i aşağıdaki sınıfları var.

class base {

    private function __construct(){
        //check if foo method exists 
        //$this->foo(); // if it exists
    }

    public static function singleton(){
        if(!isset(self::$singleton)){
            self::$singleton = new base();
        }
        return self::$singleton;
    }
}

class sub extends base{
    public function __construct() {
        parent::singleton();
    }

    public function foo(){

    }
}

o yüzden gibi init

$test = new sub();

my problem is that I want to check on base __construct if the sub has a foo method. but it doesn't seem to have this method.

Birisi nerede yanlış gitmiş bana söyleyebilir?