PHP的cURL URL将自动输入浏览器的地址栏

Question

我有这段代码：

private function sendToInfusionsoft($xid, $form_name, $firstname, $lastname, $email)
{                       
    $url = "https://company-name.infusionsoft.com/app/form/process/{$xid}";

    $params = [
            'inf_form_xid'=>$xid,
            'inf_form_name'=>$form_name,
            'infusionsoft_version'=>'1.62.0.45',
            'inf_field_FirstName'=>$firstname,
            'inf_field_LastName'=>$lastname,
            'inf_field_Email'=>$email
            ];               
    $params = http_build_query($params);

    $ch = curl_init();
    curl_setopt($ch, CURLOPT_URL, $url);
    curl_setopt($ch, CURLOPT_HEADER, FALSE);        
    curl_setopt($ch, CURLOPT_POST, TRUE);
    curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, FALSE);
    curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);
    curl_setopt($ch, CURLOPT_POSTFIELDS, $params);
    curl_exec($ch);
    curl_close($ch);
}

但是当我在浏览器中运行它时，浏览器的网址实际上是重定向到https://company-name.infusionsoft.com/etc-etc

这怎么不在后台运行？为什么这会在地址栏中显示出来？出于这个原因，它没有重定向到我的网站网址。