Singleton Pattern

Singleton Pattern — a practical guide to singleton pattern PHP with clear examples you can reuse in real projects.

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Short description

Singleton restricts a class to one instance. It can hide dependencies and complicate testing — use sparingly.

Singleton sketch

final class Config {
    private static ?self $instance = null;
    private function __construct() {}
    public static function getInstance(): self {
        return self::$instance ??= new self();
    }
}