I am working with ajax and Codeigniter, I send a request by ajax to the controller and get a response like the below code:-
Controller Response:-
array(1) {
  [0]=>
  object(stdClass)#29 (1) {
    ["absent"]=>
    string(1) "4"
  }
}
the question is here that how can I get 4 from the response?
ajax call:-
 $('#staff').change(function(){
    let staff_id  = $(this).val();
    let month = $('#month').val();
    $.ajax({
        url:base_url+'hr/home/getStaffAbsentDay',
        type:'POST',
        data:{
            'staff_id':staff_id,
            'month':month
        },
        success:function(response){
            console.log(response);
            
        }
    })
});
Controller:-
public function getStaffAbsentDay(){
    $id =$this->input->post('staff_id');
    $month=$this->input->post('month');
    $this->stuff_model->get_staff_absent_days($id,$month);
}
Model:-
public function get_staff_absent_days($id,$month){
  $year =jDateTime::date('Y',false,false,true,'Asia/Kabul');
  $this->db->select('absent'); 
  $this->db->from('staff_attendance');   
  $this->db->where('staf_id', $id);
  $this->db->where('year', $year);
  $this->db->where('month', $month);
  $d=$this->db->get()->result();
  return json_encode($d);
}
 
     
    