<input type="text" class="senha">
    <table class="table table-striped">
        <thead>

                <tr>
                    <th>#</th>
                    <th>Mês/Ano</th>
                    <th>Senha</th>
                    <th>Máquina</th>
                    <th>Validade</th>
                </tr>

        </thead>
        <tbody>
            <?php
            $i = 0;

            while ($linha = $consulta->fetch(PDO::FETCH_ASSOC)) {
                $i += 1;
                ?>
                <tr>
                    <td><?php echo $i; ?></td>
                    <td><?php echo mes_extenso($linha['mes']) .'/' .$linha['ano']; ?></td>
                    <td><?php echo $linha['senha_mensal']; ?></td>
                    <td><?php echo $linha['nome_maquina']; ?></td>
                    <td><?php echo date('d/m/Y', strtotime($linha['validade'])); ?></td>
                    <td class="text-center"><a class='btn btn-info btn-xs'><span class="glyphicon glyphicon-edit"></span> Copiar
                        <?php $linha['senha_mensal']; ?> </a></td>
                <?php } ?>
            </tr>
        </tbody>
    </table>
</div>