Untitled

<!DOCTYPE html>
<html lang="pt-br">
    <head>
        <meta charset="utf8_general_ci">
            <title> sistema de cadastro</title>
            <link rel="stylesheet" href="_css/estilo.css">
    </head>
    <body>
        <div class="container">
        <nav>
        <ul class="menu">
            <a href="index.php"<li>Cadastro</li></a>

            <a href="consultas.php" <li>Consultas</li></a>
            </ul>

        </nav>
        <section>
        <h1>Cadastro de Usuario</h1>
        <hr><br><br>
        <form method="post" action= "processa.php">
        <input type="submit" value="Salvar" class="btn">
        <input type="reset" value="Limpar" class="btn">
        <br><br>

        Nome <br>
        <input type="text" name= "nome" class= "campo" maxlength="40" required autofocus> <br>
        Email <br>
        <input type="email" name="Email" class="campo" maxlength="50" required><br>
        Profissao <br>
        <input type="text" name="Profissao" class="campo" maxlength="40" required><br>

        </form>


        </section>
        </div>
    </body>
<html>

<?php

$hostname = "localhost";
$user = "root";
$password = "";
$database = "cadastro4";
$conexao = mysqli_connect($hostname, $user, $password, $database);
if (! $conexao){
echo "falha na conexao com o banco de dados";

<?php

include_once ("conexao.php");
$nome =$_POST ('$nome');
$email=$_POST ('Email');
$profissao=$_POST ('Profissao');

$sql = ("insert into usuarios3 (nome,email, profissao) values ('$nome', '$email', '$profissao')");

$salvar = mysqli_query ($conexao, $sql);


mysqli_close ($conexao);

?>

$nome = $_POST['nome'];
$email= $_POST['Email'];
$profissao= $_POST['Profissao'];