Please help! I need to record member(user) name on button-pressed event

[DavidoffNY]

Hi,

 

I am very much a newbie with PHP. I am trying to log member names when they download media on WordPress site. From what I gathered I could use WordPress function:

$current_user = wp_get_current_user();

But I have no idea how to implement it on button-pressed event and record it into log file.

Can anyone help?

 

Thanks