How to break singleton pattern in PHP - https://habr.com/ru/post/450554/

break_singleton.php

<?php

final class Singleton
{
    private static $instance;
    
    public static function getInstance()
    {
        if (null === self::$instance) {
            self::$instance = new self();
        }
        
        return self::$instance;
    }
    
    private function __construct()
    {
    }
    
    private function __clone()
    {
    }
    
    private function __wakeup()
    {
    }
}

$s1 = Singleton::getInstance();
var_dump(spl_object_id($s1));

$createNewInstance = function () {
    return new self();
};

$newInstanceClosure = Closure::bind($createNewInstance, $s1, Singleton::class);
$s2 = $newInstanceClosure();

var_dump(spl_object_id($s2));

Sandbox with this snippet: http://sandbox.onlinephpfunctions.com/code/de3670c22d3d478f744572e0d896c22afdf54ab5