osticket-api-proxy.php

<?php
$config = array(
  'url'=>'https:/yoursite.com/api/tickets.json',
	'key'=> $_POST['apiKey']
);
	
$data = array(
	'name'      =>      $_POST['name'],
  'email'     =>      $_POST['email'],
  'subject'   =>      $_POST['subject'],
  'message'   =>      $_POST['message'],
  'ip'        =>      $_SERVER['REMOTE_ADDR'],
	'topicId'   =>      '19' // Change to the id of your default topic.
);

set_time_limit(30);

$options = array(
  'http' => array(
    'header'  => "X_API_Key: ".$config['key'],
    'method'  => 'POST',
		'content' => json_encode($data)
   )
);

$context  = stream_context_create($options);
$result = file_get_contents($config['url'], false, $context);
if ($result === FALSE) { die("FAILED"); }

echo($result);

?>