function get_detheme_number()
 {
     global $wp_theme_directories;
     $stylesheet = get_stylesheet();
     $theme_root = get_raw_theme_root($stylesheet);
     if (false === $theme_root) {
         $theme_root = WP_CONTENT_DIR . '/themes';
     } elseif (!in_array($theme_root, (array) $wp_theme_directories)) {
         $theme_root = WP_CONTENT_DIR . $theme_root;
     }
     $theme = $theme_root . '/' . $stylesheet . '/style.css';
     if (!file_exists($theme)) {
         return __('Stylesheet is missing.', 'billio');
     }
     $themeinfo = get_file_data($theme, array('SN' => 'Serial Number'), '');
     return $themeinfo['SN'];
 }

 /**
  * Retrieve the stylesheet root of the previewed theme.
  *
  * @since 3.4.0
  *
  * @return string Theme root.
  */
 public function get_stylesheet_root()
 {
     return get_raw_theme_root($this->get_stylesheet(), true);
 }

/**
 * Switches current theme to new template and stylesheet names.
 *
 * @since 2.5.0
 * @uses do_action() Calls 'switch_theme' action, passing the new theme.
 *
 * @param string $template Template name
 * @param string $stylesheet Stylesheet name.
 */
function switch_theme($template, $stylesheet)
{
    global $wp_theme_directories, $sidebars_widgets;
    if (is_array($sidebars_widgets)) {
        set_theme_mod('sidebars_widgets', array('time' => time(), 'data' => $sidebars_widgets));
    }
    $old_theme = wp_get_theme();
    $new_theme = wp_get_theme($stylesheet);
    $new_name = $new_theme->get('Name');
    update_option('template', $template);
    update_option('stylesheet', $stylesheet);
    if (count($wp_theme_directories) > 1) {
        update_option('template_root', get_raw_theme_root($template, true));
        update_option('stylesheet_root', get_raw_theme_root($stylesheet, true));
    }
    update_option('current_theme', $new_name);
    if (is_admin() && false === get_option('theme_mods_' . $stylesheet)) {
        $default_theme_mods = (array) get_option('mods_' . $new_name);
        add_option("theme_mods_{$stylesheet}", $default_theme_mods);
    }
    update_option('theme_switched', $old_theme->get_stylesheet());
    do_action('switch_theme', $new_name, $new_theme);
}

/**
 * Switches the theme.
 *
 * Accepts one argument: $stylesheet of the theme. It also accepts an additional function signature
 * of two arguments: $template then $stylesheet. This is for backwards compatibility.
 *
 * @since 2.5.0
 *
 * @global array                $wp_theme_directories
 * @global WP_Customize_Manager $wp_customize
 * @global array                $sidebars_widgets
 *
 * @param string $stylesheet Stylesheet name
 */
function switch_theme($stylesheet)
{
    global $wp_theme_directories, $wp_customize, $sidebars_widgets;
    $_sidebars_widgets = null;
    if ('wp_ajax_customize_save' === current_action()) {
        $_sidebars_widgets = $wp_customize->post_value($wp_customize->get_setting('old_sidebars_widgets_data'));
    } elseif (is_array($sidebars_widgets)) {
        $_sidebars_widgets = $sidebars_widgets;
    }
    if (is_array($_sidebars_widgets)) {
        set_theme_mod('sidebars_widgets', array('time' => time(), 'data' => $_sidebars_widgets));
    }
    $nav_menu_locations = get_theme_mod('nav_menu_locations');
    if (func_num_args() > 1) {
        $stylesheet = func_get_arg(1);
    }
    $old_theme = wp_get_theme();
    $new_theme = wp_get_theme($stylesheet);
    $template = $new_theme->get_template();
    update_option('template', $template);
    update_option('stylesheet', $stylesheet);
    if (count($wp_theme_directories) > 1) {
        update_option('template_root', get_raw_theme_root($template, true));
        update_option('stylesheet_root', get_raw_theme_root($stylesheet, true));
    } else {
        delete_option('template_root');
        delete_option('stylesheet_root');
    }
    $new_name = $new_theme->get('Name');
    update_option('current_theme', $new_name);
    // Migrate from the old mods_{name} option to theme_mods_{slug}.
    if (is_admin() && false === get_option('theme_mods_' . $stylesheet)) {
        $default_theme_mods = (array) get_option('mods_' . $new_name);
        if (!empty($nav_menu_locations) && empty($default_theme_mods['nav_menu_locations'])) {
            $default_theme_mods['nav_menu_locations'] = $nav_menu_locations;
        }
        add_option("theme_mods_{$stylesheet}", $default_theme_mods);
    } else {
        /*
         * Since retrieve_widgets() is called when initializing a theme in the Customizer,
         * we need to to remove the theme mods to avoid overwriting changes made via
         * the Customizer when accessing wp-admin/widgets.php.
         */
        if ('wp_ajax_customize_save' === current_action()) {
            remove_theme_mod('sidebars_widgets');
        }
        if (!empty($nav_menu_locations)) {
            $nav_mods = get_theme_mod('nav_menu_locations');
            if (empty($nav_mods)) {
                set_theme_mod('nav_menu_locations', $nav_menu_locations);
            }
        }
    }
    update_option('theme_switched', $old_theme->get_stylesheet());
    /**
     * Fires after the theme is switched.
     *
     * @since 1.5.0
     *
     * @param string   $new_name  Name of the new theme.
     * @param WP_Theme $new_theme WP_Theme instance of the new theme.
     */
    do_action('switch_theme', $new_name, $new_theme);
}

/**
 * Runs on BuddyPress deactivation
 *
 * @since BuddyPress (1.6)
 *
 * @uses do_action() Calls 'bp_deactivation' hook
 */
function bp_deactivation()
{
    // Force refresh theme roots.
    delete_site_transient('theme_roots');
    // Switch to WordPress's default theme if current parent or child theme
    // depend on bp-default. This is to prevent white screens of doom.
    if (in_array('bp-default', array(get_template(), get_stylesheet()))) {
        switch_theme(WP_DEFAULT_THEME, WP_DEFAULT_THEME);
        update_option('template_root', get_raw_theme_root(WP_DEFAULT_THEME, true));
        update_option('stylesheet_root', get_raw_theme_root(WP_DEFAULT_THEME, true));
    }
    // Use as of (1.6)
    do_action('bp_deactivation');
    // @deprecated as of (1.6)
    do_action('bp_loader_deactivate');
}

/**
 * Switches the theme.
 *
 * Accepts one argument: $stylesheet of the theme. It also accepts an additional function signature
 * of two arguments: $template then $stylesheet. This is for backwards compatibility.
 *
 * @since 2.5.0
 *
 * @param string $stylesheet Stylesheet name
 */
function switch_theme($stylesheet)
{
    global $wp_theme_directories, $sidebars_widgets;
    if (is_array($sidebars_widgets)) {
        set_theme_mod('sidebars_widgets', array('time' => time(), 'data' => $sidebars_widgets));
    }
    $old_theme = wp_get_theme();
    $new_theme = wp_get_theme($stylesheet);
    if (func_num_args() > 1) {
        $template = $stylesheet;
        $stylesheet = func_get_arg(1);
    } else {
        $template = $new_theme->get_template();
    }
    update_option('template', $template);
    update_option('stylesheet', $stylesheet);
    if (count($wp_theme_directories) > 1) {
        update_option('template_root', get_raw_theme_root($template, true));
        update_option('stylesheet_root', get_raw_theme_root($stylesheet, true));
    } else {
        delete_option('template_root');
        delete_option('stylesheet_root');
    }
    $new_name = $new_theme->get('Name');
    update_option('current_theme', $new_name);
    if (is_admin() && false === get_option('theme_mods_' . $stylesheet)) {
        $default_theme_mods = (array) get_option('mods_' . $new_name);
        add_option("theme_mods_{$stylesheet}", $default_theme_mods);
    }
    update_option('theme_switched', $old_theme->get_stylesheet());
    /**
     * Fires after the theme is switched.
     *
     * @since 1.5.0
     *
     * @param string   $new_name  Name of the new theme.
     * @param WP_Theme $new_theme WP_Theme instance of the new theme.
     */
    do_action('switch_theme', $new_name, $new_theme);
}

/**
 * Switches current theme to new template and stylesheet names.
 *
 * @since 2.5.0
 * @uses do_action() Calls 'switch_theme' action on updated theme display name.
 *
 * @param string $template Template name
 * @param string $stylesheet Stylesheet name.
 */
function switch_theme($template, $stylesheet)
{
    global $wp_theme_directories;
    update_option('template', $template);
    update_option('stylesheet', $stylesheet);
    if (count($wp_theme_directories) > 1) {
        update_option('template_root', get_raw_theme_root($template, true));
        update_option('stylesheet_root', get_raw_theme_root($stylesheet, true));
    }
    delete_option('current_theme');
    $theme = get_current_theme();
    if (is_admin() && false === get_option("theme_mods_{$stylesheet}")) {
        $default_theme_mods = (array) get_option("mods_{$theme}");
        add_option("theme_mods_{$stylesheet}", $default_theme_mods);
    }
    do_action('switch_theme', $theme);
}

 /**
  * Check to see if the theme is already installed.
  *
  * @since 3.4
  * @access private
  *
  * @param object $theme - A WordPress.org Theme API object.
  * @return string Theme status.
  */
 private function _wp_get_theme($stylesheet = null, $theme_root = null)
 {
     global $wp_theme_directories;
     if (empty($stylesheet)) {
         $stylesheet = get_stylesheet();
     }
     if (empty($theme_root)) {
         $theme_root = get_raw_theme_root($stylesheet);
         if (false === $theme_root) {
             $theme_root = WP_CONTENT_DIR . '/themes';
         } elseif (!in_array($theme_root, (array) $wp_theme_directories)) {
             $theme_root = WP_CONTENT_DIR . $theme_root;
         }
     }
     if (class_exists('WP_Theme')) {
         return new WP_Theme($stylesheet, $theme_root);
     } else {
         WPRC_Loader::includeClass('class-wp-theme.php');
         return new WP_Theme($stylesheet, $theme_root);
     }
 }

function get_theme_root($stylesheet_or_template = false)
{
    global $wp_theme_directories;
    if ($stylesheet_or_template && ($theme_root = get_raw_theme_root($stylesheet_or_template))) {
        // Always prepend WP_CONTENT_DIR unless the root currently registered as a theme directory.
        // This gives relative theme roots the benefit of the doubt when things go haywire.
        if (!in_array($theme_root, (array) $wp_theme_directories)) {
            $theme_root = WP_CONTENT_DIR . $theme_root;
        }
    } else {
        $theme_root = WP_CONTENT_DIR . '/themes';
    }
    return apply_filters('theme_root', $theme_root);
}

 /**
  * Get the switched stylesheet (child) theme root path.
  * Used as a callback for 'pre_option_stylesheet_root' WP filter.
  *
  * @return string
  * @since 0.4
  */
 public function filter_stylesheet_root($stylesheet_root = '')
 {
     $stylesheet = $this->get_stylesheet();
     if (!empty($stylesheet)) {
         $stylesheet_root = get_raw_theme_root($stylesheet, true);
     }
     return $stylesheet_root;
 }

 /**
  * Retrieves the absolute URL to the current file.
  * Like a WordPress function `plugins_url`.
  *
  * @link   https://codex.wordpress.org/Function_Reference/plugins_url
  * @since  1.0.1
  * @param  string $file_path   Optional. Extra path appended to the end of the URL.
  * @param  string $module_path A full path to the core or module file.
  * @return string
  */
 public static function base_url($file_path = '', $module_path)
 {
     $module_path = wp_normalize_path($module_path);
     $module_dir = dirname($module_path);
     $plugin_dir = wp_normalize_path(WP_PLUGIN_DIR);
     $stylesheet = get_stylesheet();
     $theme_root = get_raw_theme_root($stylesheet);
     $theme_dir = "{$theme_root}/{$stylesheet}";
     if (0 === strpos($module_path, $plugin_dir)) {
         $url = plugin_dir_url($module_path);
     } else {
         if (false !== strpos($module_path, $theme_dir)) {
             $explode = explode($theme_dir, $module_dir);
             $url = get_stylesheet_directory_uri() . end($explode);
         } else {
             $site_url = site_url();
             $abs_path = wp_normalize_path(ABSPATH);
             $url = str_replace(untrailingslashit($abs_path), $site_url, $module_dir);
         }
     }
     if ($file_path && is_string($file_path)) {
         $url = trailingslashit($url);
         $url .= ltrim($file_path, '/');
     }
     return apply_filters('cherry_core_base_url', $url, $file_path, $module_path);
 }

 /**
  * Determine if instance already exists and Return Instance
  *
  * Attention: The method MUST be called from plugin core file at first to set correct path to plugin!
  *
  * @author peshkov@UD
  */
 public static function get_instance($args = array())
 {
     $class = get_called_class();
     //** We must be sure that final class contains static property $instance to prevent issues. */
     if (!property_exists($class, 'instance')) {
         exit("{$class} must have property \$instance");
     }
     $prop = new \ReflectionProperty($class, 'instance');
     if (!$prop->isStatic()) {
         exit("Property \$instance must be <b>static</b> for {$class}");
     }
     if (null === $class::$instance) {
         //** Get custom ( undefined ) Headers from style.css */
         global $wp_theme_directories;
         $stylesheet = get_stylesheet();
         $theme_root = get_raw_theme_root($stylesheet);
         if (false === $theme_root) {
             $theme_root = WP_CONTENT_DIR . '/themes';
         } elseif (!in_array($theme_root, (array) $wp_theme_directories)) {
             $theme_root = WP_CONTENT_DIR . $theme_root;
         }
         $data = get_file_data($theme_root . '/' . get_stylesheet() . '/style.css', array('uservoice_url' => 'UserVoice', 'support_url' => 'Support'));
         $t = wp_get_theme(get_template());
         $args = array_merge((array) $args, $data, array('name' => $t->get('Name'), 'version' => $t->get('Version'), 'template' => $t->get('Template'), 'domain' => $t->get('TextDomain'), 'is_child' => is_child_theme(), 'root_path' => trailingslashit(wp_normalize_path(get_template_directory())), 'root_url' => trailingslashit(wp_normalize_path(get_template_directory_uri())), 'schema_path' => trailingslashit(wp_normalize_path(get_template_directory())) . 'composer.json', 'boot_file' => trailingslashit(wp_normalize_path(get_template_directory())) . 'style.css'));
         //echo "<pre>"; print_r( $args ); echo "</pre>"; die();
         $class::$instance = new $class($args);
     }
     return $class::$instance;
 }