update README.md

@@ -3,18 +3,25 @@ Flag Manager for Baytech Sites.
 
 ## Define Flag Directory in your constants.php file
 
-```
-define('DEFAULT_PPG', '14');
+```php
+define('FLAGS_DIR', '<Desired directory to store flags.json file>');
 ```
 
 ## Initialize Flag Manager
 
+```php
+$flagManager = new \BTFlags\FlagManager();
 ```
+
+## Register Flags
+
+```php
 $flagManager = new \BTFlags\FlagManager();
+$flagManager->register();
 ```
 
 ### Data Structure
-```
+```php
 $requestData = array(
   'name' => null|string,
   'is_encrypyed' => true|false,
@@ -29,8 +36,28 @@ $requestData = array(
 );
 ```
 
-## CRUD
+#### Tip:
+
+```php
+  // application/config/hooks.php
+  $hook['post_controller_constructor'][] = array(
+    'class' => 'Flag',
+    'function' => 'register',
+    'filename' => 'Flag.php',
+    'filepath' => 'hooks',
+  );
+
+  // application/hooks/Flags.php
+  class Flag{
+    public function register(){
+        $flagManager = new \LawFormsUSA\Flags\FlagManager();
+        $flagManager->register();
+    }
+  }
 ```
+
+## CRUD
+```php
 // Create a Flag
 $created = $flagManager->create($requestData);
 
@@ -43,3 +70,46 @@ $updated = $flagManager->update($requestData);
 // Get all Flags
 $flags = $flagManager->all();
 ```
+
+## Retrieving a flag
+
+```php
+// Parameters:
+// $flagName: String = Name of the flag.
+// (Optional) $encrypted: bool = If the inputted $flagName is encrypted, set this to true, otherwise, false.
+// (Optional) $default: String = Default value if flag is empty.
+// (Option) $driver: String = Driver (cookie or session).
+\BTFlags\Flags::get($flagName, [$encrypted, $default, $driver]);
+```
+
+#### Example Usage:
+
+```php
+// Getting an encrypted flag
+// Example Flag:
+// Name:
+//    'mode' => 'edom'
+// Accepted Values:
+//    'live' => 'prod'
+//    'test' => 'dev'
+\BTFlags\Flags::get('edom', true);
+
+// Getting a non-encrypted flag
+\BTFlags\Flags::get('source');
+```
+
+#### Tip:
+
+```php
+// utility_helper.php
+if (!function_exists('flag')){
+  function flag($flag, $default = null, $encrypted = false){
+    return \BTFlags\Flags::get($flag, $encrypted, $default);
+  }
+}
+
+// Use anywhere:
+flag('mode');
+flag('source');
+flag('pmt', 'rec');
+```
\ No newline at end of file