load_session(); $location = array(); $location['country'] = $customer->get_billing_country(); $location['state'] = $customer->get_billing_state(); $location['postcode'] = $customer->get_billing_postcode(); $location['city'] = $customer->get_billing_city(); return substr( md5( implode( '', $location ) ), 0, 12 ); } /** * When using geolocation via ajax, to bust cache, redirect if the location hash does not equal the querystring. * * This prevents caching of the wrong data for this request. */ public static function geolocation_ajax_redirect() { if ( 'geolocation_ajax' === get_option( 'woocommerce_default_customer_address' ) && ! is_checkout() && ! is_cart() && ! is_account_page() && ! is_ajax() && empty( $_POST ) ) { $location_hash = self::geolocation_ajax_get_location_hash(); $current_hash = isset( $_GET['v'] ) ? wc_clean( $_GET['v'] ) : ''; if ( empty( $current_hash ) || $current_hash !== $location_hash ) { global $wp; $redirect_url = trailingslashit( home_url( $wp->request ) ); if ( ! empty( $_SERVER['QUERY_STRING'] ) ) { $redirect_url = add_query_arg( $_SERVER['QUERY_STRING'], '', $redirect_url ); } if ( ! get_option( 'permalink_structure' ) ) { $redirect_url = add_query_arg( $wp->query_string, '', $redirect_url ); } $redirect_url = add_query_arg( 'v', $location_hash, remove_query_arg( 'v', $redirect_url ) ); wp_safe_redirect( esc_url_raw( $redirect_url ), 307 ); exit; } } } /** * Get transient version. * * When using transients with unpredictable names, e.g. those containing an md5. * hash in the name, we need a way to invalidate them all at once. * * When using default WP transients we're able to do this with a DB query to. * delete transients manually. * * With external cache however, this isn't possible. Instead, this function is used. * to append a unique string (based on time()) to each transient. When transients. * are invalidated, the transient version will increment and data will be regenerated. * * Raised in issue https://github.com/woocommerce/woocommerce/issues/5777. * Adapted from ideas in http://tollmanz.com/invalidation-schemes/. * * @param string $group Name for the group of transients we need to invalidate * @param boolean $refresh true to force a new version * @return string transient version based on time(), 10 digits */ public static function get_transient_version( $group, $refresh = false ) { $transient_name = $group . '-transient-version'; $transient_value = get_transient( $transient_name ); if ( false === $transient_value || true === $refresh ) { self::delete_version_transients( $transient_value ); set_transient( $transient_name, $transient_value = time() ); } return $transient_value; } /** * When the transient version increases, this is used to remove all past transients to avoid filling the DB. * * Note; this only works on transients appended with the transient version, and when object caching is not being used. * * @since 2.3.10 */ public static function delete_version_transients( $version = '' ) { if ( ! wp_using_ext_object_cache() && ! empty( $version ) ) { global $wpdb; $limit = apply_filters( 'woocommerce_delete_version_transients_limit', 1000 ); $affected = $wpdb->query( $wpdb->prepare( "DELETE FROM {$wpdb->options} WHERE option_name LIKE %s ORDER BY option_id LIMIT %d;", "\_transient\_%" . $version, $limit ) ); // If affected rows is equal to limit, there are more rows to delete. Delete in 10 secs. if ( $affected === $limit ) { wp_schedule_single_event( time() + 10, 'delete_version_transients', array( $version ) ); } } } /** * Get the page name/id for a WC page. * @param string $wc_page * @return array */ private static function get_page_uris( $wc_page ) { $wc_page_uris = array(); if ( ( $page_id = wc_get_page_id( $wc_page ) ) && $page_id > 0 && ( $page = get_post( $page_id ) ) ) { $wc_page_uris[] = 'p=' . $page_id; $wc_page_uris[] = '/' . $page->post_name . '/'; } return $wc_page_uris; } /** * Prevent caching on dynamic pages. * @access public */ public static function prevent_caching() { if ( false === ( $wc_page_uris = get_transient( 'woocommerce_cache_excluded_uris' ) ) ) { $wc_page_uris = array_filter( array_merge( self::get_page_uris( 'cart' ), self::get_page_uris( 'checkout' ), self::get_page_uris( 'myaccount' ) ) ); set_transient( 'woocommerce_cache_excluded_uris', $wc_page_uris ); } if ( isset( $_GET['download_file'] ) ) { self::nocache(); } elseif ( is_array( $wc_page_uris ) ) { foreach ( $wc_page_uris as $uri ) { if ( stristr( $_SERVER['REQUEST_URI'], $uri ) ) { self::nocache(); break; } } } } /** * Set nocache constants and headers. * @access private */ private static function nocache() { if ( ! defined( 'DONOTCACHEPAGE' ) ) { define( "DONOTCACHEPAGE", true ); } if ( ! defined( 'DONOTCACHEOBJECT' ) ) { define( "DONOTCACHEOBJECT", true ); } if ( ! defined( 'DONOTCACHEDB' ) ) { define( "DONOTCACHEDB", true ); } nocache_headers(); } /** * notices function. */ public static function notices() { if ( ! function_exists( 'w3tc_pgcache_flush' ) || ! function_exists( 'w3_instance' ) ) { return; } $config = w3_instance( 'W3_Config' ); $enabled = $config->get_integer( 'dbcache.enabled' ); $settings = array_map( 'trim', $config->get_array( 'dbcache.reject.sql' ) ); if ( $enabled && ! in_array( '_wc_session_', $settings ) ) { ?>

database caching to work with WooCommerce you must add %1$s to the "Ignored Query Strings" option in W3 Total Cache settings.', 'woocommerce' ), '_wc_session_', admin_url( 'admin.php?page=w3tc_dbcache' ) ); ?>