XF 2.1 REGEX Username Validation

[Atmazphere]

Hi,

I'm looking to disable spaces in usernames, UTF codes, from being able to register on my forum.

So basically, letters and numbers only, how do I do this?

 

[deslocotoco]

Every time that i try this I get a error from XF.

Waiting for a reply too, but with spaces.

 

[AndyB]

Hi,

I'm looking to disable spaces in usernames, UTF codes, from being able to register on my forum.

So basically, letters and numbers only, how do I do this?

Here you go:

#^[a-zA-Z0-9]*[a-zA-Z][a-zA-Z0-9]*[a-z][a-zA-Z0-9]*$#i

This regex code will not allow spaces and just a number. It requires minimum of two alpha characters.

 

[Liam W]

Here you go:

#^[a-zA-Z0-9]*[a-zA-Z][a-zA-Z0-9]*[a-z][a-zA-Z0-9]*$#i

No, no, no, that's much more complicated than it needs to be. You literally only need /^[a-z0-9]+$/i (if you want spaces, /^[a-z0-9 ]+$/i).

 

[AndyB]

No, no, no, that's much more complicated than it needs to be. You literally only need /^[a-z0-9]+$/i (if you want spaces, /^[a-z0-9 ]+$/i).

I just edited my post. The reason for the additional regex code is to prevent a username from being just a number.

 

[Lukas W.]

Not sure why you would add uppercase and lowercase variants on a case insensitive regex...


To limit usernames to the modern English alphabet, numbers and underscores:

/^\w+$/

Modern English alphabet, numbers, underscores and whitespace:

/^[\w ]+$/

Modern English alphabet and numbers:

/^[a-z0-9]+$/i

Modern English alphabet, numbers and whitespace:

/^[a-z0-9 ]+$/i

 

[Liam W]

Modern English alphabet and numbers:

You've got an erroneous whitespace added on there.

 

[deslocotoco]

This is a nightmare.

 

[Kier]

/^[a-z0-9]+$/i is correct and will match letters and numbers only, excluding spaces, as required in the original post.

 

[deslocotoco]

How i permit the use too of á, à, ç, ã and that kind of characters and just letters, numbers, underlines and space?

Since my language is brazilian, i need the ' ´ ` ~ ç etc.

 

[Paul B]

Add any additional specific characters to the expression between the square brackets.

 

[Dryline]

Is there a way to add an expression in the brackets to eliminate usernames in all CAPS, like DRYLINE vs Dryline?

 

[gldtn]

How i permit the use too of á, à, ç, ã and that kind of characters and just letters, numbers, underlines and space?

Since my language is brazilian, i need the ' ´ ` ~ ç etc.

I'm using /^[a-z0-9À-ÿ_\-\ ]+$/i

a-z any letter
0-9 any digits/numbers
À-ÿ special characters (diacritics)
_ underscore
\-\ hyphen

and space for spacing.

Seems to work on the names I tested. If anyone that understand regex see anything wrong please let us know.

 

[deslocotoco]

I'm using /^[a-z0-9À-ÿ_\-\ ]+$/i

a-z any letter
0-9 any digits/numbers
À-ÿ special characters
_ underscore
\-\ hyphen

and space for spacing.

Seems to work on the names I tested. If anyone that understand regex see anything wrong please let us know.

Oh!

Thank you very much. I really need this. I cannot see non-ocidental letters in the nicks any more oh my board.

Deploying live now and i will keep you inform.

Update: The code /^[a-z0-9À-ÿ_\-\ ]+$/i is working perfectly for me. No errors and no more strange characters in the nicks of my board. Any administrator who runs a forum with Latin-based language should use this.

Thanks again!