Untitled

<?php
function cadastrarUsuario($usuario){
	$pdo = conectar();
	$sql = "insert into usuarios(nome) values (?)";
	$cadastrar = $pdo->prepare($sql);
	$cadastrar->bindValue(1, $usuario);
	$cadastrar->execute();
	return $pdo->lastInsertId();
}

if(isset($_POST['cadastrar'])){
	$usuario = $_POST['nome'];
	$novoUsuario = cadastrarUsuario($usuario);
}
?>

<!DOCTYPE HTML>
<html lang="pt-br">
    <head>
	    <meta charset="utf-8"/>
	<!--<link href="estilo/estilo.css" rel="stylesheet"/>-->
	<title>Aplicando meus conhecimentos!</title>
    </head>
    <body>
	    <table>
		    <thead>
		        <th>Nome</th>
		        <th>E-Mail</th>
		        <th>Editar</th>
		        <th>Deletar</th>
		    </thead>
		    <tbody>
		         <?php $usuarios = listar(); ?>
		         <?php foreach ($usuarios as $usuario): ?>
		         <tr>
					<td><?php echo $usuario->nome; ?></td>
					<td><?php echo $usuario->email; ?></td>
					<td><a href="editar">Editar</a></td>
					<td><a href="deletar">Deletar</a></td>
		    	</tr>
		    	<?php endforeach; ?>
			</tbody>
	    </table>
	    <form method="post" action="">
			<input type="hidden" name="cadastrar"/>
			<label>Email:</label>
			<input type="text" maxlength="50" size="20" name="email"/><br/>
			<label>Nome:</label>
			<input type="text" maxlength="50" size="20" name="nome"/><br/>
			<label>Senha:</label>
			<input type="text" maxlength="16" size="16" name="senha"/><br/>
			<button type="submit">Cadastrar</button>
	    </form>
    </body>
</html>