block_studyprogress.php

<?php
class block_studyprogress extends block_base {

    public function init() {
        $this->title = get_string('pluginname', 'block_studyprogress');
    }

    public function get_css_class() {
	return 'block_studyprogress';
    }

    public function get_content() {
        global $USER;

        if ($this->content !== null) {
            return $this->content;
        }

        $this->content = new stdClass();
        $this->content->footer = '';

        $courses = enrol_get_users_courses($USER->id, true);

        if (empty($courses)) {
            $this->content->text = get_string('nocourses', 'block_studyprogress');
            return $this->content;
        }

        $output = html_writer::start_tag('ul');
        foreach ($courses as $course) {
            $url = new moodle_url('/course/view.php', ['id' => $course->id]);
            $output .= html_writer::tag('li', html_writer::link($url, format_string($course->fullname)));
        }
        $output .= html_writer::end_tag('ul');

        $this->content->text = $output;
        return $this->content;
    }

    public function applicable_formats() {
        return ['all' => true];
    }
}