From time to time a user comes to me and says “I see some PHP notices and warnings on my page”. Most of the time these are nothing to worry about (though the plugin/theme developer should know about these so that they may fix them in a future release). PHP warnings and notices are nothing to worry about on a production site most of the time. Some of these can even be generated because the developer has to keep compatibility with older versions of WordPress as well as older PHP versions. The solution: