completed documentation

README.md

 ## Description
 
-This role installs, enables and configures the PHP module `<module>`.
+This role installs, enables and configures the PHP module `sqlite3`.
 
 ## Requirements
 
 ### Variables
 
+* php_mod_sqlite3_extension_dir
+  * description:
+    * This option specifies the path to the directory where the loadable extensions for SQLite reside. 
+  * default: ""
+
+* php_mod_sqlite3_defensive
+  * description:
+    * When the defensive flag is enabled, language features that allow ordinary SQL to deliberately corrupt the database file are disabled. 
+  * choices: [false, true]
+  * default: true
+
 ## Processes
 
 None