在插件或函数中。php文件放置：

if ( !function_exists( \'xxx_remove_attachment_permalink\' ) ) {
    function xxx_remove_attachment_permalink( $rules ) {
        foreach ( $rules as $regex => $query ) {
            if ( strpos( $regex, \'attachment\' ) || strpos( $query, \'attachment\' ) ) {
                unset( $rules[ $regex ] );
            }
        }

        return $rules;
    }
    add_filter( \'rewrite_rules_array\', \'xxx_remove_attachment_permalink\' );
}

if ( !function_exists( \'xxx_remove_attachment_link\' ) ) {
    function xxx_remove_attachment_link( $link ) {
        return;
    }
    add_filter( \'attachment_link\', \'xxx_remove_attachment_link\' );
}