Joomla! 3 user login programmatically using a simple php snippet

joomla-3-user-login-by-code.php

/**
* @var bool $result_login true on successful login, false otherwise
*/
$result_login = Factory::getApplication()->login(
                    [
                        'username' => 'example',
                        'password' => 'mysupersecretpassword'
                    ],
                    [
                        'remember' => true,
                        'silent'   => true
                    ]
                );