Singleton PHP

singleton.php

<?php
class UserFactory
{
  private function __construct()
  {

  }

  public static function Instance()
  {
    static $user = null;
    if ($user === null) {
      $user = new UserFactory();
    }
    
    return $user;
  }
}

$fact = UserFactory::Instance();
$fact2 = UserFactory::Instance();
var_dump($fact== $fact2);