Add Request::getFiltered update README.md

Author: Admin

README.md

@@ -278,9 +278,25 @@ for example for lumen:
 ```
 
 OBS
+
 Set `$returnNullOnInvalidColumnAttributeAccess = false;` in model if you want exception instead of null on accessing invalid model attributes (It also needs error_reporting = E_ALL in php ini file).
+
 Set LIVE_MODE=false in your .env file for non prod environments.
 
+Use Request::getFiltered macro to sanitize data retrieved from request
+```php
+(string)\request('signature', '');
+```
+The above will throw Array to string conversion error for query: _?signature[]=_
+The proper way of handling it before:
+```php
+(string)\filter_var(\request('signature', ''), \FILTER_DEFAULT);
+```
+The new way of handling it:
+```php
+(string)\request()->getFiltered('signature', '');
+```
+
 See also [Laravel crud wizard demo](https://github.com/macropay-solutions/laravel-crud-wizard-demo)
 
 ### III. Crud routes