set_state

class Kin
{
        public static function __set_state($array)
        {
            $obj = new Kin;
            $obj->var1 = $array['var1'];
            $obj->var2 = $array['var2'];
            return $obj;
        }

}

$instance = new Kin;
$instance->var1 = 'foo';
$instance->var2 = 'bar';

//output Kin::__set_state(array( 'var1' => 'foo', 'var2' => 'bar', ))
echo var_export($instance,true);