基本的simpleXML工作示例? [英] Basic simpleXML working example?

问题描述

PHP中的simpleXML似乎有很多问题.我正在Windows上运行最新版本的php，但只是无法使simpleXML的基本示例如文档中所述正常工作.

It looks like there are many problems with simpleXML in PHP. I'm running the latest version of php on Windows and I just can not get the basic examples of simpleXML to work as in the documentation.

我的xml文件是:

<?xml version="1.0" encoding="ISO-8859-1"?>
<programme> 
  <title>Billy Bushwaka</title> 
  <episodeNumber>2</episodeNumber> 
  <description>Billy Bushwaka entertains</description> 
  <url>play.swf</url> 
</programme> 

我的PHP程序是:

<?php
$xml = simplexml_load_file("local.xml");

$result = $xml->xpath("//programme");
echo "Title: " . $result . "</br>";
?>

我所得到的是以下内容:

All I get is the following:

标题:数组

我如何获得标题:比利·布什瓦卡"?

How can I get "Title: Billy Bushwaka"?

没有重复的XML数据，所以我不想使用数组.

There are no repeats of XML data so I do not want to use arrays.

推荐答案

SimpleXML 101

1. 首先，请始终在它们代表的节点后命名您的PHP变量.

1. First of all, always name your PHP variables after the node they represent.

// the root node is <programme/>
$programme = simplexml_load_file("local.xml");

访问子级(节点)，就像它们是对象属性一样.

Access to children (nodes) as if they were object properties.

echo $programme->title;

如果有多个子代使用相同的名称，则可以指定其从0开始的位置

If there are multiple children using the same name, you can specify their 0-based position

// first <title/> child
echo $programme->title[0];

// create or change the value of the second <title/> child
$programme->title[1] = 'Second title';

像访问数组键一样访问属性

Access to attributes as if they were array keys

// <mynode attr="attribute value" />
echo $mynode['attr'];

XPath始终返回一个数组.

XPath always returns an array.

---

回到您的情况，访问该<title />节点的最佳方法将是

---

Back to your case, the best way to access that <title /> node would be

$programme = simplexml_load_file("local.xml");
echo "Title: " . $programme->title;

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