How to send email when my plugin is activated?
I’m creating and developing a new plugin for some of my private clients and I do want to see if my clients are sharing my plugin with other people (I asked them not to do that).
How can I do something in my plugin every time plugin is activated, his website sends an email from ‘email@example.com’ to one or more emails I want ‘firstname.lastname@example.org’ and ‘email@example.com’.
By the way, does this include if they update the plugin? Or I just would be able to see who activates only? And does it include the current activated plugin?