I have noticed that when a WordPress site puts a link to my site in a post it shows their website in the comments section of my site.
I’m wonder how could I make my PHP application do this? I mean when I link to a WordPress site in my application it will show up in the comments section on the site I linked to automatically. I’ve tried to search on Google how to do this but I can’t find anything.
1 Answer
The term you need to search for is “Pingbacks” (and maybe “Trackbacks”, but the former is better as it is less vulnerable to spam abuse).
It is an XML-RPC request. You can find the specification here.
Looking at github there seem to be some bare metal PHP implementations, but as I haven’t used any of them I am not going to link to them directly, but you can easily find them via Google.
Also be aware that you can only notify a site. If it cares about the notification as well as if and how the link is display is of course out of your control.
