I’ve just finished upgrade WP 3.6 and related plugins. There are two plugins generate Error message
PHP Strict Standards: call_user_func_array() expects parameter 1 to be a valid callback, non-static method GoogleSitemapGeneratorLoader::Enable() should not be called statically in /wp-includes/plugin.php on line 406, referer: http://www.refmanual.com/wp-admin/plugin-editor.php?file=google-xml-sitemaps-v3-for-qtranslate%2Fsitemap-core.php&plugin=google-xml-sitemaps-v3-for-qtranslate%2Fsitemap-ui.php
PHP Strict Standards: Non-static method GoogleSitemapGeneratorLoader::GetBaseName() should not be called statically in /wp-content/plugins/google-xml-sitemaps-v3-for-qtranslate/sitemap.php on line 114, referer: http://www.refmanual.com/wp-admin/plugin-editor.php?file=google-xml-sitemaps-v3-for-qtranslate%2Fsitemap-core.php&plugin=google-xml-sitemaps-v3-for-qtranslate%2Fsitemap-ui.php
PHP Strict Standards: call_user_func_array() expects parameter 1 to be a valid callback, non-static method GoogleSitemapGeneratorLoader::CallHtmlShowHelpList() should not be called statically in /wp-includes/plugin.php on line 173, referer: http://www.refmanual.com/wp-admin/plugin-editor.php?file=google-xml-sitemaps-v3-for-qtranslate%2Fsitemap-core.php&plugin=google-xml-sitemaps-v3-for-qtranslate%2Fsitemap-ui.php
PHP Strict Standards: Declaration of W3_Cache_Memcached::delete() should be compatible with W3_Cache_Base::delete($key, $group = '') in /wp-content/plugins/w3-total-cache/lib/W3/Cache/Memcached.php on line 15, referer: http://www.refmanual.com/wp-admin/plugins.php
After investigation, there are two plugins “google-xml-sitemaps-v3-for-qtranslate” and “w3-total-cache” report error.
First, google-xml-sitemaps complain a non-static method called statically…hmmm. so, i make a quick dirty fix as following:-
sitemap-core.php: public static function Enable() {
sitemap.php: public static function Enable() {
sitemap.php: public static function AddMultisiteWarning() {
sitemap.php: public static function RegisterAdminPage() {
sitemap.php: public static function RegisterAdminIcon($hook) {
sitemap.php: public static function RegisterPluginLinks($links, $file) {
sitemap.php: public static function CallHtmlShowOptionsPage() {
sitemap.php: public static function CallCheckForAutoBuild($args) {
sitemap.php: public static function CallBuildNowRequest() {
sitemap.php: public static function CallBuildSitemap() {
sitemap.php: public static function CallCheckForManualBuild() {
sitemap.php: public static function CallShowPingResult() {
sitemap.php: public static function CallHtmlShowHelpList($filterVal,$screen) {
sitemap.php: public static function CallDoRobots() {
sitemap.php: public static function LoadPlugin() {
sitemap.php: public static function GetBaseName() {
sitemap.php: public static function GetPluginFile() {
sitemap.php: public static function GetVersion() {
Simply make those non-static method become static, and no more complain in this plugin now.
For w3-total-cache, it complain the ancestor class Delete() in Base.php has two arguments, but Memcache.php contain only ONE. And because I’m using memcached, so I apply another dirty fix as follow:-
##lib/W3/Cache/Base.php
/* function delete($key, $group = '') { */
function delete($key) {
Ancestor and descendant are compatible now.
Although both “fix” are quite dirty, but I’m sure it will help you to get through the problem before author provide new patch.
That fix for W3 Cache worked well for me. Thanks.