How does implementing interfaces in PHP classes improve code organization and structure?

Implementing interfaces in PHP classes improves code organization and structure by enforcing a contract that specifies which methods a class must implement. This helps in standardizing the structure of classes and promotes consistency across different parts of the codebase. Additionally, interfaces allow for easier swapping of different implementations of a certain functionality without affecting the rest of the code.

interface LoggerInterface {
    public function log($message);
}

class FileLogger implements LoggerInterface {
    public function log($message) {
        // Implementation of logging to a file
    }
}

class DatabaseLogger implements LoggerInterface {
    public function log($message) {
        // Implementation of logging to a database
    }
}