Restrict usernames to alphanumeric and underscore

In response to
http://www.vbulletin.com/forum/showt...614#post772614

User memobug wanted (and myself too) to have a way to restrict usernames to alphanumeric chars and underscore. To me it has been a headache with a lot of users because their password didn't work, just to find after investigation that their usernames had an space and they were writing it without it. I hope this helps others as it has helped me.

Here are the instructions to do it.

1) Go to your Admin Control Panel, Phrases Manager and create a new phrase named "username_invalidchars" in the "Front-end error messages" section.

For the text use something like "Username has invalid characters. Only characters allowed are letters, numbers and underscore."



2.- Open /forums/register.php

Somewhere around line 187 you will find the following

PHP Code:

$errors = array(); 


Add the following just below that

PHP Code:

//--------------------------------------------------
    // check username does not contain UNWANTED characters
    if (preg_match('/[^a-zA-Z0-9\_]+/', $_POST['username']))
    {
        //eval(print_standard_error('error_username_semicolon'));
        eval('$errors[11] = "' . fetch_phrase('username_invalidchars', PHRASETYPEID_ERROR) . '";');
    }
//------------------------------------------------- 


That's it, enjoy it.

[Tomek]

Originally Posted by clearchannel

I would like to install this hack in vB 3.06. I would also like to allow spaces in usernames. Which of the above code would be correct to use in 3.06?

PHP Code:

 if (preg_match('/[^a-zA-Z0-9\_\s]+/', $_POST['username'])) 


The \s is for spaces.

[Andy]

Thank you Reynaldovb. The hack works perfectly. I also allowed space and the period.

[evilTone]

installed
nice simple hack

mucho thanks

[slix]

This is great but I need it to go one further..... my new users must have both letters and numbers in their user name. How do I do that?

[slix]

*bump*

[rjordan]

It looks to me that it will allow numbers and letters already.

[slix]

Originally Posted by rjordan

It looks to me that it will allow numbers and letters already.

Yea I know it will, but I need it to force users to have both numbers and letters in their user name. For example "fred_20".

Any one?

[rjordan]

I have been looking, but have not found anything that I can get working. This WOULD be nice to have...

[Alphawolf83]

Simple little nice hack *clicks install*

[Tk1]

Hi all,

Will this work on vB 3.5.3 ?

If not, can anyone... perhaps port or upgrade it ?