completed documentation

README.md

 ## Description
 
-This role installs, enables and configures the PHP module `<module>`.
+This role installs, enables and configures the PHP module `soap`.
 
 ## Requirements
 
 ### Variables
 
+* php_mod_soap_wsdl_cache_enabled
+  * description:
+    * This option enables or disables the WSDL caching feature.
+  * default: 1
+
+* php_mod_soap_wsdl_cache_dir
+  * description:
+    * This option sets the directory name where the SOAP extension will put cache files.
+  * default: "/tmp"
+
+* php_mod_soap_wsdl_cache_ttl
+  * description:
+    * This option sets the number of seconds (time to live) that cached files will be used instead of the originals.
+  * default: 86400
+
+* php_mod_soap_wsdl_cache
+  * description:
+    * This option determines the type of caching. 
+  * default: 1
+
+* php_mod_soap_wsdl_cache_limit
+  * description:
+    * This option specifies the maximum number of in-memory cached WSDL files. 
+  * default: 5
+
 ## Processes
 
 None