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boolean getAnswerMissing()
The function getAnswerMissing()
can be used to determine whether a page is repeatedly displayed because there was a response missing, or because the specified format was not adhered to. This function can be used, for example, to display additional information.
Tip: If you run a customized response check, input a text element ID in the command repeatPage
to show this as an error message.
The following PHP code displays the text element “infoAB01” if the page is redisplayed due to a missing or incorrect response (e.g. in question AB01).
if (getAnswerMissing()) { text('infoAB01'); } question('AB01');