Php XML域XPath搜索

我需要返回cat 1+其他项的最后一项

以下XPath应选择文档中每个类别的最后一项

/root/channel/item[not(category = following::category)]

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你说“我需要返回最后一类物品+其他物品”是什么意思？获取最后一类：我有{cat1，cat1（last），cat2，cat3}需要返回{cat1（last），cat2，cat3}不客气。如果这解决了您的问题，如果您可以单击旁边的复选标记图标，将答案勾选为已接受，我将不胜感激。还向其他人表明，这一问题已经得到解决。谢谢

<?php
        $DOMDocument = new DOMDocument( '1.0', 'utf-8' );
        $DOMDocument->preserveWhiteSpace = false;
        $DOMDocument->load( 'xml.xml' );
        $DOMXPath = new DOMXPath( $DOMDocument );
        foreach( $DOMXPath->query('.//channel/item/category[last()]/parent::node()') as $Nodes ){
                 foreach( $Nodes->childNodes as $Node ){
                          $RSS[ $Node->nodeName ] = $Node->nodeValue;
                 }
                 $RSSContents[] = $RSS;
        }
        echo '<pre>';
        print_r( $RSSContents );

Array
(
    [0] => Array
        (
            [category] => Cat1
        )

    [1] => Array
        (
            [category] => Cat1
        )

    [2] => Array
        (
            [category] => Cat2
        )

    [3] => Array
        (
            [category] => Cat3
        )

)

/root/channel/item[not(category = following::category)]