php - Getting the values from array -

i new codeigniter. in model, have following code:

public function get_all_subjects() {    return $this->db->get('subjects'); } 

in controller, have:

public function index() {    $this->load->model('subjects');    $data['content'] = $this->subjects->get_all_subjects();     $this->load->view('home', $data); } 

i trying values in view:

foreach($content $val) {    echo $val['subject']; //i getting error, message: undefined index: subject } 

the fields in subjects table subject_id , subject.

i getting error message:

undefined index: subject

public function get_all_subjects()     {         return $this->db->get('subjects')->result_array();     } 

you not returning result query. have run query.