Don't allow people to register with some usernames like admin

Question

Don't allow some usernames like admin administrator or my site name

Comments

I was thinking about this one as well, good idea.

Answer 1

This is quite easily done with a filter plugin. Here's an example similar to what I use on my site:

function filter_handle( &$handle, $olduser )
{
  // allow admins to have whatever name they like
  if ( qa_get_logged_in_level() > QA_USER_LEVEL_ADMIN )
    return null;

  if ( preg_match('/admin|sitename/i', $handle) )
     return 'Sorry, that username is not allowed.';

  return null;
}

That matches anything with "admin" or "sitename" anywhere in the handle. 

Hope that helps!

Comments

HI Scott,

can we add this sample to adjust ? :

if ( preg_match('/admin|sitename|administrator|moderator/i', $handle) )
     return 'Sorry, that username is not allowed.';

Thank you
Claude

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Yes, but you don't need 'administrator' in there as 'admin' already matches that. It's matching each word anywhere in the username.

Instead of using preg_match you can just check for specific names, like
if ($handle == 'admin' || $handle == 'administrator')

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Thank you very much Scott for you help

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Thanks for this tip scott. I Appreciate.

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Has anyone turned this into an actual plugin?  Even with the code sample above and the plugin documentation it looks pretty daunting.