Ok now the header code works (page A). I'm now making page B and so i make a plugin
Hook Location: register_form_complete
Title: Test
Php code:
PHP Code:
$email = htmlspecialchars(trim($_GET['email']));
echo '<form method="get"><input type="text" name="email" value="' . $email . '"><input type="submit" value="Register">';
I tried but it didn't work in register.php i see the input text but in page a when i click continue i have to rewrite the email