用simpleXML获取php.net的RSS

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simpleXML是php5的新特性。RSS是如今比较流行的哈。这里提供一个简单的演示，来获取php.net的RSS。
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代码:

  <br>$cache="phpnews.xml";  <br>$rssurl="http://www.php.net/news.rss";  <br>header("content-type:text/html;charset=utf-8");  <br>if( file_exists("$cache") )  <br><br>{  <br><br>$m=filemtime("$cache");  <br><br>$n=time();  <br><br>if($n-$m>10800)  <br>{  <br>$rss=simplexml_load_file("$rssurl");  <br>$rss->asXML("$cache");  <br><br>}  <br>else  <br>$rss=simplexml_load_file("$cache");  <br>  <br>}  <br><br>else  <br>{  <br>$rss=simplexml_load_file("$rssurl");  <br>$rss->asXML("$cache");  <br><br>}  <br><br>  <br>foreach($rss->item as $item)  <br><br>  <br>print "<a href="%24item->link" target="_blank"> $item->title </a><br>n";  <br><br>  <br><br>?>