PHP를 사용하여 날짜 선택 상자 만들기

<form action="" method="post" >
<?php
$months = array (1 => &#39;January&#39;, &#39;February&#39;, &#39;March&#39;, &#39;April&#39;, &#39;May&#39;, &#39;June&#39;, &#39;July&#39;, &#39;August&#39;, &#39;September&#39;, &#39;October&#39;, &#39;November&#39;, &#39;December&#39;);
$days = range(1,31);
$years = range(2008,2018);
echo &#39;<select name="month" >&#39;;
foreach ($months as $key => $value) {
echo "<option value=\"$key\">$value</option>";
}
echo &#39;</select>&#39;;
echo &#39;<select name="day" >&#39;;
foreach ($days as $value) {
echo "<option value=\"$value\">$value</option>";
}
echo &#39;</select>&#39;;
echo &#39;<select name="year" >&#39;;
foreach ($years as $value) {
echo "<option value=\"$value\">$value</option>";
}
echo &#39;</select>&#39;;
?>
</form>