What are some best practices for integrating user registration across multiple self-programmed systems and WordPress?

When integrating user registration across multiple self-programmed systems and WordPress, it is important to ensure that the registration process is seamless for users and that their information is synchronized across all platforms. One way to achieve this is by using a centralized user database that can be accessed by both the custom systems and WordPress. By creating a custom registration form that interacts with this centralized database, users can register once and have their information shared across all platforms. 

// Example code for custom registration form that interacts with a centralized user database

// Connect to the centralized user database
$database_connection = new mysqli('localhost', 'username', 'password', 'centralized_database');

// Process registration form submission
if(isset($_POST['register'])) {
    $username = $_POST['username'];
    $email = $_POST['email'];
    $password = $_POST['password'];
    
    // Insert user information into the centralized database
    $query = "INSERT INTO users (username, email, password) VALUES ('$username', '$email', '$password')";
    $result = $database_connection->query($query);
    
    if($result) {
        echo "User registered successfully!";
    } else {
        echo "Error registering user. Please try again.";
    }
}

Keywords

user registration integration multiple systems WordPress self-programmed

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