How to hide empty data fields (php users only)

how do you suppress the display of a given field if it has no value in a database (see code below)? You can take a look of the printscreen also.
Thanks
<td align="center" valign="middle"><img src="<?php echo $row_DetailRS2['thumbnail1']; ?>" alt="" name="" border="1" /> 
 <?php echo $row_DetailRS2['code1']; ?></td>
 <td align="center" valign="middle"><img src="<?php echo $row_DetailRS2['thumbnail2']; ?>" alt="" name="" border="1" /> 
 <?php echo $row_DetailRS2['code2']; ?></td>
 <td align="center" valign="middle"><img src="<?php echo $row_DetailRS2['thumbnail3']; ?>" alt="" name="" border="1" /> 
 <?php echo $row_DetailRS2['code3']; ?></td>
 <td align="center" valign="middle"><img src="<?php echo $row_DetailRS2['thumbnail4']; ?>" alt="" name="" border="1" /> 
 <?php echo $row_DetailRS2['code4']; ?></td>
 <td align="center" valign="middle"><img src="<?php echo $row_DetailRS2['thumbnail5']; ?>" alt="" name="" border="1" /> 
 <?php echo $row_DetailRS2['code5']; ?></td>

// run the query; if it fails, print out the error message and terminate the script
$result = mysql_query($QrySQL) or die('Query failed: ' . mysql_error());
//if there isn't a row to fetch, then mysql_fetch_assoc() will return FALSE.
if ($row = mysql_fetch_assoc($result)) {
//$row now contains an associative array of the field names to their values in the first row
$firstSeen = $row['FirstSeen'];
You could loop through the result set by replacing that if with a while. If you wanted to find out how many rows were returned, you could use mysql_num_rows().

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How to hide empty data fields (php users only)

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