How come this include works on it's own, but not as an include?

programming
1

So, I’m trying to create a drop-down, dynamic select box.
Essentially, MySQL iterates through the rows, printing ‘vname’ from each line.

This works as a standalone code:



<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Untitled Document</title>
</head>

<body>
<select>
    <?php
$conn = mysql_connect ("xxxx", "xxxx", "xxxx");
mysql_select_db ("database", $conn);

$query = "SELECT * FROM venues"; 
                $result = mysql_query($query) or die(mysql_error());
                $num=mysql_numrows($result);     
                $i=0;
                while ($i < $num) {
                    echo"<option value=".mysql_result($result,$i,'vname').">".mysql_result($result,$i,'vname')."</option></br>";
                    $i++;
                }
?>
</select>
</body>
</html>

…which is cool.
This seems to break the page though:


<form id="new_session" action="prcs_create_session.php" method="post">
      <table>
         <tr>
             <td>
            Location
            </td>
            <td>
            
                <select name="location" id="location">
           
                       <?php
                        /*
                        $query = "SELECT * FROM venues"; 
                        $result = mysql_query($query) or die(mysql_error());
                        $num=mysql_numrows($result);     
                        $i=0;
                        while ($i < $num) {
                            echo"<option value=".mysql_result($result,$i,'vname').">".mysql_result($result,$i,'vname')."</option></br>";
                            $i++;
                            }
                    
                        */
                        include(qtestinc.php);
                    ?>
                </select>
    
            </td>
          </tr>
     </table>
     <input type="submit" value="Create session" />
     <input type="reset" value="Start again" />
  </form>

…which won’t let the select list print anything. What is happening?