WordPress 禁止用户注册某些用户名

/**
 * WordPress 禁止用户注册某些用户名
 * https://www.wpdaxue.com/wordPress-username-restrictions.html
 */
function sozot_validate_username($valid, $username) {
	$forbidden = array('directory', 'domain', 'download', 'downloads', 'edit', 'editor', 'email', 'ecommerce', 'forum', 'forums', 'favorite', 'feedback', 'follow', 'files', 'gadget', 'gadgets', 'games', 'guest', 'group', 'groups', 'homepage', 'hosting', 'hostname', 'httpd', 'https', 'information', 'image', 'images', 'index', 'invite', 'intranet', 'indice', 'iphone', 'javascript', 'knowledgebase', 'lists','websites', 'webmaster', 'workshop', 'yourname', 'yourusername', 'yoursite', 'yourdomain');
	$pages = get_pages();
	foreach ($pages as $page) {
		$forbidden[] = $page->post_name;
	}
	if(!$valid || is_user_logged_in() && current_user_can('create_users') ) return $valid;
	$username = strtolower($username);
	if ($valid && strpos( $username, ' ' ) !== false) $valid=false;
	if ($valid && in_array( $username, $forbidden )) $valid=false;
	if ($valid && strlen($username) < 5) $valid=false;
	return $valid;
}
add_filter('validate_username', 'sozot_validate_username', 10, 2);

function sozot_registration_errors($errors) {
	if ( isset( $errors->errors['invalid_username'] ) )
		$errors->errors['invalid_username'][0] = __( '错误：该用户名不允许注册！', 'sozot' );
	return $errors;
}
add_filter('registration_errors', 'sozot_registration_errors');