painelProd.php

<?php
require("topSite.html");
?>

<center><div class="dropdown">
  <button class="btn btn-secondary dropdown-toggle" type="button" id="dropdownMenu2" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
    Ações Produtos
  </button>
  <div class="dropdown-menu" aria-labelledby="dropdownMenu2">
    <a href="cadProduto.php"><button class="dropdown-item" type="button">Cadastrar Produto</button></a>
    <a href="editProd.php"><button class="dropdown-item" type="button">Editar Produto</button>
    <a href="delProduto.php"> <button class="dropdown-item" type="button">Deletar Produto</button>
  </div>
</div></center>
<script src="https://code.jquery.com/jquery-3.4.1.slim.min.js" integrity="sha384-J6qa4849blE2+poT4WnyKhv5vZF5SrPo0iEjwBvKU7imGFAV0wwj1yYfoRSJoZ+n" crossorigin="anonymous"></script>
<script src="https://cdn.jsdelivr.net/npm/popper.js@1.16.0/dist/umd/popper.min.js" integrity="sha384-Q6E9RHvbIyZFJoft+2mJbHaEWldlvI9IOYy5n3zV9zzTtmI3UksdQRVvoxMfooAo" crossorigin="anonymous"></script>
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.4.1/js/bootstrap.min.js" integrity="sha384-wfSDF2E50Y2D1uUdj0O3uMBJnjuUD4Ih7YwaYd1iqfktj0Uod8GCExl3Og8ifwB6" crossorigin="anonymous"></script>

</body>
</html>