关于php：如何限制我保存在数组中的XML feed的内容？

How to limit the content of XML feeds I save in an array?

有没有办法仍然利用所有的feed，而不是加载每个feed的25个post(或来获得每个feed的前10个post？

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$feeds = array('',''); //a looot of inputs

$entries = array();
foreach ($feeds as $feed) {

$xml = simplexml_load_file($feed);
$xml->registerXPathNamespace('f', 'http://www.w3.org/2005/Atom');

$entries = array_merge($entries, $xml->xpath('/f:feed/f:entry | /rss/channel//item'));

}