I used composer to install phpseclib in a directory named /php/

composer require phpseclib/phpseclib:~3.0

Then I made a pull.php with only that :

<?php

require __DIR__ . '/vendor/autoload.php';

$sftp = new SFTP('localhost');

And I got the error :

PHP Fatal error: Uncaught Error: Class “SFTP” not found in /home/web/php/pull.php:5
Stack trace:
#0 {main}
thrown in /home/web/php/pull.php on line 5

What did I do wrong ?
Used the documentation https://phpseclib.com/docs/install

My directory :

• composer.json
• composer.lock
• pull.php
• vendor