เป็นไปได้ไหมที่จะแทรก if statement เข้าไปใน echo ครับ (PHP)

if($row['$data1']==""){
$a = echo "-";
}

if($row['$data2']==""){
$b =echo "-";
}

echo"<TR>
<td>$a</td>
<td>$b</td>
</TR>";

echo "<TR>";
echo "<td>";
if($row['$data1'] == ""){ echo "-"; }
echo "</td>";
echo "<td>";
if($row['$data2'] == ""){ echo "-"; }
echo "</td>";
echo "</TR>";

<TR>
    <td>
<?php 
if($row['$data1'] == ""){ echo "-"; }
?>
    </td>
    <td>
<?php
if($row['$data2'] == ""){ echo "-"; }
?>
    </td>
</TR>

<tr>
     <td><?php echo empty($row['$data1']) ? '-' : $row['$data2']; ?></td>
     <td><?php echo empty($row['$data2']) ? '-' : $row['$data2']; ?></td>
</tr>

echo"<TR>
<td>if($row['$data1'] == ""){ echo "-";}</td>
<td>if($row['$data2'] == ""){ echo "-";}</td>
</TR>"

echo "<TR><td>".($row['$data1'] == ""?"-":$row['$data1']). "</td>";
echo "<td>".($row['$data2'] == ""?"-":$row['$data2'])."</td></TR>";

$a = $i==""?1:$i;   ///  ใส่ค่าในตัวแปร   ถ้า $i มีค่าว่าง ใส่ค่า 1 ให้ $a  ถ้า $i ไม่ว่าง $a มีค่าเท่ากับ $i

// echo ออกมา
echo ($i==""?1:$i);