is its code for displaying as the text the items chosen after multiple filtering questions?
This code - if placed on three pages of the questionnaire - will display the Items, that received a response code <3 in OS02, in question OS03. Please note, that this may also include missing responses (-1 and -9 for example).
Then, ob the next page, question OS04 will only display the items that got a code >2 in OS03.
And, then again on another page, the question OS05 will display only those items that got the responde code 1 in question OS04.
but if no item is left after filtering another feedback text will be displayed
Assumming, you use the code
$items = getItems('OS05', '==', 1) ;
question('OS06', $items);
Then you can use a little filter to display a text, of none item remains:
$items = getItems('OS05', '==', 1) ;
if (count($items) == 0) {
show('TX01'); // replace TX01 by the ID of your text
} else {
question('OS06', $items);
}