php - borderColor if null value -

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while($row = mysql_fetch_array($query2testing)) {   echo "<tr>";   echo "<td><center>$i</td>";   echo "<td>" . $row['name'] . "</td>";   echo "<td>" . $row['matricno'] . "</td>";   echo "<td><center>" . $row['lc'] . "</td>";   echo "<td>" . $row['code'] . "</td>";   echo "<td>" . $row['subject'] . "</td>";   if(!empty($row['assignment1'])) {     echo "<td><center><font color='red'>" . $row['assignment1'] . "</td>";    }   echo "<td><center>" . $row['quiz'] . "</td>";   echo "<td><center>" . $row['participation'] . "</td>";   echo "<td><center>" . $row['attendance'] . "</td>";   echo "<td><center>" . $row['exam'] . "</td>";    echo "</tr>";   $i++; } echo "</table>";

this simple code. how make column red if assigment1 null , assigment1 not null blue

style="background-color:red;" , background-color:blue; possibly looking for. did not specify how columns should painted might have adjust this.

just insert columns or rows want apply color:

e.g. row (guess header):

echo "<td style="background-color:red;"><center><font color='blue'>" . $row['assignment1'] . "</td>";

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