commitall
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Sampanna Rimal
329
hostel/system/database/drivers/pdo/pdo_driver.php
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329
hostel/system/database/drivers/pdo/pdo_driver.php
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<?php
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/**
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* CodeIgniter
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*
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* An open source application development framework for PHP
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*
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* This content is released under the MIT License (MIT)
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*
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* Copyright (c) 2014 - 2019, British Columbia Institute of Technology
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*
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* @package CodeIgniter
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* @author EllisLab Dev Team
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* @copyright Copyright (c) 2008 - 2014, EllisLab, Inc. (https://ellislab.com/)
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* @copyright Copyright (c) 2014 - 2019, British Columbia Institute of Technology (https://bcit.ca/)
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* @license https://opensource.org/licenses/MIT MIT License
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* @link https://codeigniter.com
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* @since Version 2.1.0
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* @filesource
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*/
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defined('BASEPATH') OR exit('No direct script access allowed');
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/**
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* PDO Database Adapter Class
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*
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* Note: _DB is an extender class that the app controller
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* creates dynamically based on whether the query builder
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* class is being used or not.
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*
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* @package CodeIgniter
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* @subpackage Drivers
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* @category Database
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* @author EllisLab Dev Team
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* @link https://codeigniter.com/user_guide/database/
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*/
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class CI_DB_pdo_driver extends CI_DB {
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/**
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* Database driver
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*
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* @var string
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*/
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public $dbdriver = 'pdo';
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/**
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* PDO Options
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*
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* @var array
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*/
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public $options = array();
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// --------------------------------------------------------------------
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/**
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* Class constructor
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*
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* Validates the DSN string and/or detects the subdriver.
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*
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* @param array $params
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* @return void
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*/
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public function __construct($params)
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{
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parent::__construct($params);
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if (preg_match('/([^:]+):/', $this->dsn, $match) && count($match) === 2)
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{
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// If there is a minimum valid dsn string pattern found, we're done
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// This is for general PDO users, who tend to have a full DSN string.
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$this->subdriver = $match[1];
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return;
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}
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// Legacy support for DSN specified in the hostname field
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elseif (preg_match('/([^:]+):/', $this->hostname, $match) && count($match) === 2)
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{
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$this->dsn = $this->hostname;
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$this->hostname = NULL;
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$this->subdriver = $match[1];
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return;
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}
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elseif (in_array($this->subdriver, array('mssql', 'sybase'), TRUE))
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{
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$this->subdriver = 'dblib';
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}
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elseif ($this->subdriver === '4D')
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{
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$this->subdriver = '4d';
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}
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elseif ( ! in_array($this->subdriver, array('4d', 'cubrid', 'dblib', 'firebird', 'ibm', 'informix', 'mysql', 'oci', 'odbc', 'pgsql', 'sqlite', 'sqlsrv'), TRUE))
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{
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log_message('error', 'PDO: Invalid or non-existent subdriver');
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if ($this->db_debug)
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{
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show_error('Invalid or non-existent PDO subdriver');
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}
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}
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$this->dsn = NULL;
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}
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// --------------------------------------------------------------------
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/**
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* Database connection
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*
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* @param bool $persistent
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* @return object
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*/
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public function db_connect($persistent = FALSE)
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{
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if ($persistent === TRUE)
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{
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$this->options[PDO::ATTR_PERSISTENT] = TRUE;
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}
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try
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{
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return new PDO($this->dsn, $this->username, $this->password, $this->options);
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}
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catch (PDOException $e)
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{
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if ($this->db_debug && empty($this->failover))
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{
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$this->display_error($e->getMessage(), '', TRUE);
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}
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return FALSE;
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}
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}
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// --------------------------------------------------------------------
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/**
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* Database version number
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*
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* @return string
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*/
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public function version()
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{
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if (isset($this->data_cache['version']))
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{
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return $this->data_cache['version'];
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}
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// Not all subdrivers support the getAttribute() method
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try
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{
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return $this->data_cache['version'] = $this->conn_id->getAttribute(PDO::ATTR_SERVER_VERSION);
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}
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catch (PDOException $e)
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{
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return parent::version();
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}
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}
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// --------------------------------------------------------------------
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/**
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* Execute the query
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*
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* @param string $sql SQL query
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* @return mixed
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*/
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protected function _execute($sql)
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{
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return $this->conn_id->query($sql);
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}
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// --------------------------------------------------------------------
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/**
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* Begin Transaction
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*
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* @return bool
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*/
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protected function _trans_begin()
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{
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return $this->conn_id->beginTransaction();
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}
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// --------------------------------------------------------------------
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/**
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* Commit Transaction
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*
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* @return bool
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*/
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protected function _trans_commit()
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{
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return $this->conn_id->commit();
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}
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// --------------------------------------------------------------------
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/**
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* Rollback Transaction
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*
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* @return bool
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*/
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protected function _trans_rollback()
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{
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return $this->conn_id->rollBack();
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}
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// --------------------------------------------------------------------
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/**
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* Platform-dependent string escape
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*
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* @param string
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* @return string
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*/
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protected function _escape_str($str)
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{
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// Escape the string
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$str = $this->conn_id->quote($str);
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// If there are duplicated quotes, trim them away
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return ($str[0] === "'")
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? substr($str, 1, -1)
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: $str;
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}
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// --------------------------------------------------------------------
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/**
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* Affected Rows
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*
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* @return int
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*/
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public function affected_rows()
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{
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return is_object($this->result_id) ? $this->result_id->rowCount() : 0;
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}
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// --------------------------------------------------------------------
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/**
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* Insert ID
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*
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* @param string $name
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* @return int
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*/
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public function insert_id($name = NULL)
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{
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return $this->conn_id->lastInsertId($name);
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}
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// --------------------------------------------------------------------
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/**
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* Field data query
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*
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* Generates a platform-specific query so that the column data can be retrieved
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*
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* @param string $table
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* @return string
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*/
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protected function _field_data($table)
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{
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return 'SELECT TOP 1 * FROM '.$this->protect_identifiers($table);
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}
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// --------------------------------------------------------------------
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/**
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* Error
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*
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* Returns an array containing code and message of the last
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* database error that has occurred.
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*
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* @return array
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*/
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public function error()
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{
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$error = array('code' => '00000', 'message' => '');
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$pdo_error = $this->conn_id->errorInfo();
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if (empty($pdo_error[0]))
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{
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return $error;
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}
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$error['code'] = isset($pdo_error[1]) ? $pdo_error[0].'/'.$pdo_error[1] : $pdo_error[0];
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if (isset($pdo_error[2]))
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{
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$error['message'] = $pdo_error[2];
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}
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return $error;
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}
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// --------------------------------------------------------------------
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/**
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* Truncate statement
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*
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* Generates a platform-specific truncate string from the supplied data
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*
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* If the database does not support the TRUNCATE statement,
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* then this method maps to 'DELETE FROM table'
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*
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* @param string $table
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* @return string
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*/
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protected function _truncate($table)
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{
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return 'TRUNCATE TABLE '.$table;
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}
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}
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