URL的Cookie值

Question

This is my code for one "Satisfaction Quiz" that I run on a CRM for my users, but the cookie isn't working as I expcted. The cookie must be set by the URL, because my user's can respond more than one quiz, the only thing that change's is the parameter "numerodocaso" that i get from the URL.

MAIN PAGE:

<?php 

//setcookie("avaliacao", "", time() - 3600);

if(isset($_COOKIE['avaliacao'])) {

    echo '<div class="titulo">Cookie já utilizado*</div>';

} else {

?>
    <div class="titulo">Pesquisa de Satisfação*</div>

    <div class="wrapper">
        <div class="">(Péssimo)</div>

        <div class="">
            <div class="toggle-btn-grp">
                <label onclick="" class="toggle-btn seleciona"><input type="radio" name="group2" data-valor="1" value="1"/>1</label>
                <label onclick="" class="toggle-btn seleciona"><input type="radio" name="group2" data-valor="2" value="2"/>2</label>
                <label onclick="" class="toggle-btn seleciona"><input type="radio" name="group2" data-valor="3"/>3</label>
                <label onclick="" class="toggle-btn seleciona"><input type="radio" name="group2" data-valor="4" />4</label>
                <label onclick="" class="toggle-btn seleciona"><input type="radio" name="group2" data-valor="5"/>5</label>
            </div>
        </div>
        <div class="">(Excelente)</div>
    </div>

    <div id="campos"></div>

    <script>


    $(".toggle-btn:not('.noscript') input[type=radio]").addClass("visuallyhidden");

    $(".toggle-btn:not('.noscript') input[type=radio]").change(function() {
        if( $(this).attr("name") ) {

            $(this).parent().addClass("success").siblings().removeClass("success")

            var valor = $(this).attr("data-valor");
            show_fieldtext(valor);

        } else {

            $(this).parent().toggleClass("success");

        }
    });


    function show_fieldtext(selecao) {

        $("#campos").html('');

        var valores = '<form method="post" action="processamento.php"><input type="hidden" name="nota" value="'+selecao+'">';

        valores += '<p>Quer nos contar como foi sua experiencia?</p>';
        valores += '<div><textarea name="experiencia"></textarea></div>';

        valores += '<input type="hidden" name="inv" value="<?=$_GET['inv']?>">'
        valores += '<input type="hidden" name="atendente" value="<?=$_GET['atendente']?>">'
        valores += '<input type="hidden" name="numerodocaso" value="<?=$_GET['numerodocaso']?>">'

        valores += '<div><button type="submit">ENVIAR</button></div>';

        $("#campos").append(valores)
    }

    $(document).ready(function() {

    });
    </script>

    <?php } ?>


JS:



 <?php 

$username = '';
$password = '';
$conn = new PDO('mysql:host=localhost;dbname=', $username, $password);
$conn->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);

try {


    extract($_POST);

    $stmt = $conn->prepare('INSERT INTO cadastro (nota,experiencia,atendente,caso,data_inclusao) VALUES(:nota,:experiencia,:atendente,:caso,:data_inclusao)');
    $stmt->execute(array(
        ':nota' => $nota,
        ':experiencia' => trim(filter_var($experiencia, FILTER_SANITIZE_STRING)),
        ':atendente' => $atendente,
        ':caso' => $numerodocaso,
        ':data_inclusao' => date('Y-m-d H:i:s')
    ));

    if( $stmt->rowCount() > 0 )
    {
        $cookie_name = "avaliacao";
        $cookie_value = json_encode(array('caso'=>$numerodocaso,'nota'=>$nota,'atendente'=>$atendente));
        setcookie($cookie_name, $cookie_value, time() + (86400 * 365), "/"); // 86400 = 1 day

        header('location: http://localhost/satisfacao-crm/index.php?inv='.$inv.'&atendente='.$atendente.'&numerodocaso='.$numerodocaso);
        exit;
    }

} catch(PDOException $e) {

    echo 'ERROR: ' . $e->getMessage();

}
?>