Reformatting poorly inputted data and displaying it properly. (In this case, minute and hour fields were stored separately)

time_picker_fix.php

<?
//assign variables
$start_hour_field = get_field_object('start_hour');
$starthour = $start_hour_field['value'];
$start_min_field = get_field_object('start_min');
$startmin = $start_min_field['value'];
						
$end_hour_field = get_field_object('end_hour');
$endhour = $end_hour_field['value'];
$end_min_field = get_field_object('end_min');
$endmin = $end_min_field['value'];
?>
<td>
<?
//display as 08:15 A.M.
if ($starthour>=12)
          {
          echo $starthour - 12;
          }
      else {
          echo $starthour;
          }
          ?>
    :
    <?php echo $startmin; ?>
    <?if ($starthour>=12)
          {
          echo " P.M.";
          }
      else {
          echo " A.M.";
          }
          ?>
</td>