Re: [Phplib-users] Invalid Regex

[Matt W. <li...@ye...>]

On Thursday 31 October 2002 18:32, Rob Hutton wrote:

> I am trying to validate the username field, and just to make up some
> arbitrary rules, it has to be between 6 and 25 characters long and have=
 no
> punctuation.  So my valid regex looks something like "[A-Za-z0-9]{6,}" =
but
> how do I tell it to fail if is has anything else?  Like invalid_regex =3D
> "[^A-Za-z0-9]"?

Hi Rob

to check for alphanumeric chars between 6 and 25 chars use

"^[a-zA-Z0-9]{6,25}$"

This will bail if it's not like that.

You can drop A-Z bit depending on whether you're using ereg or eregi

matt