从xml响应构建数组

我有一个正在构建到数组中的响应。我不得不从原始响应中提取某些id来创建另一个rest连接器。代码看起来是这样的（请原谅变量名，过了一段时间我就没什么想法了）：

foreach ($newArray as $r=>$p){
foreach ($p as $t=>$hoop){

checksession();
$restNew2 = new RESTConnector();

$urlNew2 = "https://localhost:9630/api/users/".$p['user']."/";
$restNew2->createRequest($urlNew2,"GET", null, $_SESSION['cookies'][0]);
$restNew2->sendRequest();

$responseNew2 = $restNew2->getResponse();
$xmlNew2 = new SimpleXMLElement($responseNew2);

$newerArray = array();
foreach ($xmlNew2->children() as $newestChild){
    for($g=0, $count2 = count($xmlNew2); $g < $count2; $g++) {
    $userID = (string)$xmlNew2['id'];
    $first[] = (string)$xmlNew2->name->first;
    $last[] = (string)$xmlNew2->name->last;
$newerArray[$g]['first'] = $first[$g];
}
}
}
}

如果我打印数组，它看起来像：

Array
(
[0] => Array
    (
        [first] => LightSpeed
    )
[1] => Array
    (
        [first] => LightSpeed
    )
[2] => Array
    (
        [first] => LightSpeed
    )
[3] => Array
    (
        [first] => LightSpeed
    )
[4] => Array
    (
        [first] => LightSpeed
    )
[5] => Array
    (
        [first] => LightSpeed
    )
[6] => Array
    (
        [first] => LightSpeed
    )
[7] => Array
    (
        [first] => LightSpeed
    )
[8] => Array
    (
        [first] => LightSpeed
    )
[9] => Array
    (
        [first] => LightSpeed
    )
[10] => Array
    (
        [first] => LightSpeed
    )
[11] => Array
    (
        [first] => LightSpeed
    )
[12] => Array
    (
        [first] => LightSpeed
    )
[13] => Array
    (
        [first] => LightSpeed
    )
[14] => Array
    (
        [first] => LightSpeed
    )
[15] => Array
    (
        [first] => LightSpeed
    )
[16] => Array
    (
        [first] => LightSpeed
    )
[17] => Array
    (
        [first] => LightSpeed
    )
[18] => Array
    (
        [first] => LightSpeed
    )
}

我试图从18张发票中获取用户名，但用户名应该完全不同。当我打印_r（$first}（这是响应中用户的名字）时，我得到了近2000个数组条目，其中确实显示了这些不同的用户名。我弄了好几个小时都弄不明白了。请帮帮我！