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414 lines
9.6 KiB
414 lines
9.6 KiB
<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed'); |
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/** |
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* Code Igniter |
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* |
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* An open source application development framework for PHP 5.1.6 or newer |
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* |
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* @package CodeIgniter |
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* @author ExpressionEngine Dev Team |
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* @copyright Copyright (c) 2008 - 2011, EllisLab, Inc. |
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* @license http://codeigniter.com/user_guide/license.html |
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* @link http://codeigniter.com |
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* @since Version 1.0 |
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* @filesource |
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*/ |
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// ------------------------------------------------------------------------ |
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/** |
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* Database Utility Class |
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* |
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* @category Database |
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* @author ExpressionEngine Dev Team |
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* @link http://codeigniter.com/user_guide/database/ |
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*/ |
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class CI_DB_utility extends CI_DB_forge { |
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var $db; |
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var $data_cache = array(); |
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/** |
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* Constructor |
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* |
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* Grabs the CI super object instance so we can access it. |
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* |
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*/ |
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function __construct() |
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{ |
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// Assign the main database object to $this->db |
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$CI =& get_instance(); |
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$this->db =& $CI->db; |
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log_message('debug', "Database Utility Class Initialized"); |
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} |
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// -------------------------------------------------------------------- |
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/** |
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* List databases |
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* |
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* @access public |
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* @return bool |
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*/ |
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function list_databases() |
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{ |
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// Is there a cached result? |
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if (isset($this->data_cache['db_names'])) |
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{ |
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return $this->data_cache['db_names']; |
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} |
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$query = $this->db->query($this->_list_databases()); |
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$dbs = array(); |
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if ($query->num_rows() > 0) |
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{ |
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foreach ($query->result_array() as $row) |
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{ |
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$dbs[] = current($row); |
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} |
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} |
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$this->data_cache['db_names'] = $dbs; |
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return $this->data_cache['db_names']; |
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} |
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// -------------------------------------------------------------------- |
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/** |
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* Determine if a particular database exists |
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* |
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* @access public |
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* @param string |
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* @return boolean |
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*/ |
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function database_exists($database_name) |
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{ |
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// Some databases won't have access to the list_databases() function, so |
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// this is intended to allow them to override with their own functions as |
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// defined in $driver_utility.php |
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if (method_exists($this, '_database_exists')) |
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{ |
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return $this->_database_exists($database_name); |
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} |
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else |
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{ |
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return ( ! in_array($database_name, $this->list_databases())) ? FALSE : TRUE; |
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} |
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} |
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// -------------------------------------------------------------------- |
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/** |
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* Optimize Table |
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* |
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* @access public |
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* @param string the table name |
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* @return bool |
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*/ |
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function optimize_table($table_name) |
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{ |
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$sql = $this->_optimize_table($table_name); |
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if (is_bool($sql)) |
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{ |
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show_error('db_must_use_set'); |
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} |
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$query = $this->db->query($sql); |
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$res = $query->result_array(); |
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// Note: Due to a bug in current() that affects some versions |
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// of PHP we can not pass function call directly into it |
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return current($res); |
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} |
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// -------------------------------------------------------------------- |
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/** |
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* Optimize Database |
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* |
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* @access public |
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* @return array |
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*/ |
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function optimize_database() |
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{ |
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$result = array(); |
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foreach ($this->db->list_tables() as $table_name) |
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{ |
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$sql = $this->_optimize_table($table_name); |
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if (is_bool($sql)) |
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{ |
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return $sql; |
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} |
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$query = $this->db->query($sql); |
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// Build the result array... |
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// Note: Due to a bug in current() that affects some versions |
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// of PHP we can not pass function call directly into it |
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$res = $query->result_array(); |
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$res = current($res); |
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$key = str_replace($this->db->database.'.', '', current($res)); |
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$keys = array_keys($res); |
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unset($res[$keys[0]]); |
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$result[$key] = $res; |
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} |
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return $result; |
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} |
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// -------------------------------------------------------------------- |
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/** |
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* Repair Table |
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* |
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* @access public |
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* @param string the table name |
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* @return bool |
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*/ |
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function repair_table($table_name) |
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{ |
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$sql = $this->_repair_table($table_name); |
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if (is_bool($sql)) |
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{ |
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return $sql; |
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} |
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$query = $this->db->query($sql); |
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// Note: Due to a bug in current() that affects some versions |
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// of PHP we can not pass function call directly into it |
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$res = $query->result_array(); |
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return current($res); |
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} |
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// -------------------------------------------------------------------- |
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/** |
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* Generate CSV from a query result object |
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* |
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* @access public |
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* @param object The query result object |
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* @param string The delimiter - comma by default |
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* @param string The newline character - \n by default |
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* @param string The enclosure - double quote by default |
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* @return string |
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*/ |
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function csv_from_result($query, $delim = ",", $newline = "\n", $enclosure = '"') |
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{ |
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if ( ! is_object($query) OR ! method_exists($query, 'list_fields')) |
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{ |
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show_error('You must submit a valid result object'); |
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} |
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$out = ''; |
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// First generate the headings from the table column names |
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foreach ($query->list_fields() as $name) |
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{ |
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$out .= $enclosure.str_replace($enclosure, $enclosure.$enclosure, $name).$enclosure.$delim; |
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} |
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$out = rtrim($out); |
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$out .= $newline; |
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// Next blast through the result array and build out the rows |
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foreach ($query->result_array() as $row) |
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{ |
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foreach ($row as $item) |
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{ |
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$out .= $enclosure.str_replace($enclosure, $enclosure.$enclosure, $item).$enclosure.$delim; |
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} |
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$out = rtrim($out); |
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$out .= $newline; |
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} |
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return $out; |
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} |
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// -------------------------------------------------------------------- |
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/** |
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* Generate XML data from a query result object |
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* |
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* @access public |
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* @param object The query result object |
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* @param array Any preferences |
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* @return string |
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*/ |
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function xml_from_result($query, $params = array()) |
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{ |
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if ( ! is_object($query) OR ! method_exists($query, 'list_fields')) |
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{ |
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show_error('You must submit a valid result object'); |
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} |
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// Set our default values |
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foreach (array('root' => 'root', 'element' => 'element', 'newline' => "\n", 'tab' => "\t") as $key => $val) |
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{ |
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if ( ! isset($params[$key])) |
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{ |
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$params[$key] = $val; |
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} |
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} |
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// Create variables for convenience |
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extract($params); |
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// Load the xml helper |
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$CI =& get_instance(); |
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$CI->load->helper('xml'); |
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// Generate the result |
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$xml = "<{$root}>".$newline; |
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foreach ($query->result_array() as $row) |
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{ |
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$xml .= $tab."<{$element}>".$newline; |
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foreach ($row as $key => $val) |
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{ |
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$xml .= $tab.$tab."<{$key}>".xml_convert($val)."</{$key}>".$newline; |
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} |
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$xml .= $tab."</{$element}>".$newline; |
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} |
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$xml .= "</$root>".$newline; |
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return $xml; |
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} |
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// -------------------------------------------------------------------- |
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/** |
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* Database Backup |
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* |
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* @access public |
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* @return void |
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*/ |
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function backup($params = array()) |
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{ |
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// If the parameters have not been submitted as an |
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// array then we know that it is simply the table |
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// name, which is a valid short cut. |
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if (is_string($params)) |
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{ |
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$params = array('tables' => $params); |
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} |
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// ------------------------------------------------------ |
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// Set up our default preferences |
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$prefs = array( |
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'tables' => array(), |
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'ignore' => array(), |
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'filename' => '', |
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'format' => 'gzip', // gzip, zip, txt |
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'add_drop' => TRUE, |
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'add_insert' => TRUE, |
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'newline' => "\n" |
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); |
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// Did the user submit any preferences? If so set them.... |
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if (count($params) > 0) |
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{ |
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foreach ($prefs as $key => $val) |
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{ |
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if (isset($params[$key])) |
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{ |
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$prefs[$key] = $params[$key]; |
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} |
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} |
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} |
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// ------------------------------------------------------ |
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// Are we backing up a complete database or individual tables? |
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// If no table names were submitted we'll fetch the entire table list |
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if (count($prefs['tables']) == 0) |
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{ |
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$prefs['tables'] = $this->db->list_tables(); |
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} |
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// ------------------------------------------------------ |
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// Validate the format |
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if ( ! in_array($prefs['format'], array('gzip', 'zip', 'txt'), TRUE)) |
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{ |
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$prefs['format'] = 'txt'; |
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} |
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// ------------------------------------------------------ |
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// Is the encoder supported? If not, we'll either issue an |
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// error or use plain text depending on the debug settings |
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if (($prefs['format'] == 'gzip' AND ! @function_exists('gzencode')) |
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OR ($prefs['format'] == 'zip' AND ! @function_exists('gzcompress'))) |
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{ |
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if ($this->db->db_debug) |
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{ |
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return $this->db->display_error('db_unsuported_compression'); |
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} |
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$prefs['format'] = 'txt'; |
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} |
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// ------------------------------------------------------ |
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// Set the filename if not provided - Only needed with Zip files |
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if ($prefs['filename'] == '' AND $prefs['format'] == 'zip') |
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{ |
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$prefs['filename'] = (count($prefs['tables']) == 1) ? $prefs['tables'] : $this->db->database; |
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$prefs['filename'] .= '_'.date('Y-m-d_H-i', time()); |
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} |
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// ------------------------------------------------------ |
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// Was a Gzip file requested? |
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if ($prefs['format'] == 'gzip') |
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{ |
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return gzencode($this->_backup($prefs)); |
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} |
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// ------------------------------------------------------ |
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// Was a text file requested? |
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if ($prefs['format'] == 'txt') |
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{ |
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return $this->_backup($prefs); |
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} |
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// ------------------------------------------------------ |
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// Was a Zip file requested? |
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if ($prefs['format'] == 'zip') |
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{ |
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// If they included the .zip file extension we'll remove it |
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if (preg_match("|.+?\.zip$|", $prefs['filename'])) |
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{ |
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$prefs['filename'] = str_replace('.zip', '', $prefs['filename']); |
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} |
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// Tack on the ".sql" file extension if needed |
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if ( ! preg_match("|.+?\.sql$|", $prefs['filename'])) |
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{ |
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$prefs['filename'] .= '.sql'; |
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} |
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// Load the Zip class and output it |
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$CI =& get_instance(); |
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$CI->load->library('zip'); |
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$CI->zip->add_data($prefs['filename'], $this->_backup($prefs)); |
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return $CI->zip->get_zip(); |
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} |
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} |
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} |
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/* End of file DB_utility.php */ |
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/* Location: ./system/database/DB_utility.php */ |