chamilo / chamilo-lms

main/inc/lib/exercise.lib.php

Doc Comments +8 added lines, -5 removed lines

@@ -1279,6 +1279,7 @@ 
 
     /**
      * Validates the time control key
+     * @param integer $exercise_id
      */
     public static function exercise_time_control_is_valid(
         $exercise_id,
@@ -1412,7 +1413,7 @@ 
      * @param int $in_direction
      * @param string $in_hotpot_path
      * @param bool $in_get_count
-     * @param null $where_condition
+     * @param string $where_condition
      * @return array|int
      */
     public static function get_exam_results_hotpotatoes_data(
@@ -2213,7 +2214,7 @@ 
     /**
      * Converts a numeric value in a percentage example 0.66666 to 66.67 %
      * @param $value
-     * @return float Converted number
+     * @return string Converted number
      */
     public static function convert_to_percentage($value)
     {
@@ -2229,7 +2230,7 @@ 
      * @param   float $score
      * @param   float $weight
      * @deprecated seem not to be used
-     * @return  float   the score rounded converted to the new range
+     * @return  string|null   the score rounded converted to the new range
      */
     public static function convert_score($score, $weight)
     {
@@ -2780,6 +2781,7 @@ 
      * @param    int        exercise id
      * @param    int    $courseId
      * @param    int        session id
+     * @param integer $user_count
      * @return    float    Best average score
      */
     public static function get_best_average_score_by_exercise(
@@ -3219,8 +3221,9 @@ 
     }
 
     /**
-     * @param array $answer
+     * @param string|null $answer
      * @param string $user_answer
+     * @param string|null $current_answer
      * @return array
      */
     public static function check_fill_in_blanks($answer, $user_answer, $current_answer)
@@ -3848,7 +3851,7 @@ 
 
     /**
      * @param int $countLetter
-     * @return mixed
+     * @return string
      */
     public static function detectInputAppropriateClass($countLetter)
     {

Spacing +115 added lines, -115 removed lines

@@ -65,7 +65,7 @@ 
                 if ($show_title) {
                     TestCategory::displayCategoryAndTitle($objQuestionTmp->id);
                     echo Display::div(
-                        $current_item . '. ' . $objQuestionTmp->selectTitle(),
+                        $current_item.'. '.$objQuestionTmp->selectTitle(),
                         array('class' => 'question_title')
                     );
                 }
@@ -168,8 +168,8 @@ 
                 $config = array(
                     'ToolbarSet' => 'TestFreeAnswer'
                 );
-                $form->addHtmlEditor("choice[" . $questionId . "]", null, false, false, $config);
-                $form->setDefaults(array("choice[" . $questionId . "]" => $fck_content));
+                $form->addHtmlEditor("choice[".$questionId."]", null, false, false, $config);
+                $form->setDefaults(array("choice[".$questionId."]" => $fck_content));
                 $s .= $form->returnForm();
             } elseif ($answerType == ORAL_EXPRESSION) {
                 // Add nanog
@@ -198,7 +198,7 @@ 
                 $config = array(
                     'ToolbarSet' => 'TestFreeAnswer'
                 );
-                $form->addHtmlEditor("choice[" . $questionId . "]", null, false, false, $config);
+                $form->addHtmlEditor("choice[".$questionId."]", null, false, false, $config);
                 //$form->setDefaults(array("choice[" . $questionId . "]" => $fck_content));
                 $s .= $form->returnForm();
             }
@@ -279,7 +279,7 @@ 
 
                 // Unique answer
                 if (in_array($answerType, [UNIQUE_ANSWER, UNIQUE_ANSWER_NO_OPTION, UNIQUE_ANSWER_IMAGE])) {
-                    $input_id = 'choice-' . $questionId . '-' . $answerId;
+                    $input_id = 'choice-'.$questionId.'-'.$answerId;
                     if (isset($user_choice[0]['answer']) && $user_choice[0]['answer'] == $numAnswer) {
                         $attributes = array(
                             'id' => $input_id,
@@ -304,14 +304,14 @@ 
                     if ($answerType == UNIQUE_ANSWER_IMAGE) {
                         if ($show_comment) {
                             if (empty($comment)) {
-                                $s .= '<div id="answer' . $questionId . $numAnswer . '" '
+                                $s .= '<div id="answer'.$questionId.$numAnswer.'" '
                                     . 'class="exercise-unique-answer-image" style="text-align: center">';
                             } else {
-                                $s .= '<div id="answer' . $questionId . $numAnswer . '" '
+                                $s .= '<div id="answer'.$questionId.$numAnswer.'" '
                                     . 'class="exercise-unique-answer-image col-xs-6 col-sm-12" style="text-align: center">';
                             }
                         } else {
-                            $s .= '<div id="answer' . $questionId . $numAnswer . '" '
+                            $s .= '<div id="answer'.$questionId.$numAnswer.'" '
                                 . 'class="exercise-unique-answer-image col-xs-6 col-md-3" style="text-align: center">';
                         }
                     }
@@ -319,7 +319,7 @@ 
                     $answer = Security::remove_XSS($answer, STUDENT);
                     $s .= Display::input(
                         'hidden',
-                        'choice2[' . $questionId . ']',
+                        'choice2['.$questionId.']',
                         '0'
                     );
 
@@ -327,13 +327,13 @@ 
 
                     if ($answerType == UNIQUE_ANSWER_IMAGE) {
                         $attributes['style'] = 'display: none;';
-                        $answer = '<div class="thumbnail">' . $answer . '</div>';
+                        $answer = '<div class="thumbnail">'.$answer.'</div>';
                     }
 
                     $answer_input .= '<label class="radio">';
                     $answer_input .= Display::input(
                         'radio',
-                        'choice[' . $questionId . ']',
+                        'choice['.$questionId.']',
                         $numAnswer,
                         $attributes
                     );
@@ -360,7 +360,7 @@ 
                     $answerType == MULTIPLE_ANSWER_TRUE_FALSE ||
                     $answerType == GLOBAL_MULTIPLE_ANSWER
                 ) {
-                    $input_id = 'choice-' . $questionId . '-' . $answerId;
+                    $input_id = 'choice-'.$questionId.'-'.$answerId;
                     $answer = Security::remove_XSS($answer, STUDENT);
 
                     if (in_array($numAnswer, $user_choice_array)) {
@@ -381,12 +381,12 @@ 
                     }
 
                     if ($answerType == MULTIPLE_ANSWER || $answerType == GLOBAL_MULTIPLE_ANSWER) {
-                        $s .= '<input type="hidden" name="choice2[' . $questionId . ']" value="0" />';
+                        $s .= '<input type="hidden" name="choice2['.$questionId.']" value="0" />';
 
                         $answer_input = '<label class="checkbox">';
                         $answer_input .= Display::input(
                             'checkbox',
-                            'choice[' . $questionId . '][' . $numAnswer . ']',
+                            'choice['.$questionId.']['.$numAnswer.']',
                             $numAnswer,
                             $attributes
                         );
@@ -439,7 +439,7 @@ 
                                     'td',
                                     Display::input(
                                         'radio',
-                                        'choice[' . $questionId . '][' . $numAnswer . ']',
+                                        'choice['.$questionId.']['.$numAnswer.']',
                                         $id,
                                         $attributes
                                     ),
@@ -457,7 +457,7 @@ 
                     }
                 } elseif ($answerType == MULTIPLE_ANSWER_COMBINATION) {
                     // multiple answers
-                    $input_id = 'choice-' . $questionId . '-' . $answerId;
+                    $input_id = 'choice-'.$questionId.'-'.$answerId;
 
                     if (in_array($numAnswer, $user_choice_array)) {
                         $attributes = array(
@@ -477,11 +477,11 @@ 
                     }
 
                     $answer = Security::remove_XSS($answer, STUDENT);
-                    $answer_input = '<input type="hidden" name="choice2[' . $questionId . ']" value="0" />';
+                    $answer_input = '<input type="hidden" name="choice2['.$questionId.']" value="0" />';
                     $answer_input .= '<label class="checkbox">';
                     $answer_input .= Display::input(
                         'checkbox',
-                        'choice[' . $questionId . '][' . $numAnswer . ']',
+                        'choice['.$questionId.']['.$numAnswer.']',
                         1,
                         $attributes
                     );
@@ -502,7 +502,7 @@ 
                     }
 
                 } elseif ($answerType == MULTIPLE_ANSWER_COMBINATION_TRUE_FALSE) {
-                    $s .= '<input type="hidden" name="choice2[' . $questionId . ']" value="0" />';
+                    $s .= '<input type="hidden" name="choice2['.$questionId.']" value="0" />';
 
                     $my_choice = array();
                     if (!empty($user_choice_array)) {
@@ -537,7 +537,7 @@ 
                             'td',
                             Display::input(
                                 'radio',
-                                'choice[' . $questionId . '][' . $numAnswer . ']',
+                                'choice['.$questionId.']['.$numAnswer.']',
                                 $key,
                                 $attributes
                             )
@@ -633,8 +633,8 @@ 
                     $trackAttempts = Database::get_main_table(
                         TABLE_STATISTIC_TRACK_E_ATTEMPT
                     );
-                    $sql = 'SELECT answer FROM ' . $trackAttempts . '
-                            WHERE exe_id=' . $exerciseId . ' AND question_id=' . $questionId;
+                    $sql = 'SELECT answer FROM '.$trackAttempts.'
+                            WHERE exe_id=' . $exerciseId.' AND question_id='.$questionId;
                     $rsLastAttempt = Database::query($sql);
                     $rowLastAttempt = Database::fetch_array($rsLastAttempt);
                     $answer = $rowLastAttempt['answer'];
@@ -704,7 +704,7 @@ 
                                 '',
                                 $answerCorrected
                             );
-                            $answerCorrected = '[' . $answerCorrected . ']';
+                            $answerCorrected = '['.$answerCorrected.']';
                             $studentAnswerList[] = $answerCorrected;
                         }
                     }
@@ -725,7 +725,7 @@ 
                     */
                     $tabComments = api_preg_split(
                         '/\[[^]]+\]/',
-                        ' ' . $answer . ' '
+                        ' '.$answer.' '
                     );
                     if (!empty($correctAnswerList) && !empty($studentAnswerList)) {
                         $answer = "";
@@ -742,7 +742,7 @@ 
                                 $size
                             );
 
-                            $answer .= $tabComments[$i] .
+                            $answer .= $tabComments[$i].
                                 Display::input(
                                     'text',
                                     "choice[$questionId][]",
@@ -788,12 +788,12 @@ 
                         $s .= '<tr><td width="45%" valign="top">';
                         $parsed_answer = $answer;
                         //left part questions
-                        $s .= '<p class="indent">' . $lines_count . '.&nbsp;' . $parsed_answer . '</p></td>';
+                        $s .= '<p class="indent">'.$lines_count.'.&nbsp;'.$parsed_answer.'</p></td>';
                         //middle part (matches selects)
 
                         $s .= '<td width="10%" valign="top" align="center" >
                                 <div class="select-matching">
-                                <select name="choice[' . $questionId . '][' . $numAnswer . ']">';
+                                <select name="choice[' . $questionId.']['.$numAnswer.']">';
 
                         // fills the list-box
                         foreach ($select_items as $key => $val) {
@@ -809,14 +809,14 @@ 
                             if (isset($user_choice_array_position[$numAnswer]) && $val['id'] == $user_choice_array_position[$numAnswer]) {
                                 $selected = 'selected="selected"';
                             }
-                            $s .= '<option value="' . $val['id'] . '" ' . $selected . '>' . $val['letter'] . '</option>';
+                            $s .= '<option value="'.$val['id'].'" '.$selected.'>'.$val['letter'].'</option>';
 
                         }  // end foreach()
 
                         $s .= '</select></div></td><td width="5%" class="separate">&nbsp;</td>';
                         $s .= '<td width="40%" valign="top" >';
                         if (isset($select_items[$lines_count])) {
-                            $s .= '<div class="text-right"><p class="indent">' . $select_items[$lines_count]['letter'].'.&nbsp; '. $select_items[$lines_count]['answer'].'</p></div>';
+                            $s .= '<div class="text-right"><p class="indent">'.$select_items[$lines_count]['letter'].'.&nbsp; '.$select_items[$lines_count]['answer'].'</p></div>';
                         } else {
                             $s .= '&nbsp;';
                         }
@@ -831,7 +831,7 @@ 
                                 $s .= '<tr>
                                       <td colspan="2"></td>
                                       <td valign="top">';
-                                $s .= '<b>' . $select_items[$lines_count]['letter'] . '.</b> ' . $select_items[$lines_count]['answer'];
+                                $s .= '<b>'.$select_items[$lines_count]['letter'].'.</b> '.$select_items[$lines_count]['answer'];
                                 $s .= "</td>
                                 </tr>";
                                 $lines_count++;
@@ -847,9 +847,9 @@ 
                         $data = $objAnswerTmp->getAnswerByAutoId($data['correct']);
                         $lines_count = $data['answer'];*/
 
-                        $windowId = $questionId . '_' . $lines_count;
+                        $windowId = $questionId.'_'.$lines_count;
 
-                        $s .= '<li class="touch-items" id="' . $windowId . '">';
+                        $s .= '<li class="touch-items" id="'.$windowId.'">';
                         $s .= Display::div(
                             $parsed_answer,
                             [
@@ -907,7 +907,7 @@ 
                                 Display::tag(
                                     'b',
                                     $select_items[$lines_count]['letter']
-                                ) . $select_items[$lines_count]['answer'],
+                                ).$select_items[$lines_count]['answer'],
                                 [
                                     'id' => "window_{$windowId}_answer",
                                     'style' => 'display: none;'
@@ -1051,7 +1051,7 @@ 
 
             if ($show_comment) {
                 $s .= '</table>';
-            } elseif(
+            } elseif (
                 in_array(
                     $answerType,
                     [
@@ -1076,7 +1076,7 @@ 
 
                 for ($answerId = 1; $answerId <= $nbrAnswers; $answerId++) {
                     $answerCorrect = $objAnswerTmp->isCorrect($answerId);
-                    $windowId = $questionId . '_' . $counterAnswer;
+                    $windowId = $questionId.'_'.$counterAnswer;
 
                     if ($answerCorrect) {
                         $s .= Display::div(
@@ -1121,7 +1121,7 @@ 
                 $course = api_get_course_info();
                 $doc_id = DocumentManager::get_document_id(
                     $course,
-                    '/images/' . $pictureName
+                    '/images/'.$pictureName
                 );
                 if (is_numeric($doc_id)) {
                     $images_folder_visibility = api_get_item_visibility(
@@ -1146,7 +1146,7 @@ 
                 echo "
                     <script>
                         $(document).on('ready', function () {
-                            new " . ($answerType == HOT_SPOT ?  "HotspotQuestion" : "DelineationQuestion" ) . "({
+                            new " . ($answerType == HOT_SPOT ? "HotspotQuestion" : "DelineationQuestion")."({
                                 questionId: $questionId,
                                 exerciseId: $exerciseId,
                                 selector: '#hotspot-preview-$questionId',
@@ -1180,7 +1180,7 @@ 
             if ($answerType != HOT_SPOT_DELINEATION) {
                 $answerList = '
                     <div class="well well-sm">
-                        <h5 class="page-header">' . get_lang('HotspotZones') . '</h5>
+                        <h5 class="page-header">' . get_lang('HotspotZones').'</h5>
                         <ol>
                 ';
 
@@ -1205,7 +1205,7 @@ 
             if (!$only_questions) {
                 if ($show_title) {
                     TestCategory::displayCategoryAndTitle($objQuestionTmp->id);
-                    echo '<div class="question_title">' . $current_item . '. ' . $questionName . '</div>';
+                    echo '<div class="question_title">'.$current_item.'. '.$questionName.'</div>';
                 }
                 //@todo I need to the get the feedback type
                 echo <<<HOTSPOT
@@ -1223,7 +1223,7 @@ 
                                 <div class=\"hotspot-image\"></div>
                                 <script>
                                     $(document).on('ready', function () {
-                                        new " . ($answerType == HOT_SPOT_DELINEATION ? 'DelineationQuestion' : 'HotspotQuestion') . "({
+                                        new " . ($answerType == HOT_SPOT_DELINEATION ? 'DelineationQuestion' : 'HotspotQuestion')."({
                                             questionId: $questionId,
                                             exerciseId: $exe_id,
                                             selector: '#question_div_' + $questionId + ' .hotspot-image',
@@ -1342,11 +1342,11 @@ 
         $lp_id = intval($lp_id);
         $lp_item_id = intval($lp_item_id);
         return
-            api_get_course_int_id() . '_' .
-            api_get_session_id() . '_' .
-            $exercise_id . '_' .
-            api_get_user_id() . '_' .
-            $lp_id . '_' .
+            api_get_course_int_id().'_'.
+            api_get_session_id().'_'.
+            $exercise_id.'_'.
+            api_get_user_id().'_'.
+            $lp_id.'_'.
             $lp_item_id;
     }
 
@@ -1458,14 +1458,14 @@ 
         $res = Database::query($sql);
         $result = array();
         $apiIsAllowedToEdit = api_is_allowed_to_edit();
-        $urlBase = api_get_path(WEB_CODE_PATH) .
-            'exercice/hotpotatoes_exercise_report.php?action=delete&' .
-            api_get_cidreq() . '&id=';
+        $urlBase = api_get_path(WEB_CODE_PATH).
+            'exercice/hotpotatoes_exercise_report.php?action=delete&'.
+            api_get_cidreq().'&id=';
         while ($data = Database::fetch_array($res)) {
             $actions = null;
 
             if ($apiIsAllowedToEdit) {
-                $url = $urlBase . $data['id'] . '&path=' . $data['exe_name'];
+                $url = $urlBase.$data['id'].'&path='.$data['exe_name'];
                 $actions = Display::url(
                     Display::return_icon('delete.png', get_lang('Delete')),
                     $url
@@ -1481,7 +1481,7 @@ 
                     GroupManager::get_user_group_name($data['user_id'])
                 ),
                 'exe_date' => $data['exe_date'],
-                'score' => $data['exe_result'] . ' / ' . $data['exe_weighting'],
+                'score' => $data['exe_result'].' / '.$data['exe_weighting'],
                 'actions' => $actions,
             );
         }
@@ -1564,18 +1564,18 @@ 
         $TBL_TRACK_HOTPOTATOES = Database:: get_main_table(TABLE_STATISTIC_TRACK_E_HOTPOTATOES);
         $TBL_TRACK_ATTEMPT_RECORDING = Database:: get_main_table(TABLE_STATISTIC_TRACK_E_ATTEMPT_RECORDING);
 
-        $session_id_and = ' AND te.session_id = ' . $sessionId . ' ';
+        $session_id_and = ' AND te.session_id = '.$sessionId.' ';
         $exercise_id = intval($exercise_id);
 
         $exercise_where = '';
         if (!empty($exercise_id)) {
-            $exercise_where .= ' AND te.exe_exo_id = ' . $exercise_id . '  ';
+            $exercise_where .= ' AND te.exe_exo_id = '.$exercise_id.'  ';
         }
 
         $hotpotatoe_where = '';
         if (!empty($_GET['path'])) {
             $hotpotatoe_path = Database::escape_string($_GET['path']);
-            $hotpotatoe_where .= ' AND exe_name = "' . $hotpotatoe_path . '"  ';
+            $hotpotatoe_where .= ' AND exe_name = "'.$hotpotatoe_path.'"  ';
         }
 
         // sql for chamilo-type tests for teacher / tutor view
@@ -1587,7 +1587,7 @@ 
             WHERE
                 c_id = $course_id AND
                 exe_exo_id = $exercise_id AND
-                ttte.session_id = " . $sessionId . "
+                ttte.session_id = ".$sessionId."
         )";
 
         if ($is_allowedToEdit) {
@@ -1610,9 +1610,9 @@ 
                         g.id as group_id
                     FROM $TBL_USER u
                     INNER JOIN $TBL_GROUP_REL_USER gru
-                    ON (gru.user_id = u.user_id AND gru.c_id=" . $course_id . ")
+                    ON (gru.user_id = u.user_id AND gru.c_id=".$course_id.")
                     INNER JOIN $TBL_GROUP g
-                    ON (gru.group_id = g.id AND g.c_id=" . $course_id . ")
+                    ON (gru.group_id = g.id AND g.c_id=".$course_id.")
                 )";
             }
 
@@ -1674,9 +1674,9 @@ 
                     g.id as group_id
                 FROM $TBL_USER u
                 LEFT OUTER JOIN $TBL_GROUP_REL_USER gru
-                ON ( gru.user_id = u.user_id AND gru.c_id=" . $course_id . " )
+                ON ( gru.user_id = u.user_id AND gru.c_id=".$course_id." )
                 LEFT OUTER JOIN $TBL_GROUP g
-                ON (gru.group_id = g.id AND g.c_id = " . $course_id . ")
+                ON (gru.group_id = g.id AND g.c_id = ".$course_id.")
             )";
             }
 
@@ -1689,12 +1689,12 @@ 
             (
                 SELECT u.user_id, firstname, lastname, email, username, ' ' as group_name, '' as group_id, official_code
                 FROM $TBL_USER u
-                WHERE u.status NOT IN(" . api_get_users_status_ignored_in_reports('string') . ")
+                WHERE u.status NOT IN(".api_get_users_status_ignored_in_reports('string').")
             )";
             }
 
             $sqlFromOption = " , $TBL_GROUP_REL_USER AS gru ";
-            $sqlWhereOption = "  AND gru.c_id = " . $course_id ." AND gru.user_id = user.user_id ";
+            $sqlWhereOption = "  AND gru.c_id = ".$course_id." AND gru.user_id = user.user_id ";
             $first_and_last_name = api_is_western_name_order() ? "firstname, lastname" : "lastname, firstname";
 
             if ($get_count) {
@@ -1731,8 +1731,8 @@ 
                 ON (user.user_id = exe_user_id)
                 WHERE
                     te.status != 'incomplete' AND
-                    te.c_id = " . $course_id . " $session_id_and AND
-                    ce.active <>-1 AND ce.c_id = " . $course_id . "
+                    te.c_id = ".$course_id." $session_id_and AND
+                    ce.active <>-1 AND ce.c_id = ".$course_id."
                     $exercise_where
                     $extra_where_conditions
                 ";
@@ -1759,12 +1759,12 @@ 
                     $sqlFromOption
                 WHERE
                     user.user_id=tth.exe_user_id
-                    AND tth.c_id = " . $course_id . "
+                    AND tth.c_id = ".$course_id."
                     $hotpotatoe_where
                     $sqlWhereOption
-                    AND user.status NOT IN(" . api_get_users_status_ignored_in_reports(
+                    AND user.status NOT IN(".api_get_users_status_ignored_in_reports(
                     'string'
-                ) . ")
+                ).")
                 ORDER BY
                     tth.c_id ASC,
                     tth.exe_date DESC";
@@ -1837,12 +1837,12 @@ 
 
                     if ($from_gradebook && ($is_allowedToEdit)) {
                         if (in_array(
-                            $results[$i]['username'] . $results[$i]['firstname'] . $results[$i]['lastname'],
+                            $results[$i]['username'].$results[$i]['firstname'].$results[$i]['lastname'],
                             $users_array_id
                         )) {
                             continue;
                         }
-                        $users_array_id[] = $results[$i]['username'] . $results[$i]['firstname'] . $results[$i]['lastname'];
+                        $users_array_id[] = $results[$i]['username'].$results[$i]['firstname'].$results[$i]['lastname'];
                     }
 
                     $lp_obj = isset($results[$i]['orig_lp_id']) && isset($lp_list[$results[$i]['orig_lp_id']]) ? $lp_list[$results[$i]['orig_lp_id']] : null;
@@ -1851,8 +1851,8 @@ 
                     if ($lp_obj) {
                         $url = api_get_path(
                                 WEB_CODE_PATH
-                            ) . 'newscorm/lp_controller.php?' . api_get_cidreq(
-                            ) . '&action=view&lp_id=' . $results[$i]['orig_lp_id'];
+                            ).'newscorm/lp_controller.php?'.api_get_cidreq(
+                            ).'&action=view&lp_id='.$results[$i]['orig_lp_id'];
                         $lp_name = Display::url(
                             $lp_obj['lp_name'],
                             $url,
@@ -1870,7 +1870,7 @@ 
                         );
 
                         foreach ($group_list as $id) {
-                            $group_name_list .= $clean_group_list[$id] . '<br/>';
+                            $group_name_list .= $clean_group_list[$id].'<br/>';
                         }
                         $results[$i]['group_name'] = $group_name_list;
                     }
@@ -1926,8 +1926,8 @@ 
                                 }
                             }
                             if ($revised) {
-                                $actions .= "<a href='exercise_show.php?" . api_get_cidreq(
-                                    ) . "&action=edit&id=$id'>" .
+                                $actions .= "<a href='exercise_show.php?".api_get_cidreq(
+                                    )."&action=edit&id=$id'>".
                                     Display:: return_icon(
                                         'edit.png',
                                         get_lang('Edit'),
@@ -1936,8 +1936,8 @@ 
                                     );
                                 $actions .= '&nbsp;';
                             } else {
-                                $actions .= "<a href='exercise_show.php?" . api_get_cidreq(
-                                    ) . "&action=qualify&id=$id'>" .
+                                $actions .= "<a href='exercise_show.php?".api_get_cidreq(
+                                    )."&action=qualify&id=$id'>".
                                     Display:: return_icon(
                                         'quiz.gif',
                                         get_lang('Qualify')
@@ -1947,12 +1947,12 @@ 
                             $actions .= "</a>";
 
                             if ($filter == 2) {
-                                $actions .= ' <a href="exercise_history.php?' . api_get_cidreq(
-                                    ) . '&exe_id=' . $id . '">' .
+                                $actions .= ' <a href="exercise_history.php?'.api_get_cidreq(
+                                    ).'&exe_id='.$id.'">'.
                                     Display:: return_icon(
                                         'history.gif',
                                         get_lang('ViewHistoryChange')
-                                    ) . '</a>';
+                                    ).'</a>';
                             }
 
                             //Admin can always delete the attempt
@@ -1964,32 +1964,32 @@ 
                                     date('Y-m-d h:i:s'),
                                     false
                                 );
-                                $actions .= '<a href="http://www.whatsmyip.org/ip-geo-location/?ip=' . $ip . '" target="_blank">
+                                $actions .= '<a href="http://www.whatsmyip.org/ip-geo-location/?ip='.$ip.'" target="_blank">
                                 '.Display::return_icon('info.png', $ip).'
                                 </a>';
 
-                                $delete_link = '<a href="exercise_report.php?' . api_get_cidreq() . '&filter_by_user=' . intval($_GET['filter_by_user']) . '&filter=' . $filter . '&exerciseId=' . $exercise_id . '&delete=delete&did=' . $id . '"
+                                $delete_link = '<a href="exercise_report.php?'.api_get_cidreq().'&filter_by_user='.intval($_GET['filter_by_user']).'&filter='.$filter.'&exerciseId='.$exercise_id.'&delete=delete&did='.$id.'"
                                 onclick="javascript:if(!confirm(\'' . sprintf(
                                         get_lang('DeleteAttempt'),
                                         $results[$i]['username'],
                                         $dt
-                                    ) . '\')) return false;">' . Display:: return_icon(
+                                    ).'\')) return false;">'.Display:: return_icon(
                                         'delete.png',
                                         get_lang('Delete')
-                                    ) . '</a>';
+                                    ).'</a>';
                                 $delete_link = utf8_encode($delete_link);
 
                                 if (api_is_drh() && !api_is_platform_admin()) {
                                     $delete_link = null;
                                 }
-                                $actions .= $delete_link . '&nbsp;';
+                                $actions .= $delete_link.'&nbsp;';
                             }
 
                         } else {
                             $attempt_url = api_get_path(
                                     WEB_CODE_PATH
-                                ) . 'exercice/result.php?' . api_get_cidreq(
-                                ) . '&id=' . $results[$i]['exe_id'] . '&id_session=' . $sessionId;
+                                ).'exercice/result.php?'.api_get_cidreq(
+                                ).'&id='.$results[$i]['exe_id'].'&id_session='.$sessionId;
                             $attempt_link = Display::url(
                                 get_lang('Show'),
                                 $attempt_url,
@@ -2046,7 +2046,7 @@ 
                     $hp_result = round(
                             ($hpresults[$i][4] / ($hpresults[$i][5] != 0 ? $hpresults[$i][5] : 1)) * 100,
                             2
-                        ) . '% (' . $hpresults[$i][4] . ' / ' . $hpresults[$i][5] . ')';
+                        ).'% ('.$hpresults[$i][4].' / '.$hpresults[$i][5].')';
                     if ($is_allowedToEdit) {
                         $list_info[] = array(
                             $hpresults[$i][0],
@@ -2119,13 +2119,13 @@ 
 
         $html = null;
         if ($show_percentage) {
-            $parent = '(' . $score . ' / ' . $weight . ')';
-            $html = $percentage . "%  $parent";
+            $parent = '('.$score.' / '.$weight.')';
+            $html = $percentage."%  $parent";
             if ($show_only_percentage) {
-                $html = $percentage . "% ";
+                $html = $percentage."% ";
             }
         } else {
-            $html = $score . ' / ' . $weight;
+            $html = $score.' / '.$weight;
         }
         $html = Display::span($html, array('class' => 'score_exercise'));
 
@@ -2219,7 +2219,7 @@ 
     {
         $return = '-';
         if ($value != '') {
-            $return = float_format($value * 100, 1) . ' %';
+            $return = float_format($value * 100, 1).' %';
         }
         return $return;
     }
@@ -2297,7 +2297,7 @@ 
         }
 
         $needle_where = !empty($search) ? " AND title LIKE '?' " : '';
-        $needle = !empty($search) ? "%" . $search . "%" : '';
+        $needle = !empty($search) ? "%".$search."%" : '';
 
         // Show courses by active status
         $active_sql = '';
@@ -2312,7 +2312,7 @@ 
         if ($search_all_sessions == true) {
             $conditions = array(
                 'where' => array(
-                    $active_sql . ' c_id = ? ' . $needle_where . $time_conditions => array(
+                    $active_sql.' c_id = ? '.$needle_where.$time_conditions => array(
                         $course_id,
                         $needle
                     )
@@ -2323,7 +2323,7 @@ 
             if ($session_id == 0) {
                 $conditions = array(
                     'where' => array(
-                        $active_sql . ' session_id = ? AND c_id = ? ' . $needle_where . $time_conditions => array(
+                        $active_sql.' session_id = ? AND c_id = ? '.$needle_where.$time_conditions => array(
                             $session_id,
                             $course_id,
                             $needle
@@ -2334,7 +2334,7 @@ 
             } else {
                 $conditions = array(
                     'where' => array(
-                        $active_sql . ' (session_id = 0 OR session_id = ? ) AND c_id = ? ' . $needle_where . $time_conditions => array(
+                        $active_sql.' (session_id = 0 OR session_id = ? ) AND c_id = ? '.$needle_where.$time_conditions => array(
                             $session_id,
                             $course_id,
                             $needle
@@ -2513,7 +2513,7 @@ 
 
             if ($return_string) {
                 if (!empty($position) && !empty($my_ranking)) {
-                    $return_value = $position . '/' . count($my_ranking);
+                    $return_value = $position.'/'.count($my_ranking);
                 } else {
                     $return_value = '-';
                 }
@@ -2593,7 +2593,7 @@ 
 
             if ($return_string) {
                 if (!empty($position) && !empty($my_ranking)) {
-                    return $position . '/' . count($my_ranking);
+                    return $position.'/'.count($my_ranking);
                 }
             }
             return $return_value;
@@ -2993,7 +2993,7 @@ 
             $courseCondition = "
             INNER JOIN $courseUser cu
             ON cu.c_id = c.id AND cu.user_id  = exe_user_id";
-            $courseConditionWhere = " AND relation_type <> 2 AND cu.status = " . STUDENT;
+            $courseConditionWhere = " AND relation_type <> 2 AND cu.status = ".STUDENT;
         } else {
             $courseCondition = "
             INNER JOIN $courseUserSession cu
@@ -3068,7 +3068,7 @@ 
             $courseCondition = "
             INNER JOIN $courseUser cu
             ON cu.c_id = c.id AND cu.user_id  = exe_user_id";
-            $courseConditionWhere = " AND relation_type <> 2 AND cu.status = " . STUDENT;
+            $courseConditionWhere = " AND relation_type <> 2 AND cu.status = ".STUDENT;
         } else {
             $courseCondition = "
             INNER JOIN $courseUserSession cu
@@ -3160,7 +3160,7 @@ 
             $courseCondition = "
             INNER JOIN $courseUser cu
             ON cu.c_id = c.id AND cu.user_id  = exe_user_id";
-            $courseConditionWhere = " AND relation_type <> 2 AND cu.status = " . STUDENT;
+            $courseConditionWhere = " AND relation_type <> 2 AND cu.status = ".STUDENT;
         } else {
             $courseCondition = "
             INNER JOIN $courseUserSession cu
@@ -3342,7 +3342,7 @@ 
                 }
             }
             // adds the correct word, followed by ] to close the blank
-            $answer .= ' / <font color="green"><b>' . $real_correct_tags[$i] . '</b></font>]';
+            $answer .= ' / <font color="green"><b>'.$real_correct_tags[$i].'</b></font>]';
             if (isset ($real_text[$i + 1])) {
                 $answer .= $real_text[$i + 1];
             }
@@ -3401,13 +3401,13 @@ 
         // check the default value of option
         $tabSelected = array($in_default => " selected='selected' ");
         $res = "";
-        $res .= "<select name='$in_name' id='$in_name' onchange='" . $in_onchange . "' >";
-        $res .= "<option value='-1'" . $tabSelected["-1"] . ">-- " . get_lang(
+        $res .= "<select name='$in_name' id='$in_name' onchange='".$in_onchange."' >";
+        $res .= "<option value='-1'".$tabSelected["-1"].">-- ".get_lang(
                 'AllGroups'
-            ) . " --</option>";
-        $res .= "<option value='0'" . $tabSelected["0"] . ">- " . get_lang(
+            )." --</option>";
+        $res .= "<option value='0'".$tabSelected["0"].">- ".get_lang(
                 'NotInAGroup'
-            ) . " -</option>";
+            )." -</option>";
         $tabGroups = GroupManager::get_group_list();
         $currentCatId = 0;
         for ($i = 0; $i < count($tabGroups); $i++) {
@@ -3415,10 +3415,10 @@ 
                 $tabGroups[$i]["id"]
             );
             if ($tabCategory["id"] != $currentCatId) {
-                $res .= "<option value='-1' disabled='disabled'>" . $tabCategory["title"] . "</option>";
+                $res .= "<option value='-1' disabled='disabled'>".$tabCategory["title"]."</option>";
                 $currentCatId = $tabCategory["id"];
             }
-            $res .= "<option " . $tabSelected[$tabGroups[$i]["id"]] . "style='margin-left:40px' value='" . $tabGroups[$i]["id"] . "'>" . $tabGroups[$i]["name"] . "</option>";
+            $res .= "<option ".$tabSelected[$tabGroups[$i]["id"]]."style='margin-left:40px' value='".$tabGroups[$i]["id"]."'>".$tabGroups[$i]["name"]."</option>";
         }
         $res .= "</select>";
         return $res;
@@ -3651,14 +3651,14 @@ 
                 if ($show_results) {
                     $comnt = Event::get_comments($exe_id, $questionId);
                     if (!empty($comnt)) {
-                        echo '<b>' . get_lang('Feedback') . '</b>';
-                        echo '<div id="question_feedback">' . $comnt . '</div>';
+                        echo '<b>'.get_lang('Feedback').'</b>';
+                        echo '<div id="question_feedback">'.$comnt.'</div>';
                     }
                 }
 
                 if ($show_results) {
                     $score = array(
-                        'result' => get_lang('Score') . " : " . self::show_score(
+                        'result' => get_lang('Score')." : ".self::show_score(
                                 $my_total_score,
                                 $my_total_weight,
                                 false,
@@ -3726,13 +3726,13 @@ 
         }
 
         if ($show_all_but_expected_answer) {
-            $exercise_content .= "<div class='normal-message'>" . get_lang(
+            $exercise_content .= "<div class='normal-message'>".get_lang(
                     "ExerciseWithFeedbackWithoutCorrectionComment"
-                ) . "</div>";
+                )."</div>";
         }
         // Remove audio auto play from questions on results page - refs BT#7939
         $exercise_content = preg_replace(
-            ['/autoplay[\=\".+\"]+/','/autostart[\=\".+\"]+/'],
+            ['/autoplay[\=\".+\"]+/', '/autostart[\=\".+\"]+/'],
             '',
             $exercise_content
         );
@@ -3826,11 +3826,11 @@ 
                     $ribbon_total_success_or_error = ' ribbon-total-error';
                 }
             }
-            $ribbon .= '<div class="total ' . $ribbon_total_success_or_error . '">';
+            $ribbon .= '<div class="total '.$ribbon_total_success_or_error.'">';
         } else {
             $ribbon .= '<div class="total">';
         }
-        $ribbon .= '<h3>' . get_lang('YourTotalScore') . ":&nbsp;";
+        $ribbon .= '<h3>'.get_lang('YourTotalScore').":&nbsp;";
         $ribbon .= self::show_score($score, $weight, false, true);
         $ribbon .= '</h3>';
         $ribbon .= '</div>';