BACKUP DB CI

BACKUP DB CI

system\database\drivers\mysqli\mysqli_utility.php
```
	/**
	 * MySQLi Export
	 *
	 * @access  private
	 * @param   array   Preferences
	 * @return  mixed
	 * @source https://stackoverflow.com/a/44667873
	 */
    function _backup($params = array())
    {
        // Currently unsupported
        //---return $this->db->display_error('db_unsuported_feature');

        if (count($params) == 0)
        {
            return FALSE;
        }

        // Extract the prefs for simplicity
        extract($params);

        // Build the output
        $output = '';
        foreach ((array)$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->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)
            {
                $output .= 'DROP TABLE IF EXISTS '.$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 $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 = mysqli_fetch_field($query->result_id))
            {
                // Most versions of MySQL store timestamp as a string
                $is_int[$i] = (in_array(
                                        //strtolower(mysqli_field_type($query->result_id, $i)),
                                        strtolower($field->type),
                                        array('tinyint', 'smallint', 'mediumint', 'int', 'bigint'), //, 'timestamp'),
                                        TRUE)
                                        ) ? TRUE : FALSE;

                // Create a string of field names
                $field_str .= '`'.$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)
                    {
                        $val_str .= 'NULL';
                    }
                    else
                    {
                        // Escape the data if it's not an integer
                        if ($is_int[$i] == FALSE)
                        {
                            $val_str .= $this->db->escape($v);
                        }
                        else
                        {
                            $val_str .= $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
                $output .= 'INSERT INTO '.$table.' ('.$field_str.') VALUES ('.$val_str.');'.$newline;
            }

            $output .= $newline.$newline;
        }

        return $output;

    }
```

```
        $this->load->helper(array('form', 'url', 'file', 'download'));

        $this->db = $this->load->database('website', TRUE); // the TRUE paramater tells CI that you'd like to return the database object.   

        $prefs = array(
            'tables' => array('user'), // Array of tables to backup.
            'ignore' => array(), // List of tables to omit from the backup
            'format' => 'zip', // gzip, zip, txt
            'filename' => 'backup_' . date("Y-m-d-H-i-s") . '.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
        );

        $this->load->dbutil($this->db, TRUE); 
        $backup = $this->dbutil->backup($prefs);

        $db_name = 'backup-on-' . date("Y-m-d-H-i-s") . '.zip';
        $backup_path = APPPATH.'/assets/backup/'; // this is the destination directory name
        if (!file_exists($backup_path)) {
            mkdir($backup_path, 0755, true);
        }
        $save = $backup_path . $db_name;
        $this->load->helper('file');
        write_file($save, $backup);
```