Php 删除同名的XML子项

我有一个包含以下内容的大型XML：

<?xml version="1.0" encoding="UTF-8"?>
<valasz xmlns="" verzio="1.0">
<arak>
<ar>
<cikkid>439902</cikkid>
<cikkszam>DVDV-16Z10</cikkszam>
<listaar>1225,0000000</listaar>
<ar>1157,6200000</ar>
<akcios_ar>1157,6200000</akcios_ar>
<devizanem>HUF</devizanem>
</ar>
<ar>
..
<ar>1157,6200000</ar>
...
</ar>
</arak>

    $node = readfile($arlista[0]);
    $nodes = simplexml_load_string($node);
    $arnode = $nodes->xpath("/valasz/arak/ar/ar");
        foreach ($arnode as &$ar){
            $nodes->removeChild($ar);
        }
    echo $nodes;

    [arak] => SimpleXMLElement Object
        (
            [ar] => Array
                (
                    [0] => SimpleXMLElement Object
                        (
                            [cikkid] => 439902
                            [cikkszam] => DVDV-16Z10
                            [listaar] => 1225,0000000
                            [akcios_ar] => 1157,6200000
                            [devizanem] => HUF
                        )

                    [1] => SimpleXMLElement Object
                        (
                        )

                )

        )

)

这只返回原始xml，而不删除arak->ar->ar子节点

    [arak] => SimpleXMLElement Object
        (
            [ar] => Array
                (
                    [0] => SimpleXMLElement Object
                        (
                            [cikkid] => 439902
                            [cikkszam] => DVDV-16Z10
                            [listaar] => 1225,0000000
                            [akcios_ar] => 1157,6200000
                            [devizanem] => HUF
                        )

                    [1] => SimpleXMLElement Object
                        (
                        )

                )

        )

)

---

我做错了什么？

SimpleXML中没有：：removeChild这样的东西。

    [arak] => SimpleXMLElement Object
        (
            [ar] => Array
                (
                    [0] => SimpleXMLElement Object
                        (
                            [cikkid] => 439902
                            [cikkszam] => DVDV-16Z10
                            [listaar] => 1225,0000000
                            [akcios_ar] => 1157,6200000
                            [devizanem] => HUF
                        )

                    [1] => SimpleXMLElement Object
                        (
                        )

                )

        )

)

您希望在foreach循环中执行以下操作：

foreach ($arnode as $ar){
    unset($ar->{0});
}

    [arak] => SimpleXMLElement Object
        (
            [ar] => Array
                (
                    [0] => SimpleXMLElement Object
                        (
                            [cikkid] => 439902
                            [cikkszam] => DVDV-16Z10
                            [listaar] => 1225,0000000
                            [akcios_ar] => 1157,6200000
                            [devizanem] => HUF
                        )

                    [1] => SimpleXMLElement Object
                        (
                        )

                )

        )

)

请注意：发布的XML无效，但我确信这只是某种复制粘贴缺陷

    [arak] => SimpleXMLElement Object
        (
            [ar] => Array
                (
                    [0] => SimpleXMLElement Object
                        (
                            [cikkid] => 439902
                            [cikkszam] => DVDV-16Z10
                            [listaar] => 1225,0000000
                            [akcios_ar] => 1157,6200000
                            [devizanem] => HUF
                        )

                    [1] => SimpleXMLElement Object
                        (
                        )

                )

        )

)

完整代码：

    [arak] => SimpleXMLElement Object
        (
            [ar] => Array
                (
                    [0] => SimpleXMLElement Object
                        (
                            [cikkid] => 439902
                            [cikkszam] => DVDV-16Z10
                            [listaar] => 1225,0000000
                            [akcios_ar] => 1157,6200000
                            [devizanem] => HUF
                        )

                    [1] => SimpleXMLElement Object
                        (
                        )

                )

        )

)

---

foreach$arnode as&$ar{unset$ar->{0}；}这还返回原始xmlThis，其中包含一些mods$nodes=simplexml_load_file$arlista[0]；$arnode=$nodes->xpath/valasz/arak/ar/ar；foreach$arnode as$ar{unset$ar[0]；}echo$nodes->asXML；