Design Patterns

Design patterns are reusable solutions to common software design problems.

They help developers build flexible and maintainable applications.

Common PHP design patterns include:

• Singleton
• Factory
• Strategy
• Observer

Example Pattern Structure

interface Logger {
    public function log(string $message);
}

class FileLogger implements Logger {
    public function log(string $message) {
        echo "Writing to file: $message";
    }
}