WordPress Development Stack Exchange is a question and answer site for WordPress developers and administrators. It only takes a minute to sign up.
Sign up to join this community
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.
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.
