moodle/blocks/myprofile/block_myprofile.php

<?php
// This file is part of Moodle - http://moodle.org/
//
// Moodle is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// Moodle is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.

/**
 * Block displaying information about current logged-in user.
 *
 * This block can be used as anti cheating measure, you
 * can easily check the logged-in user matches the person
 * operating the computer.
 *
 * @package    block_myprofile
 * @copyright  2010 Remote-Learner.net
 * @author     Olav Jordan <olav.jordan@remote-learner.ca>
 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */

defined('MOODLE_INTERNAL') || die();

/**
 * Displays the current user's profile information.
 *
 * @copyright  2010 Remote-Learner.net
 * @author     Olav Jordan <olav.jordan@remote-learner.ca>
 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */
class block_myprofile extends block_base {
    /**
     * block initializations
     */
    public function init() {
        $this->title = get_string('pluginname', 'block_myprofile');
    }

    /**
     * block contents
     *
     * @return object
     */
    public function get_content() {

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

        if (!isloggedin() or isguestuser()) {
            // Only real users can access myprofile block.
            return;
        }

        $renderable = new \block_myprofile\output\myprofile($this->config);
        $renderer = $this->page->get_renderer('block_myprofile');

        $this->content = new stdClass();
        $this->content->text = $renderer->render($renderable);
        $this->content->footer = '';

        return $this->content;
    }

    /**
     * allow the block to have a configuration page
     *
     * @return boolean
     */
    public function has_config() {
        return false;
    }

    /**
     * allow more than one instance of the block on a page
     *
     * @return boolean
     */
    public function instance_allow_multiple() {
        //allow more than one instance on a page
        return false;
    }

    /**
     * allow instances to have their own configuration
     *
     * @return boolean
     */
    function instance_allow_config() {
        //allow instances to have their own configuration
        return false;
    }

    /**
     * instance specialisations (must have instance allow config true)
     *
     */
    public function specialization() {
    }

    /**
     * locations where block can be displayed
     *
     * @return array
     */
    public function applicable_formats() {
        return array('all'=>true);
    }

    /**
     * post install configurations
     *
     */
    public function after_install() {
    }

    /**
     * post delete configurations
     *
     */
    public function before_delete() {
    }

}