I have a short free text question with input box width 4 and max chars 4 where I want people to enter "+" or "-" followed by a number (three digits max), or zero. The regular expression I built to validate works OK when I test it on regex101.com/ , but not in LimeSurvey it seems. There, any number entered after "+" except zero(es), is rejected.
Regex used: "/^0|((\+|-)[0-9]{1,3})$/". See attached survey lss file.
Any suggestions?
I already made a bug report .
Tnx, Frank

I am not absolutely sure but when limesurvey see two curly braces is a line . It considers it as Expression manager.

I think it's the "+" character causing the trouble (survey logic check for the question is OK). "-" works fine!

fvanderstarre wrote: I already made a bug report .

Please post the ticket ID or full link, thanks.

When using "{" or "}" within a regex, the expression manager should not do any replacement since the regex is treated as a string.