创建 URL 字符串时 XML 中的 & 符号问题 [英] Ampersand problem in XML when creating a URL String
问题描述
我正在处理一个 XML 提要，该提要的节点之一是类似于以下内容的 URL 字符串:
I am working with an XML feed that has, as one of it's nodes, a URL string similar to the following:
http://aflite.co.uk/track/?aid=13414&mid=32532&dl=http://www.google.com/&aref=chris
我知道 & 符号会导致 XML 中的很多问题，应该使用 & 而不是裸露的 & 来转义.因此，我将 php 更改为如下所示:
I understand that ampersands cause a lot of problems in XML and should be escaped by using & instead of a naked &. I therefore changed the php to read as follows:
<node><?php echo ('http://aflite.co.uk/track/?aid=13414&mid=32532&dl=http://www.google.com/&aref=chris'); ?></node>
但是，当这生成 XML 提要时，字符串会显示完整的 &所以实际的 URL 不起作用.如果这是一个非常基本的误解，我们深表歉意，但提供一些指导会很好.
However when this generates the XML feed, the string appears with the full &
and so the actual URL does not work. Apologies if this is a very basic misunderstanding but some guidance would be great.
我也尝试过使用 %26 而不是 & 但仍然遇到同样的问题.
I've also tried using %26 instead of & but still getting the same problem.
推荐答案
如果你在 XML/HTML 中插入一些东西，你应该总是使用 htmlspecialchars 函数.这会将您的字符串转义为正确的 XML 语法.
If you are inserting something into XML/HTML you should always use the htmlspecialchars function. this will escape your strings into correct XML syntax.
但是您遇到了第二个问题.您已将第二个网址添加到第一个网址.这也需要转义为 url 语法.为此，您需要使用 urlencode.
but you are running into a second problem. your have added a second url to the first one. this need also escaped into url syntax. for this you need to use urlencode.
<node><?php echo htmlspecialchars('http://aflite.co.uk/track/?aid=13414&mid=32532&aref=chris&dl='.urlencode('http://www.google.com/')); ?></node>
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