How can the code be refactored to improve readability and maintainability, considering the complex logic involved in user authentication?

The code can be refactored by breaking down the complex logic of user authentication into separate functions for better readability and maintainability. This way, each function can handle a specific aspect of authentication, making the code easier to understand and modify. 

function authenticateUser($username, $password){
    if(validateCredentials($username, $password)){
        return generateAuthToken($username);
    } else {
        return false;
    }
}

function validateCredentials($username, $password){
    // Logic to validate user credentials
    return true; // Return true for demonstration purposes
}

function generateAuthToken($username){
    // Logic to generate authentication token
    return "random_auth_token"; // Return a random token for demonstration purposes
}

// Usage
$username = "example_user";
$password = "password123";

$authToken = authenticateUser($username, $password);

if($authToken){
    echo "Authentication successful. Auth Token: " . $authToken;
} else {
    echo "Authentication failed.";
}

Keywords

refactoring readability maintainability complex logic user authentication

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