public function createURL() {
		$url = "https://secure.gravatar.com/avatar/".$this->createHash();
		$url = $url."?s=".$this->size."&d=".$this->default."&r=".$this->rating;
		
		if($this->forceDefault == true) {
			$url = $url.'&f=y';
		}
		return $url;
	}