duancao2082 2015-08-20 08:54
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PHP - SimpleXMLElement类型的重载对象与ArrayObject不兼容

I would like to be able to use SimpleXMLElement Object as an Associative array.
I am trying to convert it using the ArrayObject class.

What is so special in a SimpleXMLElement Object that it is not compatible with ArrayObject class?

Note: I am able to convert it in other ways but I am curious why this method does not work.

$dom = new DOMDocument();
$dom->loadHTML($html);
...
var_dump(new ArrayObject(simplexml_import_dom($dom)));

Gives me: Uncaught exception 'InvalidArgumentException' with message 'Overloaded object of type SimpleXMLElement is not compatible with ArrayObject'

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  • dorpbn1027 2015-08-20 09:27
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    I think you are casting it wrong

    $dom = new DOMDocument();
$dom->loadHTML("<html><body>Hello</body></html>");

$myArray = (Array)simplexml_import_dom($dom);

echo $myArray["body"]; //prints "hello"

    Explanation
    ArrayObject suppose to get an object and convert it to a array.

    What makes SimpleXMLElement tricky to work with is that it feels and behaves like an object, but is actually a system RESOURCE, (specifically a libxml resource).

    Edit
    cast the entire xml to array:

    $dom = new DOMDocument();
$dom->loadHTML("<html><body><div><span>Hello</span></div></body></html>");

$myArray = json_decode(json_encode(simplexml_import_dom($dom)),true);

print_r($myArray);

    result:

    Array
(
    [body] => Array
        (
            [div] => Array
                (
                    [span] => Hello
                )

        )

)
    评论

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