PHP-SDK for IataCodes.org
Example:
include 'IataCodes.php';
$ic = new IataCodes('YOUR-API-KEY', '4');
$result = $ic->api('stats');
print_r( $result['response']);
$result = $ic->api('countries', array('code' => 'FR'));
print_r( $result['response']);
$result = $ic->api('timezones');
print_r( $result['response'])