Merge pull request #7241 from kenjis/docs-environments.rst

docs: improve environments.rst

Author: samsonasik

user_guide_src/source/general/environments.rst

@@ -48,8 +48,8 @@ The simplest method to set the variable is in your :doc:`.env file </general/con
 Apache
 ------
 
-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>`_.
+This server variable can be set in your **.htaccess** file or Apache
+config using `SetEnv <https://httpd.apache.org/docs/2.4/mod/mod_env.html#setenv>`_.
 
 .. code-block:: apache
 
@@ -58,11 +58,11 @@ config using `SetEnv <https://httpd.apache.org/docs/2.2/mod/mod_env.html#setenv>
 
 .. _environment-nginx:
 
-nginx
+Nginx
 -----
 
-Under nginx, you must pass the environment variable through the ``fastcgi_params``
-in order for it to show up under the `$_SERVER` variable. This allows it to work on the
+Under Nginx, you must pass the environment variable through the ``fastcgi_params``
+in order for it to show up under the ``$_SERVER`` variable. This allows it to work on the
 virtual-host level, instead of using `env` to set it for the entire server, though that
 would work fine on a dedicated server. You would then modify your server config to something
 like:
@@ -80,7 +80,7 @@ like:
         }
     }
 
-Alternative methods are available for nginx and other servers, or you can
+Alternative methods are available for Nginx and other servers, or you can
 remove this logic entirely and set the constant based on the server's IP address
 (for instance).
 
@@ -102,17 +102,17 @@ a fresh install:
 * production.php
 * testing.php
 
-Effects On Default Framework Behavior
+Effects on Default Framework Behavior
 =====================================
 
-There are some places in the CodeIgniter system where the ENVIRONMENT
+There are some places in the CodeIgniter system where the ``ENVIRONMENT``
 constant is used. This section describes how default framework behavior
 is affected.
 
 Error Reporting
 ---------------
 
-Setting the ENVIRONMENT constant to a value of ``development`` will cause
+Setting the ``ENVIRONMENT`` constant to a value of ``development`` will cause
 all PHP errors to be rendered to the browser when they occur.
 Conversely, setting the constant to ``production`` will disable all error
 output. Disabling error reporting in production is a