Blank Regular Expression

Question

Using Cforms and adding some validation in, thought i'd throw in the Honeypot method as well. With cforms it allows you to add a Regex into a field, but I have been trying to figure out how to create a "blank" regex.

the best I have so far is to put a space into the field then use this regex: ^\s This works perfectly well, but just out of pure interest, is there a pure blank version, so that if ANY character is typed in then it won't validate.

Thanks

[this](http://stackoverflow.com/questions/5063977/regex-empty-string-or-email/5063991#5063991) may help — Jamie Taylor, Jul 26 '13 at 09:31
Same method as posted below, but for some reason it won't validate if left blank! Looks like I will just stick to the space method :) — Damian Smith, Jul 26 '13 at 09:37

score 3 · Answer 1 · answered Jul 26 '13 at 09:31

3

Like this? ^$ (start+end with nothing in between).

answered Jul 26 '13 at 09:31

Prinzhorn

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Tried this method, but even if left blank it doesn't validate – Damian Smith Jul 26 '13 at 09:35
@DamianSmith I don't know what "Cforms" is, maybe the validation logic works different than expected. – Prinzhorn Jul 26 '13 at 09:56
This should work in cforms - try using something like: Phone||^$|err:Please leave this field blank|html5:0¤0¤¤¤¤¤ – Steve de Niese May 20 '14 at 05:45

score 1 · Answer 2 · answered Jul 26 '13 at 09:36

1

Just to add another way of doing the same thing: .{0}

answered Jul 26 '13 at 09:36

marcv

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Blank Regular Expression

2 Answers2