I installed MediaWiki recently. I turned off my shop because usernames that have spaces and characters other than alphanumeric may crash member's accounts. As a result, I changed everyone's names and then limited new user registrations to only alphanumeric characters with no spaces.
AdminCP/Settings/Options/User Registration Options/Username Regular Expression
You may require the username to match a regular expression (PCRE). The admin help provides some examples that may be useful. To disable this function leave the option blank.
^[A-Z0-9]+$
Unfortunately, this restriction is circumvented when buying a Name change in this modification. Is there a way you can fix this please?
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