What is the significance of the error message "Non-static method mod_supersized2Helper::getImages() cannot be called statically" in PHP?

The error message "Non-static method mod_supersized2Helper::getImages() cannot be called statically" indicates that a non-static method is being called as if it were a static method in PHP. To resolve this issue, you need to either make the method static or create an instance of the class and then call the method on that instance.

// Correct way to call a non-static method
$helper = new mod_supersized2Helper();
$images = $helper->getImages();