php and mysql fill empty values as empty <td>'s - php

Question

I'm trying to compare products and I'm already finished. I just have a problem that my product features are not under the right product names because I need to fill the gaps between with empty <td></td>.
Here is my code from the function that fills the values.
function datatable($id)
{
$conn = connection();
$productPost = $_POST["product"];
$sqlSpecTitle = "Select title as title from product where uid = '$id'";
$resultTitle = mysqli_query($conn, sqlSpecTitle) or die("database error:" . mysqli_error($conn));
foreach ($productPost as $product)
{
$sqlSpecValue = "Select productname, title, value from text join product on uid = uid join feature on uid = uid where productname = '$product" and uid = '$id';
$resultValue = mysqli_query($conn, $sqlSpecValue or die("database error:" . mysqli_error($conn));
if(mysqli_num_row($resultValue) > 0
{
while($row = mysqli_fetch_assoc($resultTitle))
{
echo "<td>" . $row['title'] . "<td>";
}
while ($row = mysqli_fetch_assoc($resultValue))
{
if($row['value'] == null)
{
echo "<td>" . "empty" . "<td>";
}
else
{
echo "<td> . $row['value'] . "</td>";
}
}
}
}
}
The productnames are getting filled in another function that is as much the same.
function headerTable()
{
$conn = connection();
$productPost = $_POST["product"];
foreach ($productPost as $product) {
$sqlSpecValue = "SELECT productname, title, value from text
join product on uid = uid
join feature on uid = uid
where productname = '$product';
$resultValue = mysqli_query($conn, $sqlSpecValue) or die("database error:" . mysqli_error($conn));
$row = mysqli_fetch_assoc($resultValue);
echo "<td id='product'>" . $row['productname'] . "</td>";
}
}

Answer 1

You make a "join" over between your tables, so you only get data if you have something in "text" table.
Just switch to "right join" and it should work.