RadioButton Woes

<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="utf-8">
    <title>9 Block Plotter</title>
    <meta name="description" content="Hello World">
    <!-- Latest compiled and minified CSS -->
    <link rel="stylesheet" href="./css/bootstrap.min.css">
    <!-- Optional theme -->
    <link rel="stylesheet" href="./css/bootstrap-theme.min.css">
<style>
.form-group{
padding: 10px;
}
body {
    padding-top: 65px;
}
</style>
</head>

<body>
<?php if ($_SERVER['REQUEST_METHOD'] == 'GET') { ?>

<div class="container">
            <form action="<?php echo htmlentities($_SERVER['SCRIPT_NAME']) ?>" method="post">
                <div class="form-group  has-success has-feedback">
                    <p class="help-block">Create a 9 block Diagram, copy from spreadsheet</p>
                    <div class="col-md-12">
                        <textarea  rows="18" class="form-control" id="Desc" name="Desc" placeholder="Bill Kumagai 3 3" value=""></textarea>
                          <!-- Radio Buttons  -->
                        <label class="radio-inline"><input type="radio" id="optradio1" name="optradio1">Font size 8</label>
                         <label class="radio-inline"><input type="radio" id="optradio2" name="optradio2" checked>Font size 10</label>
                         <label class="radio-inline"><input type="radio" id="optradio3" name="optradio3">Font size 12</label>
                         <label class="radio-inline"><input type="radio" id="optradio4" name="optradio4">Font size 14</label>

                    </div>
              </div>

<input id="submit" name="submit" type="submit" value="Send" class="btn btn-primary">
</form>
 </div>
 <div class="container">


 </div>


    <!-- Latest compiled and minified JavaScript -->

 <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.2/jquery.min.js"></script>
 <script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.4/js/bootstrap.min.js"></script>
</body>
</html>


<?php } else {
echo "<!DOCTYPE html>";
echo "<html><body>";

  echo "<div>";
  $em=$_POST['Desc'];
  // None of these are found
  $ex=$_POST['optradio1'];  echo "<br/> 1: ".$ex;
  $ex=$_POST['optradio2'];  echo "<br/> 2: ".$ex;
  $ex=$_POST['optradio3'];  echo "<br/> 3: ".$ex;
  $ex=$_POST['optradio4'];  echo "<br/> 4: ".$ex;
   echo "<center>";
  echo "<H3>9 Block Associate Plotter</H3>";
   echo "</center>";
  echo "</div>";

//Send a generated image to the browser
//create_image();
 echo "<div><p><br/>";
 echo "<center>";
 echo "<img height=\"650\" alt=\"Dynamically generated image\" src=\"img.php?app=".$em. "\" width=\"1000\">";
 echo "</center>";
 echo "</p></div><br/>";
 echo "<div class=\"container\">";
 echo "<a href=\"imf.php\" class=\"btn btn-primary btn-md\" role=\"button\">Do It Again</a>";
 echo "</div><br/>";
 echo "</body></html>";