PHP RSS解析器（Magpie）深层元素

Im使用喜鹊RSS解析器（）

以下是vardump：

array(11) {
  ["dc"]=>
  array(1) {
    ["creator"]=>
    string(9) "Microsoft"
  }
  ["title"]=>
  string(16) "The Type We Want"
  ["description"]=>
  string(245) "After a slow evolution, the landscape for custom type on the web has been changing quickly. This session will cover the history of embedding fonts, diving into the options available to us today and finally taking a look at the hurdles before us."
  ["link"]=>
  string(44) "http://live.visitmix.com/MIX10/Sessions/DS15"
  ["guid"]=>
  string(44) "http://live.visitmix.com/MIX10/Sessions/DS15"
  ["pubdate"]=>
  string(29) "Tue, 02 Mar 2010 09:51:34 GMT"
  ["category"]=>
  string(2) "UX"
  ["evnet"]=>
  array(6) {
    ["starttime"]=>
    string(29) "Wed, 17 Mar 2010 09:00:00 GMT"
    ["endtime"]=>
    string(29) "Wed, 17 Mar 2010 10:00:00 GMT"
    ["location"]=>
    string(9) "Lagoon GH"
    ["speaker"]=>
    string(17) "
                "
    ["speaker_displayname"]=>
    string(14) "Jonathan Snook"
    ["speaker_moreinfo"]=>
    string(48) "http://live.visitmix.com/Speakers/Jonathan-Snook"
  }
  ["speaker"]=>
  string(30) "

            "
  ["summary"]=>
  string(245) "After a slow evolution, the landscape for custom type on the web has been changing quickly. This session will cover the history of embedding fonts, diving into the options available to us today and finally taking a look at the hurdles before us."
  ["date_timestamp"]=>
  int(1267523494)
}

我想回应这些元素：

["evnet"]=>
      array(6) {
        ["starttime"]=>
        string(29) "Wed, 17 Mar 2010 09:00:00 GMT"
        ["endtime"]=>
        string(29) "Wed, 17 Mar 2010 10:00:00 GMT"
        ["location"]=>
        string(9) "Lagoon GH"
        ["speaker"]=>
        string(17) "
                    "
        ["speaker_displayname"]=>
        string(14) "Jonathan Snook"
        ["speaker_moreinfo"]=>
        string(48) "http://live.visitmix.com/Speakers/Jonathan-Snook"
      }

我已经：

<?php require_once('magpie/rss_fetch.inc');
$rss = fetch_rss('http://live.visitmix.com/Sessions/RSS');

foreach ($rss->items as $item) {
        $href = $item['link'];
        $title = $item['title'];
        $desc = $item['description'];
        $cat = $item['category'];
        echo '<p><a href="$href">'.$title.'</a><br>';
        if($desc) echo $desc;

}



?>

有人能帮我回显数组中的项目吗

---

例如，

$cat=$item['starttime']不起作用。
$cat=$item['evnet']['starttime']
 详细说明，我看不出问题所在。我不知道如何获取“evnet”元素。
foreach( $rss->items as $item ) {
   // ...
   $event = $item['evnet'];
   $start = $event['starttime'];
   // ...
}