PHP Curl Error when using SSL - php

Question

I am trying to use the WHMCS API to connect a third party script to it. I have created the third party's script as follows, however, when I try to connect to my site using HTTPS, I get this error: error:140770FC:SSL routines:SSL23_GET_SERVER_HELLO:unknown protocol
If I use HTTP, I get a 404 error. The code is as follows (and yes, that is my actual domain, since I figured the SSL's specifics might matter):
$email = $_GET["email"];
$password = $_GET["password"];
if(filter_var($email, FILTER_VALIDATE_EMAIL) && strlen($password) > 0) {
$postfields["username"] = $apiusername;
$postfields["password"] = $apipassword;
$postfields["action"] = "validatelogin";
$postfields["email"] = $email;
$postfields["password2"] = $password;
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, "https://tfdidesign.com/accounts/includes/api.php");
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_TIMEOUT, 100);
curl_setopt($ch,CURLOPT_SSL_VERIFYPEER, false);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_POSTFIELDS, $postfields);
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
$data = curl_exec($ch);
if(curl_error($ch))
echo(curl_error($ch));
curl_close($ch);
$data = explode(";",$data);
foreach ($data AS $temp) {
$temp = explode("=",$temp);
$results[$temp[0]] = $temp[1];
}
}
else
die("INVALID_CREDENTIALS");

Answer 1

Define the ssl version for your curl(it can be 2 or 3):
curl_setopt($curl, CURLOPT_SSLVERSION,3);
Also try to use this one:
curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, 2);