diff options
| -rw-r--r-- | system/libraries/User_agent.php | 19 |
1 files changed, 15 insertions, 4 deletions
diff --git a/system/libraries/User_agent.php b/system/libraries/User_agent.php index 2f6f81909..50ac9be98 100644 --- a/system/libraries/User_agent.php +++ b/system/libraries/User_agent.php @@ -471,13 +471,24 @@ class CI_User_agent { */ public function is_referral() { - if (empty($_SERVER['HTTP_REFERER'])) + static $result; + + if ( ! isset($result)) { - return FALSE; + if (empty($_SERVER['HTTP_REFERER'])) + { + $result = FALSE; + } + else + { + $referer_host = @parse_url($_SERVER['HTTP_REFERER'], PHP_URL_HOST); + $own_host = parse_url(config_item('base_url'), PHP_URL_HOST); + + $result = ($referer_host && $referer_host !== $own_host); + } } - $referer = parse_url($_SERVER['HTTP_REFERER']); - return ! (empty($referer['host']) && strpos(config_item('base_url'), $referer['host']) !== FALSE); + return $result; } // -------------------------------------------------------------------- |