function csrf() {
		return Cache::instance()->
			exists(($this->sid?:session_id()).'.@',$data)?
				$data['csrf']:FALSE;
	}
function csrf() {
		return Cache::instance()->
			exists(($this->sid?:session_id()).'.@',$data)?
				$data['csrf']:FALSE;
	}
function csrf ( ) { return Cache :: instance ( ) -> exists ( ( $ this -> sid ? : session_id ( ) ) . '.@' , $ data ) ? $ data [ 'csrf' ] : FALSE ; }
Return anti-CSRF token
@return string|FALSE
Return anti - CSRF token