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-rw-r--r--user_guide_src/source/changelog.rst1
-rw-r--r--user_guide_src/source/contributing/index.rst8
-rw-r--r--user_guide_src/source/general/requirements.rst4
-rw-r--r--user_guide_src/source/general/styleguide.rst4
-rw-r--r--user_guide_src/source/installation/upgrade_310.rst13
5 files changed, 21 insertions, 9 deletions
diff --git a/user_guide_src/source/changelog.rst b/user_guide_src/source/changelog.rst
index 76aeecbcb..058eb275f 100644
--- a/user_guide_src/source/changelog.rst
+++ b/user_guide_src/source/changelog.rst
@@ -11,6 +11,7 @@ Release Date: July 26, 2016
- Fixed an SQL injection in the 'odbc' database driver.
- Updated :php:func:`set_realpath()` :doc:`Path Helpr <helpers/path_helper>` function to filter-out ``php://`` wrapper inputs.
+ - Officially dropped any kind of support for PHP 5.2.x and anything under 5.3.7.
- General Changes
diff --git a/user_guide_src/source/contributing/index.rst b/user_guide_src/source/contributing/index.rst
index 739d436a0..be776ec1f 100644
--- a/user_guide_src/source/contributing/index.rst
+++ b/user_guide_src/source/contributing/index.rst
@@ -103,10 +103,10 @@ must also be updated for every change. Also PHPDoc blocks must be maintained.
Compatibility
=============
-CodeIgniter recommends PHP 5.4 or newer to be used, but it should be
-compatible with PHP 5.2.4 so all code supplied must stick to this
-requirement. If PHP 5.3 (and above) functions or features are used then
-there must be a fallback for PHP 5.2.4.
+CodeIgniter recommends PHP 5.6 or newer to be used, but it should be
+compatible with PHP 5.3.7 so all code supplied must stick to this
+requirement. If PHP 5.4 (and above) functions or features are used then
+there must be a fallback for PHP 5.3.7.
Branching
=========
diff --git a/user_guide_src/source/general/requirements.rst b/user_guide_src/source/general/requirements.rst
index f90cdd30d..f2729f3d5 100644
--- a/user_guide_src/source/general/requirements.rst
+++ b/user_guide_src/source/general/requirements.rst
@@ -2,9 +2,9 @@
Server Requirements
###################
-`PHP <http://php.net/>`_ version 5.4 or newer is recommended.
+`PHP <http://php.net/>`_ version 5.6 or newer is recommended.
-It should work on 5.2.4 as well, but we strongly advise you NOT to run
+It should work on 5.3.7 as well, but we strongly advise you NOT to run
such old versions of PHP, because of potential security and performance
issues, as well as missing features.
diff --git a/user_guide_src/source/general/styleguide.rst b/user_guide_src/source/general/styleguide.rst
index 7704a59c5..9b4a84e14 100644
--- a/user_guide_src/source/general/styleguide.rst
+++ b/user_guide_src/source/general/styleguide.rst
@@ -345,8 +345,8 @@ inability for CodeIgniter to send proper headers.
Compatibility
=============
-CodeIgniter recommends PHP 5.4 or newer to be used, but it should be
-compatible with PHP 5.2.4. Your code must either be compatible with this
+CodeIgniter recommends PHP 5.6 or newer to be used, but it should be
+compatible with PHP 5.3.7. Your code must either be compatible with this
requirement, provide a suitable fallback, or be an optional feature that
dies quietly without affecting a user's application.
diff --git a/user_guide_src/source/installation/upgrade_310.rst b/user_guide_src/source/installation/upgrade_310.rst
index 812162308..9e0108691 100644
--- a/user_guide_src/source/installation/upgrade_310.rst
+++ b/user_guide_src/source/installation/upgrade_310.rst
@@ -13,7 +13,18 @@ Replace all files and directories in your *system/* directory.
.. note:: If you have any custom developed files in these directories,
please make copies of them first.
-Step 2: If you're using the 'odbc' database driver, check for usage of Query Builder
+Step 2: Check your PHP version
+==============================
+
+We recommend always running versions that are `currently supported
+<https://secure.php.net/supported-versions.php>`_, which right now is at least PHP 5.6.
+
+PHP 5.2.x versions are now officially not supported by CodeIgniter, and while 5.3.7+
+may be at least runnable, we strongly discourage you from using any PHP versions below
+the ones listed on the `PHP.net Supported Versions <https://secure.php.net/supported-versions.php>`_
+page.
+
+Step 3: If you're using the 'odbc' database driver, check for usage of Query Builder
====================================================================================
:doc:`Query Builder <../database/query_builder>` functionality and ``escape()`` can