php loop

selectOption.php

<?php

$options = array(
    1 => 'Opt1',
    2 => 'Opt2',
    3 => 'Opt3',
);

?>

<select name="up_opt">
<?php foreach ($options as $value => $label): ?>
    <option value="<?php echo $value; ?>" <?php if ($_GET['up_opt'] == 1) { echo ' selected="selected"'; } ?>><?php echo $label; ?></option>
<?php endforeach ?>
</select>