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+######################
+Database Utility Class
+######################
+
+The Database Utility Class contains functions that help you manage your
+database.
+
+.. contents:: Table of Contents
+
+
+******************
+Function Reference
+******************
+
+Initializing the Utility Class
+==============================
+
+.. important:: In order to initialize the Utility class, your database
+	driver must already be running, since the utilities class relies on it.
+
+Load the Utility Class as follows::
+
+	$this->load->dbutil()
+
+Once initialized you will access the functions using the $this->dbutil
+object::
+
+	$this->dbutil->some_function()
+
+$this->dbutil->list_databases()
+================================
+
+Returns an array of database names::
+
+	 $dbs = $this->dbutil->list_databases();  foreach ($dbs as $db) {     echo $db; }
+
+$this->dbutil->database_exists();
+==================================
+
+Sometimes it's helpful to know whether a particular database exists.
+Returns a boolean TRUE/FALSE. Usage example::
+
+	 if ($this->dbutil->database_exists('database_name')) {    // some code... }
+
+Note: Replace *database_name* with the name of the table you are
+looking for. This function is case sensitive.
+
+$this->dbutil->optimize_table('table_name');
+==============================================
+
+.. note:: This features is only available for MySQL/MySQLi databases.
+
+Permits you to optimize a table using the table name specified in the
+first parameter. Returns TRUE/FALSE based on success or failure::
+
+	 if ($this->dbutil->optimize_table('table_name')) {     echo 'Success!'; }
+
+.. note:: Not all database platforms support table optimization.
+
+$this->dbutil->repair_table('table_name');
+============================================
+
+.. note:: This features is only available for MySQL/MySQLi databases.
+
+Permits you to repair a table using the table name specified in the
+first parameter. Returns TRUE/FALSE based on success or failure::
+
+	 if ($this->dbutil->repair_table('table_name')) {     echo 'Success!'; }
+
+.. note:: Not all database platforms support table repairs.
+
+$this->dbutil->optimize_database();
+====================================
+
+.. note:: This features is only available for MySQL/MySQLi databases.
+
+Permits you to optimize the database your DB class is currently
+connected to. Returns an array containing the DB status messages or
+FALSE on failure.
+
+::
+
+	 $result = $this->dbutil->optimize_database();  if ($result !== FALSE) {     print_r($result); }
+
+.. note:: Not all database platforms support table optimization.
+
+$this->dbutil->csv_from_result($db_result)
+=============================================
+
+Permits you to generate a CSV file from a query result. The first
+parameter of the function must contain the result object from your
+query. Example::
+
+	 $this->load->dbutil();  $query = $this->db->query("SELECT * FROM mytable");  echo $this->dbutil->csv_from_result($query);
+
+The second, third, and fourth parameters allow you to set the delimiter
+newline, and enclosure characters respectively. By default tabs are
+used as the delimiter, "\n" is used as a new line, and a double-quote
+is used as the enclosure. Example::
+
+	$delimiter = ",";
+	$newline = "\r\n";
+	$enclosure = '"';
+
+	echo $this->dbutil->csv_from_result($query, $delimiter, $newline, $enclosure);
+
+.. important:: This function will NOT write the CSV file for you. It
+	simply creates the CSV layout. If you need to write the file
+	use the :doc:`File Helper <../helpers/file_helper>`.
+
+$this->dbutil->xml_from_result($db_result)
+=============================================
+
+Permits you to generate an XML file from a query result. The first
+parameter expects a query result object, the second may contain an
+optional array of config parameters. Example::
+
+	 $this->load->dbutil();  $query = $this->db->query("SELECT * FROM mytable");  $config = array (                   'root'    => 'root',                   'element' => 'element',                    'newline' => "\n",                    'tab'    => "\t"                 );  echo $this->dbutil->xml_from_result($query, $config);
+
+.. important:: This function will NOT write the XML file for you. It
+	simply creates the XML layout. If you need to write the file
+	use the :doc:`File Helper <../helpers/file_helper>`.
+
+$this->dbutil->backup()
+=======================
+
+Permits you to backup your full database or individual tables. The
+backup data can be compressed in either Zip or Gzip format.
+
+.. note:: This features is only available for MySQL databases.
+
+.. note:: Due to the limited execution time and memory available to PHP,
+	backing up very large databases may not be possible. If your database is
+	very large you might need to backup directly from your SQL server via
+	the command line, or have your server admin do it for you if you do not
+	have root privileges.
+
+Usage Example
+-------------
+
+::
+
+	 // Load the DB utility class $this->load->dbutil();  // Backup your entire database and assign it to a variable $backup =& $this->dbutil->backup();   // Load the file helper and write the file to your server $this->load->helper('file'); write_file('/path/to/mybackup.gz', $backup);   // Load the download helper and send the file to your desktop $this->load->helper('download'); force_download('mybackup.gz', $backup);
+
+Setting Backup Preferences
+--------------------------
+
+Backup preferences are set by submitting an array of values to the first
+parameter of the backup function. Example::
+
+	$prefs = array(                 'tables'      => array('table1', 'table2'),  // Array of tables to backup.                 'ignore'      => array(),           // List of tables to omit from the backup                 'format'      => 'txt',             // gzip, zip, txt                 'filename'    => 'mybackup.sql',    // File name - NEEDED ONLY WITH ZIP FILES                 'add_drop'    => TRUE,              // Whether to add DROP TABLE statements to backup file                 'add_insert'  => TRUE,              // Whether to add INSERT data to backup file                 'newline'     => "\n"               // Newline character used in backup file               );  $this->dbutil->backup($prefs);
+
+Description of Backup Preferences
+---------------------------------
+
+Preference
+Default Value
+Options
+Description
+**tables**
+empty array
+None
+An array of tables you want backed up. If left blank all tables will be
+exported.
+**ignore**
+empty array
+None
+An array of tables you want the backup routine to ignore.
+**format**
+gzip
+gzip, zip, txt
+The file format of the export file.
+**filename**
+the current date/time
+None
+The name of the backed-up file. The name is needed only if you are using
+zip compression.
+**add_drop**
+TRUE
+TRUE/FALSE
+Whether to include DROP TABLE statements in your SQL export file.
+**add_insert**
+TRUE
+TRUE/FALSE
+Whether to include INSERT statements in your SQL export file.
+**newline**
+"\\n"
+"\\n", "\\r", "\\r\\n"
+Type of newline to use in your SQL export file.