从 SimpleXMLElement 对象中获取价值

问题描述

我有以下 XML 片段:

Hi I have this following segment of XML:

......
            <Result number="4" position="1" points="25">
                <Driver driverId="button" url="http://en.wikipedia.org/wiki/Jenson_Button">
                    <GivenName>Jenson</GivenName>
                    <FamilyName>Button</FamilyName>
                    <DateOfBirth>1980-01-19</DateOfBirth>
                    <Nationality>British</Nationality>
                </Driver>
......

我可以轻松地使用以下内容来获取 GivenName:

I can use the following easily to get the GivenName:

$item->Driver->GivenName;

但是当我使用:

$item->Driver->FamilyName;

我得到 SimpleXMLElement 对象 ()

I get SimpleXMLElement Object ()

我环顾四周，发现这可能与将它传递给字符串有关，但随后我在屏幕上什么也没有.甚至不是 SimpleXMLElement 对象.

I have looked around and found that it might be something to do with passing it to a string but then I get nothing on screen. Not even SimpleXMLElement Object.

我不明白，因为它是 GivenName 的兄弟姐妹并且有效.

I don't understand as it's a sibling of GivenName and that works.

推荐答案

在这两种情况下你都会得到一个 SimpleXMLElement 对象，如果你使用 print_r() 就会看到:

You get a SimpleXMLElement object in both cases, which you'll see if you use print_r():

print_r ($item->Driver->GivenName);
print_r ($item->Driver->FamilyName);

输出:

SimpleXMLElement Object
(
    [0] => Jenson
)
SimpleXMLElement Object
(
    [0] => Button
)

您可以使用显式转换来获取字符串形式的值:

You can use an explicit cast to get the values as strings:

$givenNameString = (string) $item->Driver->GivenName;
$familyNameString = (string) $item->Driver->FamilyName;

这篇关于从 SimpleXMLElement 对象中获取价值的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！