Saving the Value in Selects After Submission in PHP

Let's make sure the user's selection is saved after submission:

<form action="" method="GET">
	<select name="test">
		<option value="1" <?php
			if (!empty($_GET['test']) and $_GET['test'] === '1') {
				echo 'selected';
			}
		?>>item1</option>
		<option value="2" <?php
			if (!empty($_GET['test']) and $_GET['test'] === '2') {
				echo 'selected';
			}
		?>>item2</option>
		<option value="3" <?php
			if (!empty($_GET['test']) and $_GET['test'] === '3') {
				echo 'selected';
			}
		?>>item3</option>
	</select>
	<input type="submit">
</form>

Modify the previous task so that the selected value does not disappear after submission.