When I post my data to controller in codeIgniter so gives an error:
http://[::1]/new_ci/index.php/Admin/getData
I get error.
[::1] refused to connect.
It will most likely be that you have not got your base url set. This is a common thing people are not checking on.
$config['base_url'] = '';
Note: In some cases you do not have to like in older versions of CodeIgniter. But latest versions CodeIgniter 3 and up I would recommend it.
And there for may show url's like below example:
http://[::1]/your_project/
http://127.0.0.1/your_project/
It is best I think to set your base url because you will run in to link errors even though may work on localhost in some cases may not work on live server.
application > config > config.php
$config['base_url'] = 'http://localhost/yourproject/';