Jagepard / PhpDesignPatterns-Singleton

src/Singleton.php

<?php

/**
 * @author  : Jagepard <jagepard@yandex.ru>
 * @license https://mit-license.org/ MIT
 */

namespace AntiPatterns\Singleton;

final class Singleton
{
    /**
     * @var Singleton
     */
    private static $instance;

    /**
     * Gets an object instance
     * --------------------------
     * Получает экземпляр объекта
     * 
     * @return self
     */
    public static function getInstance(): self
    {
        if (!self::$instance instanceof self) {

self::instance is always a sub-type of self.

            self::$instance = new self();
        }

        return self::$instance;
    }

    public function __construct()
    {
    }

    /**
     * @codeCoverageIgnore
     */
    public function __sleep()
    {
    }

    /**
     * @codeCoverageIgnore
     */
    public function __wakeup()
    {
    }

    /**
     * @codeCoverageIgnore
     */
    public function __clone()
    {
    }
}