diff options
| -rw-r--r-- | system/libraries/User_agent.php | 21 |
1 files changed, 15 insertions, 6 deletions
diff --git a/system/libraries/User_agent.php b/system/libraries/User_agent.php index e27004e9e..50ac9be98 100644 --- a/system/libraries/User_agent.php +++ b/system/libraries/User_agent.php @@ -471,15 +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); - $referer_host = @parse_url($_SERVER['HTTP_REFERER'], PHP_URL_HOST); - $own_host = parse_url(config_item('base_url'), PHP_URL_HOST); + $result = ($referer_host && $referer_host !== $own_host); + } + } - return ($referer_host && $referer_host !== $own_host); + return $result; } // -------------------------------------------------------------------- |