Hide row if field is N/A or empty - php

Question

I have a question regarding hiding empty rows in my table.
I want to hide an entire row in the case a field says N/A which means the field is empty.
Example:
In the event that the field is empty or N/A, I want to hide the entire row. I will also welcome javascript solutions.
<tbody style="
white-space: nowrap;
">
<?php
foreach($student_subject_list AS $SSL)
{
$subject_name = $SSL["name"];
if(in_array($subject_name, array_keys($result)))
{
$total_score = 0;
$avg = count($result[$subject_name]);
$test_results = "";
$i = 1;
foreach($result[$subject_name] AS $SN)
{
if($i == 1)
{
$ie = "1<sup>st</sup>";
}
elseif($i == 2)
{
$ie = "<br>2<sup>nd</sup>";
}
elseif($i == 3)
{
$ie = "<br>3<sup>rd</sup>";
}
else
{
$ie = "<br>4<sup>th</sup>";
}
$test_results .= "$ie Test: $SN ";
$total_score += $SN;
$avg_score = $total_score/$avg;
$i++;
}
}
else
{
$total_score = $test_results = "N/A";
}
?>
<tr>
<td style="border: 1px solid black; font-size:11px;width:120px;white-space: nowrap;height:30px;"><?=$subject_name?></td>
<td style="border: 1px solid black; font-size:11px;width:120px;text-align:center;"><?=$test_results?></td>
<td style="border: 1px solid black; font-size:11px;width:120px;text-align:center;"><?=$avg_score?></td>
<td style="border: 1px solid black; font-size:11px;width:120px;text-align:center;"><?=$remark?></td>
</tr>
<?php
}
?>
</tbody>

Answer 1

Could you make the html where you create the row conditional on $test_results NOT being equal to "N/A"? Something like this:
<?php if(!$test_results === "N/A"){ ?>
<tr>
<td> etc etc
<td> etc etc
<td> etc etc
<td> etc etc
</tr>
<?php } ?>