public function beschikNieuwBestel($id) { $bestellingSERV = new BestellingService(); $datumsAlBesteld = array(); $datumsAlBesteld = $bestellingSERV->beschikbaarheidDatum($id); $bezetteDatums = array(); foreach ($datumsAlBesteld as $value) { array_push($bezetteDatums, $value["datum"]); } $diff = array(); $result = array(); $diff = array_diff($this->range, $bezetteDatums); $this->result = array_values($diff); $this->length = count($this->result); }