chamilo-lms2/plugin/customfooter/lib/customfooter_plugin.class.php

<?php

/**
 * Description of Custom Footer.
 *
 * @copyright (c) 2014 VF Consulting
 * @license GNU General Public License - http://www.gnu.org/copyleft/gpl.html
 * @author Valery Fremaux <valery.fremaux@gmail.com>
 */
class CustomFooterPlugin extends Plugin
{
    protected function __construct()
    {
        parent::__construct('1.1', 'Valery Fremaux');
    }

    /**
     * @return CustomFooterPlugin
     */
    public static function create()
    {
        static $result = null;

        return $result ? $result : $result = new self();
    }

    public function get_name()
    {
        return 'customfooter';
    }

    public function pix_url($pixname, $size = 16)
    {
        global $_configuration;

        if (file_exists(
            $_configuration['root_sys'].'/plugin/customplugin/pix/'.$pixname.'.png'
        )) {
            return $_configuration['root_web'].'/plugin/customplugin/pix/'.$pixname.'.png';
        }
        if (file_exists(
            $_configuration['root_sys'].'/plugin/customplugin/pix/'.$pixname.'.jpg'
        )) {
            return $_configuration['root_web'].'/plugin/customplugin/pix/'.$pixname.'.jpg';
        }
        if (file_exists(
            $_configuration['root_sys'].'/plugin/customplugin/pix/'.$pixname.'.gif'
        )) {
            return $_configuration['root_web'].'/plugin/customplugin/pix/'.$pixname.'.gif';
        }

        return $_configuration['root_web'].'/main/img/icons/'.$size.'/'.$pixname.'.png';
    }
}