updated readme

README.md

@@ -27,6 +27,14 @@ Select and Handle is a WordPress plugin that allows you to easily select Pages,
 
 ## Configuration
 - You may need to specify the path or URL of your custom PHP file if it is not placed in the default directory. Instructions can be found in the plugin’s settings, or consult your developer for details.
+- ``handle.php`` is packed with code you probably don't need. These are WordPress standards and compatibility and security measures. It will probably also work just fine if you replace it with just this:  
+```
+<?php  
+$ids = $_GET['ids'];  
+echo $ids ;  
+?>
+```
+
 
 ## Contributing
 1. Fork the repository.