<html>
<body bgcolor="#fad888">
<form>
<textarea width="100%" growable autoactivate name="input"><?
$input = $_REQUEST[input];
$allowed = $_REQUEST[allowed];
if ( !isset($input) )
{ echo "<html>
<body>
<h1>This is a test</h1>
<font color=\"red\">This is red</font>
<center>
<img src=\"\" height=\"100\" width=\"100\" alt=\"My picture\">
</center>
</body>
</html>"; }
else
{
$input = strip_tags($input, "$allowed");
$input = stripslashes($input);
echo "$input"; }
?>
</textarea><br>
<center>
Allowed tags: <input type="text" name="allowed" <?
if ( !isset($input) )
{ echo " value=\"<html>, <body>\"";
}
else { echo "value=\"$allowed\""; }
?>/> <input type="submit">
</center>
</form>
</body>
</html>