list_moodle_categories

<?php
public

function list_categories()
{
    global $CFG, $OUTPUT, $DB;
    $header = '<div>
<h2>category</h2><div class="courses frontpage-course-list-all"><div class="row-fluid">';
    $footer = '</div>
                                </div>
                        </div>';
    $co_cnt = 1;
    $content = '';
    $noimg_url = $OUTPUT - &gt;
    pix_url('no-image', 'theme');
    $categories = $DB - &gt;
    get_records('course_categories', array(
        'visible' = & gt;
        '1',
        'depth' = & gt;
        '1'
    ));
    function URLIsValid($URL)
    {
        $exists = true;
        $file_headers = @get_headers($URL);
        $InvalidHeaders = array(
            '404',
            '403',
            '500'
        );
        foreach($InvalidHeaders as $HeaderVal)
        {
            if (strstr($file_headers[0], $HeaderVal))
            {
                $exists = false;
                break;
            }
        }

        return $exists;
    }

    foreach($categories as $categorie)
    {
        $categorie_url = new moodle_url('/course/category.php', array(
            'id' = & gt;
            $categorie - &gt;
            id
        ));
        $img_url = $OUTPUT - &gt;
        pix_url('categories/' . $categorie - &gt;
        id, 'theme');
        if (!URLIsValid($img_url))
        {
            $img_url = $noimg_url;
        }

        $content.= '<div class="span3"><div class="fp-coursebox"><div class="fp-coursethumb"><a href="' . $categorie_url . '"><img src="' . $img_url . '" width="243" height="165" alt="' . $categorie - &gt;name . '" /></a></div>
<div class="fp-courseinfo"><h5><a href="' . $categorie_url . '">' . $categorie - &gt;name . '</a></h5><div class="readmore"><a href="' . $categorie_url . '">En savoir plus<i class="fa fa-angle-double-right"></i></a></div></div></div></div>';



if (($co_cnt % 4) == "0")
        {
            $content.= '<div class="clearfix hidexs"></div>';
        }

        $co_cnt++;
    }

    $course_html = $header . $content . $footer;
    $frontpage = isset($CFG - &gt;
    frontpage) ? $CFG - &gt;
    frontpage : '';
    $frontpageloggedin = isset($CFG - &gt;
    frontpageloggedin) ? $CFG - &gt;
    frontpageloggedin : '';
    $f1_pos = strpos($frontpage, '6');
    $f2_pos = strpos($frontpageloggedin, '6');
    $btn_html = '';
    if ($co_cnt & lt; = 1 & amp; & amp;
    !$this - &gt;
    page - &gt;
    user_is_editing() & amp; & amp;
    has_capability('moodle/course:create', context_system::instance()))
    {
        $btn_html = $this - &gt;
        add_new_course_button();
    }

    if (!isloggedin() or isguestuser())
    {
        if ($f1_pos === false)
        {
            if ($co_cnt & gt;
            1)
            {
                echo $course_html;
            }
        }
    }
    else
    {
        if ($f2_pos === false)
        {
            echo $course_html . "<br />" . $btn_html;
        }
    }
}