Disallow Special Chars in Username

[Neo]

THis would be great to have ( to lazy to make it ) but I have some poeple come on my site and register names like

~~~Mary~~~

and that for some odd reason makes me mad... so it would like a hack that only allows letters and numbers at registration.

thanks for your time

- Dan :ninja:

[Logician]

In register.php find:

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

before that add:

------ cut -----------
// enter not allowed chars here seperated with a space:
$illegaluserchars=', . ~ ;';

$dontlethimuse=explode(" ",$illegaluserchars);

while (list($key,$val)=each($dontlethimuse))
{
if (strpos($username,$val))
{
eval("standarderror(\"".gettemplate("error_notallo wedusername")."\");");exit;
}
}
------ cut -----------

Create a template named "error_notallowedusername" and specify your error message that will be posted if someone enters an invalid char.

This is not tested so it may require some polishing and debugging, but needless to say, you can handle it perfectly. Also dont forget to add another if clause if you want to ban space or ' char..Enjoy..

Regards,
Logician

[Logician]

ops I've just noticed that you ONLY want numbers or letters in the username. So this is easier to apply:

PHP Code:

if (!preg_match("/^[a-zA-Z0-9]+$/",$username)) 
{ 
eval("standarderror(\"".gettemplate("error_notallowedusername")."\");");exit; 
} 


[Neo]

thank you this really take some of my stress of coding off

[Joshua Clinard]

I use the code in this post on my board.

The update in this post did not work at all for me, but I posted a fix for the problem I was having.

You can change the text to say anything you want.

[Eggie]

sorry to bring back a REALLY OLD thread. but after endless searching, this was the only post regarding this I could find.

Will this code also work with vB 3.0.8 If not, could you please provide me with a code that would.

[Logician]

Originally Posted by Eggie

sorry to bring back a REALLY OLD thread. but after endless searching, this was the only post regarding this I could find.

Will this code also work with vB 3.0.8 If not, could you please provide me with a code that would.

For vb 3.0.x, edit register.php, find:

PHP Code:

// strip 'blank' ascii chars if admin wants to do so 


BEFORE that line add (as a new line, NOT on the LEFT of it!):

PHP Code:

// Logician Hack Start
// enter not allowed chars here seperated with a space:
$illegaluserchars=', . ~ ;';

$dontlethimuse = explode(" ",$illegaluserchars);

while (list($key,$val)=each($dontlethimuse))
{
    if (strpos($_POST['username'],$val))
   {
    $errors[11] = "You can not use ..... characters in username!";
   }
}
// Logician Hack End 


[Eggie]

great! and this will provent usernames from having a space also?

[paul41598]

Originally Posted by Eggie

great! and this will provent usernames from having a space also?

thanks!

[Andreas]

Maybe easier:

PHP Code:

if (preg_match('/[,|\.|~|;]/', $_POST['username'])
{
    $errors[11] = "You can not use ..... characters in username!";
}