Citrix API Helper - some functionality to call the API, and a speicalised webinar call to get webinars, optionally filtered by keyword and optionally limited to a max number to return.

initWebinars.php

// create a webinar interface
$interface = new WebinarInterface();

// get the webinar data, pass filter and limit (null if not required) 
$data = $interface->getWebinars('aCloud', 3);

webinar.php

<?php    

/**
 * Webinar interface
 * 
 * @author Russell Kirkland, fffunction
 * 
 * Interface with the Citrix API
 */

class WebinarInterface 
{
  // Access Token - will expire on 16.4.2014
  private $organizer_key = 'xxxxxxxxxxxxxxxxxx';
	private $access_token = 'xxxxxxxxxxxxxxxxx';

	// get webinars
	public function getWebinars($filter = null, $limit = null)
	{
		$webinars 			= null;
		$filtered_webinars 	= null;
		$url 			= 'https://api.citrixonline.com/G2W/rest/organizers/' . $this->organizer_key . '/upcomingWebinars';
		$headers 		= 	array(	
							'Accept: application/json', 
							'Content-Type: application/json',
							'Authorization: OAuth oauth_token=' . $this->access_token
						);

		// get the data, catch exceptions if thrown
		try {
			$webinars =  $this->callAPI($url, $headers);
		} 
		catch (Exception $e) {
			error_log('Caught exception: ' . $e->getMessage() . "\n");
			return null;
		}

		// filter the data if filter passed
		if ($filter)
		{
			foreach ($webinars as $webinar) {
		      if (stripos($webinar['subject'], $filter) !== false) {
		          $filtered_webinars[] = $webinar;
		      }
		    }
	    } 
	    else $filtered_webinars = $webinars;

	    // limit if limit required
	    if ($limit) $filtered_webinars = array_slice($filtered_webinars, 0, $limit);

	    // return the data
	    return $filtered_webinars;
	}

	// call the API
	private function callAPI($Url, $headers) 
	{

		$ch = curl_init();
		curl_setopt($ch, CURLOPT_URL, $Url);
		curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
		curl_setopt($ch, CURLOPT_HEADER, 0);            // No header in the result 
		curl_setopt($ch, CURLOPT_RETURNTRANSFER, true); // Return, do not echo result 

		// Fetch and return content, save it.
		$raw_data = curl_exec($ch);
		curl_close($ch);

		// If the API is JSON, use json_decode.
		$data = json_decode($raw_data, true);

		// handle invalid data
		if (isset($data['int_err_code'])) throw new Exception($data['msg']);
		if (isset($data['incident'])) throw new Exception($data['description']);

		// return the data
		return($data);
	}

}

?>