chamilo-lms2/plugin/show_user_info/index.php

<?php
// A user must be logged in.
$_template['show_message'] = false;

if (!api_is_anonymous()) {
    $_template['show_message'] = true;

    // Getting the current user id.
    $user_id = api_get_user_id();

    //Getting the current user info.
    $user_info = api_get_user_info($user_id);

    // You can also use template setting variables in the special variable called template.
    $_template['user_info'] = $user_info;
    $_template['username'] = $user_info['username'];
}