how should i proceed to redirect user after successful registration

hi, i am new to programming and here i have some sample of codes that i am working with.

register.php

`/ Change this to your connection info.
$DATABASE_HOST = ‘localhost’;
$DATABASE_USER = ‘root’;
$DATABASE_PASS = ”;
$DATABASE_NAME = ”;
// Try and connect using the info above.
$con = mysqli_connect($DATABASE_HOST, $DATABASE_USER, $DATABASE_PASS, $DATABASE_NAME);
if (mysqli_connect_errno()) {
// If there is an error with the connection, stop the script and display the error.
exit(‘Failed to connect to MySQL: ‘ . mysqli_connect_error());
}
// Now we check if the data was submitted, isset() function will check if the data exists.
if (!isset($_POST[‘username’], $_POST[‘password’], $_POST[’email’])) {
// Could not get the data that should have been sent.
exit(‘Please complete the registration form!’);
}
// Make sure the submitted registration values are not empty.
if (empty($_POST[‘username’]) || empty($_POST[‘password’]) || empty($_POST[’email’])) {
// One or more values are empty.
exit(‘Please complete the registration form’);
}
if (!filter_var($_POST[’email’], FILTER_VALIDATE_EMAIL)) {
exit(‘Email is not valid!’);
}
if (preg_match(‘/^[a-zA-Z0-9]+$/’, $_POST[‘username’]) == 0) {
exit(‘Username is not valid!’);
}
if (strlen($_POST[‘password’]) > 20 || strlen($_POST[‘password’]) < 5) {
exit(‘Password must be between 5 and 20 characters long!’);
}
// We need to check if the account with that username exists.
if ($stmt = $con->prepare(‘SELECT id, password FROM accounts WHERE username = ?’)) {
// Bind parameters (s = string, i = int, b = blob, etc), hash the password using the PHP password_hash function.
$stmt->bind_param(‘s’, $_POST[‘username’]);
$stmt->execute();
$stmt->store_result();
// Store the result so we can check if the account exists in the database.
if ($stmt->num_rows > 0) {
// Username already exists
echo ‘Username exists, please choose another!’;
} else {
// Username doesnt exists, insert new account
if ($stmt = $con->prepare(‘INSERT INTO accounts (username, password, email) VALUES (?, ?, ?)’)) {
// We do not want to expose passwords in our database, so hash the password and use password_verify when a user logs in.
$password = password_hash($_POST[‘password’], PASSWORD_DEFAULT);
$stmt->bind_param(‘sss’, $_POST[‘username’], $password, $_POST[’email’]);
$stmt->execute();
echo ‘You have successfully registered, you can now login!’;

} else {
// Something is wrong with the sql statement, check to make sure accounts table exists with all 3 fields.
echo ‘Could not prepare statement!’;
}
}
$stmt->close();
} else {
// Something is wrong with the sql statement, check to make sure accounts table exists with all 3 fields.
echo ‘Could not prepare statement!’;
}
$con->close();`

and below i will post the home.php file on which i want the user to land and be logged in. registration is working and logging in too. simply after registering it doesnt redirect to home page and stay on the page with the “You have successfully registered, you can now login”.

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