我们需要为“sanitize\\u user”添加一个筛选器。

下面是适用于您的示例代码。

add_filter( \'sanitize_user\', \'tubs_sanitize_user\', 10, 3);
function tubs_sanitize_user($username, $raw_username, $strict) {
    $new_username = strip_tags($raw_username);
    // Kill octets
    $new_username = preg_replace(\'|%([a-fA-F0-9][a-fA-F0-9])|\', \'\', $new_username);
    $new_username = preg_replace(\'/&.?;/\', \'\', $new_username); // Kill entities

   // If strict, reduce to ASCII for max portability.
   if ( $strict )
        $new_username = preg_replace(\'|[^a-z0-9 _.\\-@+]|i\', \'\', $new_username);

    return $new_username;
}

Note: This code is the modified version of the original WordPress sanitize_user function.