Strtoupper

Let's say you have 2 input fields: 'city' and 'country'. You want to save both fields in uppercase in the 'cities' table.

Controller:

PHP Code:

$data = array(
   'city' => strtoupper($this->input->post('city')),
   'country' => strotupper($this->input->post('country'))
);
$this->db->insert('cities', $data);