getting the id from a table in database - sql

Question

i have 3 tables city, information and state. In my code i've shown the different cites under different state. what i want to do is to get the seperate ids of the cities so that i can run some queries in my 'information' table.
My model is given below:
function get_status(){
$states = $this->db->get('state');
$like = array();
$status = array();
foreach ($states->result() as $state){
$cities = $this->db->get_where('city', array('state_id'=> $state->id));
$like=$cities->result();
$status=$like[0]->city_id;
}
echo $status;
}
but when i run the code i only get the last id of the last city stored under the last state in the the table. for example the state 3 has city that has id 3. i'm only getting this id. but i want all the ids of the cities like- 1,2,3.
i'm using Codeigniter framework.
Thanks in advance

Answer 1

$like - it`s an array.
[0] - the first element of an array.
echo $like[0]->city_id;
I haven`t tested it. (In one iteration -> it takes all the cities from that ID)
function get_status(){
$states = $this->db->get('state');
$like = array();
$status = array();
foreach ($states->result() as $state){
$cities = $this->db->get_where('city', array('state_id'=> $state->id));
foreach ($cities->result() as &$v){
echo $v->city_id."<br/>";
}
echo "......<br/>";
}
}