public function test_report_sql()
{
global $DB, $SITE;
$this->resetAfterTest(true);
$generator = $this->getDataGenerator();
$quizgenerator = $generator->get_plugin_generator('mod_quiz');
$quiz = $quizgenerator->create_instance(array('course' => $SITE->id, 'grademethod' => QUIZ_GRADEHIGHEST, 'grade' => 100.0, 'sumgrades' => 10.0, 'attempts' => 10));
$student1 = $generator->create_user();
$student2 = $generator->create_user();
$student3 = $generator->create_user();
$quizid = 123;
$timestamp = 1234567890;
// The test data.
$fields = array('quiz', 'userid', 'attempt', 'sumgrades', 'state');
$attempts = array(array($quiz->id, $student1->id, 1, 0.0, quiz_attempt::FINISHED), array($quiz->id, $student1->id, 2, 5.0, quiz_attempt::FINISHED), array($quiz->id, $student1->id, 3, 8.0, quiz_attempt::FINISHED), array($quiz->id, $student1->id, 4, null, quiz_attempt::ABANDONED), array($quiz->id, $student1->id, 5, null, quiz_attempt::IN_PROGRESS), array($quiz->id, $student2->id, 1, null, quiz_attempt::ABANDONED), array($quiz->id, $student2->id, 2, null, quiz_attempt::ABANDONED), array($quiz->id, $student2->id, 3, 7.0, quiz_attempt::FINISHED), array($quiz->id, $student2->id, 4, null, quiz_attempt::ABANDONED), array($quiz->id, $student2->id, 5, null, quiz_attempt::ABANDONED));
// Load it in to quiz attempts table.
$uniqueid = 1;
foreach ($attempts as $attempt) {
$data = array_combine($fields, $attempt);
$data['timestart'] = $timestamp + 3600 * $data['attempt'];
$data['timemodifed'] = $data['timestart'];
if ($data['state'] == quiz_attempt::FINISHED) {
$data['timefinish'] = $data['timestart'] + 600;
$data['timemodifed'] = $data['timefinish'];
}
$data['layout'] = '';
// Not used, but cannot be null.
$data['uniqueid'] = $uniqueid++;
$data['preview'] = 0;
$DB->insert_record('quiz_attempts', $data);
}
// Actually getting the SQL to run is quit hard. Do a minimal set up of
// some objects.
$context = context_module::instance($quiz->cmid);
$cm = get_coursemodule_from_id('quiz', $quiz->cmid);
$qmsubselect = quiz_report_qm_filter_select($quiz);
$reportstudents = array($student1->id, $student2->id, $student3->id);
// Set the options.
$reportoptions = new quiz_overview_options('overview', $quiz, $cm, null);
$reportoptions->attempts = quiz_attempts_report::ENROLLED_ALL;
$reportoptions->onlygraded = true;
$reportoptions->states = array(quiz_attempt::IN_PROGRESS, quiz_attempt::OVERDUE, quiz_attempt::FINISHED);
// Now do a minimal set-up of the table class.
$table = new quiz_overview_table($quiz, $context, $qmsubselect, $reportoptions, array(), $reportstudents, array(1), null);
$table->define_columns(array('attempt'));
$table->sortable(true, 'uniqueid');
$table->define_baseurl(new moodle_url('/mod/quiz/report.php'));
$table->setup();
// Run the query.
list($fields, $from, $where, $params) = $table->base_sql($reportstudents);
$table->set_sql($fields, $from, $where, $params);
$table->query_db(30, false);
// Verify what was returned: Student 1's best and in progress attempts.
// Stuent 2's finshed attempt, and Student 3 with no attempt.
// The array key is {student id}#{attempt number}.
$this->assertEquals(4, count($table->rawdata));
$this->assertArrayHasKey($student1->id . '#3', $table->rawdata);
$this->assertEquals(1, $table->rawdata[$student1->id . '#3']->gradedattempt);
$this->assertArrayHasKey($student1->id . '#3', $table->rawdata);
$this->assertEquals(0, $table->rawdata[$student1->id . '#5']->gradedattempt);
$this->assertArrayHasKey($student2->id . '#3', $table->rawdata);
$this->assertEquals(1, $table->rawdata[$student2->id . '#3']->gradedattempt);
$this->assertArrayHasKey($student3->id . '#0', $table->rawdata);
$this->assertEquals(0, $table->rawdata[$student3->id . '#0']->gradedattempt);
}
public function query_db($pagesize, $useinitialsbar = true)
{
parent::query_db($pagesize, $useinitialsbar);
if ($this->quiz->gradebycategory) {
$this->catgrades = new quizaccess_gradebycategory_calculator($this->quiz);
// $this->lateststeps may or may not already have been loaded depending if the reoprt
// is set to show question grades.
if ($this->lateststeps === null) {
$this->catgrades->load_latest_steps($this->attempts);
} else {
$this->catgrades->set_latest_steps($this->lateststeps);
}
$cats = $this->catgrades->load_cat_data();
$this->add_extra_headers($cats);
$this->add_extra_columns(array_keys($cats));
}
}
public function display($quiz, $cm, $course)
{
global $CFG, $DB, $OUTPUT, $PAGE;
list($currentgroup, $students, $groupstudents, $allowed) = $this->init('overview', 'quiz_overview_settings_form', $quiz, $cm, $course);
$options = new quiz_overview_options('overview', $quiz, $cm, $course);
if ($fromform = $this->form->get_data()) {
$options->process_settings_from_form($fromform);
} else {
$options->process_settings_from_params();
}
$this->form->set_data($options->get_initial_form_data());
if ($options->attempts == self::ALL_WITH) {
// This option is only available to users who can access all groups in
// groups mode, so setting allowed to empty (which means all quiz attempts
// are accessible, is not a security porblem.
$allowed = array();
}
// Load the required questions.
$questions = quiz_report_get_significant_questions($quiz);
// Prepare for downloading, if applicable.
$courseshortname = format_string($course->shortname, true, array('context' => context_course::instance($course->id)));
$table = new quiz_overview_table($quiz, $this->context, $this->qmsubselect, $options, $groupstudents, $students, $questions, $options->get_url());
$filename = quiz_report_download_filename(get_string('overviewfilename', 'quiz_overview'), $courseshortname, $quiz->name);
$table->is_downloading($options->download, $filename, $courseshortname . ' ' . format_string($quiz->name, true));
if ($table->is_downloading()) {
raise_memory_limit(MEMORY_EXTRA);
}
$this->course = $course;
// Hack to make this available in process_actions.
$this->process_actions($quiz, $cm, $currentgroup, $groupstudents, $allowed, $options->get_url());
// Start output.
if (!$table->is_downloading()) {
// Only print headers if not asked to download data.
$this->print_header_and_tabs($cm, $course, $quiz, $this->mode);
}
if ($groupmode = groups_get_activity_groupmode($cm)) {
// Groups are being used, so output the group selector if we are not downloading.
if (!$table->is_downloading()) {
groups_print_activity_menu($cm, $options->get_url());
}
}
// Print information on the number of existing attempts.
if (!$table->is_downloading()) {
// Do not print notices when downloading.
if ($strattemptnum = quiz_num_attempt_summary($quiz, $cm, true, $currentgroup)) {
echo '<div class="quizattemptcounts">' . $strattemptnum . '</div>';
}
}
$hasquestions = quiz_questions_in_quiz($quiz->questions);
if (!$table->is_downloading()) {
if (!$hasquestions) {
echo quiz_no_questions_message($quiz, $cm, $this->context);
} else {
if (!$students) {
echo $OUTPUT->notification(get_string('nostudentsyet'));
} else {
if ($currentgroup && !$groupstudents) {
echo $OUTPUT->notification(get_string('nostudentsingroup'));
}
}
}
// Print the display options.
$this->form->display();
}
$hasstudents = $students && (!$currentgroup || $groupstudents);
if ($hasquestions && ($hasstudents || $options->attempts == self::ALL_WITH)) {
// Construct the SQL.
$fields = $DB->sql_concat('u.id', "'#'", 'COALESCE(quiza.attempt, 0)') . ' AS uniqueid, ';
if ($this->qmsubselect) {
$fields .= "(CASE " . " WHEN {$this->qmsubselect} THEN 1" . " ELSE 0 " . "END) AS gradedattempt, ";
}
list($fields, $from, $where, $params) = $table->base_sql($allowed);
$table->set_count_sql("SELECT COUNT(1) FROM {$from} WHERE {$where}", $params);
// Test to see if there are any regraded attempts to be listed.
$fields .= ", COALESCE((\n SELECT MAX(qqr.regraded)\n FROM {quiz_overview_regrades} qqr\n WHERE qqr.questionusageid = quiza.uniqueid\n ), -1) AS regraded";
if ($options->onlyregraded) {
$where .= " AND COALESCE((\n SELECT MAX(qqr.regraded)\n FROM {quiz_overview_regrades} qqr\n WHERE qqr.questionusageid = quiza.uniqueid\n ), -1) <> -1";
}
$table->set_sql($fields, $from, $where, $params);
if (!$table->is_downloading()) {
// Output the regrade buttons.
if (has_capability('mod/quiz:regrade', $this->context)) {
$regradesneeded = $this->count_question_attempts_needing_regrade($quiz, $groupstudents);
if ($currentgroup) {
$a = new stdClass();
$a->groupname = groups_get_group_name($currentgroup);
$a->coursestudents = get_string('participants');
$a->countregradeneeded = $regradesneeded;
$regradealldrydolabel = get_string('regradealldrydogroup', 'quiz_overview', $a);
$regradealldrylabel = get_string('regradealldrygroup', 'quiz_overview', $a);
$regradealllabel = get_string('regradeallgroup', 'quiz_overview', $a);
} else {
$regradealldrydolabel = get_string('regradealldrydo', 'quiz_overview', $regradesneeded);
$regradealldrylabel = get_string('regradealldry', 'quiz_overview');
$regradealllabel = get_string('regradeall', 'quiz_overview');
}
$displayurl = new moodle_url($options->get_url(), array('sesskey' => sesskey()));
echo '<div class="mdl-align">';
echo '<form action="' . $displayurl->out_omit_querystring() . '">';
echo '<div>';
echo html_writer::input_hidden_params($displayurl);
echo '<input type="submit" name="regradeall" value="' . $regradealllabel . '"/>';
echo '<input type="submit" name="regradealldry" value="' . $regradealldrylabel . '"/>';
if ($regradesneeded) {
echo '<input type="submit" name="regradealldrydo" value="' . $regradealldrydolabel . '"/>';
}
echo '</div>';
echo '</form>';
echo '</div>';
}
// Print information on the grading method.
if ($strattempthighlight = quiz_report_highlighting_grading_method($quiz, $this->qmsubselect, $options->onlygraded)) {
echo '<div class="quizattemptcounts">' . $strattempthighlight . '</div>';
}
}
// Define table columns.
$columns = array();
$headers = array();
if (!$table->is_downloading() && $options->checkboxcolumn) {
$columns[] = 'checkbox';
$headers[] = null;
}
$this->add_user_columns($table, $columns, $headers);
$this->add_state_column($columns, $headers);
$this->add_time_columns($columns, $headers);
$this->add_grade_columns($quiz, $options->usercanseegrades, $columns, $headers, false);
if (!$table->is_downloading() && has_capability('mod/quiz:regrade', $this->context) && $this->has_regraded_questions($from, $where, $params)) {
$columns[] = 'regraded';
$headers[] = get_string('regrade', 'quiz_overview');
}
if ($options->slotmarks) {
foreach ($questions as $slot => $question) {
// Ignore questions of zero length.
$columns[] = 'qsgrade' . $slot;
$header = get_string('qbrief', 'quiz', $question->number);
if (!$table->is_downloading()) {
$header .= '<br />';
} else {
$header .= ' ';
}
$header .= '/' . quiz_rescale_grade($question->maxmark, $quiz, 'question');
$headers[] = $header;
}
}
$this->set_up_table_columns($table, $columns, $headers, $this->get_base_url(), $options, false);
$table->set_attribute('class', 'generaltable generalbox grades');
$table->out($options->pagesize, true);
}
if (!$table->is_downloading() && $options->usercanseegrades) {
$output = $PAGE->get_renderer('mod_quiz');
if ($currentgroup && $groupstudents) {
list($usql, $params) = $DB->get_in_or_equal($groupstudents);
$params[] = $quiz->id;
if ($DB->record_exists_select('quiz_grades', "userid {$usql} AND quiz = ?", $params)) {
$imageurl = new moodle_url('/mod/quiz/report/overview/overviewgraph.php', array('id' => $quiz->id, 'groupid' => $currentgroup));
$graphname = get_string('overviewreportgraphgroup', 'quiz_overview', groups_get_group_name($currentgroup));
echo $output->graph($imageurl, $graphname);
}
}
if ($DB->record_exists('quiz_grades', array('quiz' => $quiz->id))) {
$imageurl = new moodle_url('/mod/quiz/report/overview/overviewgraph.php', array('id' => $quiz->id));
$graphname = get_string('overviewreportgraph', 'quiz_overview');
echo $output->graph($imageurl, $graphname);
}
}
return true;
}
public function display($quiz, $cm, $course) {
global $CFG, $COURSE, $DB, $OUTPUT;
$this->context = get_context_instance(CONTEXT_MODULE, $cm->id);
$download = optional_param('download', '', PARAM_ALPHA);
list($currentgroup, $students, $groupstudents, $allowed) =
$this->load_relevant_students($cm, $course);
$pageoptions = array();
$pageoptions['id'] = $cm->id;
$pageoptions['mode'] = 'overview';
$reporturl = new moodle_url('/mod/quiz/report.php', $pageoptions);
$qmsubselect = quiz_report_qm_filter_select($quiz);
$mform = new mod_quiz_report_overview_settings($reporturl,
array('qmsubselect' => $qmsubselect, 'quiz' => $quiz,
'currentgroup' => $currentgroup, 'context' => $this->context));
if ($fromform = $mform->get_data()) {
$regradeall = false;
$regradealldry = false;
$regradealldrydo = false;
$attemptsmode = $fromform->attemptsmode;
if ($qmsubselect) {
$qmfilter = $fromform->qmfilter;
} else {
$qmfilter = 0;
}
$regradefilter = !empty($fromform->regradefilter);
set_user_preference('quiz_report_overview_detailedmarks', $fromform->detailedmarks);
set_user_preference('quiz_report_pagesize', $fromform->pagesize);
$detailedmarks = $fromform->detailedmarks;
$pagesize = $fromform->pagesize;
} else {
$regradeall = optional_param('regradeall', 0, PARAM_BOOL);
$regradealldry = optional_param('regradealldry', 0, PARAM_BOOL);
$regradealldrydo = optional_param('regradealldrydo', 0, PARAM_BOOL);
$attemptsmode = optional_param('attemptsmode', null, PARAM_INT);
if ($qmsubselect) {
$qmfilter = optional_param('qmfilter', 0, PARAM_INT);
} else {
$qmfilter = 0;
}
$regradefilter = optional_param('regradefilter', 0, PARAM_INT);
$detailedmarks = get_user_preferences('quiz_report_overview_detailedmarks', 1);
$pagesize = get_user_preferences('quiz_report_pagesize', 0);
}
$this->validate_common_options($attemptsmode, $pagesize, $course, $currentgroup);
$displayoptions = array();
$displayoptions['attemptsmode'] = $attemptsmode;
$displayoptions['qmfilter'] = $qmfilter;
$displayoptions['regradefilter'] = $regradefilter;
$mform->set_data($displayoptions +
array('detailedmarks' => $detailedmarks, 'pagesize' => $pagesize));
if (!$this->should_show_grades($quiz)) {
$detailedmarks = 0;
}
// We only want to show the checkbox to delete attempts
// if the user has permissions and if the report mode is showing attempts.
$includecheckboxes = has_any_capability(
array('mod/quiz:regrade', 'mod/quiz:deleteattempts'), $this->context)
&& ($attemptsmode != QUIZ_REPORT_ATTEMPTS_STUDENTS_WITH_NO);
if ($attemptsmode == QUIZ_REPORT_ATTEMPTS_ALL) {
// This option is only available to users who can access all groups in
// groups mode, so setting allowed to empty (which means all quiz attempts
// are accessible, is not a security porblem.
$allowed = array();
}
$coursecontext = get_context_instance(CONTEXT_COURSE, $course->id);
$courseshortname = format_string($course->shortname, true,
array('context' => $coursecontext));
$displaycoursecontext = get_context_instance(CONTEXT_COURSE, $COURSE->id);
$displaycourseshortname = format_string($COURSE->shortname, true,
array('context' => $displaycoursecontext));
// Load the required questions.
$questions = quiz_report_get_significant_questions($quiz);
$table = new quiz_overview_table($quiz, $this->context, $qmsubselect,
$qmfilter, $attemptsmode, $groupstudents, $students, $detailedmarks,
$questions, $includecheckboxes, $reporturl, $displayoptions);
$filename = quiz_report_download_filename(get_string('overviewfilename', 'quiz_overview'),
$courseshortname, $quiz->name);
$table->is_downloading($download, $filename,
$displaycourseshortname . ' ' . format_string($quiz->name, true));
if ($table->is_downloading()) {
raise_memory_limit(MEMORY_EXTRA);
}
// Process actions.
if (empty($currentgroup) || $groupstudents) {
if (optional_param('delete', 0, PARAM_BOOL) && confirm_sesskey()) {
if ($attemptids = optional_param_array('attemptid', array(), PARAM_INT)) {
require_capability('mod/quiz:deleteattempts', $this->context);
$this->delete_selected_attempts($quiz, $cm, $attemptids, $allowed);
redirect($reporturl->out(false, $displayoptions));
}
} else if (optional_param('regrade', 0, PARAM_BOOL) && confirm_sesskey()) {
if ($attemptids = optional_param_array('attemptid', array(), PARAM_INT)) {
require_capability('mod/quiz:regrade', $this->context);
$this->regrade_attempts($quiz, false, $groupstudents, $attemptids);
redirect($reporturl->out(false, $displayoptions));
}
}
}
if ($regradeall && confirm_sesskey()) {
require_capability('mod/quiz:regrade', $this->context);
$this->regrade_attempts($quiz, false, $groupstudents);
redirect($reporturl->out(false, $displayoptions), '', 5);
} else if ($regradealldry && confirm_sesskey()) {
require_capability('mod/quiz:regrade', $this->context);
$this->regrade_attempts($quiz, true, $groupstudents);
redirect($reporturl->out(false, $displayoptions), '', 5);
} else if ($regradealldrydo && confirm_sesskey()) {
require_capability('mod/quiz:regrade', $this->context);
$this->regrade_attempts_needing_it($quiz, $groupstudents);
redirect($reporturl->out(false, $displayoptions), '', 5);
}
// Start output.
if (!$table->is_downloading()) {
// Only print headers if not asked to download data
$this->print_header_and_tabs($cm, $course, $quiz, 'overview');
}
if ($groupmode = groups_get_activity_groupmode($cm)) { // Groups are being used
if (!$table->is_downloading()) {
groups_print_activity_menu($cm, $reporturl->out(true, $displayoptions));
}
}
// Print information on the number of existing attempts
if (!$table->is_downloading()) { //do not print notices when downloading
if ($strattemptnum = quiz_num_attempt_summary($quiz, $cm, true, $currentgroup)) {
echo '<div class="quizattemptcounts">' . $strattemptnum . '</div>';
}
}
$hasquestions = quiz_questions_in_quiz($quiz->questions);
if (!$table->is_downloading()) {
if (!$hasquestions) {
echo quiz_no_questions_message($quiz, $cm, $this->context);
} else if (!$students) {
echo $OUTPUT->notification(get_string('nostudentsyet'));
} else if ($currentgroup && !$groupstudents) {
echo $OUTPUT->notification(get_string('nostudentsingroup'));
}
// Print display options
$mform->display();
}
$hasstudents = $students && (!$currentgroup || $groupstudents);
if ($hasquestions && ($hasstudents || ($attemptsmode == QUIZ_REPORT_ATTEMPTS_ALL))) {
// Construct the SQL
$fields = $DB->sql_concat('u.id', "'#'", 'COALESCE(quiza.attempt, 0)') .
' AS uniqueid, ';
if ($qmsubselect) {
$fields .=
"(CASE " .
" WHEN $qmsubselect THEN 1" .
" ELSE 0 " .
"END) AS gradedattempt, ";
}
list($fields, $from, $where, $params) = $table->base_sql($allowed);
$table->set_count_sql("SELECT COUNT(1) FROM $from WHERE $where", $params);
// Test to see if there are any regraded attempts to be listed.
$fields .= ", COALESCE((
SELECT MAX(qqr.regraded)
FROM {quiz_overview_regrades} qqr
WHERE qqr.questionusageid = quiza.uniqueid
), -1) AS regraded";
if ($regradefilter) {
$where .= " AND COALESCE((
SELECT MAX(qqr.regraded)
FROM {quiz_overview_regrades} qqr
WHERE qqr.questionusageid = quiza.uniqueid
), -1) <> -1";
}
$table->set_sql($fields, $from, $where, $params);
if (!$table->is_downloading()) {
// Regrade buttons
if (has_capability('mod/quiz:regrade', $this->context)) {
$regradesneeded = $this->count_question_attempts_needing_regrade(
$quiz, $groupstudents);
if ($currentgroup) {
$a= new stdClass();
$a->groupname = groups_get_group_name($currentgroup);
$a->coursestudents = get_string('participants');
$a->countregradeneeded = $regradesneeded;
$regradealldrydolabel =
get_string('regradealldrydogroup', 'quiz_overview', $a);
$regradealldrylabel =
get_string('regradealldrygroup', 'quiz_overview', $a);
$regradealllabel =
get_string('regradeallgroup', 'quiz_overview', $a);
} else {
$regradealldrydolabel =
get_string('regradealldrydo', 'quiz_overview', $regradesneeded);
$regradealldrylabel =
get_string('regradealldry', 'quiz_overview');
$regradealllabel =
get_string('regradeall', 'quiz_overview');
}
$displayurl = new moodle_url($reporturl,
$displayoptions + array('sesskey' => sesskey()));
echo '<div class="mdl-align">';
echo '<form action="'.$displayurl->out_omit_querystring().'">';
echo '<div>';
echo html_writer::input_hidden_params($displayurl);
echo '<input type="submit" name="regradeall" value="'.$regradealllabel.'"/>';
echo '<input type="submit" name="regradealldry" value="' .
$regradealldrylabel . '"/>';
if ($regradesneeded) {
echo '<input type="submit" name="regradealldrydo" value="' .
$regradealldrydolabel . '"/>';
}
echo '</div>';
echo '</form>';
echo '</div>';
}
// Print information on the grading method
if ($strattempthighlight = quiz_report_highlighting_grading_method(
$quiz, $qmsubselect, $qmfilter)) {
echo '<div class="quizattemptcounts">' . $strattempthighlight . '</div>';
}
}
// Define table columns
$columns = array();
$headers = array();
if (!$table->is_downloading() && $includecheckboxes) {
$columns[] = 'checkbox';
$headers[] = null;
}
$this->add_user_columns($table, $columns, $headers);
$this->add_time_columns($columns, $headers);
if ($detailedmarks) {
foreach ($questions as $slot => $question) {
// Ignore questions of zero length
$columns[] = 'qsgrade' . $slot;
$header = get_string('qbrief', 'quiz', $question->number);
if (!$table->is_downloading()) {
$header .= '<br />';
} else {
$header .= ' ';
}
$header .= '/' . quiz_rescale_grade($question->maxmark, $quiz, 'question');
$headers[] = $header;
}
}
if (!$table->is_downloading() && has_capability('mod/quiz:regrade', $this->context) &&
$this->has_regraded_questions($from, $where, $params)) {
$columns[] = 'regraded';
$headers[] = get_string('regrade', 'quiz_overview');
}
$this->add_grade_columns($quiz, $columns, $headers, false);
$this->set_up_table_columns(
$table, $columns, $headers, $reporturl, $displayoptions, false);
$table->set_attribute('class', 'generaltable generalbox grades');
$table->out($pagesize, true);
}
if (!$table->is_downloading() && $this->should_show_grades($quiz)) {
if ($currentgroup && $groupstudents) {
list($usql, $params) = $DB->get_in_or_equal($groupstudents);
$params[] = $quiz->id;
if ($DB->record_exists_select('quiz_grades', "userid $usql AND quiz = ?",
$params)) {
$imageurl = new moodle_url('/mod/quiz/report/overview/overviewgraph.php',
array('id' => $quiz->id, 'groupid' => $currentgroup));
$graphname = get_string('overviewreportgraphgroup', 'quiz_overview',
groups_get_group_name($currentgroup));
echo $OUTPUT->heading($graphname);
echo html_writer::tag('div', html_writer::empty_tag('img',
array('src' => $imageurl, 'alt' => $graphname)),
array('class' => 'graph'));
}
}
if ($DB->record_exists('quiz_grades', array('quiz'=> $quiz->id))) {
$graphname = get_string('overviewreportgraph', 'quiz_overview');
$imageurl = new moodle_url('/mod/quiz/report/overview/overviewgraph.php',
array('id' => $quiz->id));
echo $OUTPUT->heading($graphname);
echo html_writer::tag('div', html_writer::empty_tag('img',
array('src' => $imageurl, 'alt' => $graphname)),
array('class' => 'graph'));
}
}
return true;
}
