diff --git a/main/coursecopy/recycle_course.php b/main/coursecopy/recycle_course.php
index f5a4823df4..63fc11cd5e 100755
--- a/main/coursecopy/recycle_course.php
+++ b/main/coursecopy/recycle_course.php
@@ -18,7 +18,7 @@ api_protect_course_script(true);
 
 // Check access rights (only teachers are allowed here)
 if (!api_is_allowed_to_edit()) {
-	api_not_allowed(true);
+    api_not_allowed(true);
 }
 
 // Section for the tabs
@@ -63,9 +63,7 @@ if (Security::check_token('post') && (
     }
     $cr = new CourseRecycler($course);
     $cr->recycle($recycle_type);
-
     Display::display_confirmation_message(get_lang('RecycleFinished'));
-
 } elseif (Security::check_token('post') && (
         isset($_POST['recycle_option']) &&
         $_POST['recycle_option'] == 'select_items'
diff --git a/main/inc/lib/link.lib.php b/main/inc/lib/link.lib.php
index 053edc330a..34c4fef700 100755
--- a/main/inc/lib/link.lib.php
+++ b/main/inc/lib/link.lib.php
@@ -805,11 +805,11 @@ class Link extends Model
 
         $sql = "SELECT *, linkcat.id
                 FROM $tblLinkCategory linkcat
-                INNER JOIN $tblItemProperty itemproperties
-                ON (linkcat.id = itemproperties.ref AND linkcat.c_id = itemproperties.c_id)
+                INNER JOIN $tblItemProperty ip
+                ON (linkcat.id = ip.ref AND linkcat.c_id = ip.c_id)
                 WHERE
-                    itemproperties.tool = '" . TOOL_LINK_CATEGORY . "' AND
-                    (itemproperties.visibility = '0' OR itemproperties.visibility = '1')
+                    ip.tool = '" . TOOL_LINK_CATEGORY . "' AND
+                    (ip.visibility = '0' OR ip.visibility = '1')
                     $sessionCondition AND
                     linkcat.c_id = " . $courseId . "
                 ORDER BY linkcat.display_order DESC";
@@ -831,11 +831,11 @@ class Link extends Model
 
         $sql = "SELECT DISTINCT linkcat.*, visibility
                 FROM $tblLinkCategory linkcat
-                INNER JOIN $tblItemProperty itemproperties
-                ON (linkcat.id = itemproperties.ref AND linkcat.c_id = itemproperties.c_id)
+                INNER JOIN $tblItemProperty ip
+                ON (linkcat.id = ip.ref AND linkcat.c_id = ip.c_id)
                 WHERE
-                    itemproperties.tool = '" . TOOL_LINK_CATEGORY . "' AND
-                    (itemproperties.visibility = '0' OR itemproperties.visibility = '1')
+                    ip.tool = '" . TOOL_LINK_CATEGORY . "' AND
+                    (ip.visibility = '0' OR ip.visibility = '1')
                     $sessionCondition AND
                     linkcat.c_id = " . $courseId . "
                 ORDER BY linkcat.display_order DESC
@@ -863,17 +863,19 @@ class Link extends Model
         // Condition for the session.
         $condition_session = api_get_session_condition($session_id, true, true, 'link.session_id');
         $content = '';
-        $sql = "SELECT *, link.id FROM $tbl_link link
-                INNER JOIN $TABLE_ITEM_PROPERTY itemproperties
-                ON (link.id=itemproperties.ref AND link.c_id = itemproperties.c_id)
+        $sql = "SELECT *, link.id 
+                FROM $tbl_link link
+                INNER JOIN $TABLE_ITEM_PROPERTY ip
+                ON (link.id=ip.ref AND link.c_id = ip.c_id)
                 WHERE
-                    itemproperties.tool='" . TOOL_LINK . "' AND
+                    ip.tool='" . TOOL_LINK . "' AND
                     link.category_id='" . $catid . "' AND
-                    (itemproperties.visibility='0' OR itemproperties.visibility='1')
+                    (ip.visibility='0' OR ip.visibility='1')
                     $condition_session AND
                     link.c_id = " . $course_id . " AND
-                    itemproperties.c_id = " . $course_id . "
+                    ip.c_id = " . $course_id . "
                 ORDER BY link.display_order ASC";
+
         $result = Database:: query($sql);
         $numberoflinks = Database:: num_rows($result);
         if ($numberoflinks > 0) {
@@ -1498,8 +1500,6 @@ class Link extends Model
     public static function listLinksAndCategories($course_id, $session_id, $categoryId, $show = 'none', $token = null)
     {
         $tbl_link = Database::get_course_table(TABLE_LINK);
-
-        $_user = api_get_user_info();
         $categoryId = intval($categoryId);
 
         /*	Action Links */
@@ -1544,7 +1544,6 @@ class Link extends Model
 
             // Validation when belongs to a session
             $showChildren = $categoryId == $myrow['id'] || $show == 'all';
-            $session_img = api_get_session_image($myrow['session_id'], $_user['status']);
             $myrow['description'] = $myrow['description'];
 
             $strVisibility = '';
diff --git a/src/Chamilo/CourseBundle/Component/CourseCopy/Course.php b/src/Chamilo/CourseBundle/Component/CourseCopy/Course.php
index 618e940f41..692adec0f1 100644
--- a/src/Chamilo/CourseBundle/Component/CourseCopy/Course.php
+++ b/src/Chamilo/CourseBundle/Component/CourseCopy/Course.php
@@ -40,7 +40,7 @@ class Course
             if (is_array($resources)) {
                 foreach ($resources as $resource) {
                     Resource::setClassType($resource);
-                    if ($resource->links_to($resource_to_check) ) {
+                    if ($resource->links_to($resource_to_check)) {
                         return true;
                     }
                     if ($type == RESOURCE_LEARNPATH && get_class($resource)=='CourseCopyLearnpath') {
@@ -85,7 +85,7 @@ class Course
      */
     public function show()
     {
-        
+
     }
 
     /**
diff --git a/src/Chamilo/CourseBundle/Component/CourseCopy/CourseRecycler.php b/src/Chamilo/CourseBundle/Component/CourseCopy/CourseRecycler.php
index 34034015ac..ff7f3b7bdb 100644
--- a/src/Chamilo/CourseBundle/Component/CourseCopy/CourseRecycler.php
+++ b/src/Chamilo/CourseBundle/Component/CourseCopy/CourseRecycler.php
@@ -330,7 +330,7 @@ class CourseRecycler
     {
         $link_cat_table = Database :: get_course_table(TABLE_LINK_CATEGORY);
         $link_table = Database :: get_course_table(TABLE_LINK);
-        $sql = "SELECT lc.id FROM ".$link_cat_table." lc
+        $sql = "SELECT lc.id FROM $link_cat_table lc
                 LEFT JOIN ".$link_table." l
                 ON
                     lc.id=l.category_id AND
diff --git a/src/Chamilo/CourseBundle/Component/CourseCopy/CourseRestorer.php b/src/Chamilo/CourseBundle/Component/CourseCopy/CourseRestorer.php
index 3f6da4afec..61e1808f01 100644
--- a/src/Chamilo/CourseBundle/Component/CourseCopy/CourseRestorer.php
+++ b/src/Chamilo/CourseBundle/Component/CourseCopy/CourseRestorer.php
@@ -1307,15 +1307,14 @@ class CourseRestorer
         if (is_object($link_cat) && !$link_cat->is_restored()) {
             $sql = "SELECT MAX(display_order) FROM  $link_cat_table
 			        WHERE c_id = ".$this->destination_course_id;
-            $result=Database::query($sql);
-            list($orderMax)=Database::fetch_array($result,'NUM');
-            $display_order=$orderMax+1;
+            $result = Database::query($sql);
+            list($orderMax) = Database::fetch_array($result, 'NUM');
+            $display_order = $orderMax + 1;
 
             $params['c_id'] = $this->destination_course_id;
             $params['category_title'] = self::DBUTF8($link_cat->title);
             $params['description'] = self::DBUTF8($link_cat->description);
             $params['display_order'] = $display_order;
-
             $new_id = Database::insert($link_cat_table, $params);
 
             if ($new_id) {