PHP quiz_add_quiz_question函數代碼示例

 public function test_quiz_report_overview_report_forcesubmit_specific_attempt()
 {
     global $DB;
     $this->resetAfterTest();
     $generator = $this->getDataGenerator();
     $quizgenerator = $generator->get_plugin_generator('mod_quiz');
     $questiongenerator = $generator->get_plugin_generator('core_question');
     // Make a user to do the quiz.
     $user1 = $generator->create_user();
     $user2 = $generator->create_user();
     $user3 = $generator->create_user();
     // Create our course.
     $course = $generator->create_course(array('visible' => true));
     // Create the quiz.
     $quiz = $quizgenerator->create_instance(array('course' => $course->id, 'visible' => true, 'questionsperpage' => 0, 'grade' => 100.0, 'sumgrades' => 2));
     // Create two questions.
     $cat = $questiongenerator->create_question_category();
     $saq = $questiongenerator->create_question('shortanswer', null, array('category' => $cat->id));
     $numq = $questiongenerator->create_question('numerical', null, array('category' => $cat->id));
     // Add the questions to the quiz.
     quiz_add_quiz_question($saq->id, $quiz);
     quiz_add_quiz_question($numq->id, $quiz);
     // Get a quiz object with user access overrides.
     $quizobj = quiz::create($quiz->id, $user1->id);
     $quizobj2 = quiz::create($quiz->id, $user2->id);
     $quizobj3 = quiz::create($quiz->id, $user3->id);
     // Start the attempt.
     $quba = question_engine::make_questions_usage_by_activity('mod_quiz', $quizobj->get_context());
     $quba->set_preferred_behaviour($quizobj->get_quiz()->preferredbehaviour);
     $quba2 = question_engine::make_questions_usage_by_activity('mod_quiz', $quizobj2->get_context());
     $quba2->set_preferred_behaviour($quizobj2->get_quiz()->preferredbehaviour);
     $quba3 = question_engine::make_questions_usage_by_activity('mod_quiz', $quizobj3->get_context());
     $quba3->set_preferred_behaviour($quizobj3->get_quiz()->preferredbehaviour);
     // Create a quiz attempt.
     $timenow = time();
     $attempt = quiz_create_attempt($quizobj, 1, false, $timenow, false, $user1->id);
     $attempt2 = quiz_create_attempt($quizobj2, 1, false, $timenow, false, $user2->id);
     $attempt3 = quiz_create_attempt($quizobj3, 1, false, $timenow, false, $user3->id);
     // Start the attempt.
     quiz_start_new_attempt($quizobj, $quba, $attempt, 1, $timenow);
     quiz_attempt_save_started($quizobj, $quba, $attempt);
     quiz_start_new_attempt($quizobj2, $quba2, $attempt2, 1, $timenow);
     quiz_attempt_save_started($quizobj2, $quba2, $attempt2);
     quiz_start_new_attempt($quizobj3, $quba3, $attempt3, 1, $timenow);
     quiz_attempt_save_started($quizobj3, $quba3, $attempt3);
     // Answer first question and set it overdue.
     $tosubmit = array(1 => array('answer' => 'frog'));
     $tosubmit2 = array(1 => array('answer' => 'tiger'));
     $tosubmit3 = array(1 => array('answer' => 'tiger'));
     $attemptobj = quiz_attempt::create($attempt->id);
     $attemptobj->process_submitted_actions($timenow, true, $tosubmit);
     $attemptobj2 = quiz_attempt::create($attempt2->id);
     $attemptobj2->process_submitted_actions($timenow, true, $tosubmit2);
     $attemptobj3 = quiz_attempt::create($attempt3->id);
     $attemptobj3->process_submitted_actions($timenow, true, $tosubmit3);
     // Finish the attempt.
     $attemptobj = quiz_attempt::create($attempt->id);
     $this->assertTrue($attemptobj->has_response_to_at_least_one_graded_question());
     $attemptobj->process_abandon($timenow, false);
     // Re-load quiz attempt2 data.
     $attemptobj = quiz_attempt::create($attempt->id);
     $attemptobj2 = quiz_attempt::create($attempt2->id);
     $attemptobj3 = quiz_attempt::create($attempt3->id);
     // Check that the state of the attempt is as expected.
     $this->assertEquals(1, $attemptobj->get_attempt_number());
     $this->assertEquals(quiz_attempt::ABANDONED, $attemptobj->get_state());
     $this->assertEquals($user1->id, $attemptobj->get_userid());
     $this->assertTrue($attemptobj->has_response_to_at_least_one_graded_question());
     // Check that the state of the attempt2 is as expected.
     $this->assertEquals(1, $attemptobj2->get_attempt_number());
     $this->assertEquals(quiz_attempt::OVERDUE, $attemptobj2->get_state());
     $this->assertEquals($user2->id, $attemptobj2->get_userid());
     $this->assertTrue($attemptobj2->has_response_to_at_least_one_graded_question());
     // Check that the state of the attempt3 is as expected.
     $this->assertEquals(1, $attemptobj3->get_attempt_number());
     $this->assertEquals(quiz_attempt::OVERDUE, $attemptobj3->get_state());
     $this->assertEquals($user3->id, $attemptobj3->get_userid());
     $this->assertTrue($attemptobj3->has_response_to_at_least_one_graded_question());
     // Force submit the attempts.
     $overviewreport = new quiz_overview_report_testable();
     $overviewreport->forcesubmit_attempts($quiz, false, array(), array($attempt->id, $attempt3->id));
     // Check that it is now finished.
     $attemptobj = quiz_attempt::create($attempt->id);
     $this->assertEquals(quiz_attempt::FINISHED, $attemptobj->get_state());
     $attemptobj2 = quiz_attempt::create($attempt2->id);
     $this->assertEquals(quiz_attempt::OVERDUE, $attemptobj2->get_state());
     $attemptobj3 = quiz_attempt::create($attempt3->id);
     $this->assertEquals(quiz_attempt::FINISHED, $attemptobj3->get_state());
 }

 /**
  * Put the specified questions on the specified pages of a given quiz.
  *
  * Give the question name in the first column, and that page number in the
  * second column. You may optionally give the desired maximum mark for each
  * question in a third column.
  *
  * @param string $quizname the name of the quiz to add questions to.
  * @param TableNode $data information about the questions to add.
  *
  * @Given /^quiz "([^"]*)" contains the following questions:$/
  */
 public function quiz_contains_the_following_questions($quizname, TableNode $data)
 {
     global $DB;
     $quiz = $DB->get_record('quiz', array('name' => $quizname), '*', MUST_EXIST);
     // The action depends on the field type.
     foreach ($data->getRows() as $questiondata) {
         if (count($questiondata) < 2 || count($questiondata) > 3) {
             throw new ExpectationException('When adding questions to a quiz, you should give 2 or three 3 things: ' . ' the question name, the page number, and optionally a the maxiumum mark. ' . count($questiondata) . ' values passed.', $this->getSession());
         }
         list($questionname, $rawpage) = $questiondata;
         if (!isset($questiondata[2]) || $questiondata[2] === '') {
             $maxmark = null;
         } else {
             $maxmark = clean_param($questiondata[2], PARAM_FLOAT);
             if (!is_numeric($questiondata[2]) || $maxmark < 0) {
                 throw new ExpectationException('When adding questions to a quiz, the max mark must be a positive number.', $this->getSession());
             }
         }
         $page = clean_param($rawpage, PARAM_INT);
         if ($page <= 0 || (string) $page !== $rawpage) {
             throw new ExpectationException('When adding questions to a quiz, the page number must be a positive integer.', $this->getSession());
         }
         $questionid = $DB->get_field('question', 'id', array('name' => $questionname), MUST_EXIST);
         quiz_add_quiz_question($questionid, $quiz, $page, $maxmark);
     }
     quiz_update_sumgrades($quiz);
 }

 protected function prepare_quiz_data()
 {
     $this->resetAfterTest(true);
     // Create a course
     $course = $this->getDataGenerator()->create_course();
     // Make a quiz.
     $quizgenerator = $this->getDataGenerator()->get_plugin_generator('mod_quiz');
     $quiz = $quizgenerator->create_instance(array('course' => $course->id, 'questionsperpage' => 0, 'grade' => 100.0, 'sumgrades' => 2));
     $cm = get_coursemodule_from_instance('quiz', $quiz->id, $course->id);
     // Create a couple of questions.
     $questiongenerator = $this->getDataGenerator()->get_plugin_generator('core_question');
     $cat = $questiongenerator->create_question_category();
     $saq = $questiongenerator->create_question('shortanswer', null, array('category' => $cat->id));
     $numq = $questiongenerator->create_question('numerical', null, array('category' => $cat->id));
     // Add them to the quiz.
     quiz_add_quiz_question($saq->id, $quiz);
     quiz_add_quiz_question($numq->id, $quiz);
     // Make a user to do the quiz.
     $user1 = $this->getDataGenerator()->create_user();
     $this->setUser($user1);
     $quizobj = quiz::create($quiz->id, $user1->id);
     // Start the attempt.
     $quba = question_engine::make_questions_usage_by_activity('mod_quiz', $quizobj->get_context());
     $quba->set_preferred_behaviour($quizobj->get_quiz()->preferredbehaviour);
     $timenow = time();
     $attempt = quiz_create_attempt($quizobj, 1, false, $timenow);
     quiz_start_new_attempt($quizobj, $quba, $attempt, 1, $timenow);
     quiz_attempt_save_started($quizobj, $quba, $attempt);
     return array($quizobj, $quba, $attempt);
 }

 /**
  * Utility method to add a quiz to a course.
  * @param $course
  * @return testable_assign
  */
 private function add_quiz_to_course($course)
 {
     // Add a quiz to the course.
     $quizgenerator = $this->getDataGenerator()->get_plugin_generator('mod_quiz');
     $quiz = $quizgenerator->create_instance(array('course' => $course->id, 'questionsperpage' => 0, 'grade' => 100.0, 'sumgrades' => 2));
     // Create a couple of questions using test data in mod_quiz.
     $questiongenerator = $this->getDataGenerator()->get_plugin_generator('core_question');
     $cat = $questiongenerator->create_question_category();
     $saq = $questiongenerator->create_question('shortanswer', null, array('category' => $cat->id));
     $numq = $questiongenerator->create_question('numerical', null, array('category' => $cat->id));
     // Add them to the quiz.
     quiz_add_quiz_question($saq->id, $quiz);
     quiz_add_quiz_question($numq->id, $quiz);
     return $quiz;
 }

 /**
  * Setup a course, a quiz, a question category and a question for testing.
  *
  * @param string $type The type of question category to create.
  * @return array The created data objects
  */
 public function setup_quiz_and_questions($type = 'module')
 {
     // Create course category.
     $category = $this->getDataGenerator()->create_category();
     // Create course.
     $course = $this->getDataGenerator()->create_course(array('numsections' => 5));
     $options = array('course' => $course->id, 'duedate' => time());
     // Generate an assignment with due date (will generate a course event).
     $quiz = $this->getDataGenerator()->create_module('quiz', $options);
     $qgen = $this->getDataGenerator()->get_plugin_generator('core_question');
     if ('course' == $type) {
         $context = context_course::instance($course->id);
     } else {
         if ('category' == $type) {
             $context = context_coursecat::instance($category->id);
         } else {
             $context = context_module::instance($quiz->cmid);
         }
     }
     $qcat = $qgen->create_question_category(array('contextid' => $context->id));
     $questions = array($qgen->create_question('shortanswer', null, array('category' => $qcat->id)), $qgen->create_question('shortanswer', null, array('category' => $qcat->id)));
     quiz_add_quiz_question($questions[0]->id, $quiz);
     return array($category, $course, $quiz, $qcat, $questions);
 }

        // on whether to include questions in subcategories
        $form->questiontextformat = 0;
        $form->image = '';
        $form->defaultgrade = 1;
        $form->hidden = 1;
        for ($i = 0; $i < $randomcount; $i++) {
            $form->category = "{$category->id},{$category->contextid}";
            $form->stamp = make_unique_id_code();
            // Set the unique code (not to be changed)
            $question = new stdClass();
            $question->qtype = RANDOM;
            $question = $QTYPES[RANDOM]->save_question($question, $form, $course);
            if (!isset($question->id)) {
                error('Could not insert new random question!');
            }
            quiz_add_quiz_question($question->id, $quiz);
        }
    }
    $significantchangemade = true;
}
if (optional_param('repaginate', false, PARAM_BOOL) and confirm_sesskey()) {
    /// Re-paginate the quiz
    $questionsperpage = optional_param('questionsperpage', $quiz->questionsperpage, PARAM_INT);
    if ($questionsperpage != $quiz->questionsperpage) {
        $quiz->questionsperpage = $questionsperpage;
        if (!set_field('quiz', 'questionsperpage', $quiz->questionsperpage, 'id', $quiz->id)) {
            error('Could not save number of questions per page');
        }
    }
    $quiz->questions = quiz_repaginate($quiz->questions, $quiz->questionsperpage);
    if (!set_field('quiz', 'questions', $quiz->questions, 'id', $quiz->id)) {

             $questions[$courseid][] = $question->generate_test("question{$qtype}-{$i}", $courseid);
             verbose("Generated a question of type {$qtype} for course id {$courseid}.");
         }
     }
     // Assign questions to quizzes, if such exist
     if (!empty($quizzes) && !empty($questions) && !empty($settings['questions-per-quiz'])) {
         // Cannot assign more questions per quiz than are available, so determine which is the largest
         $questions_per_quiz = max(count($questions), $settings['questions-per-quiz']);
         foreach ($quizzes as $quiz) {
             $questions_added = array();
             for ($i = 0; $i < $questions_per_quiz; $i++) {
                 // Add a random question to the quiz
                 do {
                     $random = rand(0, count($questions[$quiz->course]));
                 } while (in_array($random, $questions_added) || !array_key_exists($random, $questions[$quiz->course]));
                 if (!quiz_add_quiz_question($questions[$quiz->course][$random]->id, $quiz)) {
                     // Could not add question to quiz!! report error
                     echo "WARNING: Could not add question id {$random} to quiz id {$quiz->id}{$settings['eolchar']}";
                 } else {
                     verbose("Adding question id {$random} to quiz id {$quiz->id}.");
                     $questions_added[] = $random;
                 }
             }
         }
     }
 }
 /**
  * ROLE ASSIGNMENTS
  */
 if (count($courses) > 0) {
     verbose("Inserting student->course role assignments...");

        $form->questiontextformat = 0;
        $form->image = '';
        $form->defaultgrade = 1;
        $form->hidden = 1;
        for ($i = 0; $i < $randomcount; $i++) {
            $form->category = $category->id . ',' . $category->contextid;
            $form->stamp = make_unique_id_code();
            // Set the unique
            //code (not to be changed)
            $question = new stdClass();
            $question->qtype = RANDOM;
            $question = $QTYPES[RANDOM]->save_question($question, $form, $course);
            if (!isset($question->id)) {
                print_error('cannotinsertrandomquestion', 'quiz');
            }
            quiz_add_quiz_question($question->id, $quiz, $addonpage);
        }
    }
    quiz_update_sumgrades($quiz);
    quiz_delete_previews($quiz);
    redirect($thispageurl->out());
}
if (optional_param('addnewpagesafterselected', null) && !empty($selectedquestionids) && confirm_sesskey()) {
    foreach ($selectedquestionids as $questionid) {
        $quiz->questions = quiz_add_page_break_after($quiz->questions, $questionid);
    }
    quiz_save_new_layout($quiz);
    redirect($thispageurl->out());
}
$addpage = optional_param('addpage', false, PARAM_INT);
if ($addpage !== false && confirm_sesskey()) {

 /**
  * This adds a particular question to the supplied quiz. Based on /mod/quiz/edit.php
  *
  * @param int $questionid
  * @param stdClass $quiz
  * @return void
  */
 public function add_question_to_quiz($questionid, $quiz)
 {
     quiz_require_question_use($questionid);
     quiz_add_quiz_question($questionid, $quiz, 0);
     quiz_delete_previews($quiz);
     quiz_update_sumgrades($quiz);
 }

 public function test_question_remove_stale_questions_from_category()
 {
     global $DB;
     $this->resetAfterTest(true);
     $dg = $this->getDataGenerator();
     $course = $dg->create_course();
     $quiz = $dg->create_module('quiz', ['course' => $course->id]);
     $qgen = $dg->get_plugin_generator('core_question');
     $context = context_system::instance();
     $qcat1 = $qgen->create_question_category(['contextid' => $context->id]);
     $q1a = $qgen->create_question('shortanswer', null, ['category' => $qcat1->id]);
     // Will be hidden.
     $q1b = $qgen->create_question('random', null, ['category' => $qcat1->id]);
     // Will not be used.
     $DB->set_field('question', 'hidden', 1, ['id' => $q1a->id]);
     $qcat2 = $qgen->create_question_category(['contextid' => $context->id]);
     $q2a = $qgen->create_question('shortanswer', null, ['category' => $qcat2->id]);
     // Will be hidden.
     $q2b = $qgen->create_question('shortanswer', null, ['category' => $qcat2->id]);
     // Will be hidden but used.
     $q2c = $qgen->create_question('random', null, ['category' => $qcat2->id]);
     // Will not be used.
     $q2d = $qgen->create_question('random', null, ['category' => $qcat2->id]);
     // Will be used.
     $DB->set_field('question', 'hidden', 1, ['id' => $q2a->id]);
     $DB->set_field('question', 'hidden', 1, ['id' => $q2b->id]);
     quiz_add_quiz_question($q2b->id, $quiz);
     quiz_add_quiz_question($q2d->id, $quiz);
     $this->assertEquals(2, $DB->count_records('question', ['category' => $qcat1->id]));
     $this->assertEquals(4, $DB->count_records('question', ['category' => $qcat2->id]));
     // Non-existing category, nothing will happen.
     question_remove_stale_questions_from_category(0);
     $this->assertEquals(2, $DB->count_records('question', ['category' => $qcat1->id]));
     $this->assertEquals(4, $DB->count_records('question', ['category' => $qcat2->id]));
     // First category, should be empty afterwards.
     question_remove_stale_questions_from_category($qcat1->id);
     $this->assertEquals(0, $DB->count_records('question', ['category' => $qcat1->id]));
     $this->assertEquals(4, $DB->count_records('question', ['category' => $qcat2->id]));
     $this->assertFalse($DB->record_exists('question', ['id' => $q1a->id]));
     $this->assertFalse($DB->record_exists('question', ['id' => $q1b->id]));
     // Second category, used questions should be left untouched.
     question_remove_stale_questions_from_category($qcat2->id);
     $this->assertEquals(0, $DB->count_records('question', ['category' => $qcat1->id]));
     $this->assertEquals(2, $DB->count_records('question', ['category' => $qcat2->id]));
     $this->assertFalse($DB->record_exists('question', ['id' => $q2a->id]));
     $this->assertTrue($DB->record_exists('question', ['id' => $q2b->id]));
     $this->assertFalse($DB->record_exists('question', ['id' => $q2c->id]));
     $this->assertTrue($DB->record_exists('question', ['id' => $q2d->id]));
 }

 /**
  * Test deleting a quiz instance.
  */
 public function test_quiz_delete_instance()
 {
     global $SITE, $DB;
     $this->resetAfterTest(true);
     $this->setAdminUser();
     // Setup a quiz with 1 standard and 1 random question.
     $quizgenerator = $this->getDataGenerator()->get_plugin_generator('mod_quiz');
     $quiz = $quizgenerator->create_instance(array('course' => $SITE->id, 'questionsperpage' => 3, 'grade' => 100.0));
     $questiongenerator = $this->getDataGenerator()->get_plugin_generator('core_question');
     $cat = $questiongenerator->create_question_category();
     $standardq = $questiongenerator->create_question('shortanswer', null, array('category' => $cat->id));
     quiz_add_quiz_question($standardq->id, $quiz);
     quiz_add_random_questions($quiz, 0, $cat->id, 1, false);
     // Get the random question.
     $randomq = $DB->get_record('question', array('qtype' => 'random'));
     quiz_delete_instance($quiz->id);
     // Check that the random question was deleted.
     $count = $DB->count_records('question', array('id' => $randomq->id));
     $this->assertEquals(0, $count);
     // Check that the standard question was not deleted.
     $count = $DB->count_records('question', array('id' => $standardq->id));
     $this->assertEquals(1, $count);
     // Check that all the slots were removed.
     $count = $DB->count_records('quiz_slots', array('quizid' => $quiz->id));
     $this->assertEquals(0, $count);
     // Check that the quiz was removed.
     $count = $DB->count_records('quiz', array('id' => $quiz->id));
     $this->assertEquals(0, $count);
 }

    /**
     * Create a quiz, add five questions to the quiz
     * which are all on one page and return the quiz object.
     */
    private function get_quiz_object() {
        global $SITE;
        $this->resetAfterTest(true);

        // Make a quiz.
        $quizgenerator = $this->getDataGenerator()->get_plugin_generator('mod_quiz');

        $quiz = $quizgenerator->create_instance(array(
                'course' => $SITE->id, 'questionsperpage' => 0, 'grade' => 100.0, 'sumgrades' => 2));

        // Create five questions.
        $questiongenerator = $this->getDataGenerator()->get_plugin_generator('core_question');
        $cat = $questiongenerator->create_question_category();

        $shortanswer = $questiongenerator->create_question('shortanswer', null, array('category' => $cat->id));
        $numerical = $questiongenerator->create_question('numerical', null, array('category' => $cat->id));
        $essay = $questiongenerator->create_question('essay', null, array('category' => $cat->id));
        $truefalse = $questiongenerator->create_question('truefalse', null, array('category' => $cat->id));
        $match = $questiongenerator->create_question('match', null, array('category' => $cat->id));

        // Add them to the quiz.
        quiz_add_quiz_question($shortanswer->id, $quiz);
        quiz_add_quiz_question($numerical->id, $quiz);
        quiz_add_quiz_question($essay->id, $quiz);
        quiz_add_quiz_question($truefalse->id, $quiz);
        quiz_add_quiz_question($match->id, $quiz);

        // Return the quiz object.
        return \mod_quiz\structure::create_for($quiz);
    }

 public function generate_questions($courses, $modules)
 {
     global $DB, $CFG;
     if (!is_null($this->get('questions_per_course')) && count($courses) > 0 && is_array($courses)) {
         require_once $CFG->libdir . '/questionlib.php';
         require_once $CFG->dirroot . '/mod/quiz/editlib.php';
         $questions = array();
         $questionsmenu = question_type_menu();
         $questiontypes = array();
         foreach ($questionsmenu as $qtype => $qname) {
             $questiontypes[] = $qtype;
         }
         // Add the questions
         foreach ($courses as $courseid) {
             $questions[$courseid] = array();
             for ($i = 0; $i < $this->get('questions_per_course'); $i++) {
                 $qtype = $questiontypes[array_rand($questiontypes)];
                 // Only the following types are supported right now. Hang around for more!
                 $supported_types = array('match', 'essay', 'multianswer', 'multichoice', 'shortanswer', 'numerical', 'truefalse', 'calculated');
                 $qtype = $supported_types[array_rand($supported_types)];
                 if ($qtype == 'calculated') {
                     continue;
                 }
                 $classname = "question_{$qtype}_qtype";
                 if ($qtype == 'multianswer') {
                     $classname = "embedded_cloze_qtype";
                 }
                 $question = new $classname();
                 $question->qtype = $qtype;
                 $questions[$courseid][] = $question->generate_test("question{$qtype}-{$i}", $courseid);
                 $this->verbose("Generated a question of type {$qtype} for course id {$courseid}.");
             }
         }
         // Assign questions to quizzes, if such exist
         if (!empty($modules['quiz']) && !empty($questions) && !is_null($this->get('questions_per_quiz'))) {
             $quizzes = $modules['quiz'];
             // Cannot assign more questions per quiz than are available, so determine which is the largest
             $questions_per_quiz = max(count($questions), $this->get('questions_per_quiz'));
             foreach ($quizzes as $quiz) {
                 $questions_added = array();
                 for ($i = 0; $i < $questions_per_quiz; $i++) {
                     // Add a random question to the quiz
                     do {
                         if (empty($quiz->course)) {
                             print_object($quizzes);
                             die;
                         }
                         $random = rand(0, count($questions[$quiz->course]));
                     } while (in_array($random, $questions_added) || !array_key_exists($random, $questions[$quiz->course]));
                     if (!quiz_add_quiz_question($questions[$quiz->course][$random]->id, $quiz)) {
                         // Could not add question to quiz!! report error
                         if (!$this->get('quiet')) {
                             echo "WARNING: Could not add question id {$random} to quiz id {$quiz->id}{$this->eolchar}";
                         }
                     } else {
                         $this->verbose("Adding question id {$random} to quiz id {$quiz->id}.");
                         $questions_added[] = $random;
                     }
                 }
             }
         }
         return $questions;
     }
     return null;
 }

    quiz_delete_previews($quiz);
    quiz_update_sumgrades($quiz);
    $thispageurl->param('lastchanged', $addquestion);
    redirect($afteractionurl);
}
if (optional_param('add', false, PARAM_BOOL) && confirm_sesskey()) {
    $structure->check_can_be_edited();
    $addonpage = optional_param('addonpage', 0, PARAM_INT);
    // Add selected questions to the current quiz.
    $rawdata = (array) data_submitted();
    foreach ($rawdata as $key => $value) {
        // Parse input for question ids.
        if (preg_match('!^q([0-9]+)$!', $key, $matches)) {
            $key = $matches[1];
            quiz_require_question_use($key);
            quiz_add_quiz_question($key, $quiz, $addonpage);
        }
    }
    quiz_delete_previews($quiz);
    quiz_update_sumgrades($quiz);
    redirect($afteractionurl);
}
if (optional_param('addrandom', false, PARAM_BOOL) && confirm_sesskey()) {
    // Add random questions to the quiz.
    $structure->check_can_be_edited();
    $recurse = optional_param('recurse', 0, PARAM_BOOL);
    $addonpage = optional_param('addonpage', 0, PARAM_INT);
    $categoryid = required_param('categoryid', PARAM_INT);
    $randomcount = required_param('randomcount', PARAM_INT);
    quiz_add_random_questions($quiz, $addonpage, $categoryid, $randomcount, $recurse);
    quiz_delete_previews($quiz);

function addRandomQuizQuestions($cmid, $cat_id)
{
    global $QTYPES;
    $result = true;
    $recurse = 1;
    list($quiz, $cm) = get_module_from_cmid($cmid);
    if ($rs = get_records('question_categories', 'parent', $cat_id, 'sortorder')) {
        $course = get_record('course', 'id', $quiz->course);
        foreach ($rs as $cat) {
            $categoryid = $cat->id;
            $randomcount = 1;
            // load category
            if (!($category = get_record('question_categories', 'id', $categoryid))) {
                error('Category ID is incorrect');
            }
            $catcontext = get_context_instance_by_id($category->contextid);
            require_capability('moodle/question:useall', $catcontext);
            $category->name = addslashes($category->name);
            // Find existing random questions in this category that are not used by any quiz.
            if ($existingquestions = get_records_sql("SELECT * FROM " . $CFG->prefix . "question q\n                        WHERE qtype = '" . RANDOM . "'\n                            AND category = {$category->id}\n                            AND " . sql_compare_text('questiontext') . " = '{$recurse}'\n                            AND NOT EXISTS (SELECT * FROM " . $CFG->prefix . "quiz_question_instances WHERE question = q.id)\n                        ORDER BY id")) {
                // Take as many of these as needed.
                while ($existingquestion = array_shift($existingquestions) and $randomcount > 0) {
                    if (!quiz_add_quiz_question($existingquestion->id, $quiz)) {
                        $result = false;
                    }
                    $randomcount--;
                }
            }
            // If more are needed, create them.
            if ($randomcount > 0) {
                //echo "NOT EXISTING:".$cat->id."<br/>";
                $form->questiontext = $recurse;
                // we use the questiontext field to store the info
                // on whether to include questions in subcategories
                $form->questiontextformat = 0;
                $form->image = '';
                $form->defaultgrade = 1;
                $form->hidden = 1;
                for ($i = 0; $i < $randomcount; $i++) {
                    $form->category = "{$category->id},{$category->contextid}";
                    $form->stamp = make_unique_id_code();
                    // Set the unique code (not to be changed)
                    $question = new stdClass();
                    $question->qtype = RANDOM;
                    $question = $QTYPES[RANDOM]->save_question($question, $form, $course);
                    if (!isset($question->id)) {
                        error('Could not insert new random question!');
                        $result = false;
                    }
                    //quiz_add_quiz_question($question->id, $quiz);
                    if (!quiz_add_quiz_question($question->id, $quiz)) {
                        $result = false;
                    }
                }
            }
            $significantchangemade = true;
        }
    }
    return $result;
    /*
        $result = true;
        $recurse = 1;
       list($quiz, $cm) = get_module_from_cmid($cmid);
       if ($rs = get_recordset('question_categories','parent',$cat_id)) {
               $course = get_record('course','id',$quiz->course);
                foreach ($rs as $category) {
                        echo $category->name."<br/>";
                        /// Add random questions to the quiz
                        // - Source from: /mod/quiz/edit.php
                        $randomcount = 1;
                        // load category
                       //$catcontext = get_context_instance_by_id($category->contextid);
                        //require_capability('moodle/question:useall', $catcontext);
                        $category->name = $category->name;
                        // Find existing random questions in this category that are
                        // not used by any quiz.
                        if ($existingquestions = get_records_sql(
                                "SELECT q.id,q.qtype FROM {question} q
                                WHERE qtype = '" . RANDOM . "'
                                    AND category = ?
                                    AND " . $DB->sql_compare_text('questiontext') . " = ?
                                    AND NOT EXISTS (SELECT * FROM {quiz_question_instances} WHERE question = q.id)
                                ORDER BY id", array($category->id, $recurse))) {
                            // Take as many of these as needed.
                            while (($existingquestion = array_shift($existingquestions)) && $randomcount > 0) {
                                //quiz_add_quiz_question($existingquestion->id, $quiz);
                                if(!quiz_add_quiz_question($existingquestion->id, $quiz)){
                                    $result = false;
                                }
                                $randomcount--;
                            }
                        }
                       // If more are needed, create them.
                        if ($randomcount > 0) {
                           $form->questiontext = $recurse; // we use the questiontext field
                                    // to store the info on whether to include
                                    // questions in subcategories
                            $form->questiontextformat = 0;
                            $form->image = '';
                            $form->defaultgrade = 1;
//.........這裏部分代碼省略.........