如果查询结果为NULL，如何显示值

Excuse me, I have source for get value from table

foreach ($hard->result() as $row) {
    $ha[] = $row->bek;
  }

(bek is name of column and $hard isi name of variable return query)

then I wanna write the result with lopping too.

<?php
  '<tr>';
    $d = 0;
    $g = 0;
    $s = 0;
    foreach ($mon->result() as $row) {
  ?>
    <td class="tg-yw4l"><?php echo $row->sNama;?></td>
    <td class="tg-yw4l"><?php echo $norm[$d++];?></td>
    <td class="tg-yw4l"><?php echo $ha[$g++];?></td>
    <td class="tg-yw4l"><?php echo $urg[$s++];?></td>
    <td class="tg-yw4l"></td>
    </tr>
  <?php
    }
  ?>

my question is : how to give '0', when the result from db doesn't give a value (null) Can someone help me please,,

Thanks before

You can try this

<?php
  '<tr>';
    $d = 0;
    $g = 0;
    $s = 0;
    foreach ($mon->result() as $row) {
  ?>
    <td class="tg-yw4l"><?php isset($row->sNama) ? echo $row->sNama : echo '0'; ?></td>
    <td class="tg-yw4l"><?php isset($norm[$d++]) ? echo $norm[$d++] : echo '0'; ?></td>
    <td class="tg-yw4l"><?php isset($ha[$g++]) ? echo $ha[$g++] : echo '0'; ?></td>
    <td class="tg-yw4l"><?php isset($urg[$s++]) ? echo $urg[$s++]] : echo '0'; ?></td>
    <td class="tg-yw4l"></td>
    </tr>
  <?php
    } 

?>

<?php
    $res = $mon->result();
    if($res && count($res)>0){
        $d = 0;
        $g = 0;
        $s = 0;
        foreach ($res as $row) { ?>
            <tr>
                <td class="tg-yw4l"><?php echo $row->sNama;?></td>
                <td class="tg-yw4l"><?php echo $norm[$d++];?></td>
                <td class="tg-yw4l"><?php echo $ha[$g++];?></td>
                <td class="tg-yw4l"><?php echo $urg[$s++];?></td>
                <td class="tg-yw4l"></td>
            </tr>
        <?php } 
    } 
?>

thanks for all your attention to answer my case,

my problem is how to manipulate value from the table even when the value is empty

after I tried all way, I knew my case can't be fixed if I don't change my query because when I tried to loop with index 0, the result isnot still give '0'

foreach ($hard->result() as $row) {
    $ha[0] = $row->bek;
  }

<td class="tg-yw4l"><?php echo $ha[0];?></td>

because of that I knew, I should change my query in order if the result is empty it must give value '0'