Want to store multiple id's (dynamically) in session array of Codeignitor 2.x

Question

Need to store multiple id's dynamically in codeignitor session array. Array push seems to be not working. Am able to add only one id. Any help?

Code is below:

$internships_array['internships'][] = $internship_result['id'];
if (empty($this->session->userdata('internships')) || sizeof($this->session->userdata('internships')) < 1) {
    $this->session->set_userdata($internships_array);
} else {
    array_push($this->session->userdata('internships'), $internship_result['id']);
}

Answer 1

Instead of using array push in session get all the data in session to an array then update the array after that set session this will work

$internships_array['internships'][] = $internship_result['id'];
$insert_to_session=array();
if (!empty($this->session->userdata('internships')) || sizeof($this->session->userdata('internships')) >0) {
  $insert_to_session [‘internships’]= $this->session->userdata('internships');

}

array_push($insert_to_session [‘internships’], $internship_result['id']);

 $this->session->set_userdata($internships_array);