If you have a wordpress plugin, more than likely you are using add_action and/or add_filter. No problem, until you get this error: Warning: call_user_func_array() expects parameter 1 to be a valid callback, cannot access self:: when no class scope is active in /home/wpcom/public_html/wp-includes/plugin.php on line ……… One of the annoyances of wordpress is that tracking…
Read more: Static classes on WordPress plugins