使用SoapClient时如何防止HTTP重定向？

Question

我正在使用标准的SoapClient类向付款服务器发出请求。

$context = stream_context_create([
    'http' => [
        'follow_location' => 0,
    ],
]);

$options = [
    'uri' => 'urn:PaymentServer',
    'location' => 'http://localhost:8001/index.php',
    'features' => SOAP_SINGLE_ELEMENT_ARRAYS,
    'trace' => true,
    'soap_version' => SOAP_1_1,
    'stream_context' => $context,
    'connection_timeout' => 50,
];
$soapClient = new SoapClient(null, $options);

try {
    var_export($soapClient->GetPayment([]));
} catch (Throwable $e) {
    echo $e->getMessage();

    var_export($soapClient->__getLastResponse());
}

脚本http://localhost:8001/index.php包含以下代码

header('Location: http://example.com', true, 302);
exit;

我期望结果为空，但实际输出包含来自example.com的HTML

我在相同的流上下文中尝试过get_file_contents函数：

var_export(file_get_contents('http://localhost:8001/index.php', false, $context));

我有空字符串。

应设置哪些SoapClient或流上下文选项以防止重定向？