Merge branch 'refs/heads/develop' into feature/form_error_msgs

Conflicts:
	system/language/english/form_validation_lang.php
	user_guide_src/source/libraries/form_validation.rst

Signed-off-by: Eric Roberts <eric@cryode.com>

1 files changed, 9 insertions, 3 deletions

diff --git a/user_guide_src/source/general/environments.rst b/user_guide_src/source/general/environments.rst
index 40725feba..d74ebb8d5 100644
--- a/user_guide_src/source/general/environments.rst
+++ b/user_guide_src/source/general/environments.rst
@@ -11,10 +11,16 @@ when "live".
 The ENVIRONMENT Constant
 ========================
 
-By default, CodeIgniter comes with the environment constant set to
+By default, CodeIgniter comes with the environment constant set to use
+the value provided in ``$_SERVER['CI_ENV']``, otherwise defaults to
 'development'. At the top of index.php, you will see::
 
-	 define('ENVIRONMENT', 'development');
+	define('ENVIRONMENT', isset($_SERVER['CI_ENV']) ? $_SERVER['CI_ENV'] : 'development');
+
+This server variable can be set in your .htaccess file, or Apache 
+config using `SetEnv <https://httpd.apache.org/docs/2.2/mod/mod_env.html#setenv>`_. 
+Alternative methods are available for nginx and other servers, or you can 
+remove this logic entirely and set the constant based on the HTTP_HOST or IP.
 
 In addition to affecting some basic framework behavior (see the next
 section), you may use this constant in your own development to
@@ -43,4 +49,4 @@ Optionally, you can have CodeIgniter load environment-specific
 configuration files. This may be useful for managing things like
 differing API keys across multiple environments. This is described in
 more detail in the environment section of the `Config
-Class <../libraries/config.html#environments>`_ documentation.
+Class <../libraries/config.html#environments>`_ documentation.
\ No newline at end of file