Fix File

• /home/sportsfe.../public_h.../wp-conte.../plugins/themify-.../themify/cache

• File: class-themify-cache.php

• Content:

<?php

defined('ABSPATH') || exit;
if (!class_exists('TFCache',false)) {
    if (!class_exists('Themify_Filesystem',false) && defined('TF_CACHE_FW')) {
        require_once dirname(TF_CACHE_FW) . '/class-themify-filesystem.php';
    }

/**
     * Class to work with  post cache
     *
     * @package default
     */
    class TFCache {

const SEP = DIRECTORY_SEPARATOR;

private static $cache_dir = null;
        public static $stopCache = false;
        private static $error = false;

/**
         * Start Caching
         *
         * @param string $tag
         * @param integer $post_id
         * @param array $args
         * @param integer $time
         *
         * return boolean
         */
        public static function start_cache($tag, $post_id = false, array $args = array(), $time = false) {//backward compatibility for addons
            return true;
        }

public static function end_cache() {//backward compatibility for addons
        }

/**
         * remove cache after some updates
         */
        public static function remove_cache($item_id = 'blog', $type = false, $blog_id = false) {
            static $queue = array();
            if (isset($queue['all'])) {
                return true;
            }
            if ($item_id === 'all') {
                $queue['all'] = true;
                $dir = self::get_cache_main_dir();
                if (!Themify_Filesystem::is_dir($dir)) {
                    return true;
                }
                return Themify_Filesystem::delete($dir);
            }
            $cache_dir = self::get_cache_blog_dir($blog_id);
            if (!isset($queue['blog']) && Themify_Filesystem::is_dir($cache_dir)) {
                if ($item_id === 'blog') {
                    $queue['blog'] = true;
                    return Themify_Filesystem::delete($cache_dir);
                } else {
                    if ($type === false) {
                        $the_post = wp_is_post_revision($item_id);
                        if ($the_post) {
                            $item_id = $the_post;
                        }
                        $post = get_post($item_id);
                        if (empty($post)) {
                            return true;
                        }
                        $type = $post->post_type;
                        $post = null;
                    }
                    if (empty($type)) {
                        return self::remove_cache();
                    }
                    $k = $type . $item_id;
                    if (!isset($queue[$k])) {
                        $queue[$k] = true;
                        $find = array(' post-' . $item_id);
                        $item_id = (int) $item_id;
                        $find[] = get_post_type($item_id) === 'page' ? ' page-id-' . $item_id : ' postid-' . $item_id; //if there is any html associated with updated post  
                        if ($type === 'comment' || $type === 'term' || $type === 'category') {
                            $find[] = $type . '-' . $item_id;
                            if ($type !== 'comment') {
                                $find[] = $type === 'category' ? get_category_link($item_id) : get_term_link($item_id);
                                $temp = get_term($item_id);
                                $find[] = 'term-' . $temp->slug;
                                $temp = null;
                            }
                        }
                        @set_time_limit(0);
                        $type = $item_id = null;
                        if (!self::clear_recursive($cache_dir, $find)) {
                            return self::remove_cache();
                        }
                    }
                }
            }
            return true;
        }

private static function clear_recursive($cache_dir, array $find) {
            $dirHandle = opendir($cache_dir);
            if (empty($dirHandle)) {
                return false;
            }
            while ($f = readdir($dirHandle)) {
                if ($f !== '.' && $f !== '..') {
                    $item = rtrim($cache_dir, self::SEP) . self::SEP . $f;
                    if (Themify_Filesystem::is_dir($item)) {
                        self::clear_recursive($item, $find);
                    } elseif (strpos($item, '.html', 5) !== false && strpos($item, '.html.gz', 5) === false && Themify_Filesystem::is_file($item)) {
                        $content = file_get_contents($item, FALSE, NULL, 2000);
                        if (!empty($content)) {
                            foreach ($find as $v) {
                                if (strpos($content, $v, 10) !== false) {
                                    Themify_Filesystem::delete($item, 'f');
                                    Themify_Filesystem::delete($item . '.gz', 'f');
                                    break;
                                }
                            }
                        }
                        $content = null;
                    }
                }
            }
            closedir($dirHandle);
            $dirHandle = null;
            return true;
        }

/**
         * init hooks to update cache
         */
        public static function hooks() {
            add_action('save_post', array(__CLASS__, 'save'), 100, 3);
            add_action('deleted_post', array(__CLASS__, 'save'), 100, 1);
            add_action('comment_post', array(__CLASS__, 'comment_update'), 100, 2);
            add_action('deleted_comment', array(__CLASS__, 'comment_update'), 100, 2);
            add_action('wp_update_nav_menu', array(__CLASS__, 'menu_update'), 100);
            add_action('wp_update_nav_menu_item', array(__CLASS__, 'menu_update'), 100);
            add_action('activated_plugin', array(__CLASS__, 'plugin_active_deactive'), 100, 2);
            add_action('deactivated_plugin', array(__CLASS__, 'plugin_active_deactive'), 100, 2);
            add_action('admin_footer', array(__CLASS__, 'admin_check'));
            add_action('wp_ajax_themify_write_config', array(__CLASS__, 'ajax_write_wp_cache'));
            add_action('customize_save_after', array(__CLASS__, 'customizer'));
            add_action('switch_theme', array(__CLASS__, 'disable_cache'), 5);

add_action('edit_term', array(__CLASS__, 'edit_term'), 100, 3);
            add_action('delete_term_taxonomy', array(__CLASS__, 'edit_term'), 100, 1);

add_action('check_ajax_referer', array(__CLASS__, 'widget_update'), 100, 2); //for widgets order,there is no hook

$metas = array('post', 'comment', 'term', 'user');
            foreach ($metas as $m) {
                if ($m !== 'term' && $m !== 'user') {
                    add_action('added_' . $m . '_meta', array(__CLASS__, 'meta_update'), 100, 4);
                }
                add_action('updated_' . $m . '_meta', array(__CLASS__, 'meta_update'), 100, 4);
                add_action('deleted_' . $m . '_meta', array(__CLASS__, 'meta_update'), 100, 4);
            }
            if (is_user_logged_in()) {
                add_action('admin_bar_menu', array(__CLASS__, 'cache_menu'), 100);
                if (isset($_GET['tf-cache']) && ($_GET['tf-cache'] === '2' || $_GET['tf-cache'] === '4')) {
                    add_action('init', array(__CLASS__, 'check_clear'), 1);
                }
            }
            add_action('upgrader_process_complete', array(__CLASS__, 'themify_updated'), 10, 2);
        }

/**
         * comment update
         */
        public static function comment_update($comment_ID, $comment_approved) {
            $comment = get_comment($comment_ID);
            if (!empty($comment)) {
                self::remove_cache($comment->comment_post_ID, 'comment');
            }
        }

/**
         * plugin activatiion/deactivation
         */
        public static function plugin_active_deactive($plugin, $network_wide) {
            $type = $network_wide ? 'all' : 'blog';
            self::remove_cache($type);
        }

/**
         * menu update
         */
        public static function menu_update($_menu_id) {
            themify_clear_menu_cache();
            remove_action('wp_update_nav_menu', array(__CLASS__, 'menu_update'), 100);
            remove_action('wp_update_nav_menu_item', array(__CLASS__, 'menu_update'), 100);
            self::remove_cache();
        }

public static function customizer($manager) {
            if (!empty($manager)) {
                $post_id = $manager->changeset_post_id();
                if (!empty($post_id)) {
                    self::remove_cache($post_id);
                }
            }
        }

public static function edit_term($term, $tt_id = null, $taxonomy = null) {
            if (empty($taxonomy)) {
                $temp = get_term($term);
                $taxonomy = $temp->taxonomy;
                $temp = null;
            }
            $type = $taxonomy === 'category' ? 'category' : 'term';
            self::remove_cache($term, $type);
        }

/**
         * meta update
         */
        public static function meta_update($meta_id, $post_id, $meta_key, $meta_value) {
            if (!empty($post_id)) {
                $actions = explode('_', current_action());
                self::remove_cache($post_id, $actions[1]);
            }
        }

public static function widget_update($action, $result) {
            if ($result !== false && $action === 'save-sidebar-widgets') {
                self::remove_cache();
            }
        }

public static function save($post_id, $post = false, $update = true) {
            if ($update || current_action() === 'deleted_post') {
                self::remove_cache($post_id);
            } elseif (!is_object($post) || $post->post_status !== 'auto-draft') {
                self::remove_cache();
            }
        }

public static function get_current_url():string {
            if (empty($_SERVER['REQUEST_URI']) || empty($_SERVER['HTTP_HOST'])) {
                return '';
            }
            $protocol = is_ssl() ? 'https://' : 'http://';
            return $protocol . $_SERVER['HTTP_HOST'] . $_SERVER['REQUEST_URI'];
        }

/**
         * will be called in advanced-cache.php before wp full core load,a lot of functions from wp api and FW functions are't available in in this function be carefull!
         */
        public static function run() {
            if (self::$stopCache === true) {
                return;
            }
            if (!function_exists('wp_get_nocache_headers')) {
                add_action('init', array(__CLASS__, 'run'), 0);
                return;
            }
            self::$cache_dir = self::get_cache_main_dir();
            if (Themify_Filesystem::mkdir(self::$cache_dir)) {
                $isMulti = is_multisite();
                if ($isMulti !== false) {
                    self::$cache_dir = self::get_cache_blog_dir();
                }
                if ($isMulti === false || Themify_Filesystem::mkdir(self::$cache_dir, true)) {
                    if (defined('TF_CACHE_RULES') && TF_CACHE_RULES) {
                        $ignore = explode('|TF|', TF_CACHE_RULES);
                        if (!empty($ignore) && !empty($_SERVER['HTTP_HOST'])) {
                            $request = $_SERVER['REQUEST_URI'];
                            $server = is_ssl() ? 'https://' : 'http://';
                            $server .= $_SERVER['HTTP_HOST'];
                            $del = '~';
                            foreach ($ignore as $r) {
                                $r = str_replace($server, '', $r);
                                $p = $del . $r . $del;
                                if (preg_match($p, $request)) {
                                    self::$cache_dir = null;
                                    return;
                                }
                            }
                            $request = $server = $ignore = null;
                        }
                    }
                    $dir = null;
                    self::$cache_dir = self::get_current_cache('', true).'.html';
                    if (Themify_Filesystem::is_file(self::$cache_dir)) {
                        $ftime = filemtime(self::$cache_dir);
                        $expire = defined('TF_CACHE_TIME') && TF_CACHE_TIME ? (TF_CACHE_TIME * 60) : WEEK_IN_SECONDS;
                        $liveTime = $expire + $ftime;
                        if ($liveTime > time()) {
                            global $wp;
                            $headers = apply_filters('wp_headers', wp_get_nocache_headers(), $wp);

if (!isset($headers['Cache-Control'])) {
                                $headers['Content-Type'] = 'no-cache, must-revalidate, max-age=0';
                            }
                            if (!isset($headers['Content-Type'])) {
                                $headers['Content-Type'] = 'text/html;charset=UTF-8';
                            }
                            //  header('Content-Length: '.filesize(self::$cache_dir));//temprorary disable,because when cd of cloudfare is enabled it will return compress brottil size 
                            $headers['Last-Modified'] = gmdate('D, d M Y H:i:s', $ftime) . ' GMT';
                            $headers['Expires'] = gmdate('D, d M Y H:i:s', $liveTime) . 'GMT';
                            if (Themify_Filesystem::is_file(self::$cache_dir)) {//maybe another proccess has already removed it?
                                $type = false; //self::get_available_gzip();temprorary disable gzip caching,because bug of cloudfare
                                if ($type !== false && Themify_Filesystem::is_file(self::$cache_dir . '.gz')) {
                                    $type = key($type);
                                    if (isset($_SERVER['HTTP_ACCEPT_ENCODING']) && strpos($_SERVER['HTTP_ACCEPT_ENCODING'], $type) !== false) {
                                        self::$cache_dir .= '.gz';
                                        $headers['Content-Encoding'] = $type;
                                    }
                                }
                                foreach ($headers as $name => $field_value) {
                                    header("{$name}: {$field_value}");
                                }
                                do_action_ref_array('send_headers', array(&$wp));
                                readfile(self::$cache_dir);
                                die;
                            }
                        } else {
                            Themify_Filesystem::delete(self::$cache_dir, 'f');
                            Themify_Filesystem::delete(self::$cache_dir . '.gz', 'f');
                        }
                    }
                    add_action('template_redirect', array(__CLASS__, 'template_include'), -9999999);
                } else {
                    self::$cache_dir = null;
                }
            } else {
                self::$cache_dir = null;
            }
        }

public static function get_current_cache(string $request = '',bool $create_dir = false):string {
            if ($request === '') {
                $request = self::get_current_url();
            }
            return self::get_cache_folder($request, $create_dir) . md5($request);
        }

/**
         * Initiate cache, just before page renders on frontend
         *
         * Hooked to "template_redirect"[0]
         */
        public static function template_include() {
            if (!themify_is_dev_mode()) {
                self::cache_start();
            }
        }

private static function cache_start() {
            global $post;
            if (self::$stopCache === true || (isset($post, $post->post_password) && $post->post_password !== '') || is_user_logged_in() || is_admin() || self::$cache_dir === null || is_404() || is_search() || themify_is_ajax() || post_password_required() || is_trackback() || is_robots() || is_preview() || is_customize_preview() || themify_is_login_page() || (themify_is_woocommerce_active() && (is_checkout() || is_cart() || is_account_page()))) {
                return;
            }
            if (defined('TF_CACHE_IGNORE') && TF_CACHE_IGNORE) {
                $ignore = explode(',', trim(TF_CACHE_IGNORE));
                if (!empty($ignore)) {
                    foreach ($ignore as $f) {
                        if (($f === 'is_shop' && themify_is_shop()) || ($f !== 'is_shop' && is_callable($f) && call_user_func($f))) {
                            return;
                        }
                    }
                }
                $ignore = null;
            }
            if (false !== self::get_cache_plugins()) {
                self::disable_cache();
                return;
            }
            define('TF_CACHE', true);
            self::$error = true;
            ob_start(array(__CLASS__, 'getBuffer'));
            add_action('wp_footer', array(__CLASS__, 'body_end'), 9999999);
        }

public static function getBuffer(?string $html=''):string {
            if (!$html) {
                $html = ob_get_contents();
            }
            if (self::$error === false && !empty($html)) {
                $html = preg_replace(array(
                    '//s',
                    '/\>[^\S ]{2,}/s', // remove whitespaces after tags
                    '/[^\S ]{2,}\</s', // remove whitespaces before tags
                    '/([\t ])+/s', //shorten multiple whitespace sequences; keep new-line characters because they matter in JS!!!
                    '/\>[\r\n\t ]{2,}\</s', //remove empty lines (between HTML tags); cannot remove just any line-end characters because in inline JS they can matter!
                    ), array('', '>', '<', ' ', '><'), $html);
                if (self::$stopCache === false) {
                    $dir = rtrim(dirname(self::$cache_dir), self::SEP) . self::SEP;
                    if (Themify_Filesystem::mkdir($dir, true) && !is_file(self::$cache_dir)) {
                        //tmp file need because file_put_contents isn't atomic(another process can read not ready file),locking file(LOCK_EX) is slow and not work always,that is why we are using rename(it is atomic)
                        if (file_put_contents(self::$cache_dir . 'tmp', '' . $html) && Themify_Filesystem::rename(self::$cache_dir . 'tmp', self::$cache_dir) !== false) {
                            if (false && themify_get_server() !== 'litespeed' && themify_check('setting-cache_gzip', true)) {
                                $func = self::get_available_gzip();
                                if ($func !== false) {
                                    $func = current($func);
                                    $html = call_user_func($func['f'], $html, $func['l']);
                                    $func = null;
                                    if (!empty($html)) {
                                        file_put_contents(self::$cache_dir . '.gz', '' . $html, LOCK_EX);
                                    }
                                }
                            }
                        } else {
                            Themify_Filesystem::delete(self::$cache_dir . 'tmp', 'f');
                        }
                    }
                }
            }
            return $html;
        }

public static function body_end():void {
            add_action('shutdown', array(__CLASS__, 'cache_end'), 0);
        }

public static function cache_end():void {
            self::$error = false;
            ob_end_flush();
        }

public static function get_available_gzip() {
            if (function_exists('brotli_compress') && ((isset($_SERVER['HTTPS']) && $_SERVER['HTTPS'] === 'on') || (isset($_SERVER['SERVER_PORT']) && (int) $_SERVER['SERVER_PORT'] === 443))) {
                return array('br' => array('f' => 'brotli_compress', 'l' => 10));
            }
            if (function_exists('gzdeflate')) {
                return array('deflate' => array('f' => 'gzdeflate', 'l' => 8));
            }
            if (function_exists('gzcompress')) {
                return array('deflate' => array('f' => 'gzcompress', 'l' => 8));
            }
            if (function_exists('gzencode')) {
                return array('gzip' => array('f' => 'gzencode', 'l' => 8));
            }
            return false;
        }

public static function create_config(array $data) {
            $cache_dir = self::get_wp_content_dir();
            if (Themify_Filesystem::is_writable($cache_dir)) {
                if (!empty($data['setting-cache-html']) && false === self::get_cache_plugins()) {
                    $fw_dir = THEMIFY_DIR . self::SEP . 'cache' . self::SEP;
                    $fw_config = $fw_dir . 'config.php';
                    $cache_config = self::get_cache_config_file();
                    $msg = sprintf(__('Can`t copy %s to %s. Please check permission or do manually it.', 'themify'), $fw_config, $cache_config);
                    if (Themify_Filesystem::is_file($cache_config)) {
                        include_once $cache_config;
                    }
                    $rules = '';
                    if (!empty($data['setting-cache-rule'])) {
                        $rules = explode(PHP_EOL, $data['setting-cache-rule']);
                        foreach ($rules as $i => $r) {
                            $rules[$i] = trim(str_replace(array('"', "'"), '', $r));
                            if (empty($rules[$i])) {
                                unset($rules[$i]);
                            }
                        }
                        $rules = !empty($rules) ? implode('|TF|', $rules) : '';
                    }
                    $config = array(
                        '#TF_CACHE_FW#' => trailingslashit($fw_dir),
                        '#TF_CACHE_TIME#' => !empty($data['setting-cache-live']) ? ((int) $data['setting-cache-live']) : WEEK_IN_SECONDS,
                        '#TF_CACHE_RULES#' => $rules,
                        '#TF_CACHE_IGNORE#' => ''
                    );
                    $rules = null;
                    $ignores = array();
                    foreach ($data as $k => $v) {
                        if (strpos($k, 'setting-cache-ignore_') === 0 && !empty($v)) {
                            $ignores[] = $v;
                        }
                    }
                    if (!empty($ignores)) {
                        $config['#TF_CACHE_IGNORE#'] = implode(',', $ignores);
                    }
                    $ignores = $data = null;
                    $hasUpdate = (!defined('TF_CACHE_FW') || TF_CACHE_FW !== $config['#TF_CACHE_FW#']) || (!defined('TF_CACHE_RULES') || $config['#TF_CACHE_RULES#'] !== TF_CACHE_RULES) || (!defined('TF_CACHE_IGNORE') || $config['#TF_CACHE_IGNORE#'] !== TF_CACHE_IGNORE) || (!defined('TF_CACHE_TIME') || $config['#TF_CACHE_TIME#'] != TF_CACHE_TIME);
                    if ($hasUpdate === true) {
                        if (!copy($fw_config, $cache_config)) {
                            self::disable_cache();
                            return $msg;
                        }
                        $content = Themify_Filesystem::get_contents($cache_config);
                        if (empty($content)) {
                            self::disable_cache();
                            return $msg;
                        }
                        if (!file_put_contents($cache_config, str_replace(array_keys($config), $config, $content), LOCK_EX)) {
                            self::disable_cache();
                            return false;
                        }
                        $content = null;
                    }
                    $copy = true;
                    if (Themify_Filesystem::is_file($cache_dir . 'advanced-cache.php')) {
                        $content = Themify_Filesystem::get_contents($cache_dir . 'advanced-cache.php');
                        $copy = empty($content) || strpos($content, 'class-themify-cache.php', 10) === false;
                        if ($copy === false && md5($content) !== md5_file($fw_dir . 'advanced-cache.php')) {
                            $copy = true;
                        }
                    }
                    if ($copy === true && !copy($fw_dir . 'advanced-cache.php', $cache_dir . 'advanced-cache.php')) {
                        Themify_Filesystem::delete($cache_config, 'f');
                        self::disable_cache();
                        return sprintf(__('Can`t copy %s to %s. Please check permission or do manually it.', 'themify'), $fw_dir . 'advanced-cache.php', $cache_dir . 'advanced-cache.php');
                    }
                    return self::write_wp_config();
                } else {
                    self::disable_cache();
                    return __('Themify Cache can not be enabled due to another cache plugin is activated.', 'themify');
                }
            } else {
                self::disable_cache();
                return sprintf(__('Folder %s isn`t writable.Please check permission to allow write cache.', 'themify'), $cache_dir);
            }
        }

public static function get_wp_content_dir():string {
            return rtrim(WP_CONTENT_DIR, self::SEP) . self::SEP;
        }

public static function get_cache_main_dir():string {
            return self::get_wp_content_dir() . 'tf_cache' . self::SEP;
        }

public static function get_cache_blog_dir($blog_id = false):string {
            $dir = self::get_cache_main_dir();
            if (is_multisite()) {
                if ($blog_id === false) {
                    static $bid = null;
                    if ($bid === null) {
                        $bid = get_current_blog_id();
                    }
                    $dir .= $bid . self::SEP;
                } else {
                    $dir .= $blog_id . self::SEP;
                }
            }
            return $dir;
        }

public static function get_cache_folder(string $request,bool $create = false):string {
            $dir = explode('?', $request);
            $dir = $dir[0];
            if ($dir !== '/') {
                $dir = trim($dir, '/');
                //group the files in directory by the pre last slash(e.g /blog/slug return blog,2014/06/09/slug return 2014/06/09/)
                if (is_multisite()) {
                    $domain = apply_filters('site_url', get_option('siteurl'), '', null, null);
                } else {
                    $domain = parse_url($dir);
                    $domain = isset($domain['host']) ? $domain['host'] : '';
                }
                $scheme = is_ssl() ? 'https' : 'http';
                $domain = str_replace(array('https:', 'http:'), '', trim($domain));
                $domain = $scheme . '://' . trim(ltrim($domain, '//'));
                $domain = trim(strtr($dir, array($domain => '')), '/');
                if ($domain === '') {
                    $dir = '/';
                } elseif (strpos($domain, '/') !== false) {
                    $domain = explode('/', $domain);
                    array_pop($domain);
                    $dir = implode('/', $domain);
                } else {
                    $dir = $domain;
                }
                $domain = null;
            }
            $blog_dir = self::get_cache_blog_dir() . md5($dir);
            if ($create === true) {
                Themify_Filesystem::mkdir($blog_dir, true);
            }
            return $blog_dir . self::SEP;
        }

public static function admin_check() {
            if (false !== self::get_cache_plugins()) {
                self::disable_cache();
            }
        }

public static function disable_cache() {
            $cache_dir = self::get_wp_content_dir();
            $config_f = self::get_cache_config_file();
            Themify_Filesystem::delete($config_f, 'f');
            if (!is_multisite()) {
                $config_f = $cache_dir . 'advanced-cache.php';
                if (Themify_Filesystem::is_file($config_f)) {
                    $content = Themify_Filesystem::get_contents($config_f);
                    $remove = !empty($content) && strpos($content, 'class-themify-cache.php', 10) !== false;
                } else {
                    $remove = true;
                }
                if ($remove === true) {//only when advanced-cache.php belongs to us or file doesn't exist try to disable WP_CACHE
                    if (WP_CACHE) {
                        $wp_config = ABSPATH . 'wp-config.php';
                        if (Themify_Filesystem::is_writable($wp_config)) {
                            $content = Themify_Filesystem::get_contents($wp_config);
                            if (!empty($content)) {
                                $content = str_replace(array(self::get_replace_str(), "define('WP_CACHE',true);"), '', $content);
                                if (strpos($content, 'Themify Cache', 2) !== false) {//try again
                                    $content = preg_replace('/define/', self::get_replace_str() . PHP_EOL . PHP_EOL . 'define', $content, 1);
                                }
                                if (!file_put_contents($wp_config, $content, LOCK_EX)) {
                                    $remove = false;
                                }
                            }
                        } else {
                            $remove = false; //otherwise will give error file doesn't exist,it's safe to keep it
                        }
                    }
                    if ($remove === true) {
                        Themify_Filesystem::delete($config_f, 'f');
                    }
                }
            }
        }

private static function get_replace_str():string {
            $replace = '/* Themify Cache Start */' . PHP_EOL;
            $replace .= "define('WP_CACHE',true);";
            $replace .= PHP_EOL . '/* Themify Cache End */';
            return $replace;
        }

public static function ajax_write_wp_cache() {
            check_ajax_referer('tf_nonce', 'nonce');
            if ( ! current_user_can( 'manage_options' ) ) {
                die;
            }

if (!empty($_POST['data'])) {
                $data = themify_normalize_save_data($_POST['data']);
                $msg = self::create_config($data);
                if ($msg === true) {
                    die(json_encode(array('remove_after' => 1)));
                }
                die(json_encode(array('error' => $msg)));
            }
            die;
        }

public static function write_wp_config() {
            $cache_dir = self::get_wp_content_dir();
            if (!WP_CACHE) {
                $wp_config = ABSPATH . 'wp-config.php';
                if (Themify_Filesystem::is_writable($wp_config)) {
                    if (Themify_Filesystem::is_file(self::get_cache_config_file()) && Themify_Filesystem::is_file($cache_dir . 'advanced-cache.php')) {
                        $content = Themify_Filesystem::get_contents($wp_config);
                        $str = self::get_replace_str();
                        if (!empty($content) && strpos($content, $str, 3) === false) {
                            $content = preg_replace('/define/', $str . PHP_EOL . PHP_EOL . 'define', $content, 1);
                            if (file_put_contents($wp_config, $content, LOCK_EX)) {
                                return true;
                            }
                        }
                    }
                } else {
                    return sprintf(__('File %s is`t writable. Please add %s %s.', 'themify'), $wp_config, "define('WP_CACHE',true)", $wp_config);
                }
            } elseif (!Themify_Filesystem::is_file(self::get_cache_config_file())) {
                self::disable_cache();
                return false;
            }
            return true;
        }

public static function get_cache_config_file():string {
            $fname = 'site';
            if (is_multisite()) {
                $fname .= '-' . get_current_blog_id();
            }
            $fname .= '.php';
            $dir = self::get_wp_content_dir() . 'tf_cache_config';
            Themify_Filesystem::mkdir($dir, true,0755);
            return $dir . self::SEP . $fname;
        }

public static function cache_menu($wp_admin_bar) {
            if (!current_user_can('manage_options')) {
                return;
            }
            $link = remove_query_arg(['tf-cache','nonce'], self::get_current_url());
            $isDevmode = themify_is_dev_mode();
            $args = array(
                array(
                    'id' => 'tf_clear_cache',
                    'title' => __('Themify Cache', 'themify')
                )
            );

$hasCache = false;
            $nonce= wp_create_nonce('tf_cache');
            $cache_plugins = false !== self::get_cache_plugins();
            $hasCache = WP_CACHE && $cache_plugins === false && Themify_Filesystem::is_file(self::get_cache_config_file());
            if ($isDevmode === true) {
                $args[0]['id'] = 'tf_dev_mode';
                $args[0]['title'] = '<span class="tf_admin_bar_tooltip">' . __('Warning: Dev Mode is enabled (Themify cache, menu cache, concate cache and .gz are disabled). Only enable this for development purposes.', 'themify') . '</span>' . esc_html__('Dev Mode', 'themify');
                $args[0]['meta'] = array('class' => 'tf_admin_bar_alert');
                $args[] = array(
                    'id' => 'tf_disable_dev',
                    'parent' => $args[0]['id'],
                    'href' => add_query_arg(array('tf-cache' => 4,'nonce'=>$nonce), $link),
                    'title' => __('Disable Dev Mode', 'themify')
                );
            } else {
                if (isset($_GET['tf-cache'],$_GET['nonce']) && wp_verify_nonce($_GET['nonce'],'tf_cache')) {
                    $cache_type = (int) $_GET['tf-cache'];
                    if ($cache_type === 3) {
                        themify_clear_menu_cache();
                    } 
                    elseif ($cache_type === 1) {
                        add_filter('themify_concate_css', '__return_false');
                        if ($hasCache === true) {
                            $link = self::get_current_cache($link);
                            Themify_Filesystem::delete($link . '_safari.html', 'f');
                            Themify_Filesystem::delete($link . '_safari.html.gz', 'f');
                            $link .= '.html';
                            Themify_Filesystem::delete($link, 'f');
                            $link .= '.gz';
                            Themify_Filesystem::delete($link, 'f');
                        }
                        themify_clear_menu_cache();
                    }
                }
                $args[] = array(
                    'id' => 'tf_clear_html',
                    'parent' => 'tf_clear_cache',
                    'href' => add_query_arg(array('tf-cache' => 1,'nonce'=>$nonce), $link),
                    'title' => $hasCache === true ? __('Purge Page Cache', 'themify') : __('Regenerate Page CSS', 'themify')
                );
                $args[] = array(
                    'id' => 'tf_clear_all',
                    'parent' => 'tf_clear_cache',
                    'href' => add_query_arg(array('tf-cache' => 2,'nonce'=>$nonce), $link),
                    'title' => $hasCache === true ? __('Purge All Cache', 'themify') : __('Regenerate All CSS', 'themify')
                );
                if ($hasCache === false && $cache_plugins === false && !themify_check('setting-cache-menu', true)) {
                    $args[] = array(
                        'id' => 'tf_clear_menu',
                        'parent' => 'tf_clear_cache',
                        'href' => add_query_arg(array('tf-cache' => 3,'nonce'=>$nonce), $link),
                        'title' => __('Clear Menu Cache', 'themify')
                    );
                }
            }
            $cache_plugins = null;
            foreach ($args as $arg) {
                $wp_admin_bar->add_node($arg);
            }
        }

public static function check_clear() {
            if (isset($_GET['nonce']) && wp_verify_nonce($_GET['nonce'],'tf_cache') && current_user_can('manage_options')) {
                if ($_GET['tf-cache'] === '2') {
                    Themify_Enqueue_Assets::clearConcateCss();
                    themify_clear_menu_cache();
                } else {
                    $tmp = themify_get_data();
                    unset($tmp['setting-dev-mode']);
                    themify_set_data($tmp);
                }
                $link = remove_query_arg(['tf-cache','nonce'], self::get_current_url());
                if (wp_redirect($link)) {
                    exit;
                }
            }
        }

public static function clear_3rd_plugins_cache($post_id = 0) {
            $cache_plugins = self::get_cache_plugins('others');
            if (false === $cache_plugins) {
                return;
            }
            $post_id = (int) $post_id <= 0 ? 0 : (int) $post_id;
            // Sometimes we need to clear all caches ex. when Pro template or Layout Part is edited
            if ($post_id > 0) {
                $type = get_post_type($post_id);
                $post_id = 'post' === $type || 'page' === $type ? $post_id : 0;
            }
            foreach ($cache_plugins as $k => $v) {
                switch ($k) {
                    case 'SC':
                        if ($post_id > 0) {
                            wp_cache_post_change($post_id);
                        } else {
                            wp_cache_clear_cache();
                        }
                        break;
                    case 'W3TC':
                        if ($post_id > 0) {
                            w3tc_flush_post($post_id);
                        } else {
                            w3tc_flush_all();
                        }
                        break;
                    case 'WPFC':
                        if ($post_id > 0) {
                            wpfc_clear_post_cache_by_id($post_id);
                        } else {
                            wpfc_clear_all_cache(true);
                        }
                        break;
                    case 'AO':
                        if (0 === $post_id) {
                            autoptimizeCache::clearall();
                        }
                        break;
                    case 'WPO':
                        if ($post_id > 0) {
                            WPO_Page_Cache::delete_single_post_cache($post_id);
                        } else {
                            WP_Optimize()->get_page_cache()->purge();
                        }
                        break;
                    case 'LSCWP':
                        if ($post_id > 0) {
                            do_action('litespeed_purge_post', $post_id);
                        } else {
                            do_action('litespeed_purge_all');
                        }
                        break;
                    case 'WPHB':
                        if ($post_id > 0) {
                            do_action('wphb_clear_page_cache', $post_id);
                        } else {
                            do_action('wphb_clear_page_cache');
                        }
                        break;
                    case 'CLFL':
                        // Cloudflare use this hook to purge the cache
                        if (0 === $post_id) {
                            do_action('autoptimize_action_cachepurged');
                        }
                        break;
                    case 'SGO':
                        $post_id = $post_id > 0 ? get_permalink($post_id) : false;
                        if ($post_id !== false) {
                            sg_cachepress_purge_cache($post_id);
                        } else {
                            sg_cachepress_purge_cache();
                        }
                        break;
                    case 'Breeze':
                        if ($post_id === 0) {
                            do_action('breeze_clear_all_cache');
                        }
                        break;
                    case 'ROCKET':
                        if ($post_id > 0) {
                            rocket_clean_post($post_id);
                        } else {
                            rocket_clean_domain();
                        }
                        break;
                    case 'Comet':
                        if ($post_id > 0) {
                            comet_cache::clearPost($post_id);
                        } else {
                            comet_cache::clear();
                        }
                        break;
                    case 'CE':
                        if ($post_id > 0) {
                            do_action('cache_enabler_clear_page_cache_by_post', $post_id);
                        } else {
                            do_action('cache_enabler_clear_site_cache');
                        }
                        break;
                    case 'WpeC':
                        if (method_exists('WpeCommon', 'purge_memcached')) {
                            WpeCommon::purge_memcached($post_id);
                        }
                        if (method_exists('WpeCommon', 'clear_maxcdn_cache')) {
                            WpeCommon::clear_maxcdn_cache($post_id);
                        }
                        if (method_exists('WpeCommon', 'purge_varnish_cache')) {
                            WpeCommon::purge_varnish_cache($post_id);
                        }
                        break;
                    case 'Cachify':
                        if ($post_id > 0) {
                            do_action('cachify_remove_post_cache', $post_id);
                        } else {
                            do_action('cachify_flush_cache');
                        }
                        break;
                    case 'RP':
                        if ($post_id > 0) {
                            rapidcache_clear_post_cache($post_id);
                        } else {
                            rapidcache_clear_cache();
                        }
                        break;
                    case 'SWPC':
                        if ($post_id > 0) {
                            Swift_Performance_Cache::clear_post_cache($post_id);
                        } else {
                            Swift_Performance_Cache::clear_all_cache();
                        }
                        break;
                    case 'NGXC':
                        if ($post_id === 0) {
                            $nginx_cache = new NginxCache();
                            $nginx_cache->purge_zone_once();
                        }
                        break;
                }
            }
        }

public static function get_cache_plugins($slug = 'others') {
            static $items = null;
            if ($items === null) {
                $items = array();
                //W3 Total Cache plugin
                if (function_exists('w3tc_flush_post') && function_exists('w3tc_flush_all')) {
                    $items['W3TC'] = true;
                }
                //WP Super Cache
                if (function_exists('wp_cache_clear_cache') && function_exists('wp_cache_post_change')) {
                    $items['SC'] = true;
                }
                //Fastest Cache
                if (function_exists('wpfc_clear_post_cache_by_id') && function_exists('wpfc_clear_all_cache')) {
                    $items['WPFC'] = true;
                }
                //WP Rocket
                if (function_exists('rocket_clean_domain') && function_exists('rocket_clean_post')) {
                    $items['ROCKET'] = true;
                }
                //wp-cloudflare-page-cache
                if (class_exists('SW_CLOUDFLARE_PAGECACHE',false)) {
                    $items['SWCFPC'] = true;
                }
                //WP-Optimiz
                if (method_exists('WP_Optimize', 'get_page_cache') && WP_Optimize()->get_page_cache()->is_enabled()) {
                    $items['WPO'] = true;
                }
                //LiteSpeed Cache
                if (defined('LSCWP_CONTENT_DIR')) {
                    $items['LSCWP'] = true;
                }

//Comet Cache
                if (method_exists('comet_cache', 'clear') && method_exists('comet_cache', 'clearPost')) {
                    $items['Comet'] = true;
                }
                //Cache Enabler
                if (class_exists('Cache_Enabler',false)) {
                    $items['CE'] = true;
                }
                //Breeze
                if (class_exists('Breeze_Admin',false)) {
                    $items['Breeze'] = true;
                }
                //Hummingbird
                if (defined('WPHB_DIR_PATH')) {
                    $items['WPHB'] = true;
                }
                //WP Speed of Light
                if (defined('WPSOL_PLUGIN_URL')) {
                    $items['WPSOL'] = true;
                }
                //Auto optimize
                if (method_exists('autoptimizeCache', 'clearall')) {
                    $items['AO'] = true;
                }
                //Cloudflare
                if (defined('CLOUDFLARE_PLUGIN_DIR')) {
                    $items['CLFL'] = true;
                }
                //SG optimizer
                if (function_exists('sg_cachepress_purge_cache')) {
                    $items['SGO'] = true;
                }
                //Cachify
                if (defined('CACHIFY_FILE')) {
                    $items['Cachify'] = true;
                }
                //WPEngine Cache
                if (class_exists('WpeCommon',false)) {
                    $items['WpeC'] = true;
                }
                //Rapid Cache
                if (function_exists('rapidcache_clear_post_cache') && function_exists('rapidcache_clear_cache')) {
                    $items['RP'] = true;
                }

//Swift Cache
                if (class_exists('Swift_Performance_Cache',false)) {
                    $items['SWPC'] = true;
                }
                //NginxCache Cache
                if (class_exists('NginxCache',false)) {
                    $items['NGXC'] = true;
                }
            }
            if ($slug === 'others') {
                unset($items['themify']);
                return empty($items) ? false : $items;
            }
            //themify cache
            if (defined('TF_CACHE') && TF_CACHE) {
                $items['themify'] = true;
            }
            if ($slug === 'any') {
                return !empty($items);
            }
            if ($slug === 'all') {
                return $items;
            }
            return isset($items[$slug]);
        }

public static function themify_updated($upgrader_object, $options) {
            if ($options['action'] === 'update') {
                if ($options['type'] === 'plugin' && defined('THEMIFY_BUILDER_SLUG')) {
                    if (isset($options['plugins'])) {
                        foreach ($options['plugins'] as $each_plugin) {
                            if ($each_plugin === THEMIFY_BUILDER_SLUG) {
                                self::clear_3rd_plugins_cache();
                                break;
                            }
                        }
                    }
                } elseif ($options['type'] === 'theme' && function_exists('themify_is_themify_theme') && themify_is_themify_theme()) {
                    self::clear_3rd_plugins_cache();
                }
            }
        }
    }

add_action('after_setup_theme', array('TFCache', 'hooks'));
}

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