QS:Preg validation
From LimeSurvey Manual
Validatie (met reguliere expressies) (preg_validation)
Beschrijving
Met deze optie kun je een reguliere expressie specificeren waarmee je alle delen van een vraag kunt controleren.
If any question or subquestion value does not meet the validation requirements, the background color of the text entry field will be changed to red so that users can easily see which parts of the question need to be corrected. Thus, you can do on-page validation. In this way you will not need to wait for the user to click on the submit button to validate the respective question.
Geldige waarden
- elke geldige reguliere expressie
Example
- Click here to check multiple examples.