Magento – How to Find the Shipping Method Code

AS i have seen in your reference link you can also see

code for

1) table rates shipping method == flatrate_flatrate

2) cash on delivery" payment method. == cashondelivery

EDIT

class Mage_Shipping_Model_Carrier_Tablerate
    extends Mage_Shipping_Model_Carrier_Abstract
    implements Mage_Shipping_Model_Carrier_Interface
{

    /**
     * code name
     *
     * @var string
     */
    protected $_code = 'tablerate';
}

Simple Magento shipping method code

<pre>Array
(
    [0] => Array
        (
            [value] => Array
                (
                    [0] => Array
                        (
                            [value] => flatrate_flatrate
                            [label] => Fixed
                        )

                )

            [label] => Flat Rate
        )

    [1] => Array
        (
            [value] => Array
                (
                    [0] => Array
                        (
                            [value] => freeshipping_freeshipping
                            [label] => Free
                        )

                )

            [label] => Free Shipping
        )

    [2] => Array
        (
            [value] => Array
                (
                    [0] => Array
                        (
                            [value] => tablerate_bestway
                            [label] => Table Rate
                        )

                )

            [label] => Best Way
        )

    [3] => Array
        (
            [value] => Array
                (
                )

            [label] => Best Way
        )

)

i am sure it will help you.

I just create some code hopefully its help u.

create test.php on your project root directory.

require __DIR__. '/app/bootstrap.php'; 

require __DIR__.'/TestApp.php';

$bootstrap = \Magento\Framework\App\Bootstrap::create(BP, $_SERVER);
$obj = $bootstrap->getObjectManager(); /** @var
\Magento\Framework\App\State $state */ $state =
$obj->get(\Magento\Framework\App\State::class);
$state->setAreaCode('frontend');

/** @var \Magento\Framework\App\Http $app */ $app =
$bootstrap->createApplication(TestApp::class);

$bootstrap->run($app);

Then create TestApp.php on your project root directory.

use Magento\Shipping\Model\Config\Source\Allmethods;

class TestApp extends \Magento\Framework\App\Http implements
\Magento\Framework\AppInterface {

    public function launch() {
        /** @var \Magento\Shipping\Model\Config\Source\Allmethods $allmethods */
        $allmethods = $this->_objectManager->get(Allmethods::class);

        echo"<pre>";
        print_r($allmethods->toOptionArray());

        return $this->_response;
    }

}