edit form selected values input - codeigniter-3

Question

i have problem with selected dropdown,where i click form edit.dropdown can't selected empty(choose)if data no there in database.
i want if data empty,dropdown like this:
so here my code:
//mycontroller
public function edit($id) {
$data = array(
'title' => 'Users',
'breadcrumb'=> 'User Edit',
'groups' => $this->groups->get_all(),
'position' => $this->users->get_position(),
'report' => $this->users->get_leader(),
'users' => $this->users->get_by(array('nik' => $id)),
'content' => 'edit'
);
$this->load->view ('default', $data);
}
//my model
public function get_leader()
{
$idstat=array(4);
$this->db->select('nik');
$this->db->select('username');
$this->db->from('t_mtr_employee');
$this->db->where_in('t_mtr_employee.group_id',$idstat);
$query= $this->db->get();
return $query->result();
}
<div class="form-group">
<label class="control-label col-md-3">Reporting To<span
class="required"> * </span></label>
<div class="col-md-6">
<select class="form-control" name="reporting">
<option disabled>Choose</option>
<?php
$id = $users->nik;
foreach($report as $report) {
$selected = $id == $report->nik ? 'selected' : '';
echo '<option '.$selected.' value="'.$report->nik.'">'.$report->username.'</option>';
}
?>
</select>
</div>
</div>
code view above can't show where data dropdown selected,i want when i click form edit dropdown has selected.
where is my wrong code,how to resolve it?

Answer 1

Here is the process I used to figure this out... I've left in all the debug - testing/validation for proving the concept as an extra bonus to help show how to figure this stuff out...
I hope it's useful
<?php
/**
* Test code for Selection dependant upon database entries
*/
/**
* So we want to...
* 1. Build the Selections from the Databsae
* 2. Set the id to choose the selection
*
* #var object $users
*/
// Simulate the Data from the Database for creating the Selection Dropdown
$reports_to_object = [
(object) [ 'nik' => 1, 'username' => 'Fred' ],
(object) [ 'nik' => 2, 'username' => 'Sam' ],
(object) [ 'nik' => 3, 'username' => 'George' ]
];
$reports = (object) $reports_to_object;
// We expect when there is no entry from the Database
// our id will be set to 0.
$id = 3; // Change this for testing
// Results:
// 0 = Choose - Is correctly Selected
// 1 = Fred - Is correctly Selected
// 2 = Sam - Is correctly Selected
// 3 = George - Is correctly Selected
var_dump($reports); // make sure our mockup data is correct
?>
<form>
<div class="form-group">
<label class="control-label col-md-3">Reporting To<span
class="required"> * </span></label>
<div class="col-md-6">
<select class="form-control" name="reporting">
<?php
// DEBUG - Remove this as we are manually setting it.
// $id = $users->nik;
$selected = ( $id == 0 ) ? 'selected' : '';
echo '<option value="0" ' . $selected . '>Choose</option>';
foreach ( $reports as $report ) {
$selected = ( $id == $report->nik ) ? 'selected' : '';
echo '<option value="' . $report->nik . '" ' . $selected . '>' . $report->username . '</option>';
}
?>
</select>
</div>
</div>
</form>