This page is a translated version of the page Manual:CheckUsernames.php and the translation is 50% complete.
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checkUsernames.php file is a maintenance script that is used to check that all usernames in the database (user table) are actually valid. Existing usernames can become invalid if User::isValidUserName() is altered or if $wgMaxNameChars is changed.


php checkUsernames.php

In case invalid usernames are found, the script returns the user_id and the username for each of the affected users.