<?php
session_start();
?>
<form action="submit.php" method="POST">

    <input type="text" name="name" value="" placeholder="Username or Email" id="uname">
    <?php if (!empty($_SESSION['name_error'])) { ?>
        <span class="error">* <?= $_SESSION['name_error'] ?></span>
    <?php } ?>

    <input type="password" name="password" value="" placeholder="Password" id="password">
    <?php if (!empty($_SESSION['pass_error'])) { ?>
        <span class="error">* <?= $_SESSION['pass_error'] ?></span>
    <?php } ?>

    <input type="submit" name="save" value="Submit">

</form>

<?php
session_start();
$x = "typepass";
if (isset($_POST['save'])) {
    if (empty($_POST['name'])) {
        $_SESSION['name_error'] = "Name is Required";
    } else {
        $name = $_POST['name'];
    }
    if (empty($_POST['password'])) {
        $_SESSION['pass_error'] = "password is required";
    } elseif ($_POST['password'] !== $x) {
        $_SESSION['pass_error'] = "password doesn't match";
    } else {
        $password = $_POST['password'];
    }
    //print "Username :" . " " . $name . "<br>" . "Password :" . " " . $password;
    header("Location:" . $_SERVER['HTTP_REFERER']);
}
?>