Merge branch 'develop' of git://github.com/EllisLab/CodeIgniter into develop

3 files changed, 36 insertions, 5 deletions

diff --git a/user_guide_src/source/general/common_functions.rst b/user_guide_src/source/general/common_functions.rst
index 7917d3239..79bd9b459 100644
--- a/user_guide_src/source/general/common_functions.rst
+++ b/user_guide_src/source/general/common_functions.rst
@@ -31,7 +31,7 @@ version of PHP is lower than the supplied version number.
 is_really_writable()
 ====================
 
-.. php:function:: is_really_writeable($file)
+.. php:function:: is_really_writable($file)
 
 	:param	string	$file: File path
 	:returns:	bool
diff --git a/user_guide_src/source/general/errors.rst b/user_guide_src/source/general/errors.rst
index 8c941aadb..441cedb80 100644
--- a/user_guide_src/source/general/errors.rst
+++ b/user_guide_src/source/general/errors.rst
@@ -18,6 +18,15 @@ procedural interfaces that are available globally throughout the
 application. This approach permits error messages to get triggered
 without having to worry about class/function scoping.
 
+CodeIgniter also returns a status code whenever a portion of the core
+calls ``exit()``. This exit status code is separate from the HTTP status
+code, and serves as a notice to other processes that may be watching of
+whether the script completed successfully, or if not, what kind of 
+problem it encountered that caused it to abort. These values are 
+defined in *application/config/constants.php*. While exit status codes
+are most useful in CLI settings, returning the proper code helps server
+software keep track of your scripts and the health of your application.
+
 The following functions let you generate errors:
 
 show_error()
@@ -36,7 +45,12 @@ following error template::
 	application/errors/error_general.php
 
 The optional parameter ``$status_code`` determines what HTTP status
-code should be sent with the error.
+code should be sent with the error. If ``$status_code`` is less than 100,
+the HTTP status code will be set to 500, and the exit status code will
+be set to ``$status_code + EXIT__AUTO_MIN``. If that value is larger than
+``EXIT__AUTO_MAX``, or if ``$status_code`` is 100 or higher, the exit
+status code will be set to ``EXIT_ERROR``. You can check in 
+*application/config/constants.php* for more detail.
 
 show_404()
 ==========
@@ -53,8 +67,9 @@ the following error template::
 	application/errors/error_404.php
 
 The function expects the string passed to it to be the file path to the
-page that isn't found. Note that CodeIgniter automatically shows 404
-messages if controllers are not found.
+page that isn't found. The exit status code will be set to ``EXIT_UNKNOWN_FILE``.
+Note that CodeIgniter automatically shows 404 messages if controllers are
+not found.
 
 CodeIgniter automatically logs any ``show_404()`` calls. Setting the
 optional second parameter to FALSE will skip logging.
diff --git a/user_guide_src/source/general/reserved_names.rst b/user_guide_src/source/general/reserved_names.rst
index d91292363..ccc17d61b 100644
--- a/user_guide_src/source/general/reserved_names.rst
+++ b/user_guide_src/source/general/reserved_names.rst
@@ -25,15 +25,21 @@ your controller any of these:
 Functions
 ---------
 
+-  :php:func:`is_php()`
 -  :php:func:`is_really_writable()`
 -  ``load_class()``
+-  ``is_loaded()``
 -  ``get_config()``
 -  :php:func:`config_item()`
 -  :php:func:`show_error()`
 -  :php:func:`show_404()`
 -  :php:func:`log_message()`
+-  :php:func:`set_status_header()`
 -  :php:func:`get_mimes()`
 -  :php:func:`html_escape()`
+-  :php:func:`remove_invisible_characters()`
+-  :php:func:`is_https()`
+-  :php:func:`function_usable()`
 -  :php:func:`get_instance()`
 -  ``_exception_handler()``
 -  ``_stringify_attributes()``
@@ -66,4 +72,14 @@ Constants
 -  FOPEN_WRITE_CREATE
 -  FOPEN_READ_WRITE_CREATE
 -  FOPEN_WRITE_CREATE_STRICT
--  FOPEN_READ_WRITE_CREATE_STRICT
\ No newline at end of file
+-  FOPEN_READ_WRITE_CREATE_STRICT
+-  EXIT_SUCCESS
+-  EXIT_ERROR
+-  EXIT_CONFIG
+-  EXIT_UNKNOWN_FILE
+-  EXIT_UNKNOWN_CLASS
+-  EXIT_UNKNOWN_METHOD
+-  EXIT_USER_INPUT
+-  EXIT_DATABASE
+-  EXIT__AUTO_MIN
+-  EXIT__AUTO_MAX
\ No newline at end of file