Ajouter une balise html dans du script PHP

function sheetData($sheet) {
  $re = '<table>';     // starts html table

  $x = 1;
  while($x <= $sheet['numRows']) {
    $re .= "<tr>\n";
    $y = 1;
    while($y <= $sheet['numCols']) {
      $cell = isset($sheet['cells'][$x][$y]) ? $sheet['cells'][$x][$y] : '';
	  $re .= " <td>$cell</td>\n";  
      $y++;
	   if ($sheet['cells'][$x][$y] = "Images") {
		  echo "<img src='".$sheet['cells'][$x][$y]."' />";
	  }
    }  
    $re .= "</tr>\n";
    $x++;
  }
  
  return $re .'</table>';     // ends and returns the html table
}