Use a before plugin to modify function parameters in Magento

Let’s take a look at this LogPostDetailView observer class from the Macademy_Blog module, and let’s say we wanted to manually add a parameter to the request object with some backend code. Since the request parameter is passed as an extra data parameter to the $observer argument, we can easily change the value of this $observer variable with a before plugin.

All plugins will go within a Plugin directory, so create a directory within your module named Plugin. Just like observers, name plugins after what they do. Since we’d like to add data to the request object of the post detail...