/**
* If HTTP_AUTHORIZATION does not exist tries to get it from
* getallheaders() when available.
*
* @param Environment $environment The Slim application Environment
*
* @return Environment
*/
public static function determineAuthorization(Environment $environment)
{
$authorization = $environment->get('HTTP_AUTHORIZATION');
if (null === $authorization && is_callable('getallheaders')) {
$headers = getallheaders();
$headers = array_change_key_case($headers, CASE_LOWER);
if (isset($headers['authorization'])) {
$environment->set('HTTP_AUTHORIZATION', $headers['authorization']);
}
}
return $environment;
}