425 lines
11 KiB
PHP
425 lines
11 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 1.0.0
|
|
* @filesource
|
|
*/
|
|
defined('BASEPATH') OR exit('No direct script access allowed');
|
|
|
|
/**
|
|
* Database Utility Class
|
|
*
|
|
* @category Database
|
|
* @author EllisLab Dev Team
|
|
* @link https://codeigniter.com/user_guide/database/
|
|
*/
|
|
abstract class CI_DB_utility {
|
|
|
|
/**
|
|
* Database object
|
|
*
|
|
* @var object
|
|
*/
|
|
protected $db;
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* List databases statement
|
|
*
|
|
* @var string
|
|
*/
|
|
protected $_list_databases = FALSE;
|
|
|
|
/**
|
|
* OPTIMIZE TABLE statement
|
|
*
|
|
* @var string
|
|
*/
|
|
protected $_optimize_table = FALSE;
|
|
|
|
/**
|
|
* REPAIR TABLE statement
|
|
*
|
|
* @var string
|
|
*/
|
|
protected $_repair_table = FALSE;
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* Class constructor
|
|
*
|
|
* @param object &$db Database object
|
|
* @return void
|
|
*/
|
|
public function __construct(&$db)
|
|
{
|
|
$this->db =& $db;
|
|
log_message('info', 'Database Utility Class Initialized');
|
|
}
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* List databases
|
|
*
|
|
* @return array
|
|
*/
|
|
public function list_databases()
|
|
{
|
|
// Is there a cached result?
|
|
if (isset($this->db->data_cache['db_names']))
|
|
{
|
|
return $this->db->data_cache['db_names'];
|
|
}
|
|
elseif ($this->_list_databases === FALSE)
|
|
{
|
|
return ($this->db->db_debug) ? $this->db->display_error('db_unsupported_feature') : FALSE;
|
|
}
|
|
|
|
$this->db->data_cache['db_names'] = array();
|
|
|
|
$query = $this->db->query($this->_list_databases);
|
|
if ($query === FALSE)
|
|
{
|
|
return $this->db->data_cache['db_names'];
|
|
}
|
|
|
|
for ($i = 0, $query = $query->result_array(), $c = count($query); $i < $c; $i++)
|
|
{
|
|
$this->db->data_cache['db_names'][] = current($query[$i]);
|
|
}
|
|
|
|
return $this->db->data_cache['db_names'];
|
|
}
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* Determine if a particular database exists
|
|
*
|
|
* @param string $database_name
|
|
* @return bool
|
|
*/
|
|
public function database_exists($database_name)
|
|
{
|
|
return in_array($database_name, $this->list_databases());
|
|
}
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* Optimize Table
|
|
*
|
|
* @param string $table_name
|
|
* @return mixed
|
|
*/
|
|
public function optimize_table($table_name)
|
|
{
|
|
if ($this->_optimize_table === FALSE)
|
|
{
|
|
return ($this->db->db_debug) ? $this->db->display_error('db_unsupported_feature') : FALSE;
|
|
}
|
|
|
|
$query = $this->db->query(sprintf($this->_optimize_table, $this->db->escape_identifiers($table_name)));
|
|
if ($query !== FALSE)
|
|
{
|
|
$query = $query->result_array();
|
|
return current($query);
|
|
}
|
|
|
|
return FALSE;
|
|
}
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* Optimize Database
|
|
*
|
|
* @return mixed
|
|
*/
|
|
public function optimize_database()
|
|
{
|
|
if ($this->_optimize_table === FALSE)
|
|
{
|
|
return ($this->db->db_debug) ? $this->db->display_error('db_unsupported_feature') : FALSE;
|
|
}
|
|
|
|
$result = array();
|
|
foreach ($this->db->list_tables() as $table_name)
|
|
{
|
|
$res = $this->db->query(sprintf($this->_optimize_table, $this->db->escape_identifiers($table_name)));
|
|
if (is_bool($res))
|
|
{
|
|
return $res;
|
|
}
|
|
|
|
// Build the result array...
|
|
$res = $res->result_array();
|
|
$res = current($res);
|
|
$key = str_replace($this->db->database.'.', '', current($res));
|
|
$keys = array_keys($res);
|
|
unset($res[$keys[0]]);
|
|
|
|
$result[$key] = $res;
|
|
}
|
|
|
|
return $result;
|
|
}
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* Repair Table
|
|
*
|
|
* @param string $table_name
|
|
* @return mixed
|
|
*/
|
|
public function repair_table($table_name)
|
|
{
|
|
if ($this->_repair_table === FALSE)
|
|
{
|
|
return ($this->db->db_debug) ? $this->db->display_error('db_unsupported_feature') : FALSE;
|
|
}
|
|
|
|
$query = $this->db->query(sprintf($this->_repair_table, $this->db->escape_identifiers($table_name)));
|
|
if (is_bool($query))
|
|
{
|
|
return $query;
|
|
}
|
|
|
|
$query = $query->result_array();
|
|
return current($query);
|
|
}
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* Generate CSV from a query result object
|
|
*
|
|
* @param object $query Query result object
|
|
* @param string $delim Delimiter (default: ,)
|
|
* @param string $newline Newline character (default: \n)
|
|
* @param string $enclosure Enclosure (default: ")
|
|
* @return string
|
|
*/
|
|
public function csv_from_result($query, $delim = ',', $newline = "\n", $enclosure = '"')
|
|
{
|
|
if ( ! is_object($query) OR ! method_exists($query, 'list_fields'))
|
|
{
|
|
show_error('You must submit a valid result object');
|
|
}
|
|
|
|
$out = '';
|
|
// First generate the headings from the table column names
|
|
foreach ($query->list_fields() as $name)
|
|
{
|
|
$out .= $enclosure.str_replace($enclosure, $enclosure.$enclosure, $name).$enclosure.$delim;
|
|
}
|
|
|
|
$out = substr($out, 0, -strlen($delim)).$newline;
|
|
|
|
// Next blast through the result array and build out the rows
|
|
while ($row = $query->unbuffered_row('array'))
|
|
{
|
|
$line = array();
|
|
foreach ($row as $item)
|
|
{
|
|
$line[] = $enclosure.str_replace($enclosure, $enclosure.$enclosure, $item).$enclosure;
|
|
}
|
|
$out .= implode($delim, $line).$newline;
|
|
}
|
|
|
|
return $out;
|
|
}
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* Generate XML data from a query result object
|
|
*
|
|
* @param object $query Query result object
|
|
* @param array $params Any preferences
|
|
* @return string
|
|
*/
|
|
public function xml_from_result($query, $params = array())
|
|
{
|
|
if ( ! is_object($query) OR ! method_exists($query, 'list_fields'))
|
|
{
|
|
show_error('You must submit a valid result object');
|
|
}
|
|
|
|
// Set our default values
|
|
foreach (array('root' => 'root', 'element' => 'element', 'newline' => "\n", 'tab' => "\t") as $key => $val)
|
|
{
|
|
if ( ! isset($params[$key]))
|
|
{
|
|
$params[$key] = $val;
|
|
}
|
|
}
|
|
|
|
// Create variables for convenience
|
|
extract($params);
|
|
|
|
// Load the xml helper
|
|
get_instance()->load->helper('xml');
|
|
|
|
// Generate the result
|
|
$xml = '<'.$root.'>'.$newline;
|
|
while ($row = $query->unbuffered_row())
|
|
{
|
|
$xml .= $tab.'<'.$element.'>'.$newline;
|
|
foreach ($row as $key => $val)
|
|
{
|
|
$xml .= $tab.$tab.'<'.$key.'>'.xml_convert($val).'</'.$key.'>'.$newline;
|
|
}
|
|
$xml .= $tab.'</'.$element.'>'.$newline;
|
|
}
|
|
|
|
return $xml.'</'.$root.'>'.$newline;
|
|
}
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* Database Backup
|
|
*
|
|
* @param array $params
|
|
* @return string
|
|
*/
|
|
public function backup($params = array())
|
|
{
|
|
// If the parameters have not been submitted as an
|
|
// array then we know that it is simply the table
|
|
// name, which is a valid short cut.
|
|
if (is_string($params))
|
|
{
|
|
$params = array('tables' => $params);
|
|
}
|
|
|
|
// Set up our default preferences
|
|
$prefs = array(
|
|
'tables' => array(),
|
|
'ignore' => array(),
|
|
'filename' => '',
|
|
'format' => 'gzip', // gzip, zip, txt
|
|
'add_drop' => TRUE,
|
|
'add_insert' => TRUE,
|
|
'newline' => "\n",
|
|
'foreign_key_checks' => TRUE
|
|
);
|
|
|
|
// Did the user submit any preferences? If so set them....
|
|
if (count($params) > 0)
|
|
{
|
|
foreach ($prefs as $key => $val)
|
|
{
|
|
if (isset($params[$key]))
|
|
{
|
|
$prefs[$key] = $params[$key];
|
|
}
|
|
}
|
|
}
|
|
|
|
// Are we backing up a complete database or individual tables?
|
|
// If no table names were submitted we'll fetch the entire table list
|
|
if (count($prefs['tables']) === 0)
|
|
{
|
|
$prefs['tables'] = $this->db->list_tables();
|
|
}
|
|
|
|
// Validate the format
|
|
if ( ! in_array($prefs['format'], array('gzip', 'zip', 'txt'), TRUE))
|
|
{
|
|
$prefs['format'] = 'txt';
|
|
}
|
|
|
|
// Is the encoder supported? If not, we'll either issue an
|
|
// error or use plain text depending on the debug settings
|
|
if (($prefs['format'] === 'gzip' && ! function_exists('gzencode'))
|
|
OR ($prefs['format'] === 'zip' && ! function_exists('gzcompress')))
|
|
{
|
|
if ($this->db->db_debug)
|
|
{
|
|
return $this->db->display_error('db_unsupported_compression');
|
|
}
|
|
|
|
$prefs['format'] = 'txt';
|
|
}
|
|
|
|
// Was a Zip file requested?
|
|
if ($prefs['format'] === 'zip')
|
|
{
|
|
// Set the filename if not provided (only needed with Zip files)
|
|
if ($prefs['filename'] === '')
|
|
{
|
|
$prefs['filename'] = (count($prefs['tables']) === 1 ? $prefs['tables'] : $this->db->database)
|
|
.date('Y-m-d_H-i', time()).'.sql';
|
|
}
|
|
else
|
|
{
|
|
// If they included the .zip file extension we'll remove it
|
|
if (preg_match('|.+?\.zip$|', $prefs['filename']))
|
|
{
|
|
$prefs['filename'] = str_replace('.zip', '', $prefs['filename']);
|
|
}
|
|
|
|
// Tack on the ".sql" file extension if needed
|
|
if ( ! preg_match('|.+?\.sql$|', $prefs['filename']))
|
|
{
|
|
$prefs['filename'] .= '.sql';
|
|
}
|
|
}
|
|
|
|
// Load the Zip class and output it
|
|
$CI =& get_instance();
|
|
$CI->load->library('zip');
|
|
$CI->zip->add_data($prefs['filename'], $this->_backup($prefs));
|
|
return $CI->zip->get_zip();
|
|
}
|
|
elseif ($prefs['format'] === 'txt') // Was a text file requested?
|
|
{
|
|
return $this->_backup($prefs);
|
|
}
|
|
elseif ($prefs['format'] === 'gzip') // Was a Gzip file requested?
|
|
{
|
|
return gzencode($this->_backup($prefs));
|
|
}
|
|
|
|
return;
|
|
}
|
|
|
|
}
|