WP Web Scrapper is working great for me - I have the basics all working properly. I'm using it to display the first image from whatever URL I enter into a custom field when posting (huge time saver lol!). I've put the scraper code into my template pages using the PHP template tags, and everything works fine.
However, I now want to do something a little more advanced - I want to process the code returned by the scraper template tag to:
1) save the returned image to the Media Library
2) set that image as the post's Featured Image
I know that this should possible, as the WP-ematico plugin, a RSS auto posting plugin, has the ability to detect the first image in the RSS < item >, save it to the Library, and set it as the Featured Image. I can figure out which part of the WP-ematico code does that, and now I'm trying to see out how I might incorporate this into WP Web Scrapper.
After reading the manual, it seems to be I should use the callback parameter for this, and write a function in my functions.php to do steps 1 and 2 above. However, I'm confused as to how callback works. How exactly do I include it in my template tag (do I use my function's name?), and then how exactly do I get the raw scrapped data into my function? What PHP variables or arrays do I use to access it?
If someone could post a working example of the callback parameter and a function that accesses it, I could probably figure it out - just need a starting point! Help? :)