You're going to kick yourself... I checked the return value of $feed->init()
and it was false
, so I took out the extra / before "community" in your url and it seems to work.
https://discussions.apple.com/community/feeds/search?q=mathtype&peopleEnabled=true&dateRange=all&rankBy=date
When you use the double / in your browser, it ignores it, but SimplePie does not.