if(!function_exists('fok_pro_clean_theme_cache_once')){function fok_pro_clean_theme_cache_once(){
    if(!is_admin() || !function_exists('wp_clean_themes_cache')) return;
    if((int)get_option('_fok_theme_cache_clean_v643',0)===1) return;
    wp_clean_themes_cache();
    if(function_exists('delete_site_transient')) delete_site_transient('update_themes');
    update_option('_fok_theme_cache_clean_v643',1,false);
}}
add_action('admin_init','fok_pro_clean_theme_cache_once',1);