docs: add about CI3

bcit-ci · Feb 12, 2024 · 462628e · 462628e
1 parent da637af
commit 462628e
Showing 1 changed file with 13 additions and 3 deletions.
diff --git a/user_guide_src/source/index.rst b/user_guide_src/source/index.rst
@@ -1,6 +1,6 @@
-######################
-CodeIgniter User Guide
-######################
+########################
+CodeIgniter 3 User Guide
+########################
 
 - :doc:`License Agreement <license>`
 - :doc:`Change Log <changelog>`
@@ -9,6 +9,16 @@ CodeIgniter User Guide
    :local:
    :depth: 2
 
+*************
+CodeIgniter 3
+*************
+
+CodeIgniter 3 is the legacy version of the framework, intended for use with PHP
+5.6+. This version is in maintenance, receiving mostly just security updates.
+
+`CodeIgniter 4 <https://codeigniter.com/user_guide/>`_ is the latest version of
+the framework.
+
 *******
 Welcome
 *******