如何在PHP中索引XML元素？ [英] How to index XML elements in PHP?

问题描述

我是PHP和XML的虚拟人物，所以请耐心等待我的问题看起来很笨拙。

I am dummy to PHP and XML, so please be patient if my question seems dumb.

我想知道如何索引XML元素，以便我可以访问它们我打算把它们放在一个阵列中。但是，我不知道如何获取返回的元素数量。

I want to know how to index the XML elements so that I can access them. I am planning to put them into an array. However, I don't know how to get the number of elements returned.

以下是代码：

exer.xml

<?xml version="1.0" encoding="ISO-8859-1"?>

<actionstars>
 <name>Jean Claude Van Damme</name>
 <name>Scott Adkins</name>
 <name>Michael Jai White</name>
 <name>Dolph Lundgren</name>
 <name>Tom Cruise</name>
 <name>Michael Worth</name>
</actionstars>

index.php

<?php
 $dom = new DomDocument();
 $dom->load("exer.xml");
 $names = $dom->getElementsByTagName("name");
 echo count($names);
 foreach($names as $name) {
     print $name->textContent . "<br />";
 }
?>

当我执行 echo count（$ names）; 它返回 1 ，这显然不是元素的数量。请帮助。

When I do the echo count($names); it returns 1, which is obviously not the number of elements. Please help.

推荐答案

查看的返回值getElementsByTagName ，这将是 DOMNodeList 。

同样对于您的问题，您可以执行以下操作：

Also for your problem you could do something like:

$names = array();
foreach ($dom->getElementsByTagName("name") as $nameNode) {
  $names[] = $nameNode->nodeValue;
}

您不必真正检查<$ c $的返回值c> getElementsByTagName ，因为它将会是一个DOMNodeList。这样你可以直接在foreach-loop中使用它来分配不需要的变量。

You don't have to actually check the return value of getElementsByTagName, for it will allways be a DOMNodeList. This way you can use it directly in the foreach-loop whithout assigning unneeded variables.

你需要检查的是$ code> $ name的大小，循环后。

What you have to check, is the size of $names, after the loop.

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