Probably a million ways to do this, but here's what I would do
$months = array("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
echo "<select name=\"month\">";
for($i=0;$i<count($months);$i++) {
echo "<option value=".$months[$i]." ";
if($months[$i] == date("M")) {
echo "selected";
}
echo ">".$months[$i]."</option>";
}
echo "</select>
<br>
<select name=\"day\">";
for($i=1;$i<32;$i++) {
echo "<option value=".$i." ";
if($i == date("d")) {
echo "selected";
}
echo ">".$i."</option>";
}
echo "</select>
<br>
<select name=\"year\">";
for($i=2000;$i<(date("Y")+5);$i++) {
echo "<option value=".$i." ";
if($i == date("Y")) {
echo "selected";
}
echo ">".$i."</option>";
}
echo "</select>";