1.0 link Rainbow Dash Network http://rainbowdash.net/ Bit Shift (bitshift) http://rainbowdash.net/bitshift http://rainbowdash.net/notice/1702726 @<span class="vcard"><a href="http://rainbowdash.net/user/6850" class="url" title="Minti!"><span class="fn nickname">minti</span></a></span> It's actually pretty simple; just check whether the &quot;retweeted_status&quot; field (in JSON, the name might differ somewhat if you're using the Atom version) is null/nil/None/not present (whichever is appropriate for PHP). If it's not, the notice is a repeat, and you can safely skip over parsing it.