vb.org Archive - Prevent use of symbols in usernames

vb.org Archive (https://vborg.vbsupport.ru/index.php)

- Modification Requests/Questions (Unpaid) (https://vborg.vbsupport.ru/forumdisplay.php?f=112)

- - Prevent use of symbols in usernames (https://vborg.vbsupport.ru/showthread.php?t=33086)

Joshua Clinard

12-09-2001 08:18 PM

I don't want people to be able to sign up with symbols in their usernames, like the forwards slash, and the paranthases, and so on. The only symbol I want people to be able to use in thier username is the underscore. No periods, commas, or other symbols or punctuation marks. Is there a way to prevent this?

Scott MacVicar

12-09-2001 10:09 PM

open register.php

look for

PHP Code:


		
			
  if (strlen($username)<$minuserlength) {

    eval("standarderror(\"".gettemplate("error_usernametooshort")."\");");

    exit;

  } elseif (strlen($username)>$maxuserlength) {

    eval("standarderror(\"".gettemplate("error_usernametoolong")."\");");

    exit;

  }

below it add

PHP Code:


		
			
  if(!preg_match("/^[a-zA-Z_0-9]+$/", $username)) {

    eval("standarderror(\"Invalid Characters you can only use a-z, 1-9 or an underscore in your username.\");");

    exit;

  }

Joshua Clinard

12-10-2001 12:31 AM

Thanks. I'm just curious, but has this been tested?

Scott MacVicar

12-10-2001 12:08 PM

Yeah it will work, it allow characters for a-z A-Z underscore and numbers in the range 0-9.

Hence the

a-zA-Z_0-9

but i believe that

PHP Code:


		
			
if (!preg_match("/^\w+$/", $username)) {

  eval("standarderror(\"Invalid Characters you can only use a-z, 1-9 or an underscore in your username.\");");

  exit;

}

as \w represents word in perl thought it depends on locale settings

Joshua Clinard

12-16-2001 07:48 PM

I didn't realize that this hack was also going to prevent the use of spaces. I don't want it to do that. Is there anyway to fix that? If I just typed in a space after the _ would that do it? By the way, I don't get what you were trying to say in your last post! Can you tell me what that means?

Joshua Clinard

12-18-2001 03:50 PM

Can someone please help? I want to get this fixed.

StarBuG

01-08-2002 03:07 PM

ever tried to use the html code for space in that definition?
"& n b s p ;" or "& # 1 6 0 ;" (without the spaces and "!)

like

PHP Code:


		
			
if(!preg_match("/^[a-zA-Z_0-9& n b s p ;]+$/", $username)) {

    eval("standarderror(\"Invalid Characters you can only use a-z, 1-9 or an underscore in your username.\");");

    exit;

  }

(also without spaces of course)

don?t know if it works but it is woth a try ;)

Greetings

StarBuG

Joshua Clinard

01-10-2002 03:03 PM

The answer is to add a space after 9 in this code

PHP Code:


		
			
[a-zA-Z_0-9 ]

This has been tested. Thanks to Hoojx for help with this.

Scott MacVicar

01-10-2002 03:25 PM

this works as well

PHP Code:


		
			
if (!preg_match("/^w+$/", $username)) {

  eval("standarderror(\"Invalid Characters you can only use a-z, 1-9 or an underscore in your username.\");");

  exit;

}

Sion	06-27-2002 10:15 AM

How can I allow a dash (-) aswell? Coz when I added it it didn't seem to work!

--Sion

Logician

06-27-2002 10:38 AM

use in this format:

[a-zA-Z_0-9\- ]

Sion	07-01-2002 01:05 PM

How can I prevent ppl signing up with - and _ at the beginning/end of their usernames, so that they're valid for email addresses (ie. username@mydomain.com)

Thanks!

Joshua Clinard

08-30-2002 04:05 PM

Glad someone else got some use out of this mod. I thought I was the only one using it.

N9ne	08-30-2002 04:55 PM

Maybe it should be released..

stan111

02-01-2007 05:04 AM

how come i can't find any of those code under register.php

Princeton

02-01-2007 01:31 PM

you brought up an old thread .... check the date :D

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