无论上下文如何，都将SimpleXML对象强制为字符串 [英] Forcing a SimpleXML Object to a string, regardless of context

问题描述

假设我有一些这样的XML

Let's say I have some XML like this

<channel>
  <item>
    <title>This is title 1</title>
  </item>
</channel>

下面的代码实现了我想要的功能，它将标题输出为字符串

The code below does what I want in that it outputs the title as a string

$xml = simplexml_load_string($xmlstring);
echo $xml->channel->item->title;

这是我的问题.下面的代码在该上下文中并未将标题视为字符串，因此我最终在数组中使用了SimpleXML对象而不是字符串.

Here's my problem. The code below doesn't treat the title as a string in that context so I end up with a SimpleXML object in the array instead of a string.

$foo = array( $xml->channel->item->title );

我一直在这样解决它

$foo = array( sprintf("%s",$xml->channel->item->title) );

但这看起来很丑.

无论上下文如何，将SimpleXML对象强制为字符串的最佳方法是什么?

推荐答案

将SimpleXMLObject类型转换为字符串:

$foo = array( (string) $xml->channel->item->title );

上面的代码在内部调用SimpleXMLObject上的__toString().此方法不是公开可用的，因为它会干扰SimpleXMLObject的映射方案，但仍可以按上述方式调用.

The above code internally calls __toString() on the SimpleXMLObject. This method is not publicly available, as it interferes with the mapping scheme of the SimpleXMLObject, but it can still be invoked in the above manner.

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