Thread: Error message at Sign up page

Error message at Sign up page

One user is trying to sign up at my site using the string "PEWM" at field "User", but the site show him the message bellow:

<strong>ERROR</strong>: This username is invalid because it uses illegal characters. Please enter a valid username.

What's going on? Is there a bug? Is related to Classipress or Wordpress WPMU?

I'm using Wordpress WPMU 3.5.2, Classipress 3.3 and Advanced Custom Fields for ClassiPress.

Hi andreuerj,

I just tried to replicate this issue and used the same username PEWM on my test site. But i didn't have any problems to register and din't get that error message. So probably something else is causing this. Maybe a plugin or recently done change.

Cheers

I'm not sure, but I think it started happening after upgrading Wordpress to multisite (WPMU). Is there a way to debug it to identify the problem? I deactivated all the plug-ins and the error still happens.

I identified some lines of code that can be related to the problem:


"wp-admin\includes\user.php"

if ( !$update && isset( $_POST['user_login'] ) && !validate_username( $_POST['user_login'] ) )
$errors->add( 'user_login', __( '<strong>ERROR</strong>: This username is invalid because it uses illegal characters. Please enter a valid username.' ));



"public_html\wp-login.php"

// Check the username
if ( $sanitized_user_login == '' ) {
$errors->add( 'empty_username', __( '<strong>ERROR</strong>: Please enter a username.' ) );
} elseif ( ! validate_username( $user_login ) ) {
$errors->add( 'invalid_username', __( '<strong>ERROR</strong>: This username is invalid because it uses illegal characters. Please enter a valid username.' ) );
$sanitized_user_login = '';
} elseif ( username_exists( $sanitized_user_login ) ) {
$errors->add( 'username_exists', __( '<strong>ERROR</strong>: This username is already registered. Please choose another one.' ) );
}



"wp-content\themes\classipress\framework\includes\view s-login.php"

// Check the username
if ( $sanitized_user_login == '' ) {
$errors->add( 'empty_username', __('<strong>ERROR</strong>: Please enter a username.', APP_TD) );
} elseif ( ! validate_username( $posted['user_login'] ) ) {
$errors->add( 'invalid_username', __('<strong>ERROR</strong>: This username is invalid because it uses illegal characters. Please enter a valid username.', APP_TD) );
$sanitized_user_login = '';
} elseif ( username_exists( $sanitized_user_login ) ) {
$errors->add( 'username_exists', __('<strong>ERROR</strong>: This username is already registered, please choose another one.', APP_TD) );
}

The line of code blocking the sign up is inside "wp-content\themes\classipress\framework\includes\view s-login.php".

So, it's related to classipress. But why is it blocking?
The error message is not clear enough to let the users understand why.

After the following change at the source code, the user could sign up. But the change was only to identify the problem. So, I rolled back to the original code and now I'm asking for a fix.

// Check the username
if ( $sanitized_user_login == '' ) {
$errors->add( 'empty_username', __('<strong>ERROR</strong>: Please enter a username.', APP_TD) );
//} elseif ( ! validate_username( $posted['user_login'] ) ) {
//$errors->add( 'invalid_username', __('<strong>ERROR</strong>: This username is invalid because it uses illegal characters. Please enter a valid username.', APP_TD) );
//$sanitized_user_login = '';
} elseif ( username_exists( $sanitized_user_login ) ) {
$errors->add( 'username_exists', __('<strong>ERROR</strong>: This username is already registered, please choose another one.', APP_TD) );
}

Ohh my gosh! I made a test using the login "pewm" instead of "PEWM" and the sign up was successful! The error is related to uppercase letters in the registration proccess! It should not happen! In my opinion, the user should register himself without any problem when typing the login in upper case! And after the registration process, the login recorded in the database is in lower case! Login pewm, PEWM or PeWm should be interpreted as the same user!

I agree.

I have just tested this and have the exact same issue.

cp3.3.1 wp3.5.2

One plugin installed.

I tried to register with username: BLEET

Register

• ERROR: This username is invalid because it uses illegal characters. Please enter a valid username.

I found this function regarding a similar question else where on the net.


function fixUsernameCase($username){ $username = strtolower($username); return true; } add_filter ( 'authenticate', 'fixUsernameCase', 10, 1 );

Anyone know if this would work and where to put it?

I believe this changes the uppercase to lowercase prior to database entry.

Not sure though - experts help please?

So, I think you are not using wordpress multisite. Are you?

This issue is now fixed by way of a plugin.

And yes I am using both multisite and single install or wordpress.

http://forums.appthemes.com/advanced...up-page-54667/

Thanks to Artem for checking it for me and the guy who made it and me for finding it

Which plugin was causing this? Maybe it will be good to know for others with the same problem.

Cheers