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

Answer 1

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

Answer 2

只是添加了另一种做相同事情的方式： .{0}