请参阅get_users() Codex entry.

$users = get_users();

$args = array(
    // Order by username (display name)
    // Note: \'login\' is default
    \'orderby\' => \'display_name\',
    // Order (note: \'ASC\' is default)
    \'order\' => \'ASC\'
);

$users = get_users( $args );

会不会get_users WordPress的功能是否满足您的需要？