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Php access static member by variable class name

Now I am working with the yii framework, and I would like to write something like this:

protected static $model = "Customer";
...
public function actionIndex() {
    $model::model()->find(...

Now it works:

protected static $model = "Customer";
protected static $model_obj;
...
public function __construct($controller, $id) {
    $this->model_obj = new self::$model;
...
public function actionIndex() {
    $model_obj::model()->find(...

but creating an object to access a static member is bad. how to avoid it?

getClass takes an object as the first parameter and is not suitable for this purpose

google say:

$a = constant($myClassName . "::CONSTANT");
$b = call_user_func(array($myClassName, "static_method"));

it looks like a terrible world of crap. using this can cause many problems. another solution?

about! my problem was different:

$controller::$NAME::model() // error

$controller_name = $controller::$NAME
$controller_name::model() // good

thank

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2 answers
class foo
{
  public static function bar()
  {
    return 42;
  }
}

// class name as string

$class = 'foo';

var_dump($class::bar()); // 42

// method name as string

$method = 'bar';

var_dump(foo::$method()); // 42

// class AND method names as strings

var_dump($class::$method()); // 42
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call_user_func(array($myClassName, "static_method"));

This is the main way to do this. I'm not quite sure why this will cause problems.

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