Вы допустили ошибку, начиная с <td>'.<a href="r
, это должно быть
<td><a href="records.php?reqnumber='.$row_message['reqnumber'] .'">
Вот исправленный формат
<?php
while($row = mysqli_fetch_array($result))
{
$output .= '
<tr>
<td>'.$row["reqname"].'</td>
<td>'.$row["month"]."/".$row["day"]."/".$row["year"].'</td>
<td>'.$row["empname"].'</td>
<td>'.$row["position"].'</td>
<td>'.$row["account"].'</td>
<td>'.$row["platform"].'</td>
<td>'.$row["processor"].'</td>
<td>'.$row["ram"].'</td>
<td>'.$row["monitor"].'</td>
<td>'.$row["phone"].'</td>
<td>'.$row["phonetype"].'</td>
<td>'.$row["headset"].'</td>
<td>'.$row["status"].'</td>
<td><a href="records.php?reqnumber='.$row_message['reqnumber'] .'"><i class="fa fa-edit" style="color: black; font-size: 25px;"></i></a></td>
</tr>
';
}
echo $output;