I’m trying to set up a webhook flow to subscribe to Stream Up/Down notifications, but on my handler page I can’t return the challenge because I can’t get the challenge from the post because $_POST[‘hub.challenge’] is blank. It has to be the period because if I send a post request from a page on my site with a “hub.challenge” variable I can’t grab it, but if I just send the variable as “challenge” I can get the response to work fine.
I’m not super experienced with PHP so am I just doing something obvious wrong?
Thanks for your help.