迭代结果时，php echo不显示

I have a codeigniter view where "echo" statement is not displaying the output - this happens only from a specific loop that I am giving below. I have tried to run it through a sample for loop with echo statement inside; it works without issues. In the code block below $results is an array returned from the controller. I have tried writing the values of the array to a file and they get written correctly.

foreach ($results as $row) {
  fwrite($myfile,$row[0] . PHP_EOL); //this writes perfectly fine
  echo "<tr><td>TEst . $row[0] </td>";  //this doesnt show up
 }

i have tried other threads in this forum with subject "echo not working" - they do not match my peculiar case. Any help is appreciated

WAS:

echo "<tr><td>TEst . $row[0] </td>";

IS:

echo "<tr><td>TEst ".$row[0]."</td>";

If that doesn't work, you need to find out what your array really has in it, because it means there is no 0 key. Try,

print_r($row);

Try this...

   foreach ($results as $row) {
     fwrite($myfile,$row[0] . PHP_EOL);
     echo '<tr><td>TEst'.$row[0].'</td></tr>';
 }

try

if($results){
foreach ($results as $row) {
  fwrite($myfile,$row[0] . PHP_EOL);

//try this
 echo "<tr><td>TEst ".$row[0]."</td></tr>";

//or this
echo "<tr><td>TEst ".$row->keyname."</td></tr>";

//or this
echo "<tr><td>TEst ".$row['keyname']."</td></tr>";   
 }
}
else
{
echo "NO RESULTS";
}