retaining a value in a controller variable

[eluser]bhogg[/eluser]
Could just use a session variable, in function A:

Code:

$this->load->library('session');
$this->session->set_userdata('my_id', $id);

Then in function B, C, D:

Code:

$this->load->library('session');
$this->session->userdata('my_id');

As a side note the id should probably be validated in function A otherwise a user could just change the URL and set whatever ID they would like.