CI_DB_driver::update_string PHP Method

    public function update_string($table, $data, $where)
    {
        if (empty($where)) {
            return FALSE;
        }
        $this->where($where);
        $fields = array();
        foreach ($data as $key => $val) {
            $fields[$this->protect_identifiers($key)] = $this->escape($val);
        }
        $sql = $this->_update($this->protect_identifiers($table, TRUE, NULL, FALSE), $fields);
        $this->_reset_write();
        return $sql;
    }