Question

在使用PHP中的Simple XML解析XML字符串时，我得到了不一致的XML标记

$str = '<?xml version="1.0"?><toplevel><CompleteSuggestion><suggestion data="google"/></CompleteSuggestion><CompleteSuggestion><suggestion data="google maps"/></CompleteSuggestion><CompleteSuggestion><suggestion data="google translate"/></CompleteSuggestion><CompleteSuggestion><suggestion data="google docs"/></CompleteSuggestion><CompleteSuggestion><suggestion data="google drive"/></CompleteSuggestion><CompleteSuggestion><suggestion data="google classroom"/></CompleteSuggestion><CompleteSuggestion><suggestion data="google news"/></CompleteSuggestion><CompleteSuggestion><suggestion data="google earth"/></CompleteSuggestion><CompleteSuggestion><suggestion data="google flights"/></CompleteSuggestion><CompleteSuggestion><suggestion data="google calendar"/></CompleteSuggestion></toplevel>';
$xml = simplexml_load_string($str);
$data = json_decode(json_encode($xml),true);
echo "ARRAY: <pre>";
var_dump($data);

在上述情况下，我正在使用谷歌的自动完成功能，并在CompleteSuggestions标签内回复建议。看看php数组，我得到一个包含10个项目的CompleteSuggestion数组。前9个键的键为[0]，而最后一个键的键为['suggestion']。这对我来说很奇怪。

有人知道为什么Simple XML会这样做吗？我是如何解决它，或解析它，因为我的foreach正在收到偏移错误。谢谢！

Answer 1

这是一个奇怪的 - 我在5.6上得到了相同的行为（除了1之外，所有这些都得到数字数组）。

作为解决方法，我使用了array_pop：

<?php

$str = '<?xml version="1.0"?><toplevel><CompleteSuggestion><suggestion data="google"/></CompleteSuggestion><CompleteSuggestion><suggestion data="google maps"/></CompleteSuggestion><CompleteSuggestion><suggestion data="google translate"/></CompleteSuggestion><CompleteSuggestion><suggestion data="google docs"/></CompleteSuggestion><CompleteSuggestion><suggestion data="google drive"/></CompleteSuggestion><CompleteSuggestion><suggestion data="google classroom"/></CompleteSuggestion><CompleteSuggestion><suggestion data="google news"/></CompleteSuggestion><CompleteSuggestion><suggestion data="google earth"/></CompleteSuggestion><CompleteSuggestion><suggestion data="google flights"/></CompleteSuggestion><CompleteSuggestion><suggestion data="google calendar"/></CompleteSuggestion></toplevel>';
$xml = simplexml_load_string($str);

$data = json_decode(json_encode($xml),true);


foreach ($data['CompleteSuggestion'] as $suggestion){
        $sug = array_pop($suggestion);

        echo $sug['@attributes']['data'] . "<br />";
}

Answer 2

这是非常有趣的行为。我想，它发生的原因是你的xml中有多个suggestion标签，而SimpleXML试图将这个xml解析为一个名为suggestion的字段的对象，然后当解析器遇到另一个具有相同名称的标签时该对象进入数组。

因此，我不会依赖内置的SimpleXML数据结构，并建议您按照Liam的建议预处理收到的数据。

simplexml_load_string提供不一致的xml标记

2 个答案: