Retrieve only column with value larger than 0 - php

Question

I want to create a display that only show the column with value larger than 0.
My code to display the field and value :
echo "<table><tr>";
while ($property = mysql_fetch_field($result))
{
if($property->name > '0')
echo "<td>Field name: " . $property->name . "</td>";
}
echo "<tr/>";
while ($row = mysql_fetch_assoc($result))
{
echo "<tr><td>".$row['a']."</td>";
echo "<td>".$row['b']."</td>";
echo "<td>".$row['c']."</td>";
echo "<td>".$row['d']."</td></tr>";
}
echo "</table>";
The output is like this :
Field name: a Field name: b Field name: c Field name: d
1 2 3 0
I want to have a display like below :
Field name: a Field name: b Field name: c
1 2 3
Where the field name: d is not display because the value is 0.
How can I do that? Can I wish for some examples from you?
Thanks.

Answer 1

Your code modified as for proper expected result.
echo "<table><tr>";
while ($property = mysql_fetch_field($result))
{
if($property->name > '0')
echo "<td>Field name: " . $property->name . "</td>";
}
echo "<tr/>";
while ($row = mysql_fetch_assoc($result))
{
echo "<tr>";
if($row['a'] > 0) echo "<td>".$row['a']."</td>";
if($row['b'] > 0) echo "<td>".$row['b']."</td>";
if($row['c'] > 0) echo "<td>".$row['c']."</td>";
if($row['d'] > 0) echo "<td>".$row['d']."</td>";
echo "</tr>";
}
echo "</table>";

Answer 2

try
while ($row = mysql_fetch_assoc($result))
{
echo "<tr>";
if($row['a'] >0) echo "<td>".$row['a']."</td>"; else echo"<td>-<td>";
if($row['b'] >0) echo "<td>".$row['b']."</td>"; else echo"<td>-<td>";
if($row['c'] >0) echo "<td>".$row['c']."</td>"; else echo"<td>-<td>";
if($row['d'] >0) echo "<td>".$row['d']."</td>"; else echo"<td>-<td>";
echo "</tr>";
}

Answer 3

$results = array();
$disp_col_a = false;
$disp_col_b = false;
$disp_col_c = false;
$disp_col_d = false;
while ($row = mysql_fetch_assoc($result))
{
if ($row['a'] > 0){
$disp_col_a = true;
}
if ($row['b'] > 0){
$disp_col_b = true;
}
if ($row['c'] > 0){
$disp_col_b = true;
}
if ($row['b'] > 0){
$disp_col_b = true;
}
$results[] = $row;
}
echo "<table><tr>";
if ($disp_col_a){
echo "<td>Field name: a</td>";
}
if ($disp_col_b){
echo "<td>Field name: b</td>";
}
if ($disp_col_c){
echo "<td>Field name: c</td>";
}
if ($disp_col_d){
echo "<td>Field name: d</td>";
}
echo "<tr/>";
foreach ($results as $results_row) {
{
echo "<tr>";
if ($disp_col_a){
echo "<td>";
if ($results_row['a'] > 0){
echo $results_row['a'];
}
echo "</td>";
}
if ($disp_col_b){
echo "<td>";
if ($results_row['b'] > 0){
echo $results_row['b'];
}
echo "</td>";
}
if ($disp_col_c){
echo "<td>";
if ($results_row['c'] > 0){
echo $results_row['c'];
}
echo "</td>";
}
if ($disp_col_d){
echo "<td>";
if ($results_row['d'] > 0){
echo $results_row['d'];
}
echo "</td>";
}
echo "</tr>";
}
echo "</table>";

Answer 4

Not to be picky, putting aside that at first glance it certainly makes more sense to let mysql do the heavy lifting here - why would you want to output some number of rows in an HTML table that have different numbers of columns? Aside from the permanent maintenance headache, this would, by some, be considered Bad Design from a visual aesthetics perspective. :)
At the same time, I do understand the concept of "Good Enough Is," so I won't complain too much.