Update readme.md

readme.md

@@ -10,6 +10,11 @@ After that, create a new instance of the class.
 $db = new Mysqlidb('host', 'username', 'password', 'databaseName');
 ```
 
+It's also possible to set a table prefix and connection port:
+```php
+$db = new Mysqlidb('host', 'username', 'password', 'databaseName', 'tablePrefix', 'port');
+```
+
 Next, prepare your data, and call the necessary methods. 
 
 ### Insert Query