Yii2 Dropdown list without value attribute inside option element

I’m creating a year dropdown list using the following code:


<?php

$range = range(2016, 2026);

echo $form->field($model, 'year')->dropDownList($range)->label("Year");

?>

It outputs:


<select id="testform-year" class="form-control" name="TestForm[year]">

    <option value="0">2016</option>

    <option value="1">2017</option>

    <option value="2">2018</option>

    <option value="3">2019</option>

    <option value="4">2020</option>

    <option value="5">2021</option>

</select>

But I want the output without value attribute inside option, like:


<select id="testform-year" class="form-control" name="TestForm[year]">

    <option>2016</option>

    <option>2017</option>

    <option>2018</option>

    <option>2019</option>

    <option>2020</option>

    <option>2021</option>

</select>

I hope that helps

<?php

   &#036;range = range(2016, 2026);


   &#036;a = array_combine(&#036;range, &#036;range); 


  echo &#036;form-&gt;field(&#036;model, 'year')-&gt;dropDownList(&#036;a,['prompt'=&gt;'select']  )-&gt;label(&quot;Year&quot;);


?&gt;