Accessing element contents and namespaced attributes with SimpleXML parser [duplicate] - php

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We've got an XML file with this format:
<Quiz xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:xsd="http://www.w3.org/2001/XMLSchema">
<id>0</id>
<title>Ganz Anderer Titel</title>
<questions>
<Question xsi:type="ChoiceQuestion">
<title>Frage1</title>
<id>0</id>
<rightAnswer>1</rightAnswer>
</Question>
<Question xsi:type="ChoiceQuestion">
<title>Frage2</title>
<id>1</id>
<rightAnswer>2</rightAnswer>
</Question>
<Question xsi:type="ChoiceQuestion">
<title>Frage2</title>
<id>2</id>
<rightAnswer>3</rightAnswer>
</Question>
</questions>
<expireDate>2018-06-06T00:00:00</expireDate>
</Quiz>
We now need to parse this XML file, but we are not able to access the content or attributes of the questions element.
We are using PHP 7 with the built in SimpleXML parser.
echo json_encode($xml->questions);
displays this
{"Question":[{"title":"Frage1","id":"0","rightAnswer":"1"},{"title":"Frage2","id":"1","rightAnswer":"2"},{"title":"Frage2","id":"2","rightAnswer":"3"}]}
but we have no idea how to get the data of each question individually.

Answer 1

As suggested in the comments, a simple foreach loop will let you loop through each item in the list. To get namespaced attributes, use the SimpleXMLElement::attributes() method:
$xml = <<< XML
<Quiz xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:xsd="http://www.w3.org/2001/XMLSchema">
<id>0</id>
<title>Ganz Anderer Titel</title>
<questions>
<Question xsi:type="ChoiceQuestion">
<title>Frage1</title>
<id>0</id>
<rightAnswer>1</rightAnswer>
</Question>
<Question xsi:type="ChoiceQuestion">
<title>Frage2</title>
<id>1</id>
<rightAnswer>2</rightAnswer>
</Question>
<Question xsi:type="ChoiceQuestion">
<title>Frage2</title>
<id>2</id>
<rightAnswer>3</rightAnswer>
</Question>
</questions>
<expireDate>2018-06-06T00:00:00</expireDate>
</Quiz>
XML;
$x = new SimpleXMLElement($xml);
foreach ($x->questions->Question as $q) {
printf(
"Question %d:\nType:%s\nTitle:%s\nRight answer:%s\n",
$q->id,
$q->attributes("xsi", true)->type,
$q->title,
$q->rightAnswer
);
}