filter_input textarea not working

I am new using filter_input. At least it works fine with normal form fields however when I try with a text area then it returns false.

Textarea:

<textarea cols="50" rows="10" name="message" id="message"></textarea>

Below here you see the code I use.

filter_input_array(INPUT_POST, "message", FILTER_DEFAULT);

This returns:

filter_input or filter_input_array = bool(false);
$_POST["message"] = "message";

However if I just use $_POST["message"] it works fine. But here I get a warning from netbeans. So I'de like to use another way to get it.

Try this...

<?php
if(isset($_POST['message'])){
    $message = filter_input(INPUT_POST, "message", FILTER_DEFAULT);
    echo $message;
}
?>
<form action="" method="POST">
  <textarea cols="50" rows="10" name="message" id="message"></textarea>
  <input type="submit" value="submit">
</form>

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