Untitled

<!DOCTYPE html>
<html lang="es">
<head>
  <meta charset="utf-8">
  <title>RESULT</title>
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
</head>

<body>
<?php
 function get($var, $m = "")
 {
   if (!isset($_REQUEST[$var])) {
     $tmp = (is_array($m)) ? [] : "";
   } elseif (!is_array($_REQUEST[$var])) {
     $tmp = trim(htmlspecialchars($_REQUEST[$var], ENT_QUOTES, "UTF-8"));
   } else {
     $tmp = $_REQUEST[$var];
       array_walk_recursive($tmp, function (&$valor) {
       $valor = trim(htmlspecialchars($valor, ENT_QUOTES, "UTF-8"));
     });
   }
   return $tmp;
 }

$side  = get("side");
$corner = get("corner");
$sideOK   = false;
$cornerOK  = false;

  if ($side == "") {
    print "  <p class=\"warning\">You must add the parameter (x,y).</p>\n";
    print "\n";
  }  else {
    $sideOK = true;
  }
  if ($corner == "") {
    print "  <p class=\"warning\">You must add the parameter (rx, ry).</p>\n";
    print "\n";
  }  else {
    $cornerOK = true;
  }

  if ($sideOK && $cornerOK){
    print " <svg version=\"1.1\" xmlns=\"http:/www.w3.org/2000/svg\"\n"
    . " width=\"" .($side+10) ."px\" height=\"" . ($side + 10) . "px\">\n";
    print " <rect fill=\"white\" stroke=\"black\" stroke-width=\"10\" "
    . "x=\"5\" y=\"5\" width=\"$side\" height=\"$side\" rx=\"$corner\" ry=\"$corner\" />\n";
    print " </svg>\n";
    print "\n";
  }
  ?>
  <p><a href="form.php">Go back.</a></p>
</body>
</html>