通过属性值PHP对XML进行排序 [英] Sort XML via attribute value PHP

问题描述

所以我有一个XML文件，该文件要根据属性"order"按顺序循环遍历.

So I have an XML file that I am trying to loop through in order, according to the attribute, "order".

这里是一个例子:

<page>
<talentTrees>
<tree name="Football" order="2">
<tree name="Baseball" order="0">
<tree name="Frisbee" order="1">
</talentTrees>
</page>

我的目标是使用foreach遍历每棵树"，但是我想按order属性的顺序阅读它们:棒球，飞盘，足球. (0,1,2).

My goal is to loop through each "tree" using foreach, but I want to read them in order of the order attribute: Baseball, Frisbee, Football. (0,1,2).

抱歉，英语不好，不是我的母语.

Sorry for poor English, not my first language.

推荐答案

这应该为您提供想要的东西:

This should give you what you want:

$string = <<<EOS
<page>
<talentTrees>
<tree name="Football" order="2" />
<tree name="Baseball" order="0" />
<tree name="Frisbee" order="1" />
</talentTrees>
</page>
EOS;

$xml = simplexml_load_string($string);

$trees = $xml->xpath('/page/talentTrees/tree');
function sort_trees($t1, $t2) {
    return strcmp($t1['order'], $t2['order']);
}

usort($trees, 'sort_trees');
var_dump($trees);

$trees现在按订单属性排序.

$trees are now sorted by the order attribute.

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