
* bundled with this package in the files license.txt / license.rst. It is
|
|
* also available through the world wide web at this URL:
|
|
* http://opensource.org/licenses/OSL-3.0
|
|
* If you did not receive a copy of the license and are unable to obtain it
|
|
* through the world wide web, please send an email to
|
|
* licensing@ellislab.com so we can send you a copy immediately.
|
|
*
|
|
* @package CodeIgniter
|
|
* @author EllisLab Dev Team
|
|
* @copyright Copyright (c) 2008 - 2014, EllisLab, Inc. (http://ellislab.com/)
|
|
* @license http://opensource.org/licenses/OSL-3.0 Open Software License (OSL 3.0)
|
|
* @link http://codeigniter.com
|
|
* @since Version 1.0
|
|
* @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 http://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 = FALSE;
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* Identifier escape character
|
|
*
|
|
* @var string
|
|
*/
|
|
protected $_escape_char = '`';
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* Database connection
|
|
*
|
|
* @param bool $persistent
|
|
* @return object
|
|
* @todo SSL support
|
|
*/
|
|
public function db_connect($persistent = FALSE)
|
|
{
|
|
// Persistent connection support was added in PHP 5.3.0
|
|
$hostname = ($persistent === TRUE && is_php('5.3'))
|
|
? 'p:'.$this->hostname : $this->hostname;
|
|
$port = empty($this->port) ? NULL : $this->port;
|
|
$client_flags = ($this->compress === TRUE) ? MYSQLI_CLIENT_COMPRESS : 0;
|
|
$mysqli = mysqli_init();
|
|
|
|
if ($this->stricton)
|
|
{
|
|
$mysqli->options(MYSQLI_INIT_COMMAND, 'SET SESSION sql_mode="STRICT_ALL_TABLES"');
|
|
}
|
|
|
|
return $mysqli->real_connect($hostname, $this->username, $this->password, $this->database, $port, NULL, $client_flags)
|
|
? $mysqli : FALSE;
|
|
}
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* Reconnect
|
|
*
|
|
* Keep / reestablish the db connection if no queries have been
|
|
* sent for a length of time exceeding the server's idle timeout
|
|
*
|
|
* @return void
|
|
*/
|
|
public function reconnect()
|
|
{
|
|
if ($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;
|
|
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'];
|
|
}
|
|
elseif ( ! $this->conn_id)
|
|
{
|
|
$this->initialize();
|
|
}
|
|
|
|
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
|
|
*
|
|
* @param bool $test_mode
|
|
* @return bool
|
|
*/
|
|
public function trans_begin($test_mode = FALSE)
|
|
{
|
|
// When transactions are nested we only begin/commit/rollback the outermost ones
|
|
if ( ! $this->trans_enabled OR $this->_trans_depth > 0)
|
|
{
|
|
return TRUE;
|
|
}
|
|
|
|
// Reset the transaction failure flag.
|
|
// If the $test_mode flag is set to TRUE transactions will be rolled back
|
|
// even if the queries produce a successful result.
|
|
$this->_trans_failure = ($test_mode === TRUE);
|
|
|
|
$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
|
|
*/
|
|
public function trans_commit()
|
|
{
|
|
// When transactions are nested we only begin/commit/rollback the outermost ones
|
|
if ( ! $this->trans_enabled OR $this->_trans_depth > 0)
|
|
{
|
|
return TRUE;
|
|
}
|
|
|
|
if ($this->conn_id->commit())
|
|
{
|
|
$this->conn_id->autocommit(TRUE);
|
|
return TRUE;
|
|
}
|
|
|
|
return FALSE;
|
|
}
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* Rollback Transaction
|
|
*
|
|
* @return bool
|
|
*/
|
|
public function trans_rollback()
|
|
{
|
|
// When transactions are nested we only begin/commit/rollback the outermost ones
|
|
if ( ! $this->trans_enabled OR $this->_trans_depth > 0)
|
|
{
|
|
return TRUE;
|
|
}
|
|
|
|
if ($this->conn_id->rollback())
|
|
{
|
|
$this->conn_id->autocommit(TRUE);
|
|
return TRUE;
|
|
}
|
|
|
|
return FALSE;
|
|
}
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* Platform-dependant string escape
|
|
*
|
|
* @param string
|
|
* @return string
|
|
*/
|
|
protected function _escape_str($str)
|
|
{
|
|
return is_object($this->conn_id)
|
|
? $this->conn_id->real_escape_string($str)
|
|
: addslashes($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_identifiers($this->database);
|
|
|
|
if ($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 ($table === '')
|
|
{
|
|
return ($this->db_debug) ? $this->display_error('db_field_param_missing') : FALSE;
|
|
}
|
|
|
|
if (($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 $retval;
|
|
}
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* Error
|
|
*
|
|
* Returns an array containing code and message of the last
|
|
* database error that has occured.
|
|
*
|
|
* @return array
|
|
*/
|
|
public function error()
|
|
{
|
|
if ( ! empty($this->conn_id->connect_errno))
|
|
{
|
|
return array(
|
|
'code' => $this->conn_id->connect_errno,
|
|
'message' => is_php('5.2.9') ? $this->conn_id->connect_error : 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();
|
|
}
|
|
|
|
}
|
|
|
|
/* End of file mysqli_driver.php */
|
|
/* Location: ./system/database/drivers/mysqli/mysqli_driver.php */ |