How to call non-static methods or properties from a static method?

Question

PHP

for example

class Dream
{
     private $mydream;
     private $findDream;
     public static function whichDream()
     {
         //Here
     }
     public function findDream()
    {
       // SOmething......
    }

}

How to call the usual findDream method from the wichDream static method??

Answer 1

As an option

class Dream
{
    private $mydream;
    private $findDream;
  
  private static $self = null;
  
  public static function _self()
  {
    if(is_null(self::$self)) {
      self::$self = new self;
    }
    
    return self::$self;
  }
  
    public static function whichDream()
    {
    return self::_self()->findDream();
    }
    
  public function findDream()
    {
       echo 'Test';
    }
}

Dream::whichDream();

Answer 2

self::findDream()

Answer 3

static::findDream()