function flush() { static $done = false; if ($done) { return false; } # can't flush if WP isn't loaded if (!function_exists('get_option')) { return false; } $done = true; global $wpdb; $this->flush = true; if (method_exists('static_cache', 'disable')) { static_cache::disable(); } # flush posts $posts = $wpdb->get_results("SELECT ID, post_title, post_name, post_date, post_type, post_status, post_author, post_parent FROM {$wpdb->posts} WHERE post_status IN ('publish', 'private') OR post_type = 'attachment'"); # force WP widgets to flush wp_cache_delete('widget_recent_posts', 'widget'); wp_cache_delete('recent_comments', 'widget'); wp_cache_delete('get_calendar', 'calendar'); wp_cache_delete('wp_get_archives', 'general'); wp_cache_delete('all_page_ids', 'posts'); wp_cache_delete('get_pages', 'posts'); $post_ids = array(); foreach ($posts as $post) { $post_ids[] = $post->ID; $this->delete($post->ID, 'posts'); $this->delete($post->ID, 'post_meta'); clean_object_term_cache($post->ID, 'post'); do_action('clean_post_cache', $post->ID); # fill a temporary bucket so as to handle permalinks $key = $this->key($post->ID, 'posts'); $this->cache[$key] = $post; if (class_exists('sem_cache') && $post->post_type == 'post') { sem_cache::do_flush_author($post->post_author); sem_cache::do_flush_date($post->post_date); } } unset($posts); if (class_exists('sem_cache')) { # flush get_permalink() intensive stuff before flushing terms foreach ($post_ids as $post_id) { sem_cache::do_flush_post($post_id); } # flush home sem_cache::do_flush_home(); } # flush terms $terms = $wpdb->get_results("SELECT term_id, taxonomy FROM {$wpdb->term_taxonomy} WHERE count > 0"); $taxonomies = array(); $term_ids = array(); if (class_exists('sem_cache')) { foreach ($terms as $term) { sem_cache::do_flush_term($term->term_id, $term->taxonomy); } } foreach ($terms as $term) { $taxonomies[] = $term->taxonomy; $term_ids[] = $term->term_id; $this->delete($term->term_id, $term->taxonomy); } $taxonomies = array_unique($taxonomies); foreach ($taxonomies as $taxonomy) { $this->delete('all_ids', $taxonomy); $this->delete('get', $taxonomy); delete_option("{$taxonomy}_children"); do_action('clean_term_cache', $term_ids, $taxonomy); } $this->delete('last_changed', 'terms'); unset($terms); # flush users $user_ids = $wpdb->get_col("SELECT ID FROM {$wpdb->users}"); foreach ($user_ids as $user_id) { $this->delete($user_id, 'users'); } unset($user_ids); # backup key transients $transients = array('update_core', 'update_plugins', 'update_themes', 'sem_memberships', 'sem_update_plugins', 'sem_update_themes'); $extra = array('feed_220431e2eb0959fa9c7fcb07c6e22632', 'feed_mod_220431e2eb0959fa9c7fcb07c6e22632'); foreach (array_merge($transients, $extra) as $var) { ${$var} = get_transient($var); } # flush options $options = $wpdb->get_col("SELECT option_name FROM {$wpdb->options}"); foreach ($options as $option) { if (!in_array($option, array_merge($transients, $extra))) { if (preg_match("/^_transient_/", $option)) { delete_option($option); } else { $this->delete($option, 'options'); } } } $this->delete('notoptions', 'options'); $this->delete('alloptions', 'options'); unset($options); # restore key transients foreach ($transients as $var) { if (${$var} !== false) { set_transient($var, ${$var}); } } if ($feed_220431e2eb0959fa9c7fcb07c6e22632 !== false) { $var = 'feed_220431e2eb0959fa9c7fcb07c6e22632'; set_transient($var, ${$var}, min(3600, cache_timeout)); $var = 'feed_mod_220431e2eb0959fa9c7fcb07c6e22632'; set_transient($var, time(), min(3600, cache_timeout)); } return true; }