kallzu-email-form.html

<form action="kallzu-integration.php" method="post">
  <p><input type="text" name="name" placeholder="your name here" required="required"></p>
  <p><input type="email" name="email" placeholder="your email here" required="required"></p>
  <p><input type="text" name="phone" placeholder="your phone number here" required="required"></p>
  <p><textarea name="message" placeholder="your message"></textarea></p>
  <p><button type="submit" name="submit_to_kallzu">Submit</button></p>
  <!-- You must use captcha to protect spam -->
</form>

kallzu-integration.php

<?php

// This php script gives an example of sending data to Kallzu server for email lead capture

/*
NOTE:

  1. Data isn't sanitized for the sake of simplicity
  2. Data isn't validated for the sake of simplicity
  3. Make sure you use captcha to protect yourself with spam messages


*/

// Server expects POST request and returns json response
$endpoint = "http://kallzu2.kallzu.com/email-leads.php";

// only message key is optional. All other values are required and server will reject if any value is empty or not set.
// So, put the validation accordingly

$data = array(
  'api_key' => 'xxxx-xxxxx-xxxxx-xxxxx-xxxxx', // put the email lead tracker key you have generated from http://app.kallzu.com/email-leads/
  'domain' => 'mysite.com'
  'campaign_id' => 1 // add your kallzu campaign id here
);


if(!isset($_POST['submit_to_kallzu'])){
  die('form not sent');
}

if(isset($_POST['campaign_id']) && !empty($_POST['campaign_id'])){
    $data['campaign_id'] = (int) $_POST['campaign_id'];
  }else{
    die('No campaign id provided');
}

if(isset($_POST['name']) && !empty($_POST['name'])){
  $data['name'] = $_POST['name']; 
}else{
  die('please enter name');
}

if(isset($_POST['email']) && !empty($_POST['email'])){
  $data['email'] = $_POST['email']; 
}else{
  die('please enter email');
}

if(isset($_POST['phone']) && !empty($_POST['phone'])){
  $data['phone'] = $_POST['phone']; 
}else{
  die('please enter phone');
}

if(isset($_POST['message']) && !empty($_POST['message'])){
  $data['message'] = $_POST['message']; 
}

$response = send_http_request($endpoint, $data); 

// use the $response variable to print error or success message.


function send_http_request($serverUrl, $params, $headers=NULL) {
   //initialise a CURL session
   $connection = curl_init();
   //set the server we are using (could be Sandbox or Production server)
   curl_setopt($connection, CURLOPT_URL, $serverUrl);

   //stop CURL from verifying the peer's certificate
   curl_setopt($connection, CURLOPT_SSL_VERIFYPEER, 0);
   curl_setopt($connection, CURLOPT_SSL_VERIFYHOST, 0);

   //set the headers using the array of headers
   if ($headers)
     curl_setopt($connection, CURLOPT_HTTPHEADER, $headers);

   //set method as POST
   curl_setopt($connection, CURLOPT_POST, 1);

   //set the body of the request
  if ($params)
     curl_setopt($connection, CURLOPT_POSTFIELDS, http_build_query($params));

   //set it to return the transfer as a string from curl_exec
   curl_setopt($connection, CURLOPT_RETURNTRANSFER, 1);

   //Send the Request
   $response = curl_exec($connection);

   //close the connection
   curl_close($connection);

   //return the response
   return $response;
}