chamilo / chamilo-lms

main/newscorm/lp_final_item.php

Spacing +10 added lines, -10 removed lines

@@ -8,7 +8,7 @@ 
 // Initialize context
 $_in_course = true;
 
-require_once __DIR__ . '/../inc/global.inc.php';
+require_once __DIR__.'/../inc/global.inc.php';
 
 $current_course_tool = TOOL_GRADEBOOK;
 
@@ -170,19 +170,19 @@ 
                 <div class='row'>
                     <div class='col-md-2 col-xs-4'>
                         <div class='thumbnail'>
-                          <img class='skill-badge-img' src='" . $skill->getWebIconPath() . "' >
+                          <img class='skill-badge-img' src='" . $skill->getWebIconPath()."' >
                         </div>
                     </div>
                     <div class='col-md-8 col-xs-8'>
-                        <h5><b>" . $skill->getName() . "</b></h5>
-                        " . $skill->getDescription() . "
+                        <h5><b>" . $skill->getName()."</b></h5>
+                        " . $skill->getDescription()."
                     </div>
                     <div class='col-md-2 col-xs-12'>
-                        <h5><b>" . get_lang('ShareWithYourFriends') . "</b></h5>
-                        <a href='http://www.facebook.com/sharer.php?u=" . api_get_path(WEB_PATH) . "badge/" . $skill->getId() . "/user/" . $userId . "' target='_new'>
+                        <h5><b>" . get_lang('ShareWithYourFriends')."</b></h5>
+                        <a href='http://www.facebook.com/sharer.php?u=" . api_get_path(WEB_PATH)."badge/".$skill->getId()."/user/".$userId."' target='_new'>
                             <em class='fa fa-facebook-square fa-3x text-info' aria-hidden='true'></em>
                         </a>
-                        <a href='https://twitter.com/home?status=" . sprintf(get_lang('IHaveObtainedSkillXOnY'), '"' . $skill->getName() . '"', api_get_setting('siteName')) . ' - ' . api_get_path(WEB_PATH) . 'badge/' . $skill->getId() . '/user/' . $userId . "' target='_new'>
+                        <a href='https://twitter.com/home?status=" . sprintf(get_lang('IHaveObtainedSkillXOnY'), '"'.$skill->getName().'"', api_get_setting('siteName')).' - '.api_get_path(WEB_PATH).'badge/'.$skill->getId().'/user/'.$userId."' target='_new'>
                             <em class='fa fa-twitter-square fa-3x text-light' aria-hidden='true'></em>
                         </a>
                     </div>
@@ -192,7 +192,7 @@ 
         $badgeLink .= "
             <div class='panel panel-default'>
                 <div class='panel-body'>
-                    <h3 class='text-center'>" . get_lang('AdditionallyYouHaveObtainedTheFollowingSkills') . "</h3>
+                    <h3 class='text-center'>" . get_lang('AdditionallyYouHaveObtainedTheFollowingSkills')."</h3>
                     $skillList
                 </div>
             </div>
@@ -209,7 +209,7 @@ 
 function generateLPFinalItemTemplateCertificateLinks($certificate)
 {
     $downloadCertificateLink = Display::url(
-        Display::returnFontAwesomeIcon('file-pdf-o') . get_lang('DownloadCertificatePdf'),
+        Display::returnFontAwesomeIcon('file-pdf-o').get_lang('DownloadCertificatePdf'),
         $certificate['pdf_url'],
         ['class' => 'btn btn-default']
     );
@@ -217,7 +217,7 @@ 
     $downloadCertificateLink = "
         <div class='panel panel-default'>
             <div class='panel-body'>
-                <h3 class='text-center'>" . get_lang('NowDownloadYourCertificateClickHere') . "</h3>
+                <h3 class='text-center'>" . get_lang('NowDownloadYourCertificateClickHere')."</h3>
                 <div class='text-center'>$downloadCertificateLink $viewCertificateLink</div>
             </div>
         </div>

main/inc/lib/document.lib.php

Spacing +335 added lines, -335 removed lines

@@ -290,7 +290,7 @@ 
             return true;
         } else {
             $tbl_document = Database::get_course_table(TABLE_DOCUMENT);
-            $tbl_item_property = $this_course . 'item_property';
+            $tbl_item_property = $this_course.'item_property';
             $doc_url = Database::escape_string($doc_url);
             $query = "SELECT 1 FROM $tbl_document AS docs,$tbl_item_property AS props
                       WHERE
@@ -340,18 +340,18 @@ 
             }
 
             header('Content-type: application/octet-stream');
-            header('Content-length: ' . $len);
+            header('Content-length: '.$len);
             if (preg_match("/MSIE 5.5/", $_SERVER['HTTP_USER_AGENT'])) {
-                header('Content-Disposition: filename= ' . $filename);
+                header('Content-Disposition: filename= '.$filename);
             } else {
-                header('Content-Disposition: attachment; filename= ' . $filename);
+                header('Content-Disposition: attachment; filename= '.$filename);
             }
             if (strpos($_SERVER['HTTP_USER_AGENT'], 'MSIE')) {
                 header('Pragma: ');
                 header('Cache-Control: ');
                 header('Cache-Control: public'); // IE cannot download from sessions without a cache
             }
-            header('Content-Description: ' . $filename);
+            header('Content-Description: '.$filename);
             header('Content-Transfer-Encoding: binary');
 
             $res = fopen($full_file_name, 'r');
@@ -365,7 +365,7 @@ 
             $lpFixedEncoding = api_get_configuration_value('lp_fixed_encoding');
 
             header('Expires: Wed, 01 Jan 1990 00:00:00 GMT');
-            header('Last-Modified: ' . gmdate('D, d M Y H:i:s') . ' GMT');
+            header('Last-Modified: '.gmdate('D, d M Y H:i:s').' GMT');
             // Commented to avoid double caching declaration when playing with IE and HTTPS
             //header('Cache-Control: no-cache, must-revalidate');
             //header('Pragma: no-cache');
@@ -376,7 +376,7 @@ 
                     } else {
                         $encoding = @api_detect_encoding_html(file_get_contents($full_file_name));
                         if (!empty($encoding)) {
-                            $content_type .= '; charset=' . $encoding;
+                            $content_type .= '; charset='.$encoding;
                         }
                     }
                     break;
@@ -386,7 +386,7 @@ 
                     } else {
                         $encoding = @api_detect_encoding(strip_tags(file_get_contents($full_file_name)));
                         if (!empty($encoding)) {
-                            $content_type .= '; charset=' . $encoding;
+                            $content_type .= '; charset='.$encoding;
                         }
                     }
                     break;
@@ -395,13 +395,13 @@ 
                     header('Content-type: application/octet-stream');
                     break;
             }
-            header('Content-type: ' . $content_type);
-            header('Content-Length: ' . $len);
+            header('Content-type: '.$content_type);
+            header('Content-Length: '.$len);
             $user_agent = strtolower($_SERVER['HTTP_USER_AGENT']);
             if (strpos($user_agent, 'msie')) {
-                header('Content-Disposition: ; filename= ' . $filename);
+                header('Content-Disposition: ; filename= '.$filename);
             } else {
-                header('Content-Disposition: inline; filename= ' . $filename);
+                header('Content-Disposition: inline; filename= '.$filename);
             }
 
             if ($fixLinksHttpToHttps) {
@@ -442,18 +442,18 @@ 
 
             header('Content-type: application/octet-stream');
             //header('Content-Type: application/force-download');
-            header('Content-length: ' . $len);
+            header('Content-length: '.$len);
             if (preg_match("/MSIE 5.5/", $_SERVER['HTTP_USER_AGENT'])) {
-                header('Content-Disposition: filename= ' . $filename);
+                header('Content-Disposition: filename= '.$filename);
             } else {
-                header('Content-Disposition: attachment; filename= ' . $filename);
+                header('Content-Disposition: attachment; filename= '.$filename);
             }
             if (strpos($_SERVER['HTTP_USER_AGENT'], 'MSIE')) {
                 header('Pragma: ');
                 header('Cache-Control: ');
                 header('Cache-Control: public'); // IE cannot download from sessions without a cache
             }
-            header('Content-Description: ' . $filename);
+            header('Content-Description: '.$filename);
             header('Content-transfer-encoding: binary');
             echo $full_string;
 
@@ -466,30 +466,30 @@ 
 
             $content_type = self::file_get_mime_type($filename);
             header('Expires: Wed, 01 Jan 1990 00:00:00 GMT');
-            header('Last-Modified: ' . gmdate('D, d M Y H:i:s') . ' GMT');
+            header('Last-Modified: '.gmdate('D, d M Y H:i:s').' GMT');
             header('Cache-Control: no-cache, must-revalidate');
             header('Pragma: no-cache');
             switch ($content_type) {
                 case 'text/html':
                     $encoding = @api_detect_encoding_html($full_string);
                     if (!empty($encoding)) {
-                        $content_type .= '; charset=' . $encoding;
+                        $content_type .= '; charset='.$encoding;
                     }
                     break;
                 case 'text/plain':
                     $encoding = @api_detect_encoding(strip_tags($full_string));
                     if (!empty($encoding)) {
-                        $content_type .= '; charset=' . $encoding;
+                        $content_type .= '; charset='.$encoding;
                     }
                     break;
             }
-            header('Content-type: ' . $content_type);
-            header('Content-Length: ' . $len);
+            header('Content-type: '.$content_type);
+            header('Content-Length: '.$len);
             $user_agent = strtolower($_SERVER['HTTP_USER_AGENT']);
             if (strpos($user_agent, 'msie')) {
-                header('Content-Disposition: ; filename= ' . $filename);
+                header('Content-Disposition: ; filename= '.$filename);
             } else {
-                header('Content-Disposition: inline; filename= ' . $filename);
+                header('Content-Disposition: inline; filename= '.$filename);
             }
             echo($full_string);
             //You have to ensure that the calling script then stops processing (exit();)
@@ -582,9 +582,9 @@ 
             if (!empty($students)) {
                 $conditionList = array();
                 foreach ($students as $studentId => $studentInfo) {
-                    $conditionList[] = '/shared_folder/sf_user_' . $studentInfo['user_id'];
+                    $conditionList[] = '/shared_folder/sf_user_'.$studentInfo['user_id'];
                 }
-                $sharedCondition .= ' AND docs.path IN ("' . implode('","', $conditionList) . '")';
+                $sharedCondition .= ' AND docs.path IN ("'.implode('","', $conditionList).'")';
             }
         }
 
@@ -610,8 +610,8 @@ 
                     last.c_id = {$_course['real_id']}
                 )
                 WHERE
-                    docs.path LIKE '" . Database::escape_string($path . $added_slash.'%'). "' AND
-                    docs.path NOT LIKE '" . Database::escape_string($path . $added_slash.'%/%')."' AND
+                    docs.path LIKE '".Database::escape_string($path.$added_slash.'%')."' AND
+                    docs.path NOT LIKE '" . Database::escape_string($path.$added_slash.'%/%')."' AND
                     docs.path NOT LIKE '%_DELETED_%' AND
                     $userGroupFilter AND
                     last.visibility $visibility_bit
@@ -652,7 +652,7 @@ 
                     $table_template = Database::get_main_table(TABLE_MAIN_TEMPLATES);
                     $sql = "SELECT id FROM $table_template
                             WHERE
-                                course_code = '" . $_course['code'] . "' AND
+                                course_code = '".$_course['code']."' AND
                                 user_id = '".api_get_user_id()."' AND
                                 ref_doc = '".$row['id']."'";
                     $template_result = Database::query($sql);
@@ -762,7 +762,7 @@ 
         if (!empty($students)) {
             $conditionList = array();
             foreach ($students as $studentId => $studentInfo) {
-                $conditionList[] = '/shared_folder/sf_user_' . $studentInfo['user_id'];
+                $conditionList[] = '/shared_folder/sf_user_'.$studentInfo['user_id'];
             }
         }
 
@@ -786,7 +786,7 @@ 
                        INNER JOIN $TABLE_DOCUMENT  AS docs
                        ON (
                             docs.id = last.ref AND
-                            last.tool = '" . TOOL_DOCUMENT . "' AND
+                            last.tool = '".TOOL_DOCUMENT."' AND
                             last.c_id = {$_course['real_id']} AND
                             docs.c_id = {$_course['real_id']}
                        )
@@ -803,7 +803,7 @@ 
                         INNER JOIN $TABLE_DOCUMENT  AS docs
                         ON (
                             docs.id = last.ref AND
-                            last.tool = '" . TOOL_DOCUMENT . "' AND
+                            last.tool = '".TOOL_DOCUMENT."' AND
                             last.c_id = {$_course['real_id']} AND
                             docs.c_id = {$_course['real_id']}
                         )
@@ -850,7 +850,7 @@ 
                     WHERE
                         docs.id = last.ref AND
                         docs.filetype = 'folder' AND
-                        last.tool = '" . TOOL_DOCUMENT . "' AND
+                        last.tool = '".TOOL_DOCUMENT."' AND
                         $groupCondition AND
                         last.visibility = 1
                         $condition_session AND
@@ -871,7 +871,7 @@ 
                     WHERE
                         docs.id = last.ref AND
                         docs.filetype = 'folder' AND
-                        last.tool = '" . TOOL_DOCUMENT . "' AND
+                        last.tool = '".TOOL_DOCUMENT."' AND
                         $groupCondition AND
                         last.visibility = 0 $condition_session AND
                         last.c_id = {$_course['real_id']} AND
@@ -887,9 +887,9 @@ 
                         FROM $TABLE_ITEMPROPERTY AS last, $TABLE_DOCUMENT AS docs
                         WHERE
                             docs.id = last.ref AND
-                            docs.path LIKE '" . Database::escape_string($row['path'].'/%') . "' AND
+                            docs.path LIKE '".Database::escape_string($row['path'].'/%')."' AND
                             docs.filetype = 'folder' AND
-                            last.tool = '" . TOOL_DOCUMENT . "' AND
+                            last.tool = '" . TOOL_DOCUMENT."' AND
                             $groupCondition AND
                             last.visibility = 1 $condition_session AND
                             last.c_id = {$_course['real_id']} AND
@@ -966,7 +966,7 @@ 
                                 tp.c_id = $course_id AND
                                 td.session_id = $sessionId AND
                                 tp.ref= td.id AND
-                                (path='" . $path . "' OR path LIKE BINARY '" . $path . "/%' ) ";
+                                (path='".$path."' OR path LIKE BINARY '".$path."/%' ) ";
                     // Get all id's of documents that are deleted
                     $what_to_check_result = Database::query($sql);
 
@@ -1308,7 +1308,7 @@ 
             $res = Database::query($sql);
             if (Database::num_rows($res) > 0) {
                 $row2 = Database::fetch_array($res);
-                require_once api_get_path(LIBRARY_PATH) . 'search/ChamiloIndexer.class.php';
+                require_once api_get_path(LIBRARY_PATH).'search/ChamiloIndexer.class.php';
                 $di = new ChamiloIndexer();
                 $di->remove_document((int) $row2['search_did']);
             }
@@ -1317,7 +1317,7 @@ 
             Database::query($sql);
 
             // remove terms from db
-            require_once api_get_path(LIBRARY_PATH) . 'specific_fields_manager.lib.php';
+            require_once api_get_path(LIBRARY_PATH).'specific_fields_manager.lib.php';
             delete_all_values_for_item($course_id, TOOL_DOCUMENT, $document_id);
         }
     }
@@ -1406,12 +1406,12 @@ 
             $path = str_replace('%2F', '/', $url_path);
             $pathinfo = pathinfo($row['path']);
 
-            $row['url'] = api_get_path(WEB_CODE_PATH) . 'document/showinframes.php?cidReq=' . $course_code . '&id=' . $id;
-            $row['document_url'] = api_get_path(WEB_CODE_PATH) . 'document/document.php?cidReq=' . $course_code . '&id=' . $id;
-            $row['absolute_path'] = api_get_path(SYS_COURSE_PATH) . $course_info['path'] . '/document' . $row['path'];
-            $row['absolute_path_from_document'] = '/document' . $row['path'];
-            $row['absolute_parent_path'] = api_get_path(SYS_COURSE_PATH).$course_info['path'].'/document'.$pathinfo['dirname'] . '/';
-            $row['direct_url'] = $www . $path;
+            $row['url'] = api_get_path(WEB_CODE_PATH).'document/showinframes.php?cidReq='.$course_code.'&id='.$id;
+            $row['document_url'] = api_get_path(WEB_CODE_PATH).'document/document.php?cidReq='.$course_code.'&id='.$id;
+            $row['absolute_path'] = api_get_path(SYS_COURSE_PATH).$course_info['path'].'/document'.$row['path'];
+            $row['absolute_path_from_document'] = '/document'.$row['path'];
+            $row['absolute_parent_path'] = api_get_path(SYS_COURSE_PATH).$course_info['path'].'/document'.$pathinfo['dirname'].'/';
+            $row['direct_url'] = $www.$path;
 
             if (dirname($row['path']) == '.') {
                 $row['parent_id'] = '0';
@@ -1430,7 +1430,7 @@ 
                 $real_dir = '';
 
                 for ($i = 1; $i < $array_len; $i++) {
-                    $real_dir .= '/' . $dir_array[$i];
+                    $real_dir .= '/'.$dir_array[$i];
                     $parent_id = self::get_document_id($course_info, $real_dir);
                     if ($session_id != 0 && empty($parent_id)) {
                         $parent_id = self::get_document_id($course_info, $real_dir, 0);
@@ -1504,21 +1504,21 @@ 
         $user_id = intval($user_id);
         $document_id = intval($document_id);
 
-        $sql = 'SELECT id FROM ' . $table_template . '
+        $sql = 'SELECT id FROM '.$table_template.'
                 WHERE
-                    course_code="' . $course_code . '" AND
-                    user_id="' . $user_id . '" AND
-                    ref_doc="' . $document_id . '"';
+                    course_code="' . $course_code.'" AND
+                    user_id="' . $user_id.'" AND
+                    ref_doc="' . $document_id.'"';
         $result = Database::query($sql);
         $template_id = Database::result($result, 0, 0);
 
-        my_delete(api_get_path(SYS_CODE_PATH) . 'upload/template_thumbnails/' . $template_id . '.jpg');
+        my_delete(api_get_path(SYS_CODE_PATH).'upload/template_thumbnails/'.$template_id.'.jpg');
 
-        $sql = 'DELETE FROM ' . $table_template . '
+        $sql = 'DELETE FROM '.$table_template.'
                 WHERE
-                    course_code="' . $course_code . '" AND
-                    user_id="' . $user_id . '" AND
-                    ref_doc="' . $document_id . '"';
+                    course_code="' . $course_code.'" AND
+                    user_id="' . $user_id.'" AND
+                    ref_doc="' . $document_id.'"';
 
         Database::query($sql);
     }
@@ -1578,9 +1578,9 @@ 
                 INNER JOIN $propTable ip
                 ON (d.id = ip.ref AND d.c_id  = $course_id AND ip.c_id = $course_id)
         		WHERE
-        		    ip.tool = '" . TOOL_DOCUMENT . "' $condition AND
+        		    ip.tool = '".TOOL_DOCUMENT."' $condition AND
         			filetype = '$file_type' AND
-        			locate(concat(path,'/'), '" . Database::escape_string($doc_path.'/'). "')=1
+        			locate(concat(path,'/'), '".Database::escape_string($doc_path.'/')."')=1
                 ";
 
         $result = Database::query($sql);
@@ -1743,12 +1743,12 @@ 
         if (empty($session_id)) {
             $sql_session = 'AND (session_id = 0 OR isnull(session_id)) ';
         } elseif ($session_id > 0) {
-            $sql_session = 'AND session_id=' . intval($session_id);
+            $sql_session = 'AND session_id='.intval($session_id);
         } else {
             $sql_session = '';
         }
-        $sql = 'UPDATE ' . $tbl_category . ' SET document_id="' . intval($document_id) . '"
-                WHERE course_code="' . Database::escape_string($course_id) . '" ' . $sql_session;
+        $sql = 'UPDATE '.$tbl_category.' SET document_id="'.intval($document_id).'"
+                WHERE course_code="' . Database::escape_string($course_id).'" '.$sql_session;
         Database::query($sql);
     }
 
@@ -1770,12 +1770,12 @@ 
         if (empty($session_id)) {
             $sql_session = 'AND (session_id = 0 OR isnull(session_id)) ';
         } elseif ($session_id > 0) {
-            $sql_session = 'AND session_id=' . intval($session_id);
+            $sql_session = 'AND session_id='.intval($session_id);
         } else {
             $sql_session = '';
         }
-        $sql = 'SELECT document_id FROM ' . $tbl_category . '
-                WHERE course_code="' . Database::escape_string($course_id) . '" ' . $sql_session;
+        $sql = 'SELECT document_id FROM '.$tbl_category.'
+                WHERE course_code="' . Database::escape_string($course_id).'" '.$sql_session;
 
         $rs = Database::query($sql);
         $num = Database::num_rows($rs);
@@ -1816,7 +1816,7 @@ 
             $all_user_info = array();
             if (Database::num_rows($rs)) {
                 $row = Database::fetch_array($rs);
-                $filepath = api_get_path(SYS_COURSE_PATH) . $course_info['path'] . '/document' . $row['path'];
+                $filepath = api_get_path(SYS_COURSE_PATH).$course_info['path'].'/document'.$row['path'];
                 if (is_file($filepath)) {
                     $my_content_html = file_get_contents($filepath);
                 }
@@ -1899,9 +1899,9 @@ 
             $date_no_time = api_convert_and_format_date(api_get_utc_datetime(), DATE_FORMAT_LONG_NO_DAY);
         }
 
-        $url = api_get_path(WEB_PATH) . 'certificates/index.php?id=' . $info_grade_certificate['id'];
+        $url = api_get_path(WEB_PATH).'certificates/index.php?id='.$info_grade_certificate['id'];
 
-        $externalStyleFile = api_get_path(SYS_CSS_PATH) . 'themes/' . api_get_visual_theme() . '/certificate.css';
+        $externalStyleFile = api_get_path(SYS_CSS_PATH).'themes/'.api_get_visual_theme().'/certificate.css';
         $externalStyle = '';
 
         if (is_file($externalStyleFile)) {
@@ -1923,7 +1923,7 @@ 
             $course_info['name'],
             $info_grade_certificate['grade'],
             $url,
-            '<a href="' . $url . '" target="_blank">' . get_lang('CertificateOnlineLink') . '</a>',
+            '<a href="'.$url.'" target="_blank">'.get_lang('CertificateOnlineLink').'</a>',
             '((certificate_barcode))',
             $externalStyle
         );
@@ -1949,7 +1949,7 @@ 
         if (!empty($extraFields)) {
             foreach ($extraFields as $extraField) {
                 $valueExtra = isset($extra_user_info_data[$extraField['variable']]) ? $extra_user_info_data[$extraField['variable']] : '';
-                $info_to_be_replaced_in_content_html[] = '((' . strtolower($extraField['variable']) . '))';
+                $info_to_be_replaced_in_content_html[] = '(('.strtolower($extraField['variable']).'))';
                 $info_to_replace_in_content_html[] = $valueExtra;
             }
         }
@@ -1977,17 +1977,17 @@ 
             $tbl_category = Database :: get_main_table(TABLE_MAIN_GRADEBOOK_CATEGORY);
             $session_id = api_get_session_id();
             if ($session_id == 0 || is_null($session_id)) {
-                $sql_session = 'AND (session_id=' . intval($session_id) . ' OR isnull(session_id)) ';
+                $sql_session = 'AND (session_id='.intval($session_id).' OR isnull(session_id)) ';
             } elseif ($session_id > 0) {
-                $sql_session = 'AND session_id=' . intval($session_id);
+                $sql_session = 'AND session_id='.intval($session_id);
             } else {
                 $sql_session = '';
             }
 
-            $sql = 'UPDATE ' . $tbl_category . ' SET document_id=null
+            $sql = 'UPDATE '.$tbl_category.' SET document_id=null
                     WHERE
-                        course_code = "' . Database::escape_string($course_id) . '" AND
-                        document_id="' . $default_certificate_id . '" ' . $sql_session;
+                        course_code = "' . Database::escape_string($course_id).'" AND
+                        document_id="' . $default_certificate_id.'" '.$sql_session;
             Database::query($sql);
         }
     }
@@ -2003,10 +2003,10 @@ 
         if (!empty($courseInfo)) {
             $to_group_id = 0;
             $to_user_id = null;
-            $course_dir = $courseInfo['path'] . "/document/";
+            $course_dir = $courseInfo['path']."/document/";
             $sys_course_path = api_get_path(SYS_COURSE_PATH);
-            $base_work_dir = $sys_course_path . $course_dir;
-            $base_work_dir_test = $base_work_dir . 'certificates';
+            $base_work_dir = $sys_course_path.$course_dir;
+            $base_work_dir_test = $base_work_dir.'certificates';
             $dir_name = '/certificates';
             $post_dir_name = get_lang('CertificatesFiles');
             $visibility_command = 'invisible';
@@ -2233,9 +2233,9 @@ 
                                             //$new_abs_path = realpath($dir.'/'.$second_part);
                                             $dir = '';
                                             if (!empty($abs_path)) {
-                                                $dir = dirname($abs_path) . '/';
+                                                $dir = dirname($abs_path).'/';
                                             }
-                                            $new_abs_path = realpath($dir . $second_part);
+                                            $new_abs_path = realpath($dir.$second_part);
                                             $in_files_list[] = self::get_resources_from_source_html($new_abs_path, true, TOOL_DOCUMENT, $recursivity + 1);
                                             if (count($in_files_list) > 0) {
                                                 $files_list = array_merge($files_list, $in_files_list);
@@ -2248,9 +2248,9 @@ 
                                             $files_list[] = array($second_part, 'local', 'rel');
                                             $dir = '';
                                             if (!empty($abs_path)) {
-                                                $dir = dirname($abs_path) . '/';
+                                                $dir = dirname($abs_path).'/';
                                             }
-                                            $new_abs_path = realpath($dir . $second_part);
+                                            $new_abs_path = realpath($dir.$second_part);
                                             $in_files_list[] = self::get_resources_from_source_html($new_abs_path, true, TOOL_DOCUMENT, $recursivity + 1);
                                             if (count($in_files_list) > 0) {
                                                 $files_list = array_merge($files_list, $in_files_list);
@@ -2284,9 +2284,9 @@ 
                                             $files_list[] = array($source, 'local', 'rel');
                                             $dir = '';
                                             if (!empty($abs_path)) {
-                                                $dir = dirname($abs_path) . '/';
+                                                $dir = dirname($abs_path).'/';
                                             }
-                                            $new_abs_path = realpath($dir . $source);
+                                            $new_abs_path = realpath($dir.$source);
                                             $in_files_list[] = self::get_resources_from_source_html($new_abs_path, true, TOOL_DOCUMENT, $recursivity + 1);
                                             if (count($in_files_list) > 0) {
                                                 $files_list = array_merge($files_list, $in_files_list);
@@ -2299,9 +2299,9 @@ 
                                             $files_list[] = array($source, 'local', 'rel');
                                             $dir = '';
                                             if (!empty($abs_path)) {
-                                                $dir = dirname($abs_path) . '/';
+                                                $dir = dirname($abs_path).'/';
                                             }
-                                            $new_abs_path = realpath($dir . $source);
+                                            $new_abs_path = realpath($dir.$source);
                                             $in_files_list[] = self::get_resources_from_source_html($new_abs_path, true, TOOL_DOCUMENT, $recursivity + 1);
                                             if (count($in_files_list) > 0) {
                                                 $files_list = array_merge($files_list, $in_files_list);
@@ -2335,9 +2335,9 @@ 
                                     $files_list[] = array($source, 'local', 'rel');
                                     $dir = '';
                                     if (!empty($abs_path)) {
-                                        $dir = dirname($abs_path) . '/';
+                                        $dir = dirname($abs_path).'/';
                                     }
-                                    $new_abs_path = realpath($dir . $source);
+                                    $new_abs_path = realpath($dir.$source);
                                     $in_files_list[] = self::get_resources_from_source_html($new_abs_path, true, TOOL_DOCUMENT, $recursivity + 1);
                                     if (count($in_files_list) > 0) {
                                         $files_list = array_merge($files_list, $in_files_list);
@@ -2350,9 +2350,9 @@ 
                                     $files_list[] = array($source, 'local', 'rel');
                                     $dir = '';
                                     if (!empty($abs_path)) {
-                                        $dir = dirname($abs_path) . '/';
+                                        $dir = dirname($abs_path).'/';
                                     }
-                                    $new_abs_path = realpath($dir . $source);
+                                    $new_abs_path = realpath($dir.$source);
                                     $in_files_list[] = self::get_resources_from_source_html($new_abs_path, true, TOOL_DOCUMENT, $recursivity + 1);
                                     if (count($in_files_list) > 0) {
                                         $files_list = array_merge($files_list, $in_files_list);
@@ -2410,24 +2410,24 @@ 
             // then possible closing brackets if we were in the opening bracket case
             // OR something like @import()
             $res = preg_match_all(
-                '/(((([A-Za-z_:])([A-Za-z0-9_:\.-]*))' .
+                '/(((([A-Za-z_:])([A-Za-z0-9_:\.-]*))'.
                 // '/(((([A-Za-z_:])([A-Za-z0-9_:\.-]|[^\x00-\x7F])*)' . -> seems to be taking too much
                 // '/(((([A-Za-z_:])([^\x00-\x7F])*)' . -> takes only last letter of parameter name
-                '([ \n\t\r]+)?(' .
+                '([ \n\t\r]+)?('.
                 // '(=([ \n\t\r]+)?("[^"]+"|\'[^\']+\'|[^ \n\t\r]+))' . -> doesn't restrict close enough to the url itself
-                '(=([ \n\t\r]+)?("[^"\)]+"|\'[^\'\)]+\'|[^ \n\t\r\)]+))' .
-                '|' .
+                '(=([ \n\t\r]+)?("[^"\)]+"|\'[^\'\)]+\'|[^ \n\t\r\)]+))'.
+                '|'.
                 // '(\(([ \n\t\r]+)?("[^"]+"|\'[^\']+\'|[^ \n\t\r]+)\))' . -> doesn't restrict close enough to the url itself
-                '(\(([ \n\t\r]+)?("[^"\)]+"|\'[^\'\)]+\'|[^ \n\t\r\)]+)\))' .
-                '))' .
-                '|' .
+                '(\(([ \n\t\r]+)?("[^"\)]+"|\'[^\'\)]+\'|[^ \n\t\r\)]+)\))'.
+                '))'.
+                '|'.
                 // '(@import([ \n\t\r]+)?("[^"]+"|\'[^\']+\'|[^ \n\t\r]+)))?/', -> takes a lot (like 100's of thousands of empty possibilities)
                 '(@import([ \n\t\r]+)?("[^"]+"|\'[^\']+\'|[^ \n\t\r]+)))/',
                 $attrString,
                 $regs
             );
         } catch (Exception $e) {
-            error_log('Caught exception: ' . $e->getMessage(), 0);
+            error_log('Caught exception: '.$e->getMessage(), 0);
         }
         if ($res) {
             for ($i = 0; $i < count($regs[1]); $i++) {
@@ -2505,14 +2505,14 @@ 
                 $orig_course_info_path = $origin_course_info_path;
             }
         } else {
-            $orig_course_path = api_get_path(SYS_COURSE_PATH).$orig_course_info['path'] . '/';
+            $orig_course_path = api_get_path(SYS_COURSE_PATH).$orig_course_info['path'].'/';
             $orig_course_info_path = $orig_course_info['path'];
         }
 
         $destination_course_code = CourseManager::get_course_id_from_path($destination_course_directory);
         $destination_course_info = api_get_course_info($destination_course_code);
-        $dest_course_path = api_get_path(SYS_COURSE_PATH) . $destination_course_directory . '/';
-        $dest_course_path_rel = api_get_path(REL_COURSE_PATH) . $destination_course_directory . '/';
+        $dest_course_path = api_get_path(SYS_COURSE_PATH).$destination_course_directory.'/';
+        $dest_course_path_rel = api_get_path(REL_COURSE_PATH).$destination_course_directory.'/';
 
         $user_id = api_get_user_id();
 
@@ -2521,7 +2521,7 @@ 
 
                 // Get information about source url
                 $real_orig_url = $source[0]; // url
-                $scope_url = $source[1];   // scope (local, remote)
+                $scope_url = $source[1]; // scope (local, remote)
                 $type_url = $source[2]; // type (rel, abs, url)
 
                 // Get path and query from origin url
@@ -2533,7 +2533,7 @@ 
                 $dest_url_query = '';
 
                 if (!empty($real_orig_query)) {
-                    $dest_url_query = '?' . $real_orig_query;
+                    $dest_url_query = '?'.$real_orig_query;
                     if (strpos($dest_url_query, $origin_course_code) !== false) {
                         $dest_url_query = str_replace($origin_course_code, $destination_course_code, $dest_url_query);
                     }
@@ -2614,7 +2614,7 @@ 
 
                                 //$destination_url = $url_course_path . $destination_course_directory . '/' . $document_file . $dest_url_query;
                                 // See BT#7780
-                                $destination_url = $dest_course_path_rel . $document_file . $dest_url_query;
+                                $destination_url = $dest_course_path_rel.$document_file.$dest_url_query;
 
                                 // If the course code doesn't exist in the path? what we do? Nothing! see BT#1985
                                 if (strpos($real_orig_path, $origin_course_code) === false) {
@@ -2649,14 +2649,14 @@ 
     function replace_urls_inside_content_html_when_moving_file($file_name, $original_path, $destiny_path)
     {
         if (substr($original_path, strlen($original_path) - 1, strlen($original_path)) == '/') {
-            $original = $original_path . $file_name;
+            $original = $original_path.$file_name;
         } else {
-            $original = $original_path . '/' . $file_name;
+            $original = $original_path.'/'.$file_name;
         }
         if (substr($destiny_path, strlen($destiny_path) - 1, strlen($destiny_path)) == '/') {
-            $destination = $destiny_path . $file_name;
+            $destination = $destiny_path.$file_name;
         } else {
-            $destination = $destiny_path . '/' . $file_name;
+            $destination = $destiny_path.'/'.$file_name;
         }
         $original_count = count(explode('/', $original));
         $destination_count = count(explode('/', $destination));
@@ -2670,8 +2670,8 @@ 
             $mode = 'inside';
         }
         //We do not select the $original_path becayse the file was already moved
-        $content_html = file_get_contents($destiny_path . '/' . $file_name);
-        $destination_file = $destiny_path . '/' . $file_name;
+        $content_html = file_get_contents($destiny_path.'/'.$file_name);
+        $destination_file = $destiny_path.'/'.$file_name;
 
         $pre_original = strstr($original_path, 'document');
         $pre_destin = strstr($destiny_path, 'document');
@@ -2693,11 +2693,11 @@ 
         }
 
         if ($pre_original != '') {
-            $pre_original = '..' . $pre_original . '/';
+            $pre_original = '..'.$pre_original.'/';
         }
 
         if ($pre_destin != '') {
-            $pre_destin = '..' . $pre_destin . '/';
+            $pre_destin = '..'.$pre_destin.'/';
         }
 
         $levels = explode('/', $pre_original);
@@ -2715,7 +2715,7 @@ 
         //echo '$count_pre_destination_levels '. $count_pre_destination_levels;
         $pre_remove = '';
         for ($i = 1; $i <= $count_pre_destination_levels; $i++) {
-            $pre_remove .='..\/';
+            $pre_remove .= '..\/';
         }
 
         $orig_source_html = DocumentManager::get_resources_from_source_html($content_html);
@@ -2723,9 +2723,9 @@ 
         foreach ($orig_source_html as $source) {
 
             // get information about source url
-            $real_orig_url = $source[0];   // url
-            $scope_url = $source[1];   // scope (local, remote)
-            $type_url = $source[2];   // tyle (rel, abs, url)
+            $real_orig_url = $source[0]; // url
+            $scope_url = $source[1]; // scope (local, remote)
+            $type_url = $source[2]; // tyle (rel, abs, url)
             // Get path and query from origin url
             $orig_parse_url = parse_url($real_orig_url);
             $real_orig_path = $orig_parse_url['path'];
@@ -2752,11 +2752,11 @@ 
                         $real_orig_url_temp = '';
                         if ($mode == 'inside') {
                             $real_orig_url_temp = str_replace('../', '', $real_orig_url);
-                            $destination_url = $link_to_add . $real_orig_url_temp;
+                            $destination_url = $link_to_add.$real_orig_url_temp;
                         } else {
                             $real_orig_url_temp = $real_orig_url;
 
-                            $destination_url = preg_replace("/" . $pre_remove . "/", '', $real_orig_url, 1);
+                            $destination_url = preg_replace("/".$pre_remove."/", '', $real_orig_url, 1);
                         }
                         if ($real_orig_url == $destination_url) {
                             //echo 'continue2';
@@ -2782,7 +2782,7 @@ 
     {
         $course_data = api_get_course_info($course_code);
         $document_data = self::get_document_data_by_id($document_id, $course_code);
-        $file_path = api_get_path(SYS_COURSE_PATH) . $course_data['path'] . '/document' . $document_data['path'];
+        $file_path = api_get_path(SYS_COURSE_PATH).$course_data['path'].'/document'.$document_data['path'];
         $pdf = new PDF('A4-L', 'L');
         $pdf->html_to_pdf($file_path, $document_data['title'], $course_code);
     }
@@ -2813,9 +2813,9 @@ 
     ) {
         $course_info = api_get_course_info();
         $sessionId = api_get_session_id();
-        $course_dir = $course_info['path'] . '/document';
+        $course_dir = $course_info['path'].'/document';
         $sys_course_path = api_get_path(SYS_COURSE_PATH);
-        $base_work_dir = $sys_course_path . $course_dir;
+        $base_work_dir = $sys_course_path.$course_dir;
 
         if (isset($files[$fileKey])) {
             $upload_ok = process_uploaded_file($files[$fileKey], $show_output);
@@ -2892,7 +2892,7 @@ 
                     // Showing message when sending zip files
                     if ($new_path === true && $unzip == 1 && $show_output) {
                         Display::display_confirmation_message(
-                            get_lang('UplUploadSucceeded') . '<br />',
+                            get_lang('UplUploadSucceeded').'<br />',
                             false
                         );
                     }
@@ -2994,7 +2994,7 @@ 
         }
         if (isset($output)) {
             foreach ($output as & $line) {
-                $content .= $line . "\n";
+                $content .= $line."\n";
             }
             return $content;
         } else {
@@ -3026,13 +3026,13 @@ 
         $group_condition = null;
         if (isset($group_id)) {
             $group_id = intval($group_id);
-            $group_condition = " AND props.to_group_id='" . $group_id . "' ";
+            $group_condition = " AND props.to_group_id='".$group_id."' ";
         }
 
         $session_condition = null;
         if (isset($session_id)) {
             $session_id = intval($session_id);
-            $session_condition = " AND props.session_id='" . $session_id . "' ";
+            $session_condition = " AND props.session_id='".$session_id."' ";
         }
 
         $sql = "SELECT SUM(size)
@@ -3042,7 +3042,7 @@ 
                 WHERE
                     props.c_id 	= $course_id AND
                     docs.c_id 	= $course_id AND
-                    props.tool 	= '" . TOOL_DOCUMENT . "' AND
+                    props.tool 	= '".TOOL_DOCUMENT."' AND
                     props.visibility <> 2
                     $group_condition
                     $session_condition
@@ -3065,8 +3065,8 @@ 
         $course_quota_m = round($course_quota / 1048576);
         $already_consumed_space_m = round($already_consumed_space / 1048576);
 
-        $message = get_lang('MaximumAllowedQuota') . ' <strong>' . $course_quota_m . ' megabyte</strong>.<br />';
-        $message .= get_lang('CourseCurrentlyUses') . ' <strong>' . $already_consumed_space_m . ' megabyte</strong>.<br />';
+        $message = get_lang('MaximumAllowedQuota').' <strong>'.$course_quota_m.' megabyte</strong>.<br />';
+        $message .= get_lang('CourseCurrentlyUses').' <strong>'.$already_consumed_space_m.' megabyte</strong>.<br />';
 
         $percentage = round(($already_consumed_space / $course_quota * 100), 1);
 
@@ -3074,33 +3074,33 @@ 
 
         // Decide where to place percentage in graph
         if ($percentage >= 50) {
-            $text_in_filled = '&nbsp;' . $other_percentage . '%';
+            $text_in_filled = '&nbsp;'.$other_percentage.'%';
             $text_in_unfilled = '';
         } else {
-            $text_in_unfilled = '&nbsp;' . $other_percentage . '%';
+            $text_in_unfilled = '&nbsp;'.$other_percentage.'%';
             $text_in_filled = '';
         }
 
         // Decide the background colour of the graph
         if ($percentage < 65) {
-            $colour = '#00BB00';        // Safe - green
+            $colour = '#00BB00'; // Safe - green
         } elseif ($percentage < 90) {
-            $colour = '#ffd400';        // Filling up - yelloworange
+            $colour = '#ffd400'; // Filling up - yelloworange
         } else {
-            $colour = '#DD0000';        // Full - red
+            $colour = '#DD0000'; // Full - red
         }
 
         // This is used for the table width: a table of only 100 pixels looks too small
         $visual_percentage = 4 * $percentage;
         $visual_other_percentage = 4 * $other_percentage;
 
-        $message .= get_lang('PercentageQuotaInUse') . ': <strong>' . $percentage . '%</strong>.<br />' .
-            get_lang('PercentageQuotaFree') . ': <strong>' . $other_percentage . '%</strong>.<br />';
+        $message .= get_lang('PercentageQuotaInUse').': <strong>'.$percentage.'%</strong>.<br />'.
+            get_lang('PercentageQuotaFree').': <strong>'.$other_percentage.'%</strong>.<br />';
 
-        $show_percentage = '&nbsp;' . $percentage . '%';
-        $message .= '<div style="width: 80%; text-align: center; -moz-border-radius: 5px 5px 5px 5px; border: 1px solid #aaa; background-image: url(\'' . api_get_path(WEB_CODE_PATH) . 'css/' . api_get_visual_theme() . '/images/bg-header4.png\');" class="document-quota-bar">' .
-            '<div style="width:' . $percentage . '%; background-color: #bbb; border-right:3px groove #bbb; -moz-border-radius:5px;">&nbsp;</div>' .
-            '<span style="margin-top: -15px; margin-left:-15px; position: absolute;font-weight:bold;">' . $show_percentage . '</span></div>';
+        $show_percentage = '&nbsp;'.$percentage.'%';
+        $message .= '<div style="width: 80%; text-align: center; -moz-border-radius: 5px 5px 5px 5px; border: 1px solid #aaa; background-image: url(\''.api_get_path(WEB_CODE_PATH).'css/'.api_get_visual_theme().'/images/bg-header4.png\');" class="document-quota-bar">'.
+            '<div style="width:'.$percentage.'%; background-color: #bbb; border-right:3px groove #bbb; -moz-border-radius:5px;">&nbsp;</div>'.
+            '<span style="margin-top: -15px; margin-left:-15px; position: absolute;font-weight:bold;">'.$show_percentage.'</span></div>';
         echo $message;
     }
 
@@ -3116,7 +3116,7 @@ 
         $percentage = $already_consumed_space / $course_quota * 100;
         $percentage = round($percentage, 1);
         $message = get_lang('YouAreCurrentlyUsingXOfYourX');
-        $message = sprintf($message, $already_consumed_space_m, $percentage . '%', $course_quota_m . ' ');
+        $message = sprintf($message, $already_consumed_space_m, $percentage.'%', $course_quota_m.' ');
         echo Display::div($message, array('id' => 'document_quota'));
     }
 
@@ -3147,13 +3147,13 @@ 
      */
     static function generate_jplayer_jquery($params = array())
     {
-        $js_path = api_get_path(WEB_LIBRARY_PATH) . 'javascript/';
+        $js_path = api_get_path(WEB_LIBRARY_PATH).'javascript/';
 
         $js = '
-            $("#jquery_jplayer_' . $params['count'] . '").jPlayer({
+            $("#jquery_jplayer_' . $params['count'].'").jPlayer({
                 ready: function() {
                     $(this).jPlayer("setMedia", {
-                        ' . $params['extension'] . ' : "' . $params['url'] . '"
+                        ' . $params['extension'].' : "'.$params['url'].'"
                     });
                 },
                 play: function() { // To avoid both jPlayers playing together.
@@ -3161,12 +3161,12 @@ 
                 },
                 //errorAlerts: true,
                 //warningAlerts: true,
-                swfPath: "' . $js_path . 'jquery-jplayer/jplayer/",
+                swfPath: "' . $js_path.'jquery-jplayer/jplayer/",
                 //supplied: "m4a, oga, mp3, ogg, wav",
-                supplied: "' . $params['extension'] . '",
+                supplied: "' . $params['extension'].'",
                 wmode: "window",
                 solution: "flash, html",  // Do not change this setting
-                cssSelectorAncestor: "#jp_container_' . $params['count'] . '",
+                cssSelectorAncestor: "#jp_container_' . $params['count'].'",
             });  	 ' . "\n\n";
 
         return $js;
@@ -3196,16 +3196,16 @@ 
         }
 
         //Shows only the play button
-        $html = '<div id="jquery_jplayer_' . $i . '" class="jp-jplayer"></div>
-                <div id="jp_container_' . $i . '" class="jp-audio">
+        $html = '<div id="jquery_jplayer_'.$i.'" class="jp-jplayer"></div>
+                <div id="jp_container_' . $i.'" class="jp-audio">
                     <div class="jp-type-single">
                         <div class="jp-gui jp-interface">
                             <ul class="jp-controls">
                                 <li><a href="javascript:;" class="jp-play" tabindex="1">play</a></li>
                                 <li><a href="javascript:;" class="jp-pause" tabindex="1">pause</a></li>
-                                ' . $extra_controls . '
+                                ' . $extra_controls.'
                             </ul>
-                            ' . $progress . '
+                            ' . $progress.'
                         </div>
                     </div>
                 </div>';
@@ -3258,8 +3258,8 @@ 
                     </div>
                 </div>
                 <div class="jp-no-solution">
-                    <span>' . get_lang('UpdateRequire') . '</span>
-                    ' . get_lang("ToPlayTheMediaYouWillNeedToUpdateYourBrowserToARecentVersionYouCanAlsoDownloadTheFile") . '
+                    <span>' . get_lang('UpdateRequire').'</span>
+                    ' . get_lang("ToPlayTheMediaYouWillNeedToUpdateYourBrowserToARecentVersionYouCanAlsoDownloadTheFile").'
                 </div>
             </div>
         </div>';
@@ -3340,7 +3340,7 @@ 
 
         $add_folder_filter = null;
         if (!empty($filter_by_folder)) {
-            $add_folder_filter = " AND docs.path LIKE '" . Database::escape_string($filter_by_folder) . "%'";
+            $add_folder_filter = " AND docs.path LIKE '".Database::escape_string($filter_by_folder)."%'";
         }
 
         // If we are in LP display hidden folder https://support.chamilo.org/issues/6679
@@ -3375,7 +3375,7 @@ 
 
                 $notLikeCondition = null;
                 for ($i = 1; $i <= $num; $i++) {
-                    $repeat = str_repeat('/%', $i+1);
+                    $repeat = str_repeat('/%', $i + 1);
                     $notLikeCondition .= " AND docs.path NOT LIKE '".Database::escape_string($cleanedPath.$repeat)."' ";
                 }
 
@@ -3400,7 +3400,7 @@ 
                 ON (docs.id = last.ref AND docs.c_id = last.c_id)
                 WHERE
                     docs.path NOT LIKE '%_DELETED_%' AND
-                    last.tool = '" . TOOL_DOCUMENT . "' $condition_session AND
+                    last.tool = '".TOOL_DOCUMENT."' $condition_session AND
                     (last.visibility = '1' $lp_visibility_condition) AND
                     last.visibility <> 2 AND
                     docs.c_id = {$course_info['real_id']} AND
@@ -3430,7 +3430,7 @@ 
                 Display::url(
                     Display::return_icon('close.png', get_lang('Close'), array(), ICON_SIZE_SMALL),
                     ' javascript:void(0);',
-                    array('id' => 'close_div_' . $course_info['real_id'] . '_' . $session_id, 'class' => 'close_div')
+                    array('id' => 'close_div_'.$course_info['real_id'].'_'.$session_id, 'class' => 'close_div')
                 ),
                 array('style' => 'position:absolute;right:10px')
             );
@@ -3534,7 +3534,7 @@ 
                     $('#'+tempId).hide();
                 } else {
                     image.addClass('open');
-                    image.attr('src', '" . Display::returnIconPath('nolines_minus.gif') . "');
+                    image.attr('src', '" . Display::returnIconPath('nolines_minus.gif')."');
                     $('#'+id).hide();
                     $('#'+tempId).show();
 
@@ -3581,7 +3581,7 @@ 
         $target,
         $overwrite_url
     ) {
-        $img_sys_path = api_get_path(SYS_CODE_PATH) . 'img/';
+        $img_sys_path = api_get_path(SYS_CODE_PATH).'img/';
         $web_code_path = api_get_path(WEB_CODE_PATH);
 
         $documentId = $resource['id'];
@@ -3596,7 +3596,7 @@ 
         // It's a file.
         $icon = choose_image($path);
         $position = strrpos($icon, '.');
-        $icon = substr($icon, 0, $position) . '_small.gif';
+        $icon = substr($icon, 0, $position).'_small.gif';
         $my_file_title = $resource['title'];
         $visibility = $resource['visibility'];
 
@@ -3608,25 +3608,25 @@ 
         // Show the "image name" not the filename of the image.
         if ($lp_id) {
             // LP URL
-            $url = api_get_path(WEB_CODE_PATH).'newscorm/lp_controller.php?'.api_get_cidreq().'&amp;action=add_item&amp;type=' . TOOL_DOCUMENT . '&amp;file=' . $documentId . '&amp;lp_id=' . $lp_id;
+            $url = api_get_path(WEB_CODE_PATH).'newscorm/lp_controller.php?'.api_get_cidreq().'&amp;action=add_item&amp;type='.TOOL_DOCUMENT.'&amp;file='.$documentId.'&amp;lp_id='.$lp_id;
             if (!empty($overwrite_url)) {
-                $url = $overwrite_url . '&cidReq=' . $course_info['code'] . '&id_session=' . $session_id . '&document_id=' . $documentId.'';
+                $url = $overwrite_url.'&cidReq='.$course_info['code'].'&id_session='.$session_id.'&document_id='.$documentId.'';
             }
         } else {
             // Direct document URL
-            $url = $web_code_path . 'document/document.php?cidReq=' . $course_info['code'] . '&id_session=' . $session_id . '&id=' . $documentId;
+            $url = $web_code_path.'document/document.php?cidReq='.$course_info['code'].'&id_session='.$session_id.'&id='.$documentId;
             if (!empty($overwrite_url)) {
-                $url = $overwrite_url . '&cidReq=' . $course_info['code'] . '&id_session=' . $session_id . '&document_id=' . $documentId;
+                $url = $overwrite_url.'&cidReq='.$course_info['code'].'&id_session='.$session_id.'&document_id='.$documentId;
             }
         }
 
         $img = Display::returnIconPath($icon);
-        if (!file_exists($img_sys_path . $icon)) {
+        if (!file_exists($img_sys_path.$icon)) {
             $img = Display::returnIconPath('default_small.gif');
         }
 
         $link = Display::url(
-            '<img alt="" src="' . $img . '" title="" />&nbsp;' . $my_file_title, $url,
+            '<img alt="" src="'.$img.'" title="" />&nbsp;'.$my_file_title, $url,
             array('target' => $target)
         );
 
@@ -3637,12 +3637,12 @@ 
         $return = null;
 
         if ($lp_id == false) {
-            $return .= '<li class="doc_resource '.$visibilityClass.' " data_id="' . $documentId . '" data_type="document" title="' . $my_file_title . '" >';
+            $return .= '<li class="doc_resource '.$visibilityClass.' " data_id="'.$documentId.'" data_type="document" title="'.$my_file_title.'" >';
         } else {
-            $return .= '<li class="doc_resource lp_resource_element '.$visibilityClass.' " data_id="' . $documentId . '" data_type="document" title="' . $my_file_title . '" >';
+            $return .= '<li class="doc_resource lp_resource_element '.$visibilityClass.' " data_id="'.$documentId.'" data_type="document" title="'.$my_file_title.'" >';
         }
 
-        $return .= '<div class="item_data" style="margin-left:' . ($num  * 18) . 'px;margin-right:5px;">';
+        $return .= '<div class="item_data" style="margin-left:'.($num * 18).'px;margin-right:5px;">';
 
         if ($add_move_button) {
             $return .= '<a class="moved" href="#">';
@@ -3707,7 +3707,7 @@ 
             if (isset($resource['visible']) && $resource['visible'] == 0) {
                 $folder_class_hidden = "doc_folder_hidden"; // in base.css
             }
-            $onclick = 'onclick="javascript: testResources(\'res_' . $resource['id'] . '\',\'img_' . $resource['id'] . '\')"';
+            $onclick = 'onclick="javascript: testResources(\'res_'.$resource['id'].'\',\'img_'.$resource['id'].'\')"';
         }
         $return = null;
 
@@ -3715,22 +3715,22 @@ 
             $return = '<ul class="lp_resource">';
         }
 
-        $return .= '<li class="doc_folder '.$folder_class_hidden.'" id="doc_id_' . $resource['id'] . '"  style="margin-left:' . ($num * 18) . 'px; ">';
+        $return .= '<li class="doc_folder '.$folder_class_hidden.'" id="doc_id_'.$resource['id'].'"  style="margin-left:'.($num * 18).'px; ">';
 
         $image = Display::returnIconPath('nolines_plus.gif');
         if (empty($path)) {
             $image = Display::returnIconPath('nolines_minus.gif');
         }
-        $return .= '<img style="cursor: pointer;" src="'.$image.'" align="absmiddle" id="img_'.$resource['id'] . '" '.$onclick.'>';
+        $return .= '<img style="cursor: pointer;" src="'.$image.'" align="absmiddle" id="img_'.$resource['id'].'" '.$onclick.'>';
         $return .= Display::return_icon('lp_folder.gif').'&nbsp;';
         $return .= '<span '.$onclick.' style="cursor: pointer;" >'.$title.'</span>';
         $return .= '</li>';
 
         if (empty($path)) {
             if ($folderId == false) {
-                $return .= '<div id="res_' . $resource['id'] . '" >';
+                $return .= '<div id="res_'.$resource['id'].'" >';
             } else {
-                $return .= '<div id="res_' . $resource['id'] . '" style="display: none;" >';
+                $return .= '<div id="res_'.$resource['id'].'" style="display: none;" >';
             }
         }
 
@@ -3892,9 +3892,9 @@ 
             $session_id = api_get_session_id();
         }
         $course_info = api_get_course_info($course_code);
-        $course_dir = $course_info['path'] . '/document';
+        $course_dir = $course_info['path'].'/document';
         $sys_course_path = api_get_path(SYS_COURSE_PATH);
-        $base_work_dir = $sys_course_path . $course_dir;
+        $base_work_dir = $sys_course_path.$course_dir;
 
         $course_id = $course_info['real_id'];
         $table_document = Database::get_course_table(TABLE_DOCUMENT);
@@ -3903,7 +3903,7 @@ 
         $result = Database::query($qry);
         if (Database::num_rows($result) == 1) {
             $row = Database::fetch_array($result);
-            $doc_path = api_get_path(SYS_COURSE_PATH) . $course_dir . $row['path'];
+            $doc_path = api_get_path(SYS_COURSE_PATH).$course_dir.$row['path'];
             //TODO: mime_content_type is deprecated, fileinfo php extension is enabled by default as of PHP 5.3.0
             // now versions of PHP on Debian testing(5.2.6-5) and Ubuntu(5.2.6-2ubuntu) are lower, so wait for a while
             $doc_mime = mime_content_type($doc_path);
@@ -3934,8 +3934,8 @@ 
                 $file_content = self::get_text_content($doc_path, $doc_mime);
                 $course_code = Database::escape_string($course_code);
 
-                require_once api_get_path(LIBRARY_PATH) . 'search/ChamiloIndexer.class.php';
-                require_once api_get_path(LIBRARY_PATH) . 'search/IndexableChunk.class.php';
+                require_once api_get_path(LIBRARY_PATH).'search/ChamiloIndexer.class.php';
+                require_once api_get_path(LIBRARY_PATH).'search/IndexableChunk.class.php';
 
                 $ic_slide = new IndexableChunk();
                 $ic_slide->addValue('title', $file_title);
@@ -3952,7 +3952,7 @@ 
                 $di = new ChamiloIndexer();
                 $return = $di->connectDb(null, null, $lang);
 
-                require_once api_get_path(LIBRARY_PATH) . 'specific_fields_manager.lib.php';
+                require_once api_get_path(LIBRARY_PATH).'specific_fields_manager.lib.php';
                 $specific_fields = get_specific_field_list();
 
                 // process different depending on what to do if file exists
@@ -3989,7 +3989,7 @@ 
                             } else { //if the specific field is not defined, force an empty one
                                 $sterms = '';
                             }
-                            $all_specific_terms .= ' ' . $sterms;
+                            $all_specific_terms .= ' '.$sterms;
                             $sterms = explode(',', $sterms);
                             foreach ($sterms as $sterm) {
                                 $sterm = trim($sterm);
@@ -4003,7 +4003,7 @@ 
                             }
                         }
                         // Add terms also to content to make terms findable by probabilistic search
-                        $file_content = $all_specific_terms . ' ' . $file_content;
+                        $file_content = $all_specific_terms.' '.$file_content;
 
                         if (!$simulation) {
                             $ic_slide->addValue('content', $file_content);
@@ -4029,7 +4029,7 @@ 
                         } else { //if the specific field is not defined, force an empty one
                             $sterms = '';
                         }
-                        $all_specific_terms .= ' ' . $sterms;
+                        $all_specific_terms .= ' '.$sterms;
                         if (!empty($sterms)) {
                             $sterms = explode(',', $sterms);
                             foreach ($sterms as $sterm) {
@@ -4041,7 +4041,7 @@ 
                         }
                     }
                     // Add terms also to content to make terms findable by probabilistic search
-                    $file_content = $all_specific_terms . ' ' . $file_content;
+                    $file_content = $all_specific_terms.' '.$file_content;
                     if (!$simulation) {
                         $ic_slide->addValue('content', $file_content);
                         $di->addChunk($ic_slide);
@@ -4325,7 +4325,7 @@ 
         $defaultVisibility = 'visible';
 
         if (isset($settings['documents'])) {
-            $portalDefaultVisibility =  'invisible';
+            $portalDefaultVisibility = 'invisible';
             if ($settings['documents'] == 'true') {
                 $portalDefaultVisibility = 'visible';
             }
@@ -4563,7 +4563,7 @@ 
         //make htaccess with allow from all, and file index.html into temp/audio
         $htaccess = api_get_path(SYS_ARCHIVE_PATH).'temp/audio/.htaccess';
         if (!file_exists($htaccess)) {
-            $htaccess_content="order deny,allow\r\nallow from all\r\nOptions -Indexes";
+            $htaccess_content = "order deny,allow\r\nallow from all\r\nOptions -Indexes";
             $fp = @ fopen(api_get_path(SYS_ARCHIVE_PATH).'temp/audio/.htaccess', 'w');
             if ($fp) {
                 fwrite($fp, $htaccess_content);
@@ -4572,9 +4572,9 @@ 
         }
 
         //encript temp name file
-        $name_crip = sha1(uniqid());//encript
-        $findext= explode(".", $file);
-        $extension = $findext[count($findext)-1];
+        $name_crip = sha1(uniqid()); //encript
+        $findext = explode(".", $file);
+        $extension = $findext[count($findext) - 1];
         $file_crip = $name_crip.'.'.$extension;
 
         //copy file to temp/audio directory
@@ -4678,7 +4678,7 @@ 
         $comment = null;
 
         $fileName = api_replace_dangerous_char($title);
-        $filePath = api_get_path(SYS_COURSE_PATH) . "{$courseData['path']}/document{$dir}";
+        $filePath = api_get_path(SYS_COURSE_PATH)."{$courseData['path']}/document{$dir}";
         $fileFullPath = "{$filePath}/{$fileName}.html";
         $fileSize = 0;
         $fileType = 'file';
@@ -4730,7 +4730,7 @@ 
             $fileSize,
             $title,
             $comment,
-            0,//$readonly = 0,
+            0, //$readonly = 0,
             true, //$save_visibility = true,
             null, //$group_id = null,
             $sessionId
@@ -5015,8 +5015,8 @@ 
             $sessionId,
             $groupId
         )) {
-            $uniqueName = self::addSuffixToFileName($name, '_' . $counter);
-            $filePath = $path . $uniqueName;
+            $uniqueName = self::addSuffixToFileName($name, '_'.$counter);
+            $filePath = $path.$uniqueName;
             $counter++;
         }
 
@@ -5049,7 +5049,7 @@ 
             $folder_sql = implode("','", $escaped_folders);
 
             $sql = "SELECT * FROM $doc_table
-                WHERE filetype = 'folder' AND c_id = $course_id AND path IN ('" . $folder_sql . "')";
+                WHERE filetype = 'folder' AND c_id = $course_id AND path IN ('".$folder_sql."')";
             $res = Database::query($sql);
             $folder_titles = array();
             while ($obj = Database::fetch_object($res)) {
@@ -5057,7 +5057,7 @@ 
             }
         }
 
-        $form = new FormValidator('selector', 'GET', api_get_self() . '?' . api_get_cidreq());
+        $form = new FormValidator('selector', 'GET', api_get_self().'?'.api_get_cidreq());
         $form->addElement('hidden', 'cidReq', api_get_course_id());
         $parent_select = $form->addSelect('id', get_lang('CurrentDirectory'), '', array('onchange' => 'javascript: document.selector.submit();'));
 
@@ -5077,9 +5077,9 @@ 
                     $folder_titles[$folder] = cut($folder_titles[$folder], 80);
                     $counter = count($path_parts) - 2;
                     if ($counter > 0) {
-                        $label = str_repeat('&nbsp;&nbsp;&nbsp;', $counter) . ' &mdash; ' . $folder_titles[$folder];
+                        $label = str_repeat('&nbsp;&nbsp;&nbsp;', $counter).' &mdash; '.$folder_titles[$folder];
                     } else {
-                        $label = ' &mdash; ' . $folder_titles[$folder];
+                        $label = ' &mdash; '.$folder_titles[$folder];
                     }
                     $parent_select->addOption($label, $folder_id);
                     if ($selected != '') {
@@ -5097,7 +5097,7 @@ 
                     } else {
                         $path_parts = explode('/', str_replace($group_dir, '', $folder));
                         $label = cut($label, 80);
-                        $label = str_repeat('&nbsp;&nbsp;&nbsp;', count($path_parts) - 2) . ' &mdash; ' . $label;
+                        $label = str_repeat('&nbsp;&nbsp;&nbsp;', count($path_parts) - 2).' &mdash; '.$label;
                     }
                     $parent_select->addOption($label, $folder_id);
                     if ($selected != '') {
@@ -5129,7 +5129,7 @@ 
     ) {
         global $dbl_click_id;
         $course_info = api_get_course_info();
-        $www = api_get_path(WEB_COURSE_PATH) . $course_info['path'] . '/document';
+        $www = api_get_path(WEB_COURSE_PATH).$course_info['path'].'/document';
         $webOdflist = DocumentManager::get_web_odf_extension_list();
 
         // Get the title or the basename depending on what we're using
@@ -5153,11 +5153,11 @@ 
 
         if (!$show_as_icon) {
             // Build download link (icon)
-            $forcedownload_link = ($filetype == 'folder') ? api_get_self() . '?' . api_get_cidreq() . '&action=downloadfolder&id=' . $document_data['id'] : api_get_self() . '?' . api_get_cidreq() . '&amp;action=download&amp;id=' . $document_data['id'];
+            $forcedownload_link = ($filetype == 'folder') ? api_get_self().'?'.api_get_cidreq().'&action=downloadfolder&id='.$document_data['id'] : api_get_self().'?'.api_get_cidreq().'&amp;action=download&amp;id='.$document_data['id'];
             // Folder download or file download?
             $forcedownload_icon = ($filetype == 'folder') ? 'save_pack.png' : 'save.png';
             // Prevent multiple clicks on zipped folder download
-            $prevent_multiple_click = ($filetype == 'folder') ? " onclick=\"javascript: if(typeof clic_$dbl_click_id == 'undefined' || !clic_$dbl_click_id) { clic_$dbl_click_id=true; window.setTimeout('clic_" . ($dbl_click_id++) . "=false;',10000); } else { return false; }\"" : '';
+            $prevent_multiple_click = ($filetype == 'folder') ? " onclick=\"javascript: if(typeof clic_$dbl_click_id == 'undefined' || !clic_$dbl_click_id) { clic_$dbl_click_id=true; window.setTimeout('clic_".($dbl_click_id++)."=false;',10000); } else { return false; }\"" : '';
         }
 
         $target = '_self';
@@ -5173,20 +5173,20 @@ 
 
             if ($is_browser_viewable_file) {
                 if ($ext == 'pdf' || in_array($ext, $webOdflist)) {
-                    $url = api_get_self() . '?' . api_get_cidreq() . '&amp;action=download&amp;id=' . $document_data['id'];
+                    $url = api_get_self().'?'.api_get_cidreq().'&amp;action=download&amp;id='.$document_data['id'];
                 } else {
-                    $url = 'showinframes.php?' . api_get_cidreq() . '&id=' . $document_data['id'];
+                    $url = 'showinframes.php?'.api_get_cidreq().'&id='.$document_data['id'];
                 }
             } else {
                 // url-encode for problematic characters (we may not call them dangerous characters...)
-                $path = str_replace('%2F', '/', $url_path) . '?' . api_get_cidreq();
-                $url = $www . $path;
+                $path = str_replace('%2F', '/', $url_path).'?'.api_get_cidreq();
+                $url = $www.$path;
             }
 
             /*$path = str_replace('%2F', '/', $url_path); //yox view hack otherwise the image can't be well read
             $url = $www . $path;*/
         } else {
-            $url = api_get_self() . '?' . api_get_cidreq() . '&id=' . $document_data['id'];
+            $url = api_get_self().'?'.api_get_cidreq().'&id='.$document_data['id'];
         }
 
         // The little download icon
@@ -5196,10 +5196,10 @@ 
         if ($path == '/shared_folder') {
             $tooltip_title_alt = get_lang('UserFolders');
         } elseif (strstr($path, 'shared_folder_session_')) {
-            $tooltip_title_alt = get_lang('UserFolders') . ' (' . api_get_session_name(api_get_session_id()) . ')';
+            $tooltip_title_alt = get_lang('UserFolders').' ('.api_get_session_name(api_get_session_id()).')';
         } elseif (strstr($tooltip_title, 'sf_user_')) {
             $userinfo = api_get_user_info(substr($tooltip_title, 8));
-            $tooltip_title_alt = get_lang('UserFolder') . ' ' . $userinfo['complete_name'];
+            $tooltip_title_alt = get_lang('UserFolder').' '.$userinfo['complete_name'];
         } elseif ($path == '/chat_files') {
             $tooltip_title_alt = get_lang('ChatFiles');
         } elseif ($path == '/learning_path') {
@@ -5232,24 +5232,24 @@ 
                 ) {
                     //filter when I am into shared folder, I can show for donwload only my shared folder
                     if (DocumentManager::is_shared_folder($curdirpath, $current_session_id)) {
-                        if (preg_match('/shared_folder\/sf_user_' . api_get_user_id() . '$/', urldecode($forcedownload_link)) ||
-                            preg_match('/shared_folder_session_' . $current_session_id . '\/sf_user_' . api_get_user_id() . '$/', urldecode($forcedownload_link)) ||
+                        if (preg_match('/shared_folder\/sf_user_'.api_get_user_id().'$/', urldecode($forcedownload_link)) ||
+                            preg_match('/shared_folder_session_'.$current_session_id.'\/sf_user_'.api_get_user_id().'$/', urldecode($forcedownload_link)) ||
                             api_is_allowed_to_edit() || api_is_platform_admin()
                         ) {
-                            $force_download_html = ($size == 0) ? '' : '<a href="' . $forcedownload_link . '" style="float:right"' . $prevent_multiple_click . '>' .
-                                Display::return_icon($forcedownload_icon, get_lang('Download'), array(), ICON_SIZE_SMALL) . '</a>';
+                            $force_download_html = ($size == 0) ? '' : '<a href="'.$forcedownload_link.'" style="float:right"'.$prevent_multiple_click.'>'.
+                                Display::return_icon($forcedownload_icon, get_lang('Download'), array(), ICON_SIZE_SMALL).'</a>';
                         }
                     } elseif (!preg_match('/shared_folder/', urldecode($forcedownload_link)) ||
                         api_is_allowed_to_edit() ||
                         api_is_platform_admin()
                     ) {
-                        $force_download_html = ($size == 0) ? '' : '<a href="' . $forcedownload_link . '" style="float:right"' . $prevent_multiple_click . '>' .
-                            Display::return_icon($forcedownload_icon, get_lang('Download'), array(), ICON_SIZE_SMALL) . '</a>';
+                        $force_download_html = ($size == 0) ? '' : '<a href="'.$forcedownload_link.'" style="float:right"'.$prevent_multiple_click.'>'.
+                            Display::return_icon($forcedownload_icon, get_lang('Download'), array(), ICON_SIZE_SMALL).'</a>';
                     }
                 }
             } else {
-                $force_download_html = ($size == 0) ? '' : '<a href="' . $forcedownload_link . '" style="float:right"' . $prevent_multiple_click . '>' .
-                    Display::return_icon($forcedownload_icon, get_lang('Download'), array(), ICON_SIZE_SMALL) . '</a>';
+                $force_download_html = ($size == 0) ? '' : '<a href="'.$forcedownload_link.'" style="float:right"'.$prevent_multiple_click.'>'.
+                    Display::return_icon($forcedownload_icon, get_lang('Download'), array(), ICON_SIZE_SMALL).'</a>';
             }
 
             // Copy files to users myfiles
@@ -5257,12 +5257,12 @@ 
                 api_get_setting('users_copy_files') == 'true' &&
                 !api_is_anonymous()
             ) {
-                $copy_myfiles_link = ($filetype == 'file') ? api_get_self() . '?' . api_get_cidreq() . '&action=copytomyfiles&id=' . $document_data['id'] : api_get_self() . '?' . api_get_cidreq();
+                $copy_myfiles_link = ($filetype == 'file') ? api_get_self().'?'.api_get_cidreq().'&action=copytomyfiles&id='.$document_data['id'] : api_get_self().'?'.api_get_cidreq();
 
                 if ($filetype == 'file') {
 
-                    $copy_to_myfiles = '<a href="' . $copy_myfiles_link . '" style="float:right"' . $prevent_multiple_click . '>' .
-                        Display::return_icon('briefcase.png', get_lang('CopyToMyFiles'), array(), ICON_SIZE_SMALL) . '&nbsp;&nbsp;</a>';
+                    $copy_to_myfiles = '<a href="'.$copy_myfiles_link.'" style="float:right"'.$prevent_multiple_click.'>'.
+                        Display::return_icon('briefcase.png', get_lang('CopyToMyFiles'), array(), ICON_SIZE_SMALL).'&nbsp;&nbsp;</a>';
 
                     if (api_get_setting('allow_my_files') === 'false') {
                         $copy_to_myfiles = '';
@@ -5281,13 +5281,13 @@ 
                 $filetype == 'file' &&
                 in_array($extension, array('html', 'htm'))
             ) {
-                $pdf_icon = ' <a style="float:right".' . $prevent_multiple_click . ' href="' . api_get_self() . '?' . api_get_cidreq() . '&action=export_to_pdf&id=' . $document_data['id'] . '">' .
-                    Display::return_icon('pdf.png', get_lang('Export2PDF'), array(), ICON_SIZE_SMALL) . '</a> ';
+                $pdf_icon = ' <a style="float:right".'.$prevent_multiple_click.' href="'.api_get_self().'?'.api_get_cidreq().'&action=export_to_pdf&id='.$document_data['id'].'">'.
+                    Display::return_icon('pdf.png', get_lang('Export2PDF'), array(), ICON_SIZE_SMALL).'</a> ';
             }
 
             if ($is_browser_viewable_file) {
-                $open_in_new_window_link = '<a href="' . $www . str_replace('%2F', '/', $url_path) . '?' . api_get_cidreq() . '" style="float:right"' . $prevent_multiple_click . ' target="_blank">' .
-                    Display::return_icon('open_in_new_window.png', get_lang('OpenInANewWindow'), array(), ICON_SIZE_SMALL) . '&nbsp;&nbsp;</a>';
+                $open_in_new_window_link = '<a href="'.$www.str_replace('%2F', '/', $url_path).'?'.api_get_cidreq().'" style="float:right"'.$prevent_multiple_click.' target="_blank">'.
+                    Display::return_icon('open_in_new_window.png', get_lang('OpenInANewWindow'), array(), ICON_SIZE_SMALL).'&nbsp;&nbsp;</a>';
             }
 
             if ($filetype == 'file') {
@@ -5296,9 +5296,9 @@ 
                     (preg_match('/wav$/i', urldecode($checkExtension)) && !preg_match('/_chnano_.wav$/i', urldecode($url))) ||
                     preg_match('/ogg$/i', urldecode($checkExtension))
                 ) {
-                    return '<span style="float:left" ' . $visibility_class . '>' .
-                    $title .
-                    '</span>' . $force_download_html . $send_to . $copy_to_myfiles . $open_in_new_window_link . $pdf_icon;
+                    return '<span style="float:left" '.$visibility_class.'>'.
+                    $title.
+                    '</span>'.$force_download_html.$send_to.$copy_to_myfiles.$open_in_new_window_link.$pdf_icon;
                 } elseif (
 
                     // Show preview
@@ -5316,7 +5316,7 @@ 
                     )
                 ) {
                     // Simpler version of showinframesmin.php with no headers
-                    $url = 'show_content.php?' . api_get_cidreq() . '&id=' . $document_data['id'];
+                    $url = 'show_content.php?'.api_get_cidreq().'&id='.$document_data['id'];
                     $class = 'ajax';
                     if ($visibility == false) {
                         $class = "ajax invisible";
@@ -5331,34 +5331,34 @@ 
                             'style' => 'float: left;'
                         ]
                     )
-                    . $force_download_html . $send_to . $copy_to_myfiles
-                    . $open_in_new_window_link . $pdf_icon;
+                    . $force_download_html.$send_to.$copy_to_myfiles
+                    . $open_in_new_window_link.$pdf_icon;
                 } else {
                     // For PDF Download the file.
                     $pdfPreview = null;
                     if ($ext != 'pdf' && !in_array($ext, $webOdflist)) {
-                        $url = 'showinframes.php?' . api_get_cidreq() . '&id=' . $document_data['id'];
+                        $url = 'showinframes.php?'.api_get_cidreq().'&id='.$document_data['id'];
                     } else {
                         $pdfPreview = Display::url(
                             Display::return_icon('preview.gif', get_lang('Preview')),
-                            api_get_path(WEB_CODE_PATH).'document/showinframes.php?' . api_get_cidreq() . '&id=' . $document_data['id'],
+                            api_get_path(WEB_CODE_PATH).'document/showinframes.php?'.api_get_cidreq().'&id='.$document_data['id'],
                             array('style' => 'float:right')
                         );
                     }
                     // No plugin just the old and good showinframes.php page
-                    return '<a href="' . $url . '" title="' . $tooltip_title_alt . '" style="float:left" ' . $visibility_class . ' >' . $title . '</a>' .
-                    $pdfPreview.$force_download_html . $send_to . $copy_to_myfiles . $open_in_new_window_link . $pdf_icon;
+                    return '<a href="'.$url.'" title="'.$tooltip_title_alt.'" style="float:left" '.$visibility_class.' >'.$title.'</a>'.
+                    $pdfPreview.$force_download_html.$send_to.$copy_to_myfiles.$open_in_new_window_link.$pdf_icon;
                 }
             } else {
-                return '<a href="' . $url . '" title="' . $tooltip_title_alt . '" ' . $visibility_class . ' style="float:left">' . $title . '</a>' .
-                $force_download_html . $send_to . $copy_to_myfiles . $open_in_new_window_link . $pdf_icon;
+                return '<a href="'.$url.'" title="'.$tooltip_title_alt.'" '.$visibility_class.' style="float:left">'.$title.'</a>'.
+                $force_download_html.$send_to.$copy_to_myfiles.$open_in_new_window_link.$pdf_icon;
             }
             // end copy files to users myfiles
         } else {
             // Icon column
             if (preg_match('/shared_folder/', urldecode($checkExtension)) &&
                 preg_match('/shared_folder$/', urldecode($checkExtension)) == false &&
-                preg_match('/shared_folder_session_' . $current_session_id . '$/', urldecode($url)) == false
+                preg_match('/shared_folder_session_'.$current_session_id.'$/', urldecode($url)) == false
             ) {
                 if ($filetype == 'file') {
                     //Sound preview with jplayer
@@ -5383,19 +5383,19 @@ 
                             api_get_setting('enable_nanogong') == 'true'
                         )
                     ) {
-                        $url = 'showinframes.php?' . api_get_cidreq() . '&id=' . $document_data['id'];
-                        return '<a href="' . $url . '" title="' . $tooltip_title_alt . '" ' . $visibility_class . ' style="float:left">' .
-                        DocumentManager::build_document_icon_tag($filetype, $path) .
-                        Display::return_icon('shared.png', get_lang('ResourceShared'), array()) . '</a>';
+                        $url = 'showinframes.php?'.api_get_cidreq().'&id='.$document_data['id'];
+                        return '<a href="'.$url.'" title="'.$tooltip_title_alt.'" '.$visibility_class.' style="float:left">'.
+                        DocumentManager::build_document_icon_tag($filetype, $path).
+                        Display::return_icon('shared.png', get_lang('ResourceShared'), array()).'</a>';
                     } else {
-                        return '<a href="' . $url . '" title="' . $tooltip_title_alt . '" ' . $visibility_class . ' style="float:left">' .
-                        DocumentManager::build_document_icon_tag($filetype, $path) .
-                        Display::return_icon('shared.png', get_lang('ResourceShared'), array()) . '</a>';
+                        return '<a href="'.$url.'" title="'.$tooltip_title_alt.'" '.$visibility_class.' style="float:left">'.
+                        DocumentManager::build_document_icon_tag($filetype, $path).
+                        Display::return_icon('shared.png', get_lang('ResourceShared'), array()).'</a>';
                     }
                 } else {
-                    return '<a href="' . $url . '" title="' . $tooltip_title_alt . '" target="' . $target . '"' . $visibility_class . ' style="float:left">' .
-                    DocumentManager::build_document_icon_tag($filetype, $path) .
-                    Display::return_icon('shared.png', get_lang('ResourceShared'), array()) . '</a>';
+                    return '<a href="'.$url.'" title="'.$tooltip_title_alt.'" target="'.$target.'"'.$visibility_class.' style="float:left">'.
+                    DocumentManager::build_document_icon_tag($filetype, $path).
+                    Display::return_icon('shared.png', get_lang('ResourceShared'), array()).'</a>';
                 }
             } else {
                 if ($filetype == 'file') {
@@ -5423,16 +5423,16 @@ 
                             api_get_setting('enable_nanogong') == 'true'
                         )
                     ) {
-                        $url = 'showinframes.php?' . api_get_cidreq() . '&id=' . $document_data['id']; //without preview
-                        return '<a href="' . $url . '" title="' . $tooltip_title_alt . '" ' . $visibility_class . ' style="float:left">' .
-                        DocumentManager::build_document_icon_tag($filetype, $path) . '</a>';
+                        $url = 'showinframes.php?'.api_get_cidreq().'&id='.$document_data['id']; //without preview
+                        return '<a href="'.$url.'" title="'.$tooltip_title_alt.'" '.$visibility_class.' style="float:left">'.
+                        DocumentManager::build_document_icon_tag($filetype, $path).'</a>';
                     } else {
-                        return '<a href="' . $url . '" title="' . $tooltip_title_alt . '" ' . $visibility_class . ' style="float:left">' .
-                        DocumentManager::build_document_icon_tag($filetype, $path) . '</a>';
+                        return '<a href="'.$url.'" title="'.$tooltip_title_alt.'" '.$visibility_class.' style="float:left">'.
+                        DocumentManager::build_document_icon_tag($filetype, $path).'</a>';
                     }
                 } else {
-                    return '<a href="' . $url . '" title="' . $tooltip_title_alt . '" target="' . $target . '"' . $visibility_class . ' style="float:left">' .
-                    DocumentManager::build_document_icon_tag($filetype, $path) . '</a>';
+                    return '<a href="'.$url.'" title="'.$tooltip_title_alt.'" target="'.$target.'"'.$visibility_class.' style="float:left">'.
+                    DocumentManager::build_document_icon_tag($filetype, $path).'</a>';
                 }
             }
         }
@@ -5456,7 +5456,7 @@ 
 
             if (preg_match('/_chnano_.wav$/i', $basename)) {
                 $icon = "jplayer_play.png";
-                $basename = 'wav' . ' ' . '(Nanogong)';
+                $basename = 'wav'.' '.'(Nanogong)';
             } else {
                 $basename = substr(strrchr($basename, '.'), 1);
             }
@@ -5472,13 +5472,13 @@ 
                 $userinfo = api_get_user_info(substr($basename, 8));
                 $icon = $userinfo['avatar_small'];
 
-                $basename = get_lang('UserFolder') . ' ' . $userinfo['complete_name'];
+                $basename = get_lang('UserFolder').' '.$userinfo['complete_name'];
                 $user_image = true;
             } elseif (strstr($path, 'shared_folder_session_')) {
                 if ($is_allowed_to_edit) {
-                    $basename = '***(' . api_get_session_name($current_session_id) . ')*** ' . get_lang('HelpUsersFolder');
+                    $basename = '***('.api_get_session_name($current_session_id).')*** '.get_lang('HelpUsersFolder');
                 } else {
-                    $basename = get_lang('UserFolders') . ' (' . api_get_session_name($current_session_id) . ')';
+                    $basename = get_lang('UserFolders').' ('.api_get_session_name($current_session_id).')';
                 }
                 $icon = 'folder_users.gif';
             } else {
@@ -5572,16 +5572,16 @@ 
         // Build URL-parameters for table-sorting
         $sort_params = array();
         if (isset($_GET['column'])) {
-            $sort_params[] = 'column=' . Security::remove_XSS($_GET['column']);
+            $sort_params[] = 'column='.Security::remove_XSS($_GET['column']);
         }
         if (isset($_GET['page_nr'])) {
-            $sort_params[] = 'page_nr=' . Security::remove_XSS($_GET['page_nr']);
+            $sort_params[] = 'page_nr='.Security::remove_XSS($_GET['page_nr']);
         }
         if (isset($_GET['per_page'])) {
-            $sort_params[] = 'per_page=' . Security::remove_XSS($_GET['per_page']);
+            $sort_params[] = 'per_page='.Security::remove_XSS($_GET['per_page']);
         }
         if (isset($_GET['direction'])) {
-            $sort_params[] = 'direction=' . Security::remove_XSS($_GET['direction']);
+            $sort_params[] = 'direction='.Security::remove_XSS($_GET['direction']);
         }
         $sort_params = implode('&amp;', $sort_params);
         $visibility_icon = ($visibility == 0) ? 'invisible' : 'visible';
@@ -5594,89 +5594,89 @@ 
         if ($is_read_only /* or ($session_id!=api_get_session_id()) */) {
             if (api_is_course_admin() || api_is_platform_admin()) {
                 if ($extension == 'svg' && api_browser_support('svg') && api_get_setting('enabled_support_svg') == 'true') {
-                    $modify_icons = '<a href="edit_draw.php?' . api_get_cidreq() . '&id=' . $document_id . '">' .
-                        Display::return_icon('edit.png', get_lang('Modify'), '', ICON_SIZE_SMALL) . '</a>';
-                } elseif (in_array($extension, $web_odf_extension_list)  && api_get_setting('enabled_support_odf') === true) {
-                    $modify_icons = '<a href="edit_odf.php?' . api_get_cidreq() . '&id=' . $document_id . '">' .
-                        Display::return_icon('edit.png', get_lang('Modify'), '', ICON_SIZE_SMALL) . '</a>';
+                    $modify_icons = '<a href="edit_draw.php?'.api_get_cidreq().'&id='.$document_id.'">'.
+                        Display::return_icon('edit.png', get_lang('Modify'), '', ICON_SIZE_SMALL).'</a>';
+                } elseif (in_array($extension, $web_odf_extension_list) && api_get_setting('enabled_support_odf') === true) {
+                    $modify_icons = '<a href="edit_odf.php?'.api_get_cidreq().'&id='.$document_id.'">'.
+                        Display::return_icon('edit.png', get_lang('Modify'), '', ICON_SIZE_SMALL).'</a>';
                 } elseif ($extension == 'png' || $extension == 'jpg' || $extension == 'jpeg' || $extension == 'bmp' || $extension == 'gif' || $extension == 'pxd' && api_get_setting('enabled_support_pixlr') == 'true') {
-                    $modify_icons = '<a href="edit_paint.php?' . api_get_cidreq() . '&id=' . $document_id . '">' .
-                        Display::return_icon('edit.png', get_lang('Modify'), '', ICON_SIZE_SMALL) . '</a>';
+                    $modify_icons = '<a href="edit_paint.php?'.api_get_cidreq().'&id='.$document_id.'">'.
+                        Display::return_icon('edit.png', get_lang('Modify'), '', ICON_SIZE_SMALL).'</a>';
                 } else {
-                    $modify_icons = '<a href="edit_document.php?' . api_get_cidreq() . '&id=' . $document_id. '">' .
-                        Display::return_icon('edit.png', get_lang('Modify'), '', ICON_SIZE_SMALL) . '</a>';
+                    $modify_icons = '<a href="edit_document.php?'.api_get_cidreq().'&id='.$document_id.'">'.
+                        Display::return_icon('edit.png', get_lang('Modify'), '', ICON_SIZE_SMALL).'</a>';
                 }
             } else {
                 $modify_icons = Display::return_icon('edit_na.png', get_lang('Modify'), '', ICON_SIZE_SMALL);
             }
-            $modify_icons .= '&nbsp;' . Display::return_icon('move_na.png', get_lang('Move'), array(), ICON_SIZE_SMALL);
+            $modify_icons .= '&nbsp;'.Display::return_icon('move_na.png', get_lang('Move'), array(), ICON_SIZE_SMALL);
             if (api_is_allowed_to_edit() || api_is_platform_admin()) {
-                $modify_icons .= '&nbsp;' . Display::return_icon($visibility_icon . '.png', get_lang('VisibilityCannotBeChanged'), '', ICON_SIZE_SMALL);
+                $modify_icons .= '&nbsp;'.Display::return_icon($visibility_icon.'.png', get_lang('VisibilityCannotBeChanged'), '', ICON_SIZE_SMALL);
             }
-            $modify_icons .= '&nbsp;' . Display::return_icon('delete_na.png', get_lang('Delete'), array(), ICON_SIZE_SMALL);
+            $modify_icons .= '&nbsp;'.Display::return_icon('delete_na.png', get_lang('Delete'), array(), ICON_SIZE_SMALL);
         } else {
             //Edit button
             if (in_array($path, DocumentManager::get_system_folders())) {
                 $modify_icons = Display::return_icon('edit_na.png', get_lang('Modify'), '', ICON_SIZE_SMALL);
-            } elseif ($is_certificate_mode ) {
+            } elseif ($is_certificate_mode) {
                 // gradebook category doesn't seem to be taken into account
-                $modify_icons = '<a href="edit_document.php?' . api_get_cidreq() . '&amp;id=' . $document_id . '&curdirpath=/certificates">' . Display::return_icon('edit.png', get_lang('Modify'), '', ICON_SIZE_SMALL) . '</a>';
+                $modify_icons = '<a href="edit_document.php?'.api_get_cidreq().'&amp;id='.$document_id.'&curdirpath=/certificates">'.Display::return_icon('edit.png', get_lang('Modify'), '', ICON_SIZE_SMALL).'</a>';
             } else {
                 if (api_get_session_id()) {
                     if ($document_data['session_id'] == api_get_session_id()) {
                         if ($extension == 'svg' && api_browser_support('svg') && api_get_setting('enabled_support_svg') == 'true') {
-                            $modify_icons = '<a href="edit_draw.php?' . api_get_cidreq() . '&amp;id=' . $document_id  . '">' .
-                                Display::return_icon('edit.png', get_lang('Modify'), '', ICON_SIZE_SMALL) . '</a>';
-                        } elseif (in_array($extension, $web_odf_extension_list)  && api_get_setting('enabled_support_odf') === true) {
-                            $modify_icons = '<a href="edit_odf.php?' . api_get_cidreq() . '&id=' . $document_id  . '">' .
-                                Display::return_icon('edit.png', get_lang('Modify'), '', ICON_SIZE_SMALL) . '</a>';
+                            $modify_icons = '<a href="edit_draw.php?'.api_get_cidreq().'&amp;id='.$document_id.'">'.
+                                Display::return_icon('edit.png', get_lang('Modify'), '', ICON_SIZE_SMALL).'</a>';
+                        } elseif (in_array($extension, $web_odf_extension_list) && api_get_setting('enabled_support_odf') === true) {
+                            $modify_icons = '<a href="edit_odf.php?'.api_get_cidreq().'&id='.$document_id.'">'.
+                                Display::return_icon('edit.png', get_lang('Modify'), '', ICON_SIZE_SMALL).'</a>';
                         } elseif ($extension == 'png' || $extension == 'jpg' || $extension == 'jpeg' || $extension == 'bmp' || $extension == 'gif' || $extension == 'pxd' && api_get_setting('enabled_support_pixlr') == 'true') {
-                            $modify_icons = '<a href="edit_paint.php?' . api_get_cidreq() . '&id=' . $document_id  . '">' .
-                                Display::return_icon('edit.png', get_lang('Modify'), '', ICON_SIZE_SMALL) . '</a>';
+                            $modify_icons = '<a href="edit_paint.php?'.api_get_cidreq().'&id='.$document_id.'">'.
+                                Display::return_icon('edit.png', get_lang('Modify'), '', ICON_SIZE_SMALL).'</a>';
                         } else {
-                            $modify_icons = '<a href="edit_document.php?' . api_get_cidreq() . '&amp;id=' . $document_id  . '">' .
-                                Display::return_icon('edit.png', get_lang('Modify'), '', ICON_SIZE_SMALL) . '</a>';
+                            $modify_icons = '<a href="edit_document.php?'.api_get_cidreq().'&amp;id='.$document_id.'">'.
+                                Display::return_icon('edit.png', get_lang('Modify'), '', ICON_SIZE_SMALL).'</a>';
                         }
                     } else {
-                        $modify_icons .= '&nbsp;' . Display::return_icon('edit_na.png', get_lang('Edit'), array(), ICON_SIZE_SMALL) . '</a>';
+                        $modify_icons .= '&nbsp;'.Display::return_icon('edit_na.png', get_lang('Edit'), array(), ICON_SIZE_SMALL).'</a>';
                     }
                 } else {
                     if ($extension == 'svg' && api_browser_support('svg') && api_get_setting('enabled_support_svg') == 'true') {
-                        $modify_icons = '<a href="edit_draw.php?' . api_get_cidreq() . '&amp;id=' . $document_id  . '">' .
-                            Display::return_icon('edit.png', get_lang('Modify'), '', ICON_SIZE_SMALL) . '</a>';
-                    } elseif (in_array($extension, $web_odf_extension_list)  && api_get_setting('enabled_support_odf') === true) {
-                        $modify_icons = '<a href="edit_odf.php?' . api_get_cidreq() . '&id=' . $document_id  . '">' .
-                            Display::return_icon('edit.png', get_lang('Modify'), '', ICON_SIZE_SMALL) . '</a>';
+                        $modify_icons = '<a href="edit_draw.php?'.api_get_cidreq().'&amp;id='.$document_id.'">'.
+                            Display::return_icon('edit.png', get_lang('Modify'), '', ICON_SIZE_SMALL).'</a>';
+                    } elseif (in_array($extension, $web_odf_extension_list) && api_get_setting('enabled_support_odf') === true) {
+                        $modify_icons = '<a href="edit_odf.php?'.api_get_cidreq().'&id='.$document_id.'">'.
+                            Display::return_icon('edit.png', get_lang('Modify'), '', ICON_SIZE_SMALL).'</a>';
                     } elseif ($extension == 'png' || $extension == 'jpg' || $extension == 'jpeg' || $extension == 'bmp' || $extension == 'gif' || $extension == 'pxd' && api_get_setting('enabled_support_pixlr') == 'true') {
-                        $modify_icons = '<a href="edit_paint.php?' . api_get_cidreq() . '&amp;id=' . $document_id . '">' .
-                            Display::return_icon('edit.png', get_lang('Modify'), '', ICON_SIZE_SMALL) . '</a>';
+                        $modify_icons = '<a href="edit_paint.php?'.api_get_cidreq().'&amp;id='.$document_id.'">'.
+                            Display::return_icon('edit.png', get_lang('Modify'), '', ICON_SIZE_SMALL).'</a>';
                     } else {
-                        $modify_icons = '<a href="edit_document.php?' . api_get_cidreq() . '&amp;id=' . $document_id  . '">' .
-                            Display::return_icon('edit.png', get_lang('Modify'), '', ICON_SIZE_SMALL) . '</a>';
+                        $modify_icons = '<a href="edit_document.php?'.api_get_cidreq().'&amp;id='.$document_id.'">'.
+                            Display::return_icon('edit.png', get_lang('Modify'), '', ICON_SIZE_SMALL).'</a>';
                     }
                 }
             }
 
             // Move button.
             if ($is_certificate_mode || in_array($path, DocumentManager::get_system_folders())) {
-                $modify_icons .= '&nbsp;' . Display::return_icon('move_na.png', get_lang('Move'), array(), ICON_SIZE_SMALL) . '</a>';
+                $modify_icons .= '&nbsp;'.Display::return_icon('move_na.png', get_lang('Move'), array(), ICON_SIZE_SMALL).'</a>';
             } else {
                 if (api_get_session_id()) {
                     if ($document_data['session_id'] == api_get_session_id()) {
-                        $modify_icons .= '&nbsp;<a href="' . api_get_self() . '?' . api_get_cidreq() . '&amp;id=' . $parent_id . '&amp;move=' . $document_id .  '">' .
-                            Display::return_icon('move.png', get_lang('Move'), array(), ICON_SIZE_SMALL) . '</a>';
+                        $modify_icons .= '&nbsp;<a href="'.api_get_self().'?'.api_get_cidreq().'&amp;id='.$parent_id.'&amp;move='.$document_id.'">'.
+                            Display::return_icon('move.png', get_lang('Move'), array(), ICON_SIZE_SMALL).'</a>';
                     } else {
-                        $modify_icons .= '&nbsp;' . Display::return_icon('move_na.png', get_lang('Move'), array(), ICON_SIZE_SMALL) . '</a>';
+                        $modify_icons .= '&nbsp;'.Display::return_icon('move_na.png', get_lang('Move'), array(), ICON_SIZE_SMALL).'</a>';
                     }
                 } else {
-                    $modify_icons .= '&nbsp;<a href="' . api_get_self() . '?' . api_get_cidreq() . '&amp;id=' . $parent_id . '&amp;move=' . $document_id .  '">' .
-                        Display::return_icon('move.png', get_lang('Move'), array(), ICON_SIZE_SMALL) . '</a>';
+                    $modify_icons .= '&nbsp;<a href="'.api_get_self().'?'.api_get_cidreq().'&amp;id='.$parent_id.'&amp;move='.$document_id.'">'.
+                        Display::return_icon('move.png', get_lang('Move'), array(), ICON_SIZE_SMALL).'</a>';
                 }
             }
 
             //Visibility button
             if ($is_certificate_mode) {
-                $modify_icons .= '&nbsp;' . Display::return_icon($visibility_icon . '.png', get_lang('VisibilityCannotBeChanged'), array(), ICON_SIZE_SMALL) . '</a>';
+                $modify_icons .= '&nbsp;'.Display::return_icon($visibility_icon.'.png', get_lang('VisibilityCannotBeChanged'), array(), ICON_SIZE_SMALL).'</a>';
             } else {
                 if (api_is_allowed_to_edit() || api_is_platform_admin()) {
                     if ($visibility_icon == 'invisible') {
@@ -5684,14 +5684,14 @@ 
                     } else {
                         $tip_visibility = get_lang('Hide');
                     }
-                    $modify_icons .= '&nbsp;<a href="' . api_get_self() . '?' . api_get_cidreq() . '&amp;id=' . $parent_id . '&amp;' . $visibility_command . '=' . $id . '&amp;' . $sort_params . '">' .
-                        Display::return_icon($visibility_icon . '.png', $tip_visibility, '', ICON_SIZE_SMALL) . '</a>';
+                    $modify_icons .= '&nbsp;<a href="'.api_get_self().'?'.api_get_cidreq().'&amp;id='.$parent_id.'&amp;'.$visibility_command.'='.$id.'&amp;'.$sort_params.'">'.
+                        Display::return_icon($visibility_icon.'.png', $tip_visibility, '', ICON_SIZE_SMALL).'</a>';
                 }
             }
 
             // Delete button
             if (in_array($path, DocumentManager::get_system_folders())) {
-                $modify_icons .= '&nbsp;' . Display::return_icon('delete_na.png', get_lang('ThisFolderCannotBeDeleted'), array(), ICON_SIZE_SMALL);
+                $modify_icons .= '&nbsp;'.Display::return_icon('delete_na.png', get_lang('ThisFolderCannotBeDeleted'), array(), ICON_SIZE_SMALL);
             } else {
                 $titleToShow = addslashes(basename($document_data['title']));
 
@@ -5699,23 +5699,23 @@ 
                     $_GET['curdirpath'] == '/certificates' &&
                     DocumentManager::get_default_certificate_id(api_get_course_id()) == $id
                 ) {
-                    $modify_icons .= '&nbsp;<a href="' . api_get_self() . '?' . api_get_cidreq() . '&amp;curdirpath=' . $curdirpath . '&action=delete_item&id='.$parent_id.'&deleteid='.$document_id.'&amp;' . $sort_params . 'delete_certificate_id=' . $id . '" onclick="return confirmation(\'' . $titleToShow . '\');">' .
-                        Display::return_icon('delete.png', get_lang('Delete'), array(), ICON_SIZE_SMALL) . '</a>';
+                    $modify_icons .= '&nbsp;<a href="'.api_get_self().'?'.api_get_cidreq().'&amp;curdirpath='.$curdirpath.'&action=delete_item&id='.$parent_id.'&deleteid='.$document_id.'&amp;'.$sort_params.'delete_certificate_id='.$id.'" onclick="return confirmation(\''.$titleToShow.'\');">'.
+                        Display::return_icon('delete.png', get_lang('Delete'), array(), ICON_SIZE_SMALL).'</a>';
                 } else {
                     if ($is_certificate_mode) {
-                        $modify_icons .= '&nbsp;<a href="' . api_get_self() . '?' . api_get_cidreq() . '&amp;curdirpath=' . $curdirpath . '&action=delete_item&id='.$parent_id.'&deleteid=' . $document_id  . '&amp;' . $sort_params . '" onclick="return confirmation(\'' . $titleToShow . '\');">' .
-                            Display::return_icon('delete.png', get_lang('Delete'), array(), ICON_SIZE_SMALL) . '</a>';
+                        $modify_icons .= '&nbsp;<a href="'.api_get_self().'?'.api_get_cidreq().'&amp;curdirpath='.$curdirpath.'&action=delete_item&id='.$parent_id.'&deleteid='.$document_id.'&amp;'.$sort_params.'" onclick="return confirmation(\''.$titleToShow.'\');">'.
+                            Display::return_icon('delete.png', get_lang('Delete'), array(), ICON_SIZE_SMALL).'</a>';
                     } else {
                         if (api_get_session_id()) {
                             if ($document_data['session_id'] == api_get_session_id()) {
-                                $modify_icons .= '&nbsp;<a href="' . api_get_self() . '?' . api_get_cidreq() . '&amp;curdirpath=' . $curdirpath . '&action=delete_item&id='.$parent_id.'&deleteid='.$document_id  . '&amp;' . $sort_params . '" onclick="return confirmation(\'' . $titleToShow . '\');">'.
-                                    Display::return_icon('delete.png', get_lang('Delete'), array(), ICON_SIZE_SMALL) . '</a>';
+                                $modify_icons .= '&nbsp;<a href="'.api_get_self().'?'.api_get_cidreq().'&amp;curdirpath='.$curdirpath.'&action=delete_item&id='.$parent_id.'&deleteid='.$document_id.'&amp;'.$sort_params.'" onclick="return confirmation(\''.$titleToShow.'\');">'.
+                                    Display::return_icon('delete.png', get_lang('Delete'), array(), ICON_SIZE_SMALL).'</a>';
                             } else {
-                                $modify_icons .= '&nbsp;' . Display::return_icon('delete_na.png', get_lang('ThisFolderCannotBeDeleted'), array(), ICON_SIZE_SMALL);
+                                $modify_icons .= '&nbsp;'.Display::return_icon('delete_na.png', get_lang('ThisFolderCannotBeDeleted'), array(), ICON_SIZE_SMALL);
                             }
                         } else {
-                            $modify_icons .= '&nbsp;<a href="' . api_get_self() . '?' . api_get_cidreq() . '&amp;curdirpath=' . $curdirpath . '&action=delete_item&id='.$parent_id.'&deleteid='.$document_id . '&amp;' . $sort_params . '" onclick="return confirmation(\'' . $titleToShow. '\');">' .
-                                Display::return_icon('delete.png', get_lang('Delete'), array(), ICON_SIZE_SMALL) . '</a>';
+                            $modify_icons .= '&nbsp;<a href="'.api_get_self().'?'.api_get_cidreq().'&amp;curdirpath='.$curdirpath.'&action=delete_item&id='.$parent_id.'&deleteid='.$document_id.'&amp;'.$sort_params.'" onclick="return confirmation(\''.$titleToShow.'\');">'.
+                                Display::return_icon('delete.png', get_lang('Delete'), array(), ICON_SIZE_SMALL).'</a>';
                         }
                     }
                 }
@@ -5727,15 +5727,15 @@ 
                 // nothing to do
             } else {
                 if ($usePpt2lp && $formatType) {
-                    $modify_icons .= '&nbsp;<a class="convertAction" href="#" ' .
-                        'data-documentId = ' . $document_id .
-                        ' data-formatType = ' . $formatType . '>' .
+                    $modify_icons .= '&nbsp;<a class="convertAction" href="#" '.
+                        'data-documentId = '.$document_id.
+                        ' data-formatType = '.$formatType.'>'.
                         Display::return_icon(
                             'convert.png',
                             get_lang('Convert'),
                             array(),
                             ICON_SIZE_SMALL
-                        ) . '</a>';
+                        ).'</a>';
                 }
             }
         }
@@ -5743,8 +5743,8 @@ 
         if ($type == 'file' && ($extension == 'html' || $extension == 'htm')) {
             if ($is_template == 0) {
                 if ((isset($_GET['curdirpath']) && $_GET['curdirpath'] != '/certificates') || !isset($_GET['curdirpath'])) {
-                    $modify_icons .= '&nbsp;<a href="' . api_get_self() . '?' . api_get_cidreq() . '&amp;curdirpath=' . $curdirpath . '&amp;add_as_template=' . $id .  '&amp;' . $sort_params . '">' .
-                        Display::return_icon('wizard.png', get_lang('AddAsTemplate'), array(), ICON_SIZE_SMALL) . '</a>';
+                    $modify_icons .= '&nbsp;<a href="'.api_get_self().'?'.api_get_cidreq().'&amp;curdirpath='.$curdirpath.'&amp;add_as_template='.$id.'&amp;'.$sort_params.'">'.
+                        Display::return_icon('wizard.png', get_lang('AddAsTemplate'), array(), ICON_SIZE_SMALL).'</a>';
                 }
                 if (isset($_GET['curdirpath']) && $_GET['curdirpath'] == '/certificates') {//allow attach certificate to course
                     $visibility_icon_certificate = 'nocertificate';
@@ -5758,21 +5758,21 @@ 
                         $certificate = get_lang('NoDefaultCertificate');
                     }
                     if (isset($_GET['selectcat'])) {
-                        $modify_icons .= '&nbsp;<a href="' . api_get_self() . '?' . api_get_cidreq() . '&amp;curdirpath=' . $curdirpath . '&amp;selectcat=' . intval($_GET['selectcat']) . '&amp;set_certificate=' . $id . '&amp;' . $sort_params . '">';
+                        $modify_icons .= '&nbsp;<a href="'.api_get_self().'?'.api_get_cidreq().'&amp;curdirpath='.$curdirpath.'&amp;selectcat='.intval($_GET['selectcat']).'&amp;set_certificate='.$id.'&amp;'.$sort_params.'">';
                         $modify_icons .= Display::return_icon($visibility_icon_certificate.'.png', $certificate);
                         $modify_icons .= '</a>';
                         if ($is_preview) {
-                            $modify_icons .= '&nbsp;<a target="_blank"  href="' . api_get_self() . '?' . api_get_cidreq() . '&amp;curdirpath=' . $curdirpath . '&amp;set_preview=' . $id . '&amp;' . $sort_params . '" >' .
-                                Display::return_icon('preview_view.png', $preview, '', ICON_SIZE_SMALL) . '</a>';
+                            $modify_icons .= '&nbsp;<a target="_blank"  href="'.api_get_self().'?'.api_get_cidreq().'&amp;curdirpath='.$curdirpath.'&amp;set_preview='.$id.'&amp;'.$sort_params.'" >'.
+                                Display::return_icon('preview_view.png', $preview, '', ICON_SIZE_SMALL).'</a>';
                         }
                     }
                 }
             } else {
-                $modify_icons .= '&nbsp;<a href="' . api_get_self() . '?' . api_get_cidreq() . '&curdirpath=' . $curdirpath . '&amp;remove_as_template=' . $id. '&amp;' . $sort_params . '">' .
-                    Display::return_icon('wizard_na.png', get_lang('RemoveAsTemplate'), '', ICON_SIZE_SMALL) . '</a>';
+                $modify_icons .= '&nbsp;<a href="'.api_get_self().'?'.api_get_cidreq().'&curdirpath='.$curdirpath.'&amp;remove_as_template='.$id.'&amp;'.$sort_params.'">'.
+                    Display::return_icon('wizard_na.png', get_lang('RemoveAsTemplate'), '', ICON_SIZE_SMALL).'</a>';
             }
-            $modify_icons .= '&nbsp;<a href="' . api_get_self() . '?' . api_get_cidreq() . '&action=export_to_pdf&id=' . $id . '">' .
-                Display::return_icon('pdf.png', get_lang('Export2PDF'), array(), ICON_SIZE_SMALL) . '</a>';
+            $modify_icons .= '&nbsp;<a href="'.api_get_self().'?'.api_get_cidreq().'&action=export_to_pdf&id='.$id.'">'.
+                Display::return_icon('pdf.png', get_lang('Export2PDF'), array(), ICON_SIZE_SMALL).'</a>';
         }
         return $modify_icons;
     }
@@ -5841,7 +5841,7 @@ 
                     // 3. inside a subfolder of the folder you want to move
                     if (($curdirpath != $folder) &&
                         ($folder != $move_file) &&
-                        (substr($folder, 0, strlen($move_file) + 1) != $move_file . '/')
+                        (substr($folder, 0, strlen($move_file) + 1) != $move_file.'/')
                     ) {
                         $path_displayed = $folder;
                         // If document title is used, we have to display titles instead of real paths...
@@ -5858,7 +5858,7 @@ 
             foreach ($folders as $folder) {
                 if (($curdirpath != $folder) &&
                     ($folder != $move_file) &&
-                    (substr($folder, 0, strlen($move_file) + 1) != $move_file . '/')
+                    (substr($folder, 0, strlen($move_file) + 1) != $move_file.'/')
                 ) {
                     // Cannot copy dir into his own subdir
                     $path_displayed = DocumentManager::get_titles_of_path($folder);
@@ -5900,10 +5900,10 @@ 
                 // If this path has soon been stored here we don't need a new query
                 $path_displayed .= $tmp_folders_titles[$tmp_path];
             } else {
-                $sql = 'SELECT title FROM ' . Database::get_course_table(TABLE_DOCUMENT) . '
-                    WHERE c_id = ' . $course_id . ' AND path LIKE BINARY "' . $tmp_path . '"';
+                $sql = 'SELECT title FROM '.Database::get_course_table(TABLE_DOCUMENT).'
+                    WHERE c_id = ' . $course_id.' AND path LIKE BINARY "'.$tmp_path.'"';
                 $rs = Database::query($sql);
-                $tmp_title = '/' . Database::result($rs, 0, 0);
+                $tmp_title = '/'.Database::result($rs, 0, 0);
                 $path_displayed .= $tmp_title;
                 $tmp_folders_titles[$tmp_path] = $tmp_title;
             }
@@ -5939,7 +5939,7 @@ 
         $clean_curdirpath = Security::remove_XSS($curdirpath);
         if ($clean_curdirpath == '/shared_folder') {
             return true;
-        } elseif ($clean_curdirpath == '/shared_folder_session_' . $current_session_id) {
+        } elseif ($clean_curdirpath == '/shared_folder_session_'.$current_session_id) {
             return true;
         } else {
             return false;
@@ -5955,7 +5955,7 @@ 
         $clean_path = Security::remove_XSS($path);
         if (strpos($clean_path, 'shared_folder/sf_user_')) {
             return true;
-        } elseif (strpos($clean_path, 'shared_folder_session_' . $current_session_id . '/sf_user_')) {
+        } elseif (strpos($clean_path, 'shared_folder_session_'.$current_session_id.'/sf_user_')) {
             return true;
         } else {
             return false;
@@ -5968,11 +5968,11 @@ 
      */
     public static function is_my_shared_folder($user_id, $path, $current_session_id)
     {
-        $clean_path = Security::remove_XSS($path) . '/';
+        $clean_path = Security::remove_XSS($path).'/';
         //for security does not remove the last slash
-        $main_user_shared_folder = '/shared_folder\/sf_user_' . $user_id . '\//';
+        $main_user_shared_folder = '/shared_folder\/sf_user_'.$user_id.'\//';
         //for security does not remove the last slash
-        $main_user_shared_folder_session = '/shared_folder_session_' . $current_session_id . '\/sf_user_' . $user_id . '\//';
+        $main_user_shared_folder_session = '/shared_folder_session_'.$current_session_id.'\/sf_user_'.$user_id.'\//';
 
         if (preg_match($main_user_shared_folder, $clean_path)) {
             return true;
@@ -6245,7 +6245,7 @@ 
                 ON (i.c_id = d.c_id)
                 WHERE
                     d.id = i.ref AND
-                    i.tool = '" . TOOL_DOCUMENT . "'
+                    i.tool = '".TOOL_DOCUMENT."'
                     $conditionSession AND
                     i.c_id = $courseId AND
                     d.c_id = $courseId ";
@@ -6253,9 +6253,9 @@ 
         $result = Database::query($sql);
         $documents = Database::store_result($result, 'ASSOC');
         if ($documents) {
-            $course_dir = $courseInfo['directory'] . '/document';
+            $course_dir = $courseInfo['directory'].'/document';
             $sys_course_path = api_get_path(SYS_COURSE_PATH);
-            $base_work_dir = $sys_course_path . $course_dir;
+            $base_work_dir = $sys_course_path.$course_dir;
 
             foreach ($documents as $document) {
                 $documentId = $document['id'];