mod/quiz/mod_form.php

   1 <?php // $Id$
   2 require_once ($CFG->dirroot.'/course/moodleform_mod.php');
   3
   4 require_once("$CFG->dirroot/mod/quiz/locallib.php");
   5
   6 class mod_quiz_mod_form extends moodleform_mod {
   7     var $_feedbacks;
   8
   9     function definition() {
  10
  11         global $COURSE, $CFG;
  12         $mform    =& $this->_form;
  13
  14 //-------------------------------------------------------------------------------
  15         $mform->addElement('header', 'general', get_string('general', 'form'));
  16
  17         $mform->addElement('text', 'name', get_string('name'), array('size'=>'64'));
  18         $mform->setType('name', PARAM_TEXT);
  19         $mform->addRule('name', null, 'required', null, 'client');
  20
  21         $mform->addElement('htmleditor', 'intro', get_string("introduction", "quiz"));
  22         $mform->setType('intro', PARAM_RAW);
  23         $mform->setHelpButton('intro', array('richtext', get_string('helprichtext')));
  24
  25 //-------------------------------------------------------------------------------
  26         $mform->addElement('header', 'timinghdr', get_string('timing', 'form'));
  27         $mform->addElement('date_time_selector', 'timeopen', get_string("quizopen", "quiz"), array('optional'=>true));
  28         $mform->setHelpButton('timeopen', array('timeopen', get_string('quizopens', 'quiz'), 'quiz'));
  29
  30         $mform->addElement('date_time_selector', 'timeclose', get_string("quizcloses", "quiz"), array('optional'=>true));
  31         $mform->setHelpButton('timeclose', array('timeopen', get_string('quizcloses', 'quiz'), 'quiz'));
  32
  33
  34         $timelimitgrp=array();
  35         $timelimitgrp[] = &$mform->createElement('text', 'timelimit');
  36         $timelimitgrp[] = &$mform->createElement('checkbox', 'timelimitenable', '', get_string('enable'));
  37         $mform->addGroup($timelimitgrp, 'timelimitgrp', get_string('timelimitmin', 'quiz'), array(' '), false);
  38         $mform->setType('timelimit', PARAM_TEXT);
  39         $timelimitgrprules = array();
  40         $timelimitgrprules['timelimit'][] = array(null, 'numeric', null, 'client');
  41         $mform->addGroupRule('timelimitgrp', $timelimitgrprules);
  42         $mform->disabledIf('timelimitgrp', 'timelimitenable');
  43         $mform->setAdvanced('timelimitgrp', $CFG->quiz_fix_timelimit);
  44         $mform->setHelpButton('timelimitgrp', array("timelimit", get_string("quiztimer","quiz"), "quiz"));
  45         $mform->setDefault('timelimit', $CFG->quiz_timelimit);
  46
  47
  48         //enforced time delay between quiz attempts add-on
  49         $timedelayoptions = array();
  50         $timedelayoptions[0] = get_string('none');
  51         $timedelayoptions[1800] = get_string('numminutes', '', 30);
  52         $timedelayoptions[3600] = get_string('numminutes', '', 60);
  53         for($i=2; $i<=23; $i++) {
  54              $seconds  = $i*3600;
  55              $timedelayoptions[$seconds] = get_string('numhours', '', $i);
  56         }
  57         $timedelayoptions[86400] = get_string('numhours', '', 24);
  58         for($i=2; $i<=7; $i++) {
  59              $seconds = $i*86400;
  60              $timedelayoptions[$seconds] = get_string('numdays', '', $i);
  61         }
  62         $mform->addElement('select', 'delay1', get_string("delay1", "quiz"), $timedelayoptions);
  63         $mform->setHelpButton('delay1', array("timedelay1", get_string("delay1", "quiz"), "quiz"));
  64         $mform->setAdvanced('delay1', $CFG->quiz_fix_delay1);
  65         $mform->setDefault('delay1', $CFG->quiz_delay1);
  66
  67         $mform->addElement('select', 'delay2', get_string("delay2", "quiz"), $timedelayoptions);
  68         $mform->setHelpButton('delay2', array("timedelay2", get_string("delay2", "quiz"), "quiz"));
  69         $mform->setAdvanced('delay2', $CFG->quiz_fix_delay2);
  70         $mform->setDefault('delay2', $CFG->quiz_delay2);
  71
  72 //-------------------------------------------------------------------------------
  73         $mform->addElement('header', 'displayhdr', get_string('display', 'form'));
  74         $perpage = array();
  75         for ($i = 0; $i <= 50; ++$i) {
  76             $perpage[$i] = $i;
  77         }
  78         $perpage[0] = get_string('allinone', 'quiz');
  79         $mform->addElement('select', 'questionsperpage', get_string('questionsperpage', 'quiz'), $perpage);
  80         $mform->setHelpButton('questionsperpage', array('questionsperpage', get_string('questionsperpage', 'quiz'), 'quiz'));
  81         $mform->setAdvanced('questionsperpage', $CFG->quiz_fix_questionsperpage);
  82         $mform->setDefault('questionsperpage', $CFG->quiz_questionsperpage);
  83
  84         $mform->addElement('selectyesno', 'shufflequestions', get_string("shufflequestions", "quiz"));
  85         $mform->setHelpButton('shufflequestions', array("shufflequestions", get_string("shufflequestions","quiz"), "quiz"));
  86         $mform->setAdvanced('shufflequestions', $CFG->quiz_fix_shufflequestions);
  87         $mform->setDefault('shufflequestions', $CFG->quiz_shufflequestions);
  88
  89         $mform->addElement('selectyesno', 'shuffleanswers', get_string("shufflewithin", "quiz"));
  90         $mform->setHelpButton('shuffleanswers', array("shufflewithin", get_string("shufflewithin","quiz"), "quiz"));
  91         $mform->setAdvanced('shuffleanswers', $CFG->quiz_fix_shuffleanswers);
  92         $mform->setDefault('shuffleanswers', $CFG->quiz_shuffleanswers);
  93
  94 //-------------------------------------------------------------------------------
  95         $mform->addElement('header', 'attemptshdr', get_string('attempts', 'quiz'));
  96         $attemptoptions = array();
  97         $attemptoptions[0] = get_string("attemptsunlimited", "quiz");
  98         $attemptoptions[1] = "1 ".moodle_strtolower(get_string("attempt", "quiz"));
  99         for ($i=2;$i<=6;$i++) {
 100             $attemptoptions[$i] = "$i ".moodle_strtolower(get_string("attempts", "quiz"));
 101         }
 102         $mform->addElement('select', 'attempts', get_string("attemptsallowed", "quiz"), $attemptoptions);
 103         $mform->setHelpButton('attempts', array("attempts", get_string("attemptsallowed","quiz"), "quiz"));
 104         $mform->setAdvanced('attempts', $CFG->quiz_fix_attempts);
 105         $mform->setDefault('attempts', $CFG->quiz_attempts);
 106
 107         $mform->addElement('selectyesno', 'attemptonlast', get_string("eachattemptbuildsonthelast", "quiz"));
 108         $mform->setHelpButton('attemptonlast', array("repeatattempts", get_string("eachattemptbuildsonthelast", "quiz"), "quiz"));
 109         $mform->setAdvanced('attemptonlast', $CFG->quiz_fix_attemptonlast);
 110         $mform->setDefault('attemptonlast', $CFG->quiz_attemptonlast);
 111
 112         $mform->addElement('selectyesno', 'adaptive', get_string("adaptive", "quiz"));
 113         $mform->setHelpButton('adaptive', array("adaptive", get_string("adaptive","quiz"), "quiz"));
 114         $mform->setAdvanced('adaptive', $CFG->quiz_fix_adaptive);
 115         $mform->setDefault('adaptive', $CFG->quiz_optionflags & QUESTION_ADAPTIVE);
 116
 117
 118 //-------------------------------------------------------------------------------
 119         $mform->addElement('header', 'gradeshdr', get_string('grades', 'grades'));
 120         $mform->addElement('select', 'grademethod', get_string("grademethod", "quiz"), quiz_get_grading_options());
 121         $mform->setHelpButton('grademethod', array("grademethod", get_string("grademethod","quiz"), "quiz"));
 122         $mform->setAdvanced('grademethod', $CFG->quiz_fix_grademethod);
 123         $mform->setDefault('grademethod', $CFG->quiz_grademethod);
 124
 125         $mform->addElement('selectyesno', 'penaltyscheme', get_string("penaltyscheme", "quiz"));
 126         $mform->setHelpButton('penaltyscheme', array("penaltyscheme", get_string("penaltyscheme","quiz"), "quiz"));
 127         $mform->setAdvanced('penaltyscheme', $CFG->quiz_fix_penaltyscheme);
 128         $mform->setDefault('penaltyscheme', $CFG->quiz_penaltyscheme);
 129
 130         $options = array(
 131                     0 => '0',
 132                     1 => '1',
 133                     2 => '2',
 134                     3 => '3');
 135         $mform->addElement('select', 'decimalpoints', get_string("decimaldigits", "quiz"), $options);
 136         $mform->setHelpButton('decimalpoints', array("decimalpoints", get_string("decimaldigits","quiz"), "quiz"));
 137         $mform->setAdvanced('decimalpoints', $CFG->quiz_fix_decimalpoints);
 138         $mform->setDefault('decimalpoints', $CFG->quiz_decimalpoints);
 139
 140         $mform->addElement('hidden', 'grade', $CFG->quiz_maximumgrade);
 141
 142 //-------------------------------------------------------------------------------
 143         $mform->addElement('header', 'reviewoptionshdr', get_string("reviewoptions", "quiz"));
 144         $mform->setHelpButton('reviewoptionshdr', array("review2", get_string("allowreview","quiz"), "quiz"));
 145         $mform->setAdvanced('reviewoptionshdr', $CFG->quiz_fix_review);
 146
 147         $immediatelyoptionsgrp=array();
 148         $immediatelyoptionsgrp[] = &$mform->createElement('checkbox', 'responsesimmediately', '', get_string('responses', 'quiz'));
 149         $immediatelyoptionsgrp[] = &$mform->createElement('checkbox', 'answersimmediately', '', get_string('answers', 'quiz'));
 150         $immediatelyoptionsgrp[] = &$mform->createElement('checkbox', 'feedbackimmediately', '', get_string('feedback', 'quiz'));
 151         $immediatelyoptionsgrp[] = &$mform->createElement('checkbox', 'generalfeedbackimmediately', '', get_string('generalfeedback', 'quiz'));
 152         $immediatelyoptionsgrp[] = &$mform->createElement('checkbox', 'scoreimmediately', '', get_string('scores', 'quiz'));
 153         $immediatelyoptionsgrp[] = &$mform->createElement('checkbox', 'overallfeedbackimmediately', '', get_string('overallfeedback', 'quiz'));
 154         $mform->addGroup($immediatelyoptionsgrp, 'immediatelyoptionsgrp', get_string("reviewimmediately", "quiz"), null, false);
 155         $mform->setDefault('responsesimmediately', $CFG->quiz_review & QUIZ_REVIEW_RESPONSES & QUIZ_REVIEW_IMMEDIATELY);
 156         $mform->setDefault('answersimmediately', $CFG->quiz_review & QUIZ_REVIEW_ANSWERS & QUIZ_REVIEW_IMMEDIATELY);
 157         $mform->setDefault('feedbackimmediately', $CFG->quiz_review & QUIZ_REVIEW_FEEDBACK & QUIZ_REVIEW_IMMEDIATELY);
 158         $mform->setDefault('generalfeedbackimmediately', $CFG->quiz_review & QUIZ_REVIEW_GENERALFEEDBACK & QUIZ_REVIEW_IMMEDIATELY);
 159         $mform->setDefault('scoreimmediately', $CFG->quiz_review & QUIZ_REVIEW_SCORES & QUIZ_REVIEW_IMMEDIATELY);
 160         $mform->setDefault('overallfeedbackimmediately', $CFG->quiz_review & QUIZ_REVIEW_OVERALLFEEDBACK & QUIZ_REVIEW_IMMEDIATELY);
 161
 162         $openoptionsgrp=array();
 163         $openoptionsgrp[] = &$mform->createElement('checkbox', 'responsesopen', '', get_string('responses', 'quiz'));
 164         $openoptionsgrp[] = &$mform->createElement('checkbox', 'answersopen', '', get_string('answers', 'quiz'));
 165         $openoptionsgrp[] = &$mform->createElement('checkbox', 'feedbackopen', '', get_string('feedback', 'quiz'));
 166         $openoptionsgrp[] = &$mform->createElement('checkbox', 'generalfeedbackopen', '', get_string('generalfeedback', 'quiz'));
 167         $openoptionsgrp[] = &$mform->createElement('checkbox', 'scoreopen', '', get_string('scores', 'quiz'));
 168         $openoptionsgrp[] = &$mform->createElement('checkbox', 'overallfeedbackopen', '', get_string('overallfeedback', 'quiz'));
 169         $mform->addGroup($openoptionsgrp, 'openoptionsgrp', get_string("reviewopen", "quiz"), array(' '), false);
 170         $mform->setDefault('responsesopen', $CFG->quiz_review & QUIZ_REVIEW_RESPONSES & QUIZ_REVIEW_OPEN);
 171         $mform->setDefault('answersopen', $CFG->quiz_review & QUIZ_REVIEW_ANSWERS & QUIZ_REVIEW_OPEN);
 172         $mform->setDefault('feedbackopen', $CFG->quiz_review & QUIZ_REVIEW_FEEDBACK & QUIZ_REVIEW_OPEN);
 173         $mform->setDefault('generalfeedbackopen', $CFG->quiz_review & QUIZ_REVIEW_GENERALFEEDBACK & QUIZ_REVIEW_OPEN);
 174         $mform->setDefault('scoreopen', $CFG->quiz_review & QUIZ_REVIEW_SCORES & QUIZ_REVIEW_OPEN);
 175         $mform->setDefault('overallfeedbackopen', $CFG->quiz_review & QUIZ_REVIEW_OVERALLFEEDBACK & QUIZ_REVIEW_OPEN);
 176
 177
 178         $closedoptionsgrp=array();
 179         $closedoptionsgrp[] = &$mform->createElement('checkbox', 'responsesclosed', '', get_string('responses', 'quiz'));
 180         $closedoptionsgrp[] = &$mform->createElement('checkbox', 'answersclosed', '', get_string('answers', 'quiz'));
 181         $closedoptionsgrp[] = &$mform->createElement('checkbox', 'feedbackclosed', '', get_string('feedback', 'quiz'));
 182         $closedoptionsgrp[] = &$mform->createElement('checkbox', 'generalfeedbackclosed', '', get_string('generalfeedback', 'quiz'));
 183         $closedoptionsgrp[] = &$mform->createElement('checkbox', 'scoreclosed', '', get_string('scores', 'quiz'));
 184         $closedoptionsgrp[] = &$mform->createElement('checkbox', 'overallfeedbackclosed', '', get_string('overallfeedback', 'quiz'));
 185         $mform->addGroup($closedoptionsgrp, 'closedoptionsgrp', get_string("reviewclosed", "quiz"), array(' '), false);
 186         $mform->setDefault('responsesclosed', $CFG->quiz_review & QUIZ_REVIEW_RESPONSES & QUIZ_REVIEW_CLOSED);
 187         $mform->setDefault('answersclosed', $CFG->quiz_review & QUIZ_REVIEW_ANSWERS & QUIZ_REVIEW_CLOSED);
 188         $mform->setDefault('feedbackclosed', $CFG->quiz_review & QUIZ_REVIEW_FEEDBACK & QUIZ_REVIEW_CLOSED);
 189         $mform->setDefault('generalfeedbackclosed', $CFG->quiz_review & QUIZ_REVIEW_GENERALFEEDBACK & QUIZ_REVIEW_CLOSED);
 190         $mform->setDefault('scoreclosed', $CFG->quiz_review & QUIZ_REVIEW_SCORES & QUIZ_REVIEW_CLOSED);
 191         $mform->setDefault('overallfeedbackclosed', $CFG->quiz_review & QUIZ_REVIEW_OVERALLFEEDBACK & QUIZ_REVIEW_CLOSED);
 192
 193 //-------------------------------------------------------------------------------
 194         $mform->addElement('header', 'security', get_string('security', 'form'));
 195
 196         $mform->addElement('selectyesno', 'popup', get_string("popup", "quiz"));
 197         $mform->setHelpButton('popup', array("popup", get_string("popup", "quiz"), "quiz"));
 198         $mform->setAdvanced('popup', $CFG->quiz_fix_popup);
 199         $mform->setDefault('popup', $CFG->quiz_popup);
 200
 201         $mform->addElement('passwordunmask', 'quizpassword', get_string("requirepassword", "quiz"));
 202         $mform->setType('quizpassword', PARAM_TEXT);
 203         $mform->setHelpButton('quizpassword', array("requirepassword", get_string("requirepassword", "quiz"), "quiz"));
 204         $mform->setAdvanced('quizpassword', $CFG->quiz_fix_password);
 205         $mform->setDefault('quizpassword', $CFG->quiz_password);
 206
 207         $mform->addElement('text', 'subnet', get_string("requiresubnet", "quiz"));
 208         $mform->setType('subnet', PARAM_TEXT);
 209         $mform->setHelpButton('subnet', array("requiresubnet", get_string("requiresubnet", "quiz"), "quiz"));
 210         $mform->setAdvanced('subnet', $CFG->quiz_fix_subnet);
 211         $mform->setDefault('subnet', $CFG->quiz_subnet);
 212
 213 //-------------------------------------------------------------------------------
 214         $features = new stdClass;
 215         $features->groups = true;
 216         $features->groupings = true;
 217         $features->groupmembersonly = true;
 218         $this->standard_coursemodule_elements($features);
 219 //-------------------------------------------------------------------------------
 220         $mform->addElement('header', 'overallfeedbackhdr', get_string('overallfeedback', 'quiz'));
 221         $mform->setHelpButton('overallfeedbackhdr', array('overallfeedback', get_string('overallfeedback', 'quiz'), 'quiz'));
 222
 223         $mform->addElement('static', 'gradeboundarystatic1', get_string('gradeboundary', 'quiz'), '100%');
 224
 225         $repeatarray=array();
 226         $repeatarray[] = &MoodleQuickForm::createElement('text', 'feedbacktext', get_string('feedback', 'quiz'), array('size' => 50));
 227         $repeatarray[] = &MoodleQuickForm::createElement('text', 'feedbackboundaries', get_string('gradeboundary', 'quiz'), array('size' => 10));
 228
 229         if (!empty($this->_instance)) {
 230             $this->_feedbacks = get_records('quiz_feedback', 'quizid', $this->_instance, 'mingrade DESC');
 231         } else {
 232             $this->_feedbacks = array();
 233         }
 234         $numfeedbacks = max(count($this->_feedbacks) * 1.5, 5);
 235
 236         $mform->setType('feedbacktext', PARAM_RAW);
 237         $mform->setType('feedbackboundaries', PARAM_NOTAGS);
 238
 239         $nextel=$this->repeat_elements($repeatarray, $numfeedbacks-1,
 240                     array(), 'boundary_repeats', 'boundary_add_fields', 3);
 241
 242         //put some extra elements in before the button
 243         $insertEl = &MoodleQuickForm::createElement('text', "feedbacktext[$nextel]", get_string('feedback', 'quiz'), array('size' => 50));
 244         $mform->insertElementBefore($insertEl, 'boundary_add_fields');
 245
 246         $insertEl = &MoodleQuickForm::createElement('static', 'gradeboundarystatic2', get_string('gradeboundary', 'quiz'), '0%');
 247         $mform->insertElementBefore($insertEl, 'boundary_add_fields');
 248
 249 //-------------------------------------------------------------------------------
 250         // buttons
 251         $this->add_action_buttons();
 252     }
 253
 254     function data_preprocessing(&$default_values){
 255         if (count($this->_feedbacks)) {
 256             $key = 0;
 257             foreach ($this->_feedbacks as $feedback){
 258                 $default_values['feedbacktext['.$key.']'] = $feedback->feedbacktext;
 259                 if ($feedback->mingrade > 0) {
 260                     $default_values['feedbackboundaries['.$key.']'] = (100.0 * $feedback->mingrade / $default_values['grade']) . '%';
 261                 }
 262                 $key++;
 263             }
 264
 265         }
 266         if (empty($default_values['timelimit'])) {
 267             $default_values['timelimitenable'] = 0;
 268         } else {
 269             $default_values['timelimitenable'] = 1;
 270         }
 271
 272         if (isset($default_values['review'])){
 273             $review = (int)$default_values['review'];
 274             unset($default_values['review']);
 275
 276             $default_values['responsesimmediately'] = $review & QUIZ_REVIEW_RESPONSES & QUIZ_REVIEW_IMMEDIATELY;
 277             $default_values['answersimmediately'] = $review & QUIZ_REVIEW_ANSWERS & QUIZ_REVIEW_IMMEDIATELY;
 278             $default_values['feedbackimmediately'] = $review & QUIZ_REVIEW_FEEDBACK & QUIZ_REVIEW_IMMEDIATELY;
 279             $default_values['generalfeedbackimmediately'] = $review & QUIZ_REVIEW_GENERALFEEDBACK & QUIZ_REVIEW_IMMEDIATELY;
 280             $default_values['scoreimmediately'] = $review & QUIZ_REVIEW_SCORES & QUIZ_REVIEW_IMMEDIATELY;
 281             $default_values['overallfeedbackimmediately'] = $review & QUIZ_REVIEW_OVERALLFEEDBACK & QUIZ_REVIEW_IMMEDIATELY;
 282
 283             $default_values['responsesopen'] = $review & QUIZ_REVIEW_RESPONSES & QUIZ_REVIEW_OPEN;
 284             $default_values['answersopen'] = $review & QUIZ_REVIEW_ANSWERS & QUIZ_REVIEW_OPEN;
 285             $default_values['feedbackopen'] = $review & QUIZ_REVIEW_FEEDBACK & QUIZ_REVIEW_OPEN;
 286             $default_values['generalfeedbackopen'] = $review & QUIZ_REVIEW_GENERALFEEDBACK & QUIZ_REVIEW_OPEN;
 287             $default_values['scoreopen'] = $review & QUIZ_REVIEW_SCORES & QUIZ_REVIEW_OPEN;
 288             $default_values['overallfeedbackopen'] = $review & QUIZ_REVIEW_OVERALLFEEDBACK & QUIZ_REVIEW_OPEN;
 289
 290             $default_values['responsesclosed'] = $review & QUIZ_REVIEW_RESPONSES & QUIZ_REVIEW_CLOSED;
 291             $default_values['answersclosed'] = $review & QUIZ_REVIEW_ANSWERS & QUIZ_REVIEW_CLOSED;
 292             $default_values['feedbackclosed'] = $review & QUIZ_REVIEW_FEEDBACK & QUIZ_REVIEW_CLOSED;
 293             $default_values['generalfeedbackclosed'] = $review & QUIZ_REVIEW_GENERALFEEDBACK & QUIZ_REVIEW_CLOSED;
 294             $default_values['scoreclosed'] = $review & QUIZ_REVIEW_SCORES & QUIZ_REVIEW_CLOSED;
 295             $default_values['overallfeedbackclosed'] = $review & QUIZ_REVIEW_OVERALLFEEDBACK & QUIZ_REVIEW_CLOSED;
 296         }
 297
 298         if (isset($default_values['optionflags'])){
 299             $default_values['adaptive'] = $default_values['optionflags'] & QUESTION_ADAPTIVE;
 300             unset($default_values['optionflags']);
 301         }
 302
 303         // Password field - different in form to stop browsers that remember passwords
 304         // getting confused.
 305         if (isset($default_values['password'])) {
 306             $default_values['quizpassword'] = $default_values['password'];
 307             unset($default_values['password']);
 308         }
 309     }
 310
 311     function validation($data){
 312         $errors = parent::validation($data);
 313         if ($errors === true) {
 314             $errors = array();
 315         }
 316
 317         // Check open and close times are consistent.
 318         if ($data['timeopen'] != 0 && $data['timeclose'] != 0 && $data['timeclose'] < $data['timeopen']) {
 319             $errors['timeclose'] = get_string('closebeforeopen', 'quiz');
 320         }
 321
 322         // Check the boundary value is a number or a percentage, and in range.
 323         $i = 0;
 324         while (!empty($data['feedbackboundaries'][$i] )) {
 325             $boundary = trim($data['feedbackboundaries'][$i]);
 326             if (strlen($boundary) > 0 && $boundary[strlen($boundary) - 1] == '%') {
 327                 $boundary = trim(substr($boundary, 0, -1));
 328                 if (is_numeric($boundary)) {
 329                     $boundary = $boundary * $data['grade'] / 100.0;
 330                 } else {
 331                     $errors["feedbackboundaries[$i]"] = get_string('feedbackerrorboundaryformat', 'quiz', $i + 1);
 332                 }
 333             }
 334             if (is_numeric($boundary) && $boundary <= 0 || $boundary >= $data['grade'] ) {
 335                 $errors["feedbackboundaries[$i]"] = get_string('feedbackerrorboundaryoutofrange', 'quiz', $i + 1);
 336             }
 337             if (is_numeric($boundary) && $i > 0 && $boundary >= $data['feedbackboundaries'][$i - 1]) {
 338                 $errors["feedbackboundaries[$i]"] = get_string('feedbackerrororder', 'quiz', $i + 1);
 339             }
 340             $data['feedbackboundaries'][$i] = $boundary;
 341             $i += 1;
 342         }
 343         $numboundaries = $i;
 344
 345         // Check there is nothing in the remaining unused fields.
 346         for ($i = $numboundaries; $i < count($data['feedbackboundaries'] ); $i += 1) {
 347             if (!empty($data['feedbackboundaries'][$i] ) && trim($data['feedbackboundaries'][$i] ) != '') {
 348                 $errors["feedbackboundaries[$i]"] = get_string('feedbackerrorjunkinboundary', 'quiz', $i + 1);
 349             }
 350         }
 351         for ($i = $numboundaries + 1; $i < count($data['feedbacktext'] ); $i += 1) {
 352             if (!empty($data['feedbacktext'][$i] ) && trim($data['feedbacktext'][$i] ) != '') {
 353                 $errors["feedbacktext[$i]"] = get_string('feedbackerrorjunkinfeedback', 'quiz', $i + 1);
 354             }
 355         }
 356
 357         if (count($errors) == 0) {
 358             return true;
 359         } else {
 360             return $errors;
 361         }
 362     }
 363
 364 }
 365 ?>