Untitled

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>jJulius</title>
</head>
<body>

    <?php
    $servername = "localhost";
    $database = "jjulius";
    $username = "root";
    $password = "";

    // Create connection
    $conn = mysqli_connect($servername, $username, $password, $database);

    // Check connection
    if (!$conn) {

        die("Connection failed: " . mysqli_connect_error());

    }
    echo "Connected successfully";
    ?>

    <?php
    if(isset($_POST['save']))
    {
        $valor=$_POST['valor'];


        $sql = "INSERT INTO valor (valor) VALUES ";
        $sql .= "('$valor')";
        mysqli_query($conn,$sql) or die("Erro ao tentar cadastrar registro");
        mysqli_close($conn);

    }

    ?>

    <form action="" method="post">
        <input type="text" name="valor" />
        <button type="submit" name="save">Enviar</button>
    </form>

</body>
</html>