I currently use piklist to build my own project.
Now I try to make submenu CPT in admin page which is Import all value for CSV field contain data for each fields in CPT.
What I have done so far are make submenu (Success) and create upload form (Success).
My field-upload.php store in /parts/settings
My submenu code store in my CPT function file.
but I little bit confused because don’t know where I put my code to process csv file insert to custom field in CPT. Is there any documentation or Piklist have feature to this. I am sorry for my question.