我很难理解使用SimpleXMLElement打印数组结果的正确语法。根据我的xml结果，我必须要求用户将自己与数组中的一个人进行匹配，但我不确定什么是最好的方法。
示例XML结果：
[authentication] => SimpleXMLElement Object
(
[age] => SimpleXMLElement Object
(
[code] => 5
[ambiguous] => SimpleXMLElement Object
(
[person] => Array
(
[0] => SimpleXMLElement Object
(
[name] => Paul Foreman
[question] => SimpleXMLElement Object
(
[id] => dcalc3
[prompt] => What+do+the+%3Cb%3Elast+four%3C%2Fb%3E+digits+of+your+Social+Security+Number+add+up+to%3F
[answer] => 5
)
)
[1] => SimpleXMLElement Object
(
[name] => Paul Foreman
[question] => SimpleXMLElement Object
(
[id] => dcalc3
[prompt] => What+do+the+%3Cb%3Elast+four%3C%2Fb%3E+digits+of+your+Social+Security+Number+add+up+to%3F
[answer] => 6
)
)
)
)
)
)
我正在寻找的解决方案：
<?php
$string = $xml_result;
$xml = new SimpleXMLElement($string);
$is_age_code = $xml->authentication->{'age'}->code;
if($x_is_age_code == '5'){
// code 5 means more than one match found
// Ask user verification question
// If answer matches question
// Set current user as that person
}
?>
我如何找出数组中有多少"人"，并用数字来识别他们？
要计算使用的人数：
echo count($xml->authentication->age->ambiguous->person);
要访问个人的子节点，请使用
echo $xml->authentication->age->ambiguous->person[0]->question->prompt;
或带有环路：
foreach ($xml->authentication->age->ambiguous->person as $person) {
echo $person->question->prompt;
}