if (isset($_POST["submit"])) {
$username = $_POST["username"];
$email = $_POST["email"];
echo "Submit successfully";
echo "<br>";
echo "Your username: " . $username;
echo "<br>" . "Your email: " . $email;
}<!doctype html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport"
content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>Document</title>
</head>
<body>
<form action="index.php" method="post">
<label>Email: <input type="email" name="email" placeholder="Enter email" required></label>
<br><br>
<label>Username: <input type="text" name="username" placeholder="Enter username" required></label>
<input type="submit" name="submit">
</form>
</body>
</html>
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