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.

[Reynaldovb]

It would probably work but it is not recommended, and my knowledge about how vB 3.5+ works is not as good as I would want to. I could try to port it next weekend as I need it for my forums too. :-(

[Reynaldovb]

Well, what do you know? I decided to give it a try and in just a few minutes I had a working version for vB 3.5.x :-)

https://vborg.vbsupport.ru/showthread.php?t=106877

[Roms]

Thanks, Works great!! Cheers!

[josiespencer]

I couldn't find your original anchor point in register.php so I put it in the code just after referrer and before the image check. It looks like this:

PHP Code:

// check referrer
if ($vbulletin->GPC['referrername'] AND !$vbulletin->userinfo['userid'])
{
$userdata->set('referrerid', $vbulletin->GPC['referrername']);
}

//-------------------------------------------------- 
// 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) . '";'); 
} 
//-------------------------------------------------  

// Check Reg Image
if ($vbulletin->options['regimagecheck'] AND $vbulletin->options['regimagetype'])
{
    require_once(DIR . '/includes/functions_regimage.php');
    if (!verify_regimage_hash($vbulletin->GPC['imagehash'], $vbulletin->GPC['imagestamp']))
    {
    $userdata->error('register_imagecheck');
      }
} 


But it doesn't work. I was able to add Sister Mary Sunshine no problem. Any clue?

[Daniel]

Originally Posted by josiespencer

I couldn't find your original anchor point in register.php so I put it in the code just after referrer and before the image check. It looks like this:

PHP Code:

// check referrer
if ($vbulletin->GPC['referrername'] AND !$vbulletin->userinfo['userid'])
{
$userdata->set('referrerid', $vbulletin->GPC['referrername']);
}

//-------------------------------------------------- 
// 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) . '";'); 
} 
//-------------------------------------------------  

// Check Reg Image
if ($vbulletin->options['regimagecheck'] AND $vbulletin->options['regimagetype'])
{
    require_once(DIR . '/includes/functions_regimage.php');
    if (!verify_regimage_hash($vbulletin->GPC['imagehash'], $vbulletin->GPC['imagestamp']))
    {
    $userdata->error('register_imagecheck');
      }
} 


But it doesn't work. I was able to add Sister Mary Sunshine no problem. Any clue?

Bump. Anyone?