for($i=0; $i<3; $i++) {                         
  if(($row[$i+11] != "") || ($row[$i+19] != "")) {
    print("<tr><td>");
    if($row[$i+11] != "") {
      $tmp = $i + 11;
      print("<table width=100%><tr><td>$row[$tmp]</td>");
      $tmp = $i + 15;
      print("<td align=right>($row[$i+11])</td></tr></table>\n");

---

In the sample above, the reference to $row[$tmp] works fine but the more direct $row[$i+11] doesn't and returns a parsing error saying:

Parse error: parse error, expecting `']'' in /home/httpd/html/xxx.html on line 47

As you can see, I have devised a work-around to the problem but I cannot easily see that I have made a mistake in it.