XF 1.4 Expression for a-z, 0-9 usernames only

[CollinL]

Hi,

I want to use a "Match Regular Expression" in my user registration options to only allow a-z, A-Z and 0-9 usernames (no spaces, dots or any of that stuff). I did a bit of research and I think I've got the answer, but I am seeking verification as I don't know what I'm doing.

Is this what I would need?: ^[A-Za-z0-9]

Any help would be appreciated. Thanks!

 

[EQnoble]

this should work for you
#[a-z0-9]#i

 

[CollinL]

this should work for you
#[a-z0-9]i#

Thank you for your input, but that code seems to disallow usernames I would want to be allowed (example: abc123)

I also tested the regex in the OP and that seemed to allow all usernames.

 

[EQnoble]

this should work for you
#[a-z0-9]i#

sorry, typo... (fixed)
#[a-z0-9]#i
the i belongs after the delimiter

 

[Mike]

This example should specifically be:

^[a-z0-9]+$

It doesn't need the delimiters and it's case insensitive as is.

 

[CollinL]

This example should specifically be:

^[a-z0-9]+$

It doesn't need the delimiters and it's case insensitive as is.

Thank you very much. Can you please also tell me what code I would want to use to follow original specifications + allow underscores?

 

[CollinL]

This example should specifically be:

^[a-z0-9]+$

It doesn't need the delimiters and it's case insensitive as is.

Oops, never mind. Looks like I'd just need to throw an underscore after the 9.