用于外部应用程序的typo3引导程序文件

I'm using Typo3 6.2 for a site. I've created a PHP application (based on Yii 1.1) and I want to be able to change the passwords for the users in Typo3 (table fe_users). I understand that the saltedpasswords extension is already integrated in core. The question is:

Which file(s) do I have to include in my PHP application so that I can call the typo3 API to change a user's password? I've found this link which shows code how to change one's password using the Typo3 API

Note: I'm not skilled in Typo3 at all. I have some very basic knowledge of this CMS and nothing else.

I found the solution after some testing. This code effectively bootstraps the Typo3 installation:

define('PATH_site', Yii::app()->params['typo3Path']); // defined in Yii main.php
require Yii::app()->params['typo3Path'] . 'typo3/sysext/core/Classes/Core/Bootstrap.php';
define('TYPO3_MODE', 'FE');
\TYPO3\CMS\Core\Core\Bootstrap::getInstance()
    ->baseSetup('typo3/')
    ->loadConfigurationAndInitialize();

So, using this code and the example code provided in the link in my question, I was able to change a user's password using the current Typo3 parameters (salted, hashed, etc.).