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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 1.0.0
* @filesource
*/
defined('BASEPATH') OR exit('No direct script access allowed');
/**
* MySQL Utility Class
*
* @category Database
* @author EllisLab Dev Team
* @link https://codeigniter.com/user_guide/database/
*/
class CI_DB_mysql_utility extends CI_DB_utility {
/**
* List databases statement
*
* @var string
*/
protected $_list_databases = 'SHOW DATABASES';
/**
* OPTIMIZE TABLE statement
*
* @var string
*/
protected $_optimize_table = 'OPTIMIZE TABLE %s';
/**
* REPAIR TABLE statement
*
* @var string
*/
protected $_repair_table = 'REPAIR TABLE %s';
// --------------------------------------------------------------------
/**
* Export
*
* @param array $params Preferences
* @return mixed
*/
protected function _backup($params = array())
{
if (count($params) === 0)
{
return FALSE;
}
// Extract the prefs for simplicity
extract($params);
// Build the output
$output = '';
// Do we need to include a statement to disable foreign key checks?
if ($foreign_key_checks === FALSE)
{
$output .= 'SET foreign_key_checks = 0;'.$newline;
}
foreach ( (array) $tables as $table)
{
// Is the table in the "ignore" list?
if (in_array($table, (array) $ignore, TRUE))
{
continue;
}
// Get the table schema
$query = $this->db->query('SHOW CREATE TABLE '.$this->db->escape_identifiers($this->db->database.'.'.$table));
// No result means the table name was invalid
if ($query === FALSE)
{
continue;
}
// Write out the table schema
$output .= '#'.$newline.'# TABLE STRUCTURE FOR: '.$table.$newline.'#'.$newline.$newline;
if ($add_drop === TRUE)
{
$output .= 'DROP TABLE IF EXISTS '.$this->db->protect_identifiers($table).';'.$newline.$newline;
}
$i = 0;
$result = $query->result_array();
foreach ($result[0] as $val)
{
if ($i++ % 2)
{
$output .= $val.';'.$newline.$newline;
}
}
// If inserts are not needed we're done...
if ($add_insert === FALSE)
{
continue;
}
// Grab all the data from the current table
$query = $this->db->query('SELECT * FROM '.$this->db->protect_identifiers($table));
if ($query->num_rows() === 0)
{
continue;
}
// Fetch the field names and determine if the field is an
// integer type. We use this info to decide whether to
// surround the data with quotes or not
$i = 0;
$field_str = '';
$is_int = array();
while ($field = mysql_fetch_field($query->result_id))
{
// Most versions of MySQL store timestamp as a string
$is_int[$i] = in_array(strtolower(mysql_field_type($query->result_id, $i)),
array('tinyint', 'smallint', 'mediumint', 'int', 'bigint'), //, 'timestamp'),
TRUE);
// Create a string of field names
$field_str .= $this->db->escape_identifiers($field->name).', ';
$i++;
}
// Trim off the end comma
$field_str = preg_replace('/, $/' , '', $field_str);
// Build the insert string
foreach ($query->result_array() as $row)
{
$val_str = '';
$i = 0;
foreach ($row as $v)
{
// Is the value NULL?
if ($v === NULL)
{
$val_str .= 'NULL';
}
else
{
// Escape the data if it's not an integer
$val_str .= ($is_int[$i] === FALSE) ? $this->db->escape($v) : $v;
}
// Append a comma
$val_str .= ', ';
$i++;
}
// Remove the comma at the end of the string
$val_str = preg_replace('/, $/' , '', $val_str);
// Build the INSERT string
$output .= 'INSERT INTO '.$this->db->protect_identifiers($table).' ('.$field_str.') VALUES ('.$val_str.');'.$newline;
}
$output .= $newline.$newline;
}
// Do we need to include a statement to re-enable foreign key checks?
if ($foreign_key_checks === FALSE)
{
$output .= 'SET foreign_key_checks = 1;'.$newline;
}
return $output;
}
}