<?php

namespace Cloudinary\Utils;

/**
 * Singleton Pattern.
 *
 * Modern implementation.
 */
class Singleton
{
    /**
     * Call this method to get singleton
     */
    public static function instance()
    {
        static $instance = false;
        if ($instance === false) {
            // Late static binding (PHP 5.3+)
            $instance = new static();
        }

        return $instance;
    }

    /**
     * Make constructor private, so nobody can call "new Class".
     */
    private function __construct()
    {
    }

    /**
     * Make clone magic method private, so nobody can clone instance.
     */
    private function __clone()
    {
    }

    /**
     * Make sleep magic method private, so nobody can serialize instance.
     */
    private function __sleep()
    {
    }

    /**
     * Make wakeup magic method private, so nobody can unserialize instance.
     */
    private function __wakeup()
    {
    }

}