<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed'); /** * 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 - 2012, 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 */ /** * Database Utility Class * * @category Database * @author EllisLab Dev Team * @link http://codeigniter.com/user_guide/database/ */ class CI_DB_utility extends CI_DB_forge { public $db; public $data_cache = array(); public function __construct() { // Assign the main database object to $this->db $CI =& get_instance(); $this->db =& $CI->db; log_message('debug', 'Database Utility Class Initialized'); } // -------------------------------------------------------------------- /** * List databases * * @return bool */ public function list_databases() { // Is there a cached result? if (isset($this->data_cache['db_names'])) { return $this->data_cache['db_names']; } $query = $this->db->query($this->_list_databases()); $dbs = array(); if ($query->num_rows() > 0) { foreach ($query->result_array() as $row) { $dbs[] = current($row); } } return $this->data_cache['db_names'] = $dbs; } // -------------------------------------------------------------------- /** * Determine if a particular database exists * * @param string * @return boolean */ public function database_exists($database_name) { // Some databases won't have access to the list_databases() function, so // this is intended to allow them to override with their own functions as // defined in $driver_utility.php if (method_exists($this, '_database_exists')) { return $this->_database_exists($database_name); } else { return ( ! in_array($database_name, $this->list_databases())) ? FALSE : TRUE; } } // -------------------------------------------------------------------- /** * Optimize Table * * @param string the table name * @return bool */ public function optimize_table($table_name) { $sql = $this->_optimize_table($table_name); if (is_bool($sql)) { show_error('db_must_use_set'); return FALSE; } $query = $this->db->query($sql); $res = $query->result_array(); // Note: Due to a bug in current() that affects some versions // of PHP we can not pass function call directly into it return current($res); } // -------------------------------------------------------------------- /** * Optimize Database * * @return array */ public function optimize_database() { $result = array(); foreach ($this->db->list_tables() as $table_name) { $sql = $this->_optimize_table($table_name); if (is_bool($sql)) { return $sql; } $query = $this->db->query($sql); // Build the result array... // Note: Due to a bug in current() that affects some versions // of PHP we can not pass function call directly into it $res = $query->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 $result; } // -------------------------------------------------------------------- /** * Repair Table * * @param string the table name * @return bool */ public function repair_table($table_name) { $sql = $this->_repair_table($table_name); if (is_bool($sql)) { return $sql; } $query = $this->db->query($sql); // Note: Due to a bug in current() that affects some versions // of PHP we can not pass function call directly into it $res = $query->result_array(); return current($res); } // -------------------------------------------------------------------- /** * Generate CSV from a query result object * * @param object The query result object * @param string The delimiter - comma by default * @param string The newline character - \n by default * @param string The enclosure - double quote by 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; } $out = rtrim($out).$newline; // Next blast through the result array and build out the rows foreach ($query->result_array() as $row) { foreach ($row as $item) { $out .= $enclosure.str_replace($enclosure, $enclosure.$enclosure, $item).$enclosure.$delim; } $out = rtrim($out).$newline; } return $out; } // -------------------------------------------------------------------- /** * Generate XML data from a query result object * * @param object The query result object * @param array Any preferences * @return string */ public function xml_from_result($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 $CI =& get_instance(); $CI->load->helper('xml'); // Generate the result $xml = "<{$root}>".$newline; foreach ($query->result_array() as $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>".$newline; } // -------------------------------------------------------------------- /** * Database Backup * * @return void */ public function backup($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 $prefs = array( 'tables' => array(), 'ignore' => array(), 'filename' => '', 'format' => 'gzip', // gzip, zip, txt 'add_drop' => TRUE, 'add_insert' => TRUE, 'newline' => "\n" ); // Did the user submit any preferences? If so set them.... if (count($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' AND ! @function_exists('gzencode')) OR ($prefs['format'] === 'zip' AND ! @function_exists('gzcompress'))) { if ($this->db->db_debug) { return $this->db->display_error('db_unsuported_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; } } /* End of file DB_utility.php */ /* Location: ./system/database/DB_utility.php */