Log IP Keys (Symfony)

gistfile1.php

<?php

$ip_keys = array('HTTP_CLIENT_IP', 'HTTP_X_FORWARDED_FOR', 'HTTP_X_FORWARDED', 'HTTP_X_CLUSTER_CLIENT_IP', 'HTTP_FORWARDED_FOR', 'HTTP_FORWARDED', 'REMOTE_ADDR');
foreach ($ip_keys as $key) {
      foreach (explode(',', $_SERVER[$key]) as $ip) {
              $ip = trim($ip);
          sfContext::getInstance()->getLogger()->err(sprintf('%s %s', $key, $ip));             
      }
}