Update README.md

README.md

@@ -2,3 +2,39 @@
 ```bash
 composer require bermudaphp/registry
 ````
+
+# Set
+```php
+Registry::set('message', 'Hello World');
+
+Registry::getInstance()->offsetSet('message', 'Hello World!');
+Registry::getInstance()['message'] = 'Hello, Jane!';
+
+````
+
+# Get
+```php
+Registry::get('MessaGe', 'default value'); // default value
+
+Registry::getInstance()->offsetGet('message'); // Hello, Jane!
+Registry::getInstance()['message']; // Hello, Jane!;
+
+````
+
+# Exists
+```php
+Registry::has('appVersion'); // false
+
+Registry::getInstance()->offsetExists('message'); // true
+isset(Registry::getInstance()['message']); // true;
+
+````
+
+# Unset
+```php
+Registry::remove('message');
+
+Registry::getInstance()->offsetUnset('message'); 
+unset(Registry::getInstance()['message']);
+
+````