chamilo-lms/main/exercice/stats.php

<?php
/* See license terms in /license.txt */

require_once 'exercise.class.php';
require_once 'question.class.php';
require_once 'answer.class.php';
$language_file = array('exercice', 'tracking');
require_once '../inc/global.inc.php';
require_once 'exercise.lib.php';
$this_section = SECTION_COURSES;

$exercise_id = (isset($_GET['exerciseId']) && !empty($_GET['exerciseId'])) ? intval($_GET['exerciseId']) : 0;

$objExercise = new Exercise();
$result = $objExercise->read($exercise_id);

if (!$result) {
	api_not_allowed(true);
}

$students = CourseManager :: get_student_list_from_course_code(api_get_course_id(), false);
$count_students = count($students);

$question_list = $objExercise->get_validated_question_list();

$data = array();
//Question title 	# of students who tool it 	Lowest score 	Average 	Highest score 	Maximum score
$headers = array(
	get_lang('Question'),
    get_lang('QuestionType'),
	//get_lang('NumberOfStudentsWhoTryTheExercise'),
    get_lang('NumberStudentWhoSelectedIt'),
	get_lang('LowestScore'),
	get_lang('AverageScore'),
	get_lang('HighestScore'),
	get_lang('Weighting')
);

if (!empty($question_list)) {
	foreach($question_list as $question_id) {
		$question_obj = Question::read($question_id);
		$exercise_stats = get_student_stats_by_question($question_id, $exercise_id, api_get_course_id(), api_get_session_id());
        $count_users = get_number_students_question_with_answer_count($question_id, $exercise_id, api_get_course_id(), api_get_session_id());

		$data[$question_id]['name'] 						= cut($question_obj->question, 100);
        $data[$question_id]['type'] 						= $question_obj->get_question_type_name();
		//$data[$question_id]['students_who_try_exercise'] 	= $exercise_stats['users'];
        $percentange = $count_users/$count_students*100;
        
        $data[$question_id]['students_who_try_exercise'] 	= Display::bar_progress($percentange, false, $count_users .' / '.$count_students);
                
		$data[$question_id]['lowest_score'] 				= round($exercise_stats['min'], 2);
		$data[$question_id]['average_score'] 				= round($exercise_stats['average'], 2);
		$data[$question_id]['highest_score'] 				= round($exercise_stats['max'], 2);
		$data[$question_id]['max_score'] 					= round($question_obj->weighting, 2);
	}
}

//Format A table
$table = new HTML_Table(array('class' => 'data_table'));
$row = 0;
$column = 0;
foreach ($headers as $header) {
	$table->setHeaderContents($row, $column, $header);
	$column++;
}
$row++;
foreach ($data as $row_table) {
	$column = 0;
	foreach ($row_table as $cell) {
		$table->setCellContents($row, $column, $cell);
		$table->updateCellAttributes($row, $column, 'align="center"');
		$column++;
	}
	$table->updateRowAttributes($row, $row % 2 ? 'class="row_even"' : 'class="row_odd"', true);
	$row++;
}
$content = $table->toHtml();

//Format B

$headers = array(
	get_lang('Question'),
	get_lang('Answer'),
	get_lang('Correct'),
	get_lang('NumberStudentWhoSelectedIt')	
);

$data = array();

if (!empty($question_list)) {
    $id = 0;
	foreach ($question_list as $question_id) {
		$question_obj = Question::read($question_id);
		$exercise_stats = get_student_stats_by_question($question_id, $exercise_id, api_get_course_id(), api_get_session_id());

        $answer = new Answer($question_id);
		$answer_count = $answer->selectNbrAnswers();
        
        for ($answer_id = 1; $answer_id <= $answer_count; $answer_id++) {            
            $answer_info = $answer->selectAnswer($answer_id);            
            if ($answer_id == 1) {                
                $data[$id]['name']      = cut($question_obj->question, 100);
            } else {
                $data[$id]['name']      = '-';
            }       
            if ($question_obj->type == FILL_IN_BLANKS) {
                $answer_info = substr($answer_info, 0, strpos($answer_info, '::'));
            }
            $data[$id]['answer'] 	= $answer_info;
            $is_correct = $answer->isCorrect($answer_id);
                        
            $data[$id]['correct'] 	= $is_correct == 1 ? get_lang('Yes') : get_lang('No');
            
            $real_answer_id          = $answer->selectAutoId($answer_id);
            
            $count = get_number_students_answer_count($real_answer_id, $question_id, $exercise_id, api_get_course_id(), api_get_session_id());
            //$data[$id]['attempts'] 	= $count.'/'.$count_students;
            $percentange = $count/$count_students*100;
            $data[$id]['attempts'] 	= Display::bar_progress($percentange, false, $count .' / '.$count_students);
            
            
            $id++;
        }
        
	}
}

//Format A table
$table = new HTML_Table(array('class' => 'data_table'));
$row = 0;
$column = 0;
foreach ($headers as $header) {
	$table->setHeaderContents($row, $column, $header);
	$column++;
}
$row++;
foreach ($data as $row_table) {
	$column = 0;
	foreach ($row_table as $cell) {
		$table->setCellContents($row, $column, $cell);
		$table->updateCellAttributes($row, $column, 'align="center"');
		$column++;
	}
	$table->updateRowAttributes($row, $row % 2 ? 'class="row_even"' : 'class="row_odd"', true);
	$row++;
}
$content .= $table->toHtml();


$interbreadcrumb[] = array ("url" => "exercice.php?gradebook=$gradebook", "name" => get_lang('Exercices'));
$interbreadcrumb[] = array ("url" => "admin.php?exerciseId=$exercise_id","name" => $objExercise->name);

$tpl = new Template(get_lang('ReportByQuestion'));

//$actions = array();
//$actions[]= array(get_lang('Back'), Display::return_icon('back.png', get_lang('Back'), 'exercise_report.php?'.$exercise_id));
//$tpl->set_actions($actions);

$actions = '<a href="exercise_report.php?exerciseId='.intval($_GET['exerciseId']).'">' . Display :: return_icon('back.png', get_lang('GoBackToQuestionList'),'',ICON_SIZE_MEDIUM).'</a>';
$actions = Display::div($actions, array('class'=> 'actions'));
$content = $actions.$content;
$tpl->assign('content', $content);
$tpl->display_one_col_template();