PHP Create Month & Year Drop Down List With Current Month & Year

PHP code below will create a 2 drop down lists, 1 for month and 1 for year. They have pre-selected option with current month & current year.

Month drop down list options run from 1 to 12
Year drop down list options run from current year to current year + 10
By default, pre-selected option will be current month & year. And pre-selected option will be changed when select another option.
The form has POST method and submit to SELF

<?php
	$month = $_POST["ddlMonth"];
	$year = $_POST["ddlYear"];
 
	if($month == "")
		$month = date("m");
	if($year == "")
		$year = date("Y");
 
?>
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Create Month & Year Drop Down List With Current Month & Year</title>
<meta name="robots" content="noindex, nofollow" />
</head>
 
<body>
	<form action="" method="post">
	Month: 
	<select id="ddlMonth" name="ddlMonth">
	<?php
 
		for($i=1; $i<=12; $i++)
		{
			if($i == $month)
				echo '<option selected value="' . $i . '">' . $i . '</option>';
			else
				echo '<option value="' . $i . '">' . $i . '</option>';
		}
	?>		
	</select>
	<br> <br>
	Year: 
	<select id="ddlYear" name="ddlYear">
	<?php
		for($i=$year; $i<=$year+10; $i++)
		{
			if($i == $year)
				echo '<option selected value="' . $i . '">' . $i . '</option>';
			else
				echo '<option value="' . $i . '">' . $i . '</option>';
		}
	?>			
	</select>
	<br> <br>
	<button type="submit">Go</button>
	</form>
</body>
</html>