我正在尝试使用save\\u post挂钩向PODS自定义帖子类型中输入的电话号码发送短信。保存记录时应发送短信。

add_action( \'save_post_appointment\', \'sendsms_save\' );
function sendsms_save() {
    $username = \'username\';
    $password = \'password\';
    $msisdn = $_POST["mobile"];
    $content="Hi";
    $data =   "username=".$username."&password=".$password."&message=".urlencode($content)."&msisdn=".urlencode($msisdn);

    $ch = curl_init(\'http://bulksms.com/eapi/submission/send_sms/2/2.0\');
    curl_setopt($ch, CURLOPT_POST, true);
    curl_setopt($ch, CURLOPT_POSTFIELDS,$data);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);

    if ($response = curl_exec($ch)) 
    {
      echo "1";
    } 
    else 
    {
       echo "0";
    }

    curl_close ($ch);
}