Network Username Restrictions Override

By default, WordPress network usernames cannot contain anything but lowercase letters and numbers. This plugin adds network options to let you include hyphens, underscores, or uppercase letters, if desired.

Furthermore, this plugin gives you the option to allow email addresses as usernames, or to allow all-numeric usernames (e.g. “1234”).

Finally, this plugin lets you override the minimum length for usernames (which defaults to four characters).

To follow updates to this plugin, visit:

https://danieltwc.com/

For help with this version, visit:

https://danieltwc.com/2011/network-username-restrictions-override-1-0/

1. Login as a network admin and navigate to the Network Admin panel.
2. Upload the network-username-restrictions-override folder to your plugins folder, usually wp-content/plugins. (Or simply via the built-in installer.)
3. Network Activate the plugin on the Plugins screen.
4. Under Settings, enable any of the additional characters or formats for usernames.
5. Add new users via the Users menu.

1. 

   Plugin options

1.3

• Add PHP 7/8 compatibility by updating constructor to use __construct
• Update username check to match current WordPress error messages

1.2

• Remove use of call-time pass by reference to avoid warnings on PHP 5.3 and newer
• Secondary username length check no longer causes an error when adding a username longer than the configured minimum
• Match error message with https://core.trac.wordpress.org/changeset/20441
• Add support for periods in usernames

1.1

• Update plugin URIs
• Add a check for super admins setting the minimum username length to longer than four characters

1.0

• Initial release