PHP请求接口返回 curl请求

/**
 * 请求接口返回内容
 * @param string $url [请求的URL地址]
 * @param string $params [请求的参数]
 * @param int $ipost [是否采用POST形式]
 * @return  string
 */
function HttpRequest($url, $params = false, $ispost = 0)
{
    $httpInfo = array();
    $ch = curl_init();

    curl_setopt($ch, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_1_1);
    curl_setopt($ch, CURLOPT_USERAGENT, 'JuheData');
    curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 3);
    curl_setopt($ch, CURLOPT_TIMEOUT, 5);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
    curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
    if ($ispost) {
        curl_setopt($ch, CURLOPT_POST, true);
        curl_setopt($ch, CURLOPT_POSTFIELDS, $params);
        curl_setopt($ch, CURLOPT_URL, $url);
    } else {
        if ($params) {
            curl_setopt($ch, CURLOPT_URL, $url . '?' . $params);
        } else {
            curl_setopt($ch, CURLOPT_URL, $url);
        }
    }
    $response = curl_exec($ch);
    if ($response === FALSE) {
        //echo "cURL Error: " . curl_error($ch);
        return false;
    }
    $httpCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
    $httpInfo = array_merge($httpInfo, curl_getinfo($ch));
    curl_close($ch);
    return $response;
}

$appkey = "*********************";

//根据查询的IP地址，查询该IP所属的区域
$url = "http://****";
$params = [
    "ip" => "112.112.11.11",//需要查询的IP地址或域名
    "key" => $appkey,//应用APPKEY(应用详细页查询)
];
$paramstring = http_build_query($params);
$content = HttpRequest($url, $paramstring, 1);
$result = json_decode($content, true);
if ($result) {
    if ($result['error_code'] == 0) {
        echo "国家：{$result['result']['Country']}" . PHP_EOL;
        echo "省份：{$result['result']['Province']}" . PHP_EOL;
        echo "城市：{$result['result']['City']}" . PHP_EOL;
        echo "运营商：{$result['result']['Isp']}" . PHP_EOL;
    } else {
        echo "{$result['error_code']}:{$result['reason']}" . PHP_EOL;
    }
} else {
    echo "请求失败";
}