Yii2 Dropdown widget with dynamic items - yii2

Question

I want a dropdown widget in yii2 with dynamic items. How is it possible?
After doing this i face a error that option is required.
What's wrong in my code?
$items = [];
foreach ($all_label as $each_label) {
$items[$each_label->id_label]['id_label'] = $each_label->id_label;
$items[$each_label->id_label]['label'] = $each_label->label_name;
}
print_r($items);
O:P-
Array
(
[5] => Array
(
[id_label] => 5
[label] => Label1
)
[6] => Array
(
[id_label] => 6
[label] => Label2
)
[9] => Array
(
[id_label] => 9
[label] => Label3
)
)
echo Dropdown::widget([
'items' => [
$items
],
]);

Answer 1

Ok, after checking the spec, it seems the problem is that you use "id_label" which is not a valid option for the widget.
You need to leave this out:
$items = [];
foreach ($all_label as $each_label) {
$items[$each_label->id_label]['label'] = $each_label->label_name;
}
If this does not generate the values as you need them, try to adapt to this:
$items = [];
foreach ($all_label as $each_label) {
$items[$each_label->id_label]['label'] = $each_label->label_name;
$items[$each_label->id_label]['options']['value'] = $each_label->id_label_;
}
http://www.yiiframework.com/doc-2.0/yii-bootstrap-dropdown.html#$items-detail