Cookie will not delete in Workspaces?

I've watched the video several times. I've rewritten the code several times. I've even tried deleting the cookie manually but it still remains. What am I doing wrong? Any help greatly appreciated

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index.php

if (isset($_COOKIE)){

//var_dump($_COOKIE);

foreach ($_COOKIE as $key => $value) { if ($key != 'PHPSESSID') { echo '<div class = "form-group">';

echo '<a class="btn btn-info" href="inc/cookie.php?read=' . urlencode($key) . '">';
echo substr($key, 0, -10);
echo ' ';
echo date('d M Y H:i:s', (int) substr($key, -10));
echo '</a>';

echo '<a class="btn btn-danger" href="inc/cookie.php?delete=' . urlencode($key) . '">';
echo 'X</a>';

echo '</div>';

}

}

}

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cookie.php

session_start();

if (isset($_GET['save'])){ $name = urlencode($_SESSION['word'][2]) . time(); setcookie($name, implode(':', $_SESSION['word']), strtotime('+30days'), '/');

} elseif (isset($_GET['read'])) {

$_SESSION['word'] = array_combine(range(1,5), explode(':', $_COOKIE[$_GET['read']]));
header('location: /story.php');
exit;

} elseif (isset($_GET['delete'])) {

setcookie($_GET['delete'], "", time() - 3600, '/');

}

header('location: /index.php'); exit;

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