title: How to get ISO 3166-1 compatible country code?
body: <p>I am working on displaying list of timezones by country name.</p>
  
  <p>As answered here:
  <a href="https://stackoverflow.com/questions/2826419/country-to-timezones-in-php-zend-framework">Country to timezones in PHP/Zend Framework</a></p>
  
  <p>I am thinking to call <code>DateTimeZone::listIdentifiers(DateTimeZone::PER_COUNTRY, 'US')</code> to list all timezones by country.</p>
  
  <p>Is there any easy way to get list of ISO 3166-1 compatible country codes and their corresponding names in PHP(PHP 5.3)?</p>