GoToWebinar register via API example

register.php

//Create string for GoToWebinar from same form POST data
$gtwPost = array(
	"firstName" => $contact_data['FirstName'],
	"lastName"	=> $contact_data['LastName'],
	"email" => $contact_data['Email']
);

$gtwHeaders = array( 
    "Accept:application/vnd.citrix.g2wapi-v1.1+json", 
    "Content-Type:application/json", 
    "Authorization:OAuth oauth_token=xxxxxxxxxx"
); 

$this->data['gtw'] = array(
	'post' => $gtwPost,
	'headers' => $gtwHeaders
);

//Set POST URL for GoToWebinar
$gtw_url = "https://api.citrixonline.com/G2W/rest/organizers/".$organizer_id."/webinars/".$webinar_id."/registrants";

//Start GoToWebinar submission
$curl = @curl_init();
@curl_setopt($curl, CURLOPT_POSTFIELDS, json_encode($gtwPost));
@curl_setopt($curl, CURLOPT_URL, $gtw_url);
#@curl_setopt($curl, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_1_0);
@curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, false);
@curl_setopt($curl, CURLOPT_POST, 1);
@curl_setopt($curl, CURLOPT_HTTPHEADER, $gtwHeaders);
@curl_exec($curl);
$info = @curl_getinfo($curl);
@curl_close($curl);
//End GoToWebinar registrant submission