The FileUpload backend form widget has onUpload() method that I need to access in my backend to make some changes to it instead of modifying the core file directly.

How do I access the onUpload() method of the form widget in my plugin?

Last updated 4 years ago

You should be able to override this method in the Controller class using that form.

Could please give me a quick example? I'm not sure how to proceed with it.

What I suggested above won't work, the handler is prefixed with the Widget alias... one way that'll work is if you create a new FormWidget that extends the core FileUpload widget and override its onUpload() method. Then register this formwidget in your plugin and use the new name in your forms.