chamilo-lms2/main/gradebook/gradebook.php

<?php
/* For licensing terms, see /license.txt */
/**
 * Script
 * @package chamilo.gradebook
 */
// $cidReset : This is the main difference with gradebook.php, here we say,
// basically, that we are inside a course, and many things depend from that
$cidReset= true;
$_in_course = false;
//make sure the destination for scripts is index.php instead of gradebook.php
require_once '../inc/global.inc.php';
if (!empty($_GET['course'])) {
    $_SESSION['gradebook_dest'] = 'index.php';
    $this_section = SECTION_COURSES;
} else {
    $_SESSION['gradebook_dest'] = 'gradebook.php';
    $this_section = SECTION_MYGRADEBOOK;
    unset($_GET['course']);
}

$htmlHeadXtra[] = '<script type="text/javascript">
$(document).ready( function() {
	for (i=0;i<$(".actions").length;i++) {
		if ($(".actions:eq("+i+")").html()=="<table border=\"0\"></table>" || $(".actions:eq("+i+")").html()=="" || $(".actions:eq("+i+")").html()==null) {
			$(".actions:eq("+i+")").hide();
		}
	}
 } );
 </script>';
api_block_anonymous_users();

$htmlHeadXtra[]= '<script type="text/javascript">
function confirmation ()
{
	if (confirm("' . get_lang('DeleteAll') . '?"))
		{return true;}
	else
		{return false;}
}
</script>';
$filter_confirm_msg = true;
$filter_warning_msg = true;
// ACTIONS

//this is called when there is no data for the course admin
if (isset ($_GET['createallcategories'])) {
    GradebookUtils::block_students();
    $coursecat= Category :: get_not_created_course_categories(api_get_user_id());
    if (!count($coursecat) == 0) {
        foreach ($coursecat as $row) {
            $cat= new Category();
            $cat->set_name($row[1]);
            $cat->set_course_code($row[0]);
            $cat->set_description(null);
            $cat->set_user_id(api_get_user_id());
            $cat->set_parent_id(0);
            $cat->set_weight(0);
            $cat->set_visible(0);
            $cat->add();
            unset ($cat);
        }
    }
    header('Location: '.$_SESSION['gradebook_dest'].'?addallcat=&selectcat=0');
    exit;
}
//move a category
$selectcat=isset($_GET['selectcat']) ?  Security::remove_XSS($_GET['selectcat']) : '';

if (isset ($_GET['movecat'])) {
    $move_cat=Security::remove_XSS($_GET['movecat']);
    GradebookUtils::block_students();
    $cats= Category :: load($move_cat);
    if (!isset ($_GET['targetcat'])) {
        $move_form= new CatForm(CatForm :: TYPE_MOVE,
            $cats[0],
            'move_cat_form',
            null,
            api_get_self() . '?movecat=' . $move_cat
            . '&selectcat=' . Security::remove_XSS($_GET['selectcat']));
        if ($move_form->validate()) {
            header('Location: ' . api_get_self() . '?selectcat=' . Security::remove_XSS($_GET['selectcat'])
                . '&movecat=' . $move_cat
                . '&targetcat=' . $move_form->exportValue('move_cat'));
            exit;
        }
    } else {
        $get_target_cat=Security::remove_XSS($_GET['targetcat']);
        $targetcat= Category :: load($get_target_cat);
        $course_to_crsind = ($cats[0]->get_course_code() != null && $targetcat[0]->get_course_code() == null);

        if (!($course_to_crsind && !isset($_GET['confirm']))) {
            $cats[0]->move_to_cat($targetcat[0]);
            header('Location: ' . api_get_self() . '?categorymoved=&selectcat=' . Security::remove_XSS($_GET['selectcat']));
            exit;
        }
        unset ($targetcat);
    }
    unset ($cats);
}

//move an evaluation
if (isset ($_GET['moveeval'])) {
    GradebookUtils::block_students();
    $get_move_eval=Security::remove_XSS($_GET['moveeval']);
    $evals= Evaluation :: load($get_move_eval);
    if (!isset ($_GET['targetcat'])) {

        $move_form= new EvalForm(EvalForm :: TYPE_MOVE,
            $evals[0],
            null,
            'move_eval_form',
            null,
            api_get_self() . '?moveeval=' . $get_move_eval
            . '&selectcat=' . Security::remove_XSS($_GET['selectcat']));

        if ($move_form->validate()) {
            header('Location: ' .api_get_self() . '?selectcat=' . Security::remove_XSS($_GET['selectcat'])
                . '&moveeval=' . $get_move_eval
                . '&targetcat=' . $move_form->exportValue('move_cat'));
            exit;
        }
    } else {
        $get_target_cat=Security::remove_XSS($_GET['targetcat']);
        $targetcat= Category :: load($get_target_cat);
        $course_to_crsind = ($evals[0]->get_course_code() != null && $targetcat[0]->get_course_code() == null);

        if (!($course_to_crsind && !isset($_GET['confirm']))) {
            $evals[0]->move_to_cat($targetcat[0]);
            header('Location: ' . api_get_self() . '?evaluationmoved=&selectcat=' . Security::remove_XSS($_GET['selectcat']));
            exit;
        }
        unset ($targetcat);
    }
    unset ($evals);
}

//move a link
if (isset ($_GET['movelink'])) {
    GradebookUtils::block_students();
    $get_move_link=Security::remove_XSS($_GET['movelink']);
    $link= LinkFactory :: load($get_move_link);
    $move_form= new LinkForm(LinkForm :: TYPE_MOVE, null, $link[0], 'move_link_form', null, api_get_self() . '?movelink=' . $get_move_link . '&selectcat=' . Security::remove_XSS($_GET['selectcat']));
    if ($move_form->validate()) {
        $targetcat= Category :: load($move_form->exportValue('move_cat'));
        $link[0]->move_to_cat($targetcat[0]);
        unset ($link);
        header('Location: ' . api_get_self(). '?linkmoved=&selectcat=' . Security::remove_XSS($_GET['selectcat']));
        exit;
    }
}

//parameters for categories
if (isset ($_GET['visiblecat'])) {
    GradebookUtils::block_students();
    if (isset ($_GET['set_visible'])) {
        $visibility_command= 1;
    } else {
        $visibility_command= 0;
    }
    $cats= Category :: load($_GET['visiblecat']);
    $cats[0]->set_visible($visibility_command);
    $cats[0]->save();
    $cats[0]->apply_visibility_to_children();
    unset ($cats);
    if ($visibility_command) {
        $confirmation_message = get_lang('ViMod');
        $filter_confirm_msg = false;
    } else {
        $confirmation_message = get_lang('InViMod');
        $filter_confirm_msg = false;
    }
}
if (isset ($_GET['deletecat'])) {
    GradebookUtils::block_students();
    $cats= Category :: load($_GET['deletecat']);
    //delete all categories,subcategories and results
    if ($cats[0] != null) {
        if ($cats[0]->get_id() != 0) {
            // better don't try to delete the root...
            $cats[0]->delete_all();
        }
    }
    $confirmation_message = get_lang('CategoryDeleted');
    $filter_confirm_msg = false;
}
//parameters for evaluations
if (isset ($_GET['visibleeval'])) {
    GradebookUtils::block_students();
    if (isset ($_GET['set_visible'])) {
        $visibility_command= 1;
    } else {
        $visibility_command= 0;
    }

    $eval= Evaluation :: load($_GET['visibleeval']);
    $eval[0]->set_visible($visibility_command);
    $eval[0]->save();
    unset ($eval);
    if ($visibility_command) {
        $confirmation_message = get_lang('ViMod');
        $filter_confirm_msg = false;
    } else {
        $confirmation_message = get_lang('InViMod');
        $filter_confirm_msg = false;
    }
}
if (isset ($_GET['deleteeval'])) {
    GradebookUtils::block_students();
    $eval= Evaluation :: load($_GET['deleteeval']);
    if ($eval[0] != null) {
        $eval[0]->delete_with_results();
    }
    $confirmation_message = get_lang('GradebookEvaluationDeleted');
    $filter_confirm_msg = false;
}
//parameters for links
if (isset ($_GET['visiblelink'])) {
    GradebookUtils::block_students();
    if (isset ($_GET['set_visible'])) {
        $visibility_command= 1;
    }else {
        $visibility_command= 0;
    }
    $link= LinkFactory :: load($_GET['visiblelink']);
    $link[0]->set_visible($visibility_command);
    $link[0]->save();
    unset ($link);
    if ($visibility_command) {
        $confirmation_message = get_lang('ViMod');
        $filter_confirm_msg = false;
    } else {
        $confirmation_message = get_lang('InViMod');
        $filter_confirm_msg = false;
    }
}
if (isset ($_GET['deletelink'])) {
    GradebookUtils::block_students();
    //fixing #5229
    if (!empty($_GET['deletelink'])) {
        $link= LinkFactory :: load($_GET['deletelink']);
        if ($link[0] != null) {
            $link[0]->delete();
        }
        unset ($link);
        $confirmation_message = get_lang('LinkDeleted');
        $filter_confirm_msg = false;
    }
}
$course_to_crsind = isset ($course_to_crsind) ? $course_to_crsind : '';
if ($course_to_crsind && !isset($_GET['confirm'])) {
    GradebookUtils::block_students();
    if (!isset($_GET['movecat']) && !isset($_GET['moveeval'])) {
        die ('Error: movecat or moveeval not defined');
    }
    $button = '<form name="confirm"
					 method="post"
					 action="'.api_get_self() .'?confirm='
        .(isset($_GET['movecat']) ? '&movecat=' . Security::remove_XSS($_GET['movecat'])
            : '&moveeval=' . Security::remove_XSS($_GET['moveeval']) )
        .'&selectcat=' . Security::remove_XSS($_GET['selectcat'])
        .'&targetcat=' . Security::remove_XSS($_GET['targetcat']).'">
			   <input type="submit" value="'.'  '.get_lang('Ok').'  '.'">
			   </form>';

    $warning_message = get_lang('MoveWarning').'<br><br>'.$button;
    $filter_warning_msg = false;
}
//actions on the sortabletable
if (isset ($_POST['action'])) {
    GradebookUtils::block_students();
    $number_of_selected_items= count($_POST['id']);
    if ($number_of_selected_items == '0') {
        $warning_message = get_lang('NoItemsSelected');
        $filter_warning_msg = false;
    }
    else {
        switch ($_POST['action']) {
            case 'deleted' :
                $number_of_deleted_categories= 0;
                $number_of_deleted_evaluations= 0;
                $number_of_deleted_links= 0;
                foreach ($_POST['id'] as $indexstr) {
                    if (api_substr($indexstr, 0, 4) == 'CATE') {
                        $cats= Category :: load(api_substr($indexstr, 4));
                        if ($cats[0] != null) {
                            $cats[0]->delete_all();
                        }
                        $number_of_deleted_categories++;
                    }
                    if (api_substr($indexstr, 0, 4) == 'EVAL') {
                        $eval= Evaluation :: load(api_substr($indexstr, 4));
                        if ($eval[0] != null) {
                            $eval[0]->delete_with_results();
                        }
                        $number_of_deleted_evaluations++;
                    }
                    if (api_substr($indexstr, 0, 4) == 'LINK') {
                        $id = api_substr($indexstr, 4);
                        if (!empty($id)) {
                            $link= LinkFactory :: load();
                            if ($link[0] != null) {
                                $link[0]->delete();
                            }
                            $number_of_deleted_links++;
                        }
                    }
                }
                $confirmation_message = get_lang('DeletedCategories') . ' : <b>' . $number_of_deleted_categories . '</b><br />' . get_lang('DeletedEvaluations') . ' : <b>' . $number_of_deleted_evaluations . '</b><br />' . get_lang('DeletedLinks') . ' : <b>' . $number_of_deleted_links . '</b><br /><br />' . get_lang('TotalItems') . ' : <b>' . $number_of_selected_items . '</b>';
                $filter_confirm_msg = false;
                break;
            case 'setvisible' :
                foreach ($_POST['id'] as $indexstr) {
                    if (api_substr($indexstr, 0, 4) == 'CATE') {
                        $cats = Category:: load(api_substr($indexstr, 4));
                        $cats[0]->set_visible(1);
                        $cats[0]->save();
                        $cats[0]->apply_visibility_to_children();
                    }
                    if (api_substr($indexstr, 0, 4) == 'EVAL') {
                        $eval = Evaluation:: load(api_substr($indexstr, 4));
                        $eval[0]->set_visible(1);
                        $eval[0]->save();
                    }
                    if (api_substr($indexstr, 0, 4) == 'LINK') {
                        $link = LinkFactory:: load(api_substr($indexstr, 4));
                        $link[0]->set_visible(1);
                        $link[0]->save();
                    }
                }
                $confirmation_message = get_lang('ItemsVisible');
                $filter_confirm_msg = false;
                break;
            case 'setinvisible' :
                foreach ($_POST['id'] as $indexstr) {
                    if (api_substr($indexstr, 0, 4) == 'CATE') {
                        $cats = Category:: load(api_substr($indexstr, 4));
                        $cats[0]->set_visible(0);
                        $cats[0]->save();
                        $cats[0]->apply_visibility_to_children();
                    }
                    if (api_substr($indexstr, 0, 4) == 'EVAL') {
                        $eval = Evaluation:: load(api_substr($indexstr, 4));
                        $eval[0]->set_visible(0);
                        $eval[0]->save();
                    }
                    if (api_substr($indexstr, 0, 4) == 'LINK') {
                        $link = LinkFactory:: load(api_substr($indexstr, 4));
                        $link[0]->set_visible(0);
                        $link[0]->save();
                    }
                }
                $confirmation_message = get_lang('ItemsInVisible');
                $filter_confirm_msg = false;
                break;
        }
    }
}

if (isset ($_POST['submit']) && isset ($_POST['keyword'])) {
    header('Location: ' . api_get_self() . '?selectcat=' . Security::remove_XSS($_GET['selectcat'])
        . '&search='.Security::remove_XSS($_POST['keyword']));
    exit;
}
// DISPLAY HEADERS AND MESSAGES                           -

if (!isset($_GET['exportpdf']) and !isset($_GET['export_certificate'])) {
    if (isset ($_GET['studentoverview'])) {
        $interbreadcrumb[]= array (
            'url' => $_SESSION['gradebook_dest'].'?selectcat=' . Security::remove_XSS($_GET['selectcat']),
            'name' => get_lang('ToolGradebook')
        );
        Display :: display_header(get_lang('FlatView'));
    } elseif (isset ($_GET['search'])) {
        if ($_SESSION['gradebook_dest'] == 'index.php') {
            $gradebook_dest = Security::remove_XSS($_SESSION['gradebook_dest']).'?cidReq='.Security::remove_XSS($_GET['course']).'&amp;';
        } else {
            $gradebook_dest = Security::remove_XSS($_SESSION['gradebook_dest']);
        }

        $interbreadcrumb[]= array ('url' => $gradebook_dest,'name' => get_lang('Gradebook'));

        if ((isset($_GET['selectcat']) && $_GET['selectcat']>0)) {
            if (!empty($_GET['course'])) {
                $interbreadcrumb[]= array ('url' => $gradebook_dest.'selectcat='.Security::remove_XSS($_GET['selectcat']),'name' => get_lang('Details'));
            } else {
                $interbreadcrumb[]= array ('url' => $_SESSION['gradebook_dest'].'?selectcat=0','name' => get_lang('Details'));
            }
        }
        Display :: display_header('');
    } else {
        Display :: display_header('');
    }
}

if (isset ($_GET['categorymoved'])) {
    Display :: display_confirmation_message(get_lang('CategoryMoved'),false);
}
if (isset ($_GET['evaluationmoved'])) {
    Display :: display_confirmation_message(get_lang('EvaluationMoved'),false);
}
if (isset ($_GET['linkmoved'])) {
    Display :: display_confirmation_message(get_lang('LinkMoved'),false);
}
if (isset ($_GET['addcat'])) {
    Display :: display_confirmation_message(get_lang('CategoryAdded'),false);
}
if (isset ($_GET['linkadded'])) {
    Display :: display_confirmation_message(get_lang('LinkAdded'),false);
}
if (isset ($_GET['addresult'])) {
    Display :: display_confirmation_message(get_lang('ResultAdded'),false);
}
if (isset ($_GET['editcat'])) {
    Display :: display_confirmation_message(get_lang('CategoryEdited'),false);
}
if (isset ($_GET['editeval'])) {
    Display :: display_confirmation_message(get_lang('EvaluationEdited'),false);
}
if (isset ($_GET['linkedited'])) {
    Display :: display_confirmation_message(get_lang('LinkEdited'),false);
}
if (isset ($_GET['nolinkitems'])) {
    Display :: display_warning_message(get_lang('NoLinkItems'),false);
}
if (isset ($_GET['addallcat'])) {
    Display :: display_normal_message(get_lang('AddAllCat'),false);
}
if (isset ($confirmation_message)) {
    Display :: display_confirmation_message($confirmation_message,$filter_confirm_msg);
}
if (isset ($warning_message)) {
    Display :: display_warning_message($warning_message,$filter_warning_msg);
}
if (isset ($move_form)) {
    Display :: display_normal_message($move_form->toHtml(),false);
}
// LOAD DATA & DISPLAY TABLE                             -
$is_platform_admin= api_is_platform_admin();
$is_course_admin= api_is_allowed_to_edit();

//load data for category, evaluation and links
if (!isset ($_GET['selectcat']) || empty ($_GET['selectcat'])) {
    $category= 0;
} else {
    $category= Security::remove_XSS($_GET['selectcat']);
}
// search form

$simple_search_form = new UserForm(
    UserForm :: TYPE_SIMPLE_SEARCH,
    null,
    'simple_search_form',
    null,
    api_get_self().'?selectcat='.$selectcat
);
$values= $simple_search_form->exportValues();
$keyword = '';
if (isset($_GET['search']) && !empty($_GET['search'])) {
    $keyword = Security::remove_XSS($_GET['search']);
}
if ($simple_search_form->validate() && (empty($keyword))) {
    $keyword = $values['keyword'];
}

if (!empty($keyword)) {
    $cats= Category :: load($category);
    $allcat= array ();
    if ((isset($_GET['selectcat']) && $_GET['selectcat']==0) && isset($_GET['search'])) {
        $allcat= $cats[0]->get_subcategories(null);
        $allcat_info = Category    :: find_category($keyword,$allcat);
        $alleval=array();
        $alllink=array();
    } else {
        $alleval	 = Evaluation  :: find_evaluations($keyword, $cats[0]->get_id());
        $alllink	 = LinkFactory :: find_links($keyword, $cats[0]->get_id());
    }

} elseif (isset ($_GET['studentoverview'])) {
    //@todo this code seems to be deprecated because the gradebook tab is off
    $cats= Category :: load($category);
    $stud_id= (api_is_allowed_to_edit() ? null : api_get_user_id());
    $allcat= array ();
    $alleval= $cats[0]->get_evaluations($stud_id, true);
    $alllink= $cats[0]->get_links($stud_id, true);
    if (isset ($_GET['exportpdf'])) {
        $datagen = new GradebookDataGenerator ($allcat,$alleval, $alllink);
        $header_names = array(
            get_lang('Name'),
            get_lang('Description'),
            get_lang('Weight'),
            get_lang('Date'),
            get_lang('Results'),
        );
        $data_array = $datagen->get_data(GradebookDataGenerator :: GDG_SORT_NAME,0,null,true);
        $newarray = array();
        foreach ($data_array as $data) {
            $newarray[] = array_slice($data, 1);
        }
        $pdf= new Cezpdf();
        $pdf->selectFont(api_get_path(LIBRARY_PATH).'ezpdf/fonts/Courier.afm');
        $pdf->ezSetMargins(30, 30, 50, 30);
        $pdf->ezSetY(810);
        $pdf->ezText(get_lang('FlatView').' ('. api_convert_and_format_date(null, DATE_FORMAT_SHORT) . ' ' . api_convert_and_format_date(null, TIME_NO_SEC_FORMAT) .')',12,array('justification'=>'center'));
        $pdf->line(50,790,550,790);
        $pdf->line(50,40,550,40);
        $pdf->ezSetY(750);
        $pdf->ezTable(
            $newarray,
            $header_names,
            '',
            array(
                'showHeadings' => 1,
                'shaded' => 1,
                'showLines' => 1,
                'rowGap' => 3,
                'width' => 500,
            )
        );
        $pdf->ezStream();
        exit;
    }
} elseif (!empty($_GET['export_certificate'])){
    //@todo this code seems not to be used
    $user_id = strval(intval($_GET['user']));
    if (!api_is_allowed_to_edit(true,true)) {
        $user_id = api_get_user_id();
    }
    $category = Category :: load ($_GET['cat_id']);
    if ($category[0]->is_certificate_available($user_id)) {
        $user = api_get_user_info($user_id);
        $scoredisplay = ScoreDisplay :: instance();
        $scorecourse = $category[0]->calc_score($user_id);
        $scorecourse_display = (isset($scorecourse) ? $scoredisplay->display_score($scorecourse,SCORE_AVERAGE) : get_lang('NoResultsAvailable'));

        $cattotal = Category :: load(0);
        $scoretotal= $cattotal[0]->calc_score($user_id);
        $scoretotal_display = (isset($scoretotal) ? $scoredisplay->display_score($scoretotal,SCORE_PERCENT) : get_lang('NoResultsAvailable'));

        //prepare all necessary variables:
        $organization_name = api_get_setting('Institution');
        $portal_name = api_get_setting('siteName');
        $stud_fn = $user['firstname'];
        $stud_ln = $user['lastname'];
        $certif_text = sprintf(get_lang('CertificateWCertifiesStudentXFinishedCourseYWithGradeZ'),$organization_name,$stud_fn.' '.$stud_ln,$category[0]->get_name(),$scorecourse_display);
        $certif_text = str_replace("\\n","\n",$certif_text);
        $date = api_convert_and_format_date(null, DATE_FORMAT_SHORT);

        $pdf= new Cezpdf('a4','landscape');
        $pdf->selectFont(api_get_path(LIBRARY_PATH).'ezpdf/fonts/Courier.afm');
        $pdf->ezSetMargins(30, 30, 50, 50);
        //line Y coordinates in landscape mode are upside down (500 is on top, 10 is on the bottom)
        $pdf->line(50,50,790,50);
        $pdf->line(50,550,790,550);
        $pdf->ezSetY(450);
        //@todo replace image
        //$pdf->ezImage(api_get_path(SYS_CODE_PATH).'img/dokeos_logo_certif.png',1,400,'','center','');
        $pdf->ezSetY(480);
        $pdf->ezText($certif_text,28,array('justification'=>'center'));
        //$pdf->ezSetY(750);
        $pdf->ezSetY(50);
        $pdf->ezText($date,18,array('justification'=>'center'));
        $pdf->ezSetY(580);
        $pdf->ezText($organization_name,22,array('justification'=>'left'));
        $pdf->ezSetY(580);
        $pdf->ezText($portal_name,22,array('justification'=>'right'));
        $pdf->ezStream();
    }
    exit;
} else {
    $cats= Category :: load($category);
    $stud_id= (api_is_allowed_to_edit() ? null : api_get_user_id());
    $allcat= $cats[0]->get_subcategories($stud_id);
    $alleval= $cats[0]->get_evaluations($stud_id);
    $alllink= $cats[0]->get_links($stud_id);
}
$addparams = array ('selectcat' => $cats[0]->get_id());
if (isset($_GET['search'])) {
    $addparams['search'] = $keyword;
}
if (isset ($_GET['studentoverview'])) {
    $addparams['studentoverview'] = '';
}
if (isset($allcat_info) && count($allcat_info)>=0 && (isset($_GET['selectcat']) && $_GET['selectcat']==0) && isset($_GET['search']) && strlen(trim($_GET['search']))>0 ) {
    $allcat=$allcat_info;
} else {
    $allcat=$allcat;
}
$gradebooktable= new GradebookTable($cats[0], $allcat, $alleval, $alllink, $addparams);
if (((empty ($allcat)) && (empty ($alleval)) && (empty ($alllink)) && (!$is_platform_admin) && ($is_course_admin) && (!isset ($_GET['selectcat']))) && api_is_course_tutor()) {
    Display :: display_normal_message(get_lang('GradebookWelcomeMessage') . '<br /><br /><form name="createcat" method="post" action="' . api_get_self() . '?createallcategories=1"><input type="submit" value="' . get_lang('CreateAllCat') . '"></form>',false);
}
// Here we are in a sub category
if ($category != '0') {
    DisplayGradebook:: header(
        $cats[0],
        1,
        $_GET['selectcat'],
        $is_course_admin,
        $is_platform_admin,
        $simple_search_form
    );
} else {
    // This is the root category
    DisplayGradebook:: header(
        $cats[0],
        (((count($allcat) == '0') && (!isset ($_GET['search']))) ? 0 : 1),
        0,
        $is_course_admin,
        $is_platform_admin,
        $simple_search_form
    );
}
$gradebooktable->display();
Display :: display_footer();