array(3) { [0]=> string(13) "text_training" [1]=> string(15) "reservation_btn" [2]=> string(14) "tab_references" } int(12334) array(3) { [0]=> string(13) "text_training" [1]=> string(15) "reservation_btn" [2]=> string(14) "tab_references" } int(12334) string(20) "Zit niet in de array"