Copy2Contact Rest API在每次刷新/重新加载相同的Input文本时返回不同的响应

我使用的是copy2contact rest Api，它在每次重新加载或刷新时对相同的输入文本给出不同的响应。

http://www.copy2contact.com/api/rest.php

    ob_start();
    $text = "John Smith
            123 Spruce Ln.
            Boston, MA 01234
            cell: 676-144-8901
            johnjohn7202@gmail.com";
    $text = urlencode($text);
    $url = "https://api.copy2contact.com/rest/json/ParseContact?text=" . $text . "&emu&authid=1329&pass=123456";
    $curl_request = curl_init();
    curl_setopt($curl_request, CURLOPT_URL, $url);
    curl_setopt($curl_request, CURLOPT_SSL_VERIFYPEER, 0);
    $result = curl_exec($curl_request);
    $http_code = curl_getinfo($curl_request, CURLINFO_HTTP_CODE);
    if ($http_code == 200) {
        $xml = simplexml_load_string($result);
        echo '<?xml version="1.0" encoding="UTF-8"?>';
        echo $result;
        curl_close($curl_request);
        ob_end_flush();
    } else {
        $http_message = curl_error($curl_request);
        var_dump('Error: "' . $http_message . '" having error code ' . $http_code);
        return '';
    }

反应:"{"结果":{"ContactPreNameTitle":","联系名称":"Smitv"、"ContactFirst":"扬"、"ContactMiddle":","ContactPostNameTitles":","ContactTitle":","ContactCompany":","ContactAddress":"722云杉 ............"

当我重新加载时，响应发生变化。"{"结果":{"ContactPreNameTitle":","联系名称":"Smpth"、"ContactFirst":"罗恩"、"ContactMiddle":","ContactPostNameTitles":","ContactTitle":","ContactCompany":","ContactAddress":"023 Sqruce .............."